+publisher:"Oregon State University" +contributor:("Perry, David A.")

Oregon State University

1. Pilz, David P. Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays.

Degree: MS, Forest Science, 1982, Oregon State University

URL: http://hdl.handle.net/1957/11380

► Field and greenhouse bioassays were used to compare the mycorrhizal associations of Douglas-fir seedlings from undisturbed forests, and nonburned and burned portions of clearcuts on… (more)

▼ Field and greenhouse bioassays were used to compare the mycorrhizal associations of Douglas-fir seedlings from undisturbed forests, and nonburned and burned portions of clearcuts on three Sites in the west-central Cascades of Oregon. Field soil transfers and greenhouse soil pasteurization and reinoculation were used to investigate soil biology and inoculum potential. Similar mycorrhizal associations developed in soils from the three regeneration treatments in both field and greenhouse. Regarciless of soil origin, proportionately snore mycorrflizae developed in clearcuts (especially on site 2); the Brown mycorrhiza type was more frequent in nonburned clearcuts than in other treatments, and the most Cenococcum mycorrhizae formed in burned clearcuts. Rhizopogon species occurred in the clay-silt soil of the low-elevation site only when that soil was loosened and aerated in the soil transfer. The greatest numbers of Cenococcum mycorrhizae were found at the high-elevation site, and the greatest number of Brown mycorrhizae on the mid-elevation site. Major field mycorrhiza types iere also observed in the greenhouse. Rilizopogon and Brown types constituted the same proportion of total mycorrhizae on both greenhouse and field seedlings from sites 2 and 3, but not site 1. Greenhouse proportions of Cenococcum and other infrequent mycorrhiza types did not reflect field proportions. Seedling growth, as well as nonrnycorrhizal and total root tip numbers were increased in pasteurized soil. Reinoculation of pasteurized soils reduced nonmycorrhizal and total root tip numbers, albeit not to original levels. A reinoculation ratio of 1 (nonpasteurized soil): 9 (pasteurized soil) produced as many mycorrhizae as entirely nonpasteurized soil. For these sites, fungal propagule availability or alterations of soil biology and chemistry by timber harvest and slash burning are less important as determinants of first year mycorrhizal associations than above-ground alterations in the seedling environment. Mycorrhiza formation may be impaired by dense or clayey soils. Some soil microbiological factors limit seedling growth. Silvicultural management of the above-ground environment to ensure prompt regeneration and inoculation of nursery stock with several species of site-specific mycosymbionts snould optimize rnycorrhizal symioses of outplanted seedlings. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Douglas fir

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APA (6^th Edition):

Pilz, D. P. (1982). Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11380

Chicago Manual of Style (16^th Edition):

Pilz, David P. “Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays.” 1982. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11380.

MLA Handbook (7^th Edition):

Pilz, David P. “Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays.” 1982. Web. 08 Mar 2021.

Vancouver:

Pilz DP. Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays. [Internet] [Masters thesis]. Oregon State University; 1982. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11380.

Council of Science Editors:

Pilz DP. Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays. [Masters Thesis]. Oregon State University; 1982. Available from: http://hdl.handle.net/1957/11380

Oregon State University

2. Egeland, Dawn M. Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades.

Degree: MS, Forest Ecology, 1985, Oregon State University

URL: http://hdl.handle.net/1957/13251

► Douglas-fir and western hemlock growth and stocking were examined on two neighboring clear-cut watersheds in the Western Cascades of Oregon and related to the intensity… (more)

▼ Douglas-fir and western hemlock growth and stocking were examined on two neighboring clear-cut watersheds in the Western Cascades of Oregon and related to the intensity of burning and logging disturbance, habitat type, soil type, aspect and the influence of percent cover of both invading Ceanothus species and residual Acer circinatum. The nitrogen content of the surface soil, both total and mineralizable nitrogen, and current and year old Douglas-fir foliar nitrogen contents as percent dry weight were determined. Total nitrogen content was determined by micro-kjeldahl techniques. Mineralizable nitrogen was obtained through anaerobic incubation at 40 C for seven days. Douglas-fir establishment and growth were not limited on severely burned or compacted sites. A strong preference for unburned sites was shown by western hemlock, however. Appreciable Douglas-fir stocking, basal diameters, basal areas and relative densities were supported by Rhma/Gash, Acci/Gash and Cola habitat types. Cola communities also contained the greatest western hemlock stocking and basal area values. Soil type influenced Douglas-fir but not western hemlock. Largest Douglas-fir basal diameters, basal areas and relative densities were found on lateritic soil types. Both Douglas-fir and western hemlock stocking were favored on northerly exposures, though the basal diameters of Douglas-fir were maximized on level and westerly aspects. The percent cover of snowbrush (Ceànothus velutinus), redstem ceanothus (C. sanguineus), deerbrush (C. integerrimus) and vine maple (Acer circinatum) was also examined in relation to site factors. Cover values of all Ceanothus species were highest on disturbed and! or burned sites. For the most part, the three Ceànothus species had varying preferences in terms of habitat type, soil type and aspect expressed as degrees of cover. Percent vine maple cover was only influenced by burning and habitat type, preferring sites undisturbed by burning and Rhma/Gash, Acci/Gash and Acci/Bene communities in which it was also an important component before logging. Nultiple regressions indicated that no site factor, shrub cover or nitrogen variable accounted for more than sixteen percent of the total explained variation in conifer growth or stocking. Site factors could explain the most variation. greater Douglas-fir basal diameters occurred on plots with snowbrush cover, while the presenèe of redstem ceanothus was associated with lower Douglas – fir basal diameters, basal areas and relative densities. The presence of Ceanothus species was generally not associated with increased soil or foliar nitrogen content, though Douglas-fir year old needles showed slightly higher mean values on sites with redstem ceanothus. Plots containing vine maple, however, contained greater quantities of mineralizable nitrogen. Nitrogen data indicates that though total soil nitrogen levels appear adequate for Douglas-fir nutrition, mineralizable and foliar nitrogen may be limiting at least during the growing season. hi1e partially ameliorated, results suggest… Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Forest site quality – Oregon

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APA (6^th Edition):

Egeland, D. M. (1985). Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13251

Chicago Manual of Style (16^th Edition):

Egeland, Dawn M. “Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades.” 1985. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13251.

MLA Handbook (7^th Edition):

Egeland, Dawn M. “Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades.” 1985. Web. 08 Mar 2021.

Vancouver:

Egeland DM. Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades. [Internet] [Masters thesis]. Oregon State University; 1985. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13251.

Council of Science Editors:

Egeland DM. Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades. [Masters Thesis]. Oregon State University; 1985. Available from: http://hdl.handle.net/1957/13251

Oregon State University

3. Kaiser, Elisabeth H. The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range.

Degree: MS, Forest Science, 1986, Oregon State University

URL: http://hdl.handle.net/1957/13253

► The relative influences of stand structure and topographic variation on volume growth, photosynthetic surface area, and stem growth efficiency were determined for six 17 to… (more)

▼ The relative influences of stand structure and topographic variation on volume growth, photosynthetic surface area, and stem growth efficiency were determined for six 17 to 23 year old well stocked stands in the central Oregon Coast Range. Plots were assigned to topographic classes (aspect, slope steepness, and slope position), by which stand density, stand growth and efficiency, and individual tree size and growth were compared. Plots were also assigned to classes according to the hardwood content and the same characteristics compared. In addition, individual trees were assigned to and compared by crown dominance classes. Multiple regression analyses were performed to show correlations of growth and efficiency variables with stand structure and topography variables. Results showed that not only stocking levels but also stand structure influence both stand and individual tree volume growth and efficiency. At a given Relative Density, stands with a lower stem density of large trees grew more volume and were more efficient than stands with many small trees. In addition, stands with more variation in tree size were more efficient than were more uniformly sized stands. The effect of stand structure overrode the effect of topography on growth and efficiency with two exceptions: stand volume growth and efficiency were higher on southerly than on northerly aspects and in areas of higher rainfall. In these areas, stands of a given density carried more leaf area, which may help to explain why growth was better there. In the regression analyses, stand volume growth correlated positively with Douglas-fir stand basal area, average annual rainfall, Relative Density, and an aspect variable that indicated better growth on southerly aspects. Stand volume growth correlated negatively with stem density of Douglas-fir. Stand leaf area correlated positively with stand basal area, average annual rainfall, stem density, and south aspects. Stand stem growth efficiency (volume growth per unit of leaf area) correlated positively with Relative Density, individual tree size variance, and southerly aspects, and correlated negatively with stem density and leaf area. Individual tree growth was mostly determined by the tree basal area, although there was a small negative effect of increasing stand basal area. The more dominant a tree was in a stand the greater was its growth, but suppressed trees were the most efficient, whether efficiency was calculated in terms of stem volume growth per unit individual tree leaf area or basal area growth per unit individual tree basal area. The presence of hardwoods of the small size and low densities in this study had no effect on absolute growth, however Douglas-fir grew more efficiently in pure stands than when mixed with hardwoods. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Douglas fir – Oregon – Growth

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APA (6^th Edition):

Kaiser, E. H. (1986). The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13253

Chicago Manual of Style (16^th Edition):

Kaiser, Elisabeth H. “The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range.” 1986. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13253.

MLA Handbook (7^th Edition):

Kaiser, Elisabeth H. “The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range.” 1986. Web. 08 Mar 2021.

Vancouver:

Kaiser EH. The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range. [Internet] [Masters thesis]. Oregon State University; 1986. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13253.

Council of Science Editors:

Kaiser EH. The influence of stand structure and topography on growth, leaf area and efficiency of young Douglas-fir in the Oregon Coast Range. [Masters Thesis]. Oregon State University; 1986. Available from: http://hdl.handle.net/1957/13253

Oregon State University

4. Brainerd, Richard E. Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon.

Degree: MS, Forest Science, 1988, Oregon State University

URL: http://hdl.handle.net/1957/13281

► A greenhouse bioassay was used to compare ectomycorrhiza formation and diversity in soils from undisturbed and clearcut and burned areas in moist mesic, moist montane… (more)

▼ A greenhouse bioassay was used to compare ectomycorrhiza formation and diversity in soils from undisturbed and clearcut and burned areas in moist mesic, moist montane and dry montane forest types representing a gradient of environmental harshness. It was hypothesized that mycorrhiza diversity decreases with increasing environmental harshness and that stability of mycorrhiza formation following clearcutting and burning is positively related to mycorrhiza diversity. Soils were collected from three forest/clearcut pairs in each forest type. Clearcut and burned areas were well-stocked with both planted and naturally seeded conifers. The field soils were used to inoculate greenhouse planting media in which Douglas-fir and ponderosa pine seedlings were grown. Douglas-fir seedlings were grown in moist mesic and moist montane soils and ponderosa pine seedlings were grown in dry montane soils. Numbers of mycorrhizal root tips and short roots by mycorrhiza type were determined and used to calculate percent mycorrhizal colonization, mycorrhiza type proportions, diversity indices, and branching indices. For undisturbed forest soils, percent mycorrhizal colonization and diversity index of root tips increased across the gradient from the moist mesic to the dry montane sites. Numbers of total and mycorrhizal root tips were significantly higher in undisturbed soils from the dry montane type but did not differ between undisturbed moist montane and moist mesic soils. Greater numbers of total and mycorrhizal root tips in the dry montane soils may be partially due to the tendency of ponderosa pine roots to branch more than those of Douglas-fir. Two mycorrhiza types, Rhizopogon sp. and an unidentified brown type, dominated all soils and were usually accompanied by several minor types, each of which seldom comprised more than 5% of the mycorrhizal root tips. When clearcut and burned soils were compared with undisturbed forest soils within each forest type, percent mycorrhizal colonization was higher in clearcut than in undisturbed soils from both the moist mesic and the dry montane types. Numbers of mycorrhizal root tips were higher in clearcut soils from the moist mesic and the dry montane types while numbers of total root tips were higher in clearcut soils from the dry montane type only. Mycorrhizal diversity was consistently lower in clearcut soils from all forest types but in no case was the difference in diversity between forest and clearcut significant. Type composition differed between forest and clearcut soils from the dry montane type but not from the moist mesic or the moist montane types. Mycorrhiza diversity and overall stability of mycorrhiza formation following clearcutting and burning. Mycorrhiza formation was significantly higher in clearcut than in forest soils at the sites with both the highest and lowest mycorrhiza diversity. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Ectomycorrhizas – Oregon

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APA (6^th Edition):

Brainerd, R. E. (1988). Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13281

Chicago Manual of Style (16^th Edition):

Brainerd, Richard E. “Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon.” 1988. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13281.

MLA Handbook (7^th Edition):

Brainerd, Richard E. “Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon.” 1988. Web. 08 Mar 2021.

Vancouver:

Brainerd RE. Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon. [Internet] [Masters thesis]. Oregon State University; 1988. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13281.

Council of Science Editors:

Brainerd RE. Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon. [Masters Thesis]. Oregon State University; 1988. Available from: http://hdl.handle.net/1957/13281

Oregon State University

5. Borchers, Susan L. Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts.

Degree: MS, Forest Science, 1988, Oregon State University

URL: http://hdl.handle.net/1957/13279

► A greenhouse bioassay was used to compare the effects of soils collected at different distances from hardwood species on the growth, mycorrhiza formation, and foliar… (more)

▼ A greenhouse bioassay was used to compare the effects of soils collected at different distances from hardwood species on the growth, mycorrhiza formation, and foliar nutrient concentrations of Douglas-fir seedlings. Soil nutrient concentrations and bulk densities were also determined. Soils were collected from two southwestern Oregon sites that had been clearcut and broadcast burned 5 years previously. The sites, poorly stocked with conifer reproduction, were occupied primarily by grasses, forbs, and scattered individuals of tanoak (Lithocarpus densiflora (Hook. and Arn.) Rehd.), Pacific madrone (Arbutus menziesii Pursh), and canyon live oak (Quercus chrysolepis Liebm.). Five-month-old seedlings grown in media containing mineral soil collected beneath hardwood crowns had an average 70% greater height, 2.2 times greater weight (roots plus shoots) and almost 2 times more total and mycorrhizal root-tips than seedlings grown in media containing soil collected farther than 4 m from a hardwood. Rhizopogon sp. and Cenococcum qeohilum dominated on seedlings grown in hardood soils and an unidentified brown mycorrhiza on seedlings grown in open-area soils. The "hardwood effect" did not vary among the three hardwood species or between the two sites. A study of soils collected at various distances from hardwoods indicated that the effect extended between 2 and 3 m. Average foliar nitrogen was higher for seedlings grown in hardwood soils, but differences were not statistically significant. Differences in other foliar nutrients of seedlings grown on soils from beneath the three hardwood species were inconsistent. There were no consistent differences in soil nutrient concentrations; however, rates of mineralizable nitrogen (anaerobic) were from 2 to nearly 6 times higher in hardwood than in open-area soils, and soil pH was higher. Results suggest that the pioneering hardwoods strongly influence soil biological activity in these clearcuts and impose one or more soil patterns that favor establishment and growth of conifer seedlings. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Mycorrhizas

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APA (6^th Edition):

Borchers, S. L. (1988). Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13279

Chicago Manual of Style (16^th Edition):

Borchers, Susan L. “Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts.” 1988. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13279.

MLA Handbook (7^th Edition):

Borchers, Susan L. “Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts.” 1988. Web. 08 Mar 2021.

Vancouver:

Borchers SL. Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts. [Internet] [Masters thesis]. Oregon State University; 1988. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13279.

Council of Science Editors:

Borchers SL. Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts. [Masters Thesis]. Oregon State University; 1988. Available from: http://hdl.handle.net/1957/13279

Oregon State University

6. Elhadi, Faroug Mohamed. Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions.

Degree: PhD, Forest Science, 1987, Oregon State University

URL: http://hdl.handle.net/1957/13334

► Seeds of A. senegal (L.) Wild from four populations across a rainfall gradient in western Sudan were grown in two sites. One site is on… (more)

▼ Seeds of A. senegal (L.) Wild from four populations across a rainfall gradient in western Sudan were grown in two sites. One site is on an upper dune crest - (sandy soil) and the other site is on the lower slope of the same dune - (sandy loam soil). Soils significantly influenced all growth parameters except foliar N concentration. Seedlings of all populations survived and grew better on the upper dune crest (sandy soil). Populations differed only in foliar N. concentration. Although the number of first order branches did not differ among populations, there were large differences among individual seedlings in two of the populations. In a second study four populations of A. senegal from western Sudan were cross inoculated with soil from the same populations. Population x soil inoculum interaction was significant for all measured growth parameters. Specific nitrogenase activity, averaging 22.2 uml/g fw/h, did not differ significantly between populations, soil inoculum Sources, or with interaction between the two. The greatest specificity between populations and source of inoculum was shown by shoot and nodule weights in populations from the extremes of the rainfall gradient. Seedlings from all populations exhibited a relatively high relationship between home soil and root length. In a third ezperjement, two Acacia senega1 seed lots, one collected near Elobjed, a relatively low rainfall zone, and the other near Rae, a high rainfall zone (both In western Sudan), were inoculated with each of the following Rhjzobjum strains: strain AR 14, isolated from A. radiana, strain AN 12, isolated from A. nilotica adjestrjnqs, strain P3 12, isolated from Prosopis juliflora, strain TAL 1595 isolated from A. pennetu1a, and strain ASK isolated from A. Senegal. Popu1ation x rhizobium strain interaction was significant for shoot height. from the high rainfall zone was Height of Kas seedlings more sensitive to strain treatment than that of Elobied seedlings from the low rainfall zone, Strain main effect was highly significant for Shoot Weight. Seedlings inoculated with ASK strain, isolated from A. Senegal, had a greater weight, especially in comparison to PJ 12 strains, which were isolated from prosopis juliflora. Seedlings inoculated with the ASK strain nodulated earlier than seedlings inoculated with other strains. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Acacia senegal – Sudan – Growth

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APA (6^th Edition):

Elhadi, F. M. (1987). Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/13334

Chicago Manual of Style (16^th Edition):

Elhadi, Faroug Mohamed. “Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions.” 1987. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13334.

MLA Handbook (7^th Edition):

Elhadi, Faroug Mohamed. “Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions.” 1987. Web. 08 Mar 2021.

Vancouver:

Elhadi FM. Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions. [Internet] [Doctoral dissertation]. Oregon State University; 1987. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13334.

Council of Science Editors:

Elhadi FM. Studies on Acacia senegal (L.) Wild. in western Sudan with special reference to variation among populations, host x soil inoculum interaction among populations, and host x Rhizobium strains interactions. [Doctoral Dissertation]. Oregon State University; 1987. Available from: http://hdl.handle.net/1957/13334

Oregon State University

7. Goldberg, Susan B. Revegetation of disturbed semiarid grassland in Canyonlands National Park.

Degree: MS, Forest Science, 1993, Oregon State University

URL: http://hdl.handle.net/1957/10588

► A grassland restoration project was conducted in Canyonlands National Park on an area recently disturbed due to construction. Two native grasses (Oryzopsis hymenoides and Stipa… (more)

Subjects/Keywords: Revegetation – Utah – Canyonlands National Park

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APA (6^th Edition):

Goldberg, S. B. (1993). Revegetation of disturbed semiarid grassland in Canyonlands National Park. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/10588

Chicago Manual of Style (16^th Edition):

Goldberg, Susan B. “Revegetation of disturbed semiarid grassland in Canyonlands National Park.” 1993. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10588.

MLA Handbook (7^th Edition):

Goldberg, Susan B. “Revegetation of disturbed semiarid grassland in Canyonlands National Park.” 1993. Web. 08 Mar 2021.

Vancouver:

Goldberg SB. Revegetation of disturbed semiarid grassland in Canyonlands National Park. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10588.

Council of Science Editors:

Goldberg SB. Revegetation of disturbed semiarid grassland in Canyonlands National Park. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/10588

Oregon State University

8. Malavasi, Ubirajara Contro. Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat.

Degree: PhD, Forest Science, 1983, Oregon State University

URL: http://hdl.handle.net/1957/11008

► Early and late seral tree species were compared for inter-and intraspecific competitive ability; within-population genetic variability; and allocation patterns of soluble sugars and starch seasonally… (more)

▼ Early and late seral tree species were compared for inter-and intraspecific competitive ability; within-population genetic variability; and allocation patterns of soluble sugars and starch seasonally and in response to shade and nitrogen fertilization. Species were Douglas-fir (early seral) and western hemlock (late seral) from a low elevation habitat; and noble fir (early seral) and silver fir (late seral) from a high elevation habitat. Mortality increased with density and peaked at 15% for western hemlock, 35% for Douglas-fir, 48% for noble fir, and 90% for silver fir. In general, early seral species grew faster and attained larger final size than late seral species, while species did not differ in response to competition. However, there were considerable differences among half-sibling families within each species. Ranges in average top weights for families grown at low or medium (16 or 4 cm2 of initial growing space) were: western hemlock, 50-300 mg; Douglas-fir, 100-900 mg; silver fir, 10-190 mg; noble fir, 90-250 mg. Root size was less variable resulting in highly significant density-correlated rank changes in shoot/root ratio (S/R ratio) for families of all species except noble fir. Western hemlock grown with Douglas-fir had shoots 24% smaller and roots 36% smaller than when grown with other western hemlock and Douglas-fir roots were 40% larger when grown with a mixture of Douglas-fir and western hemlock than when grown entirely with one species or the other. Families of both species differed in their SIR ratio response to varying neighbor composition. In contrast, neighbor composition had little effect on silver fir and noble fir. Field-grown seedlings were 30% smaller and less responsive to treatments than pot-grown. In all species, 66 to 70% of total dry weight was soluble sugars and starch prior to budbreak with roughly two-thirds of this as starch. Following budbreak, available carbohydrates decreased to 25 to 30% of total dry weight (maintained through the growing season). Late seral species had higher root sugars during the growing season than early seral species. Shading either decreased or did not affect growth of early seral species and increased growth of late seral species. It had little effect on available carbohydrates. Nitrogen fertilization increased SIR ratio of western hemlock from 1.9 to 3.3 and of the other species from 1.2 to 2.2; and reduced sugar concentration in all species but had little effect on starch. Family variances in prebudbreak root sugars were 17 times greater in western hemlock than in Douglas-fir and noble fir. Family variance in growth traits was greater in the low elevation than in the high elevation species. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Plant competition

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APA (6^th Edition):

Malavasi, U. C. (1983). Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/11008

Chicago Manual of Style (16^th Edition):

Malavasi, Ubirajara Contro. “Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat.” 1983. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11008.

MLA Handbook (7^th Edition):

Malavasi, Ubirajara Contro. “Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat.” 1983. Web. 08 Mar 2021.

Vancouver:

Malavasi UC. Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat. [Internet] [Doctoral dissertation]. Oregon State University; 1983. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11008.

Council of Science Editors:

Malavasi UC. Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat. [Doctoral Dissertation]. Oregon State University; 1983. Available from: http://hdl.handle.net/1957/11008

Oregon State University

9. Riitters, K. H. (Kurt H.). Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density.

Degree: PhD, Forest Science, 1985, Oregon State University

URL: http://hdl.handle.net/1957/11069

► This thesis is concerned with developing techniques for identifying "superior" Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) parent trees based on seedling progeny evaluation. The growth responses… (more)

Subjects/Keywords: Douglas fir – Genetics

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APA (6^th Edition):

Riitters, K. H. (. H. ). (1985). Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/11069

Chicago Manual of Style (16^th Edition):

Riitters, K H (Kurt H ). “Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density.” 1985. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11069.

MLA Handbook (7^th Edition):

Riitters, K H (Kurt H ). “Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density.” 1985. Web. 08 Mar 2021.

Vancouver:

Riitters KH(H). Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density. [Internet] [Doctoral dissertation]. Oregon State University; 1985. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11069.

Council of Science Editors:

Riitters KH(H). Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density. [Doctoral Dissertation]. Oregon State University; 1985. Available from: http://hdl.handle.net/1957/11069

Oregon State University

10. Rojas-Melo, Nestor S. Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong.

Degree: MS, Forest Science, 1989, Oregon State University

URL: http://hdl.handle.net/1957/11067

► Nodulated roots of young red alder trees and soil samples were collected from a 5 year old clearcut on Mary's Peak, Oregon. Frankia was isolated… (more)

▼ Nodulated roots of young red alder trees and soil samples were collected from a 5 year old clearcut on Mary's Peak, Oregon. Frankia was isolated from root nodules, andactinomycetes from nodules, roots, and soil. A total of 229 pure culture actinomycete isolates were recovered: 131 colonies from root surfaces, 52 colonies from soil, and 46 colonies from nodule surfaces. Thirty morphologically different colonies were selected for the experiment, 10 from each source. Red alder seedlings were grown in the greenhouse for 6 months. They were placed in Ray Leach tubes containing a 1:1 soil mixture of peat moss and vermiculite. Seedlings were inoculated with a Frankia-actinomycete combination when they were 1 month old. N-free mineral solution was applied weekly. The study consisted of thirty-two treatments, thirty in which seedlings were inoculated with Frankia plus one of thirty actinomycete isolates (10 each from nodule surfaces, root surfaces, and open soil), one inoculated with Frankia only, and one in which seedlings were inoculated with neither Frankia nor an actinomycete. Each inoculation treatment was replicated on ten seedlings. Three variables were measured: acetylene reduction, oven-dry nodule weight, and total dry bioxnass of seedlings. Actinoinycete colonies varied significantly in their influence on nodule weight per seedling, acetylene reduced per gram nodule, and total seedling weight, but not in their effects on acetylene reduced per seedling. Colonies isolated from nodule surfaces produced slightly greater nodule weights on seedlings than colonies isolated from roots, but colonies from the three sources (nodules, roots, and open soil) did not differ in their effects on the other measured variables. Compared to seedlings inoculated only with Frankia, five of the thirty actinomycete colonies that were tested enhanced acetylene reduction per gram nodule; one colony reduced nodule weight, and none altered the amount of acetylene reduced per seedling. By far the major influence of actinoinycetes was to reduce seedling weight, 13 of 30 colonies producing seedlings that were smaller than those inoculated only with Frankia. Advisors/Committee Members: Perry, David A. (advisor).

Subjects/Keywords: Red alder – Oregon

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APA (6^th Edition):

Rojas-Melo, N. S. (1989). Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11067

Chicago Manual of Style (16^th Edition):

Rojas-Melo, Nestor S. “Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong.” 1989. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11067.

MLA Handbook (7^th Edition):

Rojas-Melo, Nestor S. “Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong.” 1989. Web. 08 Mar 2021.

Vancouver:

Rojas-Melo NS. Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong. [Internet] [Masters thesis]. Oregon State University; 1989. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11067.

Council of Science Editors:

Rojas-Melo NS. Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong. [Masters Thesis]. Oregon State University; 1989. Available from: http://hdl.handle.net/1957/11067

Oregon State University

11. Velazquez-Martinez, Alejandro. Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades.

Degree: PhD, Forest Science, 1990, Oregon State University

URL: http://hdl.handle.net/1957/11207

► The objectives of this research were to study: a) the effect of thinning and treatments consisting of pruning and multinutrient fertilization on aboveground biolnass increment,… (more)

▼ The objectives of this research were to study: a) the effect of thinning and treatments consisting of pruning and multinutrient fertilization on aboveground biolnass increment, growth efficiency (GE), and foliar nutrients; b) the influence of topoedaphic variables (soil nutrients, slope, aspect, and rock content) and foliar nutrients on both leaf area increment and GE; and c) the influence of topoedaphic variables on the rate of iiJneralizable N. Studies were conducted in young Douglas-fir plantations in the western Cascades of Oregon. Net aboveground biomass increment over a 6-year period averaged 14.5, 7.8, and 5.5 Mgha-1.yr-1 for unthinned, noderately thinned, and heavily thinned stands, respectively. Aboveground biornass increment and GE were analyzed in three 2-year periods. Density affected aboveground biomass increment in all periods, and there was an increasingly significant treatment effect in each period, but no significant interaction between stocking density and treatment. Stand density had the major effect on GE, but there was also a significant interaction between stocking density and treatment during the 1985-'87 period. Foliar analysis indicated that thinning improved N, K, and Mg nutrition, and resulted in increased translocation of K from one-year old to current year foliage. Multivariate and regression analyses suggest that relative leaf area increment is correlated most closely with one or another measure of Mg, K, and N availability, whereas GE correlates most strongly with leaf area index, mineralizable N, and foliar Mg content. Mineralizable N in two soil depths did not vary significantly by stocking density, treatment, or density-treatment interaction. The rate of mineralizable nitrogen expressed as concentration basis averaged 49 per cent lower at the 20-40 cm depth than at the 0-20 cm depth. Mineralizable N expressed on an area basis correlated positively with total soil N, exchangeable Ca, and adjusted aspect, and negatively with rock content and slope steepness. Advisors/Committee Members: Perry, David A. (advisor), Myrold, Dave (committee member).

Subjects/Keywords: Douglas fir – Oregon – Growth

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APA (6^th Edition):

Velazquez-Martinez, A. (1990). Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/11207

Chicago Manual of Style (16^th Edition):

Velazquez-Martinez, Alejandro. “Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades.” 1990. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11207.

MLA Handbook (7^th Edition):

Velazquez-Martinez, Alejandro. “Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades.” 1990. Web. 08 Mar 2021.

Vancouver:

Velazquez-Martinez A. Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades. [Internet] [Doctoral dissertation]. Oregon State University; 1990. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11207.

Council of Science Editors:

Velazquez-Martinez A. Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades. [Doctoral Dissertation]. Oregon State University; 1990. Available from: http://hdl.handle.net/1957/11207

Oregon State University

12. Carloni, Kenneth R. The ecological legacy of Indian burning practices in southwestern Oregon.

Degree: PhD, Forest Science, 2005, Oregon State University

URL: http://hdl.handle.net/1957/13086

► Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to… (more)

▼ Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change in southwestern Oregon? A brief introduction to the Little River study area is followed by a cultural and ecological history of the watershed. Historical, ecological and archaeological data are used to describe shifts in landscape structure, stand structure and fire behavior. Changes in corridor/patch/matrix relationships, increases in stand densities, and changes in stand age and species structure are documented, and changes in fire dynamics from frequent to infrequent, and small to large are corroborated with descriptive statistics from the nearby 2002 Umpqua Fires. Hypotheses are then proposed to test the relative influence of humans vs. climate on landscape change during Aboriginal (<1820) vs. Euroagrarian (1850-1950) cultural phases. While precipitation shows no correlation with fire frequency or tree recruitment before 1820, significant associations are observed from 1850 to 1950. Moreover, a significant correlation exists between fire frequency and subsequent tree recruitment after 1850, but is not observed during aboriginal times. This suggests that indigenous management fires may have obscured precipitation influences that become apparent only after 1850. In order to test spatial hypotheses concerning the associations between indigenous humans and the landscape, archaeological sites were digitized into a GIS, and ergonomic pathways were modeled between them. These maps are then compared to historically fire-maintained upland meadows interpreted from 1946 aerial photos. A significant spatial correlation was found between archaeological sites and historic meadows, and a highly significant spatial correlation was found between modeled travel networks and historic meadows. The close spatial association between cultural features and fire-maintained habitats again suggests active landscape management by local Indians. These associations are corroborated with historical records. After summarizing the shifts in ecological conditions and describing current conditions, I argue that while restoring the landscape to aboriginal conditions is no longer possible, emulating those conditions within the framework of the Little River Adaptive Management Area Plan can improve the resilience and productivity of the Little River watershed. Advisors/Committee Members: Perry, David A. (advisor), Kauffman, Boone (committee member).

Subjects/Keywords: Forest management – Oregon – Little River Watershed – History

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APA (6^th Edition):

Carloni, K. R. (2005). The ecological legacy of Indian burning practices in southwestern Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/13086

Chicago Manual of Style (16^th Edition):

Carloni, Kenneth R. “The ecological legacy of Indian burning practices in southwestern Oregon.” 2005. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13086.

MLA Handbook (7^th Edition):

Carloni, Kenneth R. “The ecological legacy of Indian burning practices in southwestern Oregon.” 2005. Web. 08 Mar 2021.

Vancouver:

Carloni KR. The ecological legacy of Indian burning practices in southwestern Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 2005. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13086.

Council of Science Editors:

Carloni KR. The ecological legacy of Indian burning practices in southwestern Oregon. [Doctoral Dissertation]. Oregon State University; 2005. Available from: http://hdl.handle.net/1957/13086

Oregon State University

13. Mackasey, J. Patrick. A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia.

Degree: MS, Forest Science, 1993, Oregon State University

URL: http://hdl.handle.net/1957/13505

► A sustainable resource development plan framework was prepared for the Neskonlith Indian Band, who are located in the interior of British Columbia, Canada. The framework… (more)

▼ A sustainable resource development plan framework was prepared for the Neskonlith Indian Band, who are located in the interior of British Columbia, Canada. The framework intends to address issues involving; integrated resource management, traditional native land management, ecosystem management, and community-based resource management. A soft systems (Wilson & Morren, 1990) methodology was used to work with the community and help assess the current management state and to begin the process of determining the desired future condition of their land base and how this can help build the community. However, the band was prepared only to work through the first two (out of seven) stages of the methodology. The study area used was 4259 ha in size, of which 1316 ha was reserve land. A good portion of this area is forested (52.4%), primarily with interior Douglas-Fir (Pseudotsuga menziesii var, glauca). The study area is also represented by 13.9% open range, 8,2% cultivated land and a large lake (11 %) . Current and past resource management activities on this area include; forestry, mining, agriculture, range, recreation, and parks. The band is interested in how the land base can be managed from an integrated resource management perspective and in learning how non-consumptive uses of the forest can be further explored. This framework attempts to answer the questions and provide the band with a working Geographic Information System database and some management alternatives to examine. A Terrasoft GIS was used, which allowed for both vector and raster processing. Data layers were compiled and assembled for a variety of resource values. These data layers were analyzed using models which produced three management alternatives. These alternatives included the following emphases: economic; ecological; and balanced. The economic alternative focused solely on resource extraction. The ecological alternative focuses on protection of the environment as the main emphasis, and large parcels of land are excluded from any resource development activities. The balanced alternative offered a balance between the first two alternatives, allowing for a reasonable level of resource management activities, while protecting important ecological components across the landscape. The trade-offs expected to be encountered with each management scenario were discussed with the community and the balanced alternative was resolved as the preferred choice. This framework is expected to be used by the band to help construct a comprehensive integrated resource management plan. Recommendations are provided with the third management alternative to assist the band with integrated resource management planning. It was concluded that although the band has much information available on resource management, they still have a great deal of work left ahead of them to become fully involved in a functional, integrated resource management program. Advisors/Committee Members: Perry, David A. (advisor), Tappeiner, John (committee member).

Subjects/Keywords: Natural resources – British Columbia – Management

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APA (6^th Edition):

Mackasey, J. P. (1993). A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13505

Chicago Manual of Style (16^th Edition):

Mackasey, J Patrick. “A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia.” 1993. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13505.

MLA Handbook (7^th Edition):

Mackasey, J Patrick. “A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia.” 1993. Web. 08 Mar 2021.

Vancouver:

Mackasey JP. A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13505.

Council of Science Editors:

Mackasey JP. A sustainable resource development plan framework for the Neskonlith Indian Band, British Columbia. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/13505

Oregon State University

14. Rojas-Melo, , Nestor S. Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon.

Degree: PhD, Forest Science, 1997, Oregon State University

URL: http://hdl.handle.net/1957/13544

► Bioassays using red alder and snowbrush plants grown in soils collected from a clearcut, a young Douglas-fir plantation, and an old-growth stand were conducted. Sites… (more)

▼ Bioassays using red alder and snowbrush plants grown in soils collected from a clearcut, a young Douglas-fir plantation, and an old-growth stand were conducted. Sites are located at the Andrews Experimental Forest, Oregon. In the first bioassays, more alder than snowbrush plants survived and nodulated. Of the plants that survived, more red alder plants nodulated when grown in clearcut soils than in other soils, and more snowbrush nodulated when grown in soils from the young stand. With the exception of acetylene reduction per plant, response variables differed among the three sites, however soil samples within sites were also a significant source of variation. Red alder biomass and nodule weight were highest when plants were grown in clearcut soils. Snowbrush biomass and nodule weight were highest when grown in soils from the young stand. The biomass of snowbrush plants grown in clearcut soils averaged higher in bottom slope soils than in soils from any other position. Two additional bioassays using red alder and snowbrush plants consisted of adding sequentially to clearcut soils Frankia plus macronutrients, micronutrients, mycorrhizal fungi, and Pseudomonas fluorescens. There was no interaction between treatment and location for either species. There were no significant treatment effects for snowbrush, but there were significant treatment effects for red alder. Red alder seedlings given Frankia and macronutrients had greater biomass and reduced more acetylene than seedlings grown without additions. Adding Alpova diplophloeus increased acetylene reduction by 33% over that attained with Frankia and macronutrients alone. The combined effect of Frankia, macronutrients and the mycorrhizal fungus was to increase acetylene reduction by 136% over controls. Adding micronutrients to Frankia and macronutrients reduced acetylene reduction by nearly one-half, completely negating the positive effect of the Frankia and macronutrients. The presence of the mycorrhizal fungus appeared to buffer the negative effects of micronutrients. Red alder seedlings grown in upper slope soil had greater biomass and reduced more acetylene than seedlings grown in down slope soil. In contrast, snowbrush plants grown in bottom slope soil had greater biomass, nodule weight, and reduced more acetylene than seedlings grown in any of the other slope positions. Because slope positions were not replicated, any conclusions we draw apply only to the four locations we measured on the single slope. Advisors/Committee Members: Perry, David A. (advisor), Li, Ching Y. (committee member).

Subjects/Keywords: Frankia – Oregon – H.J. Andrews Experimental Forest

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APA (6^th Edition):

Rojas-Melo, , N. S. (1997). Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/13544

Chicago Manual of Style (16^th Edition):

Rojas-Melo, , Nestor S. “Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon.” 1997. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13544.

MLA Handbook (7^th Edition):

Rojas-Melo, , Nestor S. “Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon.” 1997. Web. 08 Mar 2021.

Vancouver:

Rojas-Melo, NS. Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 1997. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13544.

Council of Science Editors:

Rojas-Melo, NS. Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon. [Doctoral Dissertation]. Oregon State University; 1997. Available from: http://hdl.handle.net/1957/13544

Oregon State University

15. Simard, S. (Suzanne). Interspecific carbon transfer in ectomycorrhizal tree species mixtures.

Degree: PhD, Forest Science, 1995, Oregon State University

URL: http://hdl.handle.net/1957/13759

► The overall goal of this study was to investigate influences of ectomycorrhizae (EM) and interspecific carbon transfer on seedling performance in species mixtures. The objectives… (more)

▼ The overall goal of this study was to investigate influences of ectomycorrhizae (EM) and interspecific carbon transfer on seedling performance in species mixtures. The objectives were to: (I) determine the potential for EM to link paper birch and Douglas-fir, (ii) quantify gross and net interspecific carbon transfer, and (iii) evaluate effect of transfer on seedling performance. A soil bioassay showed that paper birch and Douglas-fir shared seven EM morphotypes in common over 90% of their root tips, indicating potential for hyphal connections. The number and percent colonization of shared morphotypes were greater when species were grown in dual- than monoculture. Reciprocal labelling of paper birch and Douglas-fir with ¹³CO₂[subscript(gas)] and ¹⁴CO₂[subscript(gas)] in laboratory rootboxes and the field resulted in bi-directional transfer, with net gain by Douglas-fir. In rootboxes, gross and net transfer represented 29% and 4% of total isotope assimilated by both species. Net transfer was three times greater and one-way gross transfer to Douglas-fir 50% greater where interconnecting hyphae were left intact than where severed, but high p-values (p>0.05) leave in question whether hyphal connections facilitated transfer. In the field, gross and net transfer between paper birch and Douglas-fir represented 4% and 2%, respectively, of total isotope assimilated in 1993, and 7% and 6%, respectively, in 1994. Net transfer to Douglas-fir occurred where Douglas-fir grew full sun in 1993, and in all light intensities in 1994. The change in amount transferred and shading effect between years coincided with greater root development and improved seedling vigor in 1994 than 1993. Net and gross transfer were two times greater in 5% than 50% or 100% sun treatments in 1994, suggesting transfer was affected by changes in photosynthate sink strength of Douglas-fir. Isotope transferred to western redcedar represented <1-18% of gross transfer between paper birch and Douglas-fir, indicating most carbon was transferred between EM species via interconnecting hyphae. Douglas-fir seedlings were grown in untrenched and trenched treatments to evaluate the ability of overstory paper birch and Douglas-fir to influence seedling EM inoculation patterns and performance. Greater diversity of EM coincided with higher photosynthesis among seedlings in the untrenched than trenched treatment. The effect on seedling performance was attributed to differences in EM colonization, because trenching had no effect on soil water, soil nutrients, or light availability. Advisors/Committee Members: Perry, David A. (advisor), Molina, Randy (committee member).

Subjects/Keywords: Ectomycorrhizas – Ecology

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APA (6^th Edition):

Simard, S. (. (1995). Interspecific carbon transfer in ectomycorrhizal tree species mixtures. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/13759

Chicago Manual of Style (16^th Edition):

Simard, S (Suzanne). “Interspecific carbon transfer in ectomycorrhizal tree species mixtures.” 1995. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/13759.

MLA Handbook (7^th Edition):

Simard, S (Suzanne). “Interspecific carbon transfer in ectomycorrhizal tree species mixtures.” 1995. Web. 08 Mar 2021.

Vancouver:

Simard S(. Interspecific carbon transfer in ectomycorrhizal tree species mixtures. [Internet] [Doctoral dissertation]. Oregon State University; 1995. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/13759.

Council of Science Editors:

Simard S(. Interspecific carbon transfer in ectomycorrhizal tree species mixtures. [Doctoral Dissertation]. Oregon State University; 1995. Available from: http://hdl.handle.net/1957/13759

Oregon State University

16. Borchers, Jeffrey G. Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon.

Degree: PhD, Forest Science, 1990, Oregon State University

URL: http://hdl.handle.net/1957/10183

► The effect of physical factors such as soil structure, bulk density, parent material, and topographic variables on soil C and N dynamics and ectomycorrhizal inocululu… (more)

▼ The effect of physical factors such as soil structure, bulk density, parent material, and topographic variables on soil C and N dynamics and ectomycorrhizal inocululu potential in forests of southwest Oregon were investigated In the high-elevation white fir (Abies concolor (Gord. & Glend.) Lindl.) zone, two old poorly-vegetated clearcuts with different soil textures (sandy loam and silt loam) were compared with adjacent uncut areas. Significant differences in soil C and N were not detected at either site, but the site with silt loam soil had 20-25% lower C and N concentrations in several particle size fractions. Compared to adjacent forests, anaerobically mineralizable N (Nmin) was lower only in the clearcut with sandy loam soil. A larger pool of physically-stabilized but chemically labile N probably sustained Nmin levels on the clearcut with finer-textured soil. In another investigation on these sites, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were used to bioassay six soil particlesize fractions for ectoniycorrhiza (EM) formation. Six major EM types were found to be heterogeneously distributed among size fractions. Increased colonization by one EM type following mechanical disaggregation of soil from a clearcut indicated propagules had a "clumpy" distribution in soil or had been suppressed by actinomycete activity. A separate investigation in a lower elevation vegetation zone (the mixed evergreen zone) of southwest Oregon compared soil and forest floor C and N in forests and 5-year-old clearcuts that had been broadcast-burned (BB) or hand piled-and-burned (PB). Total C and N, and Nmin were determined variously in litter, F-layer, 0-5 cm soil, and 5-15 cm soil. In clearcuts, decreases in C and N stored in these layers exceeded amounts typically removed by harvest. BB clearcuts had significantly lower Nmin levels in the 0-5 cm layer compared to adjacent forests. The disappearance of F layers from BB and PB clearcuts represented the largest loss of N from the layers we sampled. The proportion of N lost from these layers was related by regression of C:N ratios of the two soil layers. This proportion and both C N ratios were in turn correlated with slope, aspect, and soil bulk density. We incorporated the relationships into a conceptual model depicting a complex topographic influence on N losses following forest disturbance. Advisors/Committee Members: Perry, David A. (advisor), Sollins, Phil (committee member).

Subjects/Keywords: Forest soils – Oregon

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APA (6^th Edition):

Borchers, J. G. (1990). Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/10183

Chicago Manual of Style (16^th Edition):

Borchers, Jeffrey G. “Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon.” 1990. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10183.

MLA Handbook (7^th Edition):

Borchers, Jeffrey G. “Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon.” 1990. Web. 08 Mar 2021.

Vancouver:

Borchers JG. Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 1990. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10183.

Council of Science Editors:

Borchers JG. Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon. [Doctoral Dissertation]. Oregon State University; 1990. Available from: http://hdl.handle.net/1957/10183

Oregon State University

17. Bork, Joyce L. Fire history in three vegetation types on the eastern side of the Oregon Cascades.

Degree: PhD, Forest Science, 1984, Oregon State University

URL: http://hdl.handle.net/1957/10122

► Historic fire return intervals in three different vegetation types dominated by ponderosa pine (Pinus ponderosa Laws.) were determined using fire scarred trees. Dendrochronological techniques were… (more)

Subjects/Keywords: Forest fires – Oregon – History

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APA (6^th Edition):

Bork, J. L. (1984). Fire history in three vegetation types on the eastern side of the Oregon Cascades. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/10122

Chicago Manual of Style (16^th Edition):

Bork, Joyce L. “Fire history in three vegetation types on the eastern side of the Oregon Cascades.” 1984. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10122.

MLA Handbook (7^th Edition):

Bork, Joyce L. “Fire history in three vegetation types on the eastern side of the Oregon Cascades.” 1984. Web. 08 Mar 2021.

Vancouver:

Bork JL. Fire history in three vegetation types on the eastern side of the Oregon Cascades. [Internet] [Doctoral dissertation]. Oregon State University; 1984. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10122.

Council of Science Editors:

Bork JL. Fire history in three vegetation types on the eastern side of the Oregon Cascades. [Doctoral Dissertation]. Oregon State University; 1984. Available from: http://hdl.handle.net/1957/10122

Oregon State University

18. Espinosa Bancalari, Miguel A. Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range.

Degree: PhD, Forest Science, 1985, Oregon State University

URL: http://hdl.handle.net/1957/10173

► In the Oregon Coast Range, total biomass and biomass increment, leaf area, the relationship between leaf area and sapwood area, and patterns of growth and… (more)

▼ In the Oregon Coast Range, total biomass and biomass increment, leaf area, the relationship between leaf area and sapwood area, and patterns of growth and form of individual trees, were studied in 40 Douglas-fir (Pseudotsuga menziesfi (Mirb.) Franco) trees from three adjacent 22 year-old plantations that had developed at different rates. The estimated total aboveground biomass in the three stands, designated as (1) "slow", (2) "medium", and (3) "fast", were 98.7, 148.2, and 203.7 t.ha-1, respectively, significantly different at the 95 percent level. Total belowground biomass was significantly higher for "fast" with 52.5 t.ha-1 versus 42.0 and 34.4 t.ha-1 for "medium" and "slow" stands. Total aboveground biomass increment was similar for "medium" and "fast" (12.6 and 12.3 t.ha-1yr-1) and was lower for "slow" (8.9 t.ha-1yr-1). Leaf area was significantly greater in "fast" than either of the other two stands. Sapwood area decreased with increasing height in the tree, with stands differing significantly only at breast height (bh). Leaf area to sapwood area ratios varied throughout the stem and were significantly higher for "fast"; the ratio was much lower at bh than at the base of the live crown. Diameter at bh (dbh) and sapwood at the crown base are both strong predictors of crown biomass components. For stem weight the addition of height to dbh reduced bias and increased the precision of estimates. Leaf area was as closely related to dbh as to bh sapwood area. Taking into account mean annual ring width in the sapwood did not improve the leaf area to sapwood area relationship. The results of the stem analysis indicated that growth differences among the stands appeared at a very early age. Differences among the stands in biomass, leaf area, and growth rate, which stem analysis shows to have appeared by at least age seven, may be related to differing soil characteristics. "Slow" soils are lower in nitrogen and phosphorous, and are waterlogged for part of the wet season. "Fast" and "medium" soils are similar to one another, except for a coarse textured C layer at shallower depth in "fast", which may have permitted more rapid root development and better access to water during dry periods. Advisors/Committee Members: Perry, David A. (advisor), Means, Joseph (committee member).

Subjects/Keywords: Douglas fir – Oregon – Growth – Case studies

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APA (6^th Edition):

Espinosa Bancalari, M. A. (1985). Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/10173

Chicago Manual of Style (16^th Edition):

Espinosa Bancalari, Miguel A. “Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range.” 1985. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10173.

MLA Handbook (7^th Edition):

Espinosa Bancalari, Miguel A. “Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range.” 1985. Web. 08 Mar 2021.

Vancouver:

Espinosa Bancalari MA. Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range. [Internet] [Doctoral dissertation]. Oregon State University; 1985. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10173.

Council of Science Editors:

Espinosa Bancalari MA. Growth and structure of three adjacent 22 year-old Douglas-fir stands in the Oregon Coast Range. [Doctoral Dissertation]. Oregon State University; 1985. Available from: http://hdl.handle.net/1957/10173

Oregon State University

19. Cummings, Dian Lyn. Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil.

Degree: MS, Forest Science, 1998, Oregon State University

URL: http://hdl.handle.net/1957/10522

► Tropical forests are of global importance with respect to their influence on biogeochemical cycles, climatic patterns, and as large reservoirs of biodiversity. Yet, few studies… (more)

▼ Tropical forests are of global importance with respect to their influence on biogeochemical cycles, climatic patterns, and as large reservoirs of biodiversity. Yet, few studies have quantified their structure, biomass, and carbon pools; basic information necessary to better understand the global function of tropical forests. The RADAMBRASIL project was conducted in the 1970's to inventory Brazil's natural resources. Describing a relationship between total aboveground biomass (TAGB) and the RADAMBRASIL forest inventories could add to the usefulness of RADAMBRASIL data base for the estimation of TAGB and carbon pools of the Amazon Basin. Our study quantified TAGB and forest structure of 20 undisturbed primary forest stands that were a part of Projeto RADAMBRASIL. This study was located in Rondonia, Brazil; an area in which a large portion of Amazonian deforestation occurred. TAGB ranged from 533 Mg ha-1 in a dense forest site to 288 Mg ha-1 in an open forest site with a mean TAGB of 341 Mg ha-1. TAGB and structure in each stand was described by partitioning and measuring the vegetation components. Non-tree components included palm, vines, litter, rootmat, and dead vegetation. The non-tree component of TAGB was highly variable (i.e.; 12% and 41%). We tested the hypothesis that there was a high correlation between these enumerated TAGB estimates from our study and predictive models that use commercial volumes from RADAMBRASIL to estimate TAGB (Fearnside, 1992 and Brown and Lugo 1992). No significant correlation was found between the modeled TAGB and the field measured TAG B. The Brown and Lugo model underestimated the mean for dense forests by > 1 00 Mg ha-1 (28%), conversely the Fearnside model overestimated the mean for open forests by > 100Mg ha-1(35%). No correlation was found between the TAGB estimates from this study and commercial volume reported in RADAMBRASIL, therefore no model was possible for TAGB based on commercial volume. Determining relationships between classifications from forest inventories and actual biomass data could improve models of global climate change and biogeochemical cycles. Given results from this study, current estimates of TAGB for Amazonian rainforests that are lower than 290 Mg ha-1 based upon forest inventories should be viewed with caution. Advisors/Committee Members: Perry, David A. (advisor), Garman, Steven (committee member).

Subjects/Keywords: Bioclimatology – Brazil

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APA (6^th Edition):

Cummings, D. L. (1998). Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/10522

Chicago Manual of Style (16^th Edition):

Cummings, Dian Lyn. “Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil.” 1998. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10522.

MLA Handbook (7^th Edition):

Cummings, Dian Lyn. “Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil.” 1998. Web. 08 Mar 2021.

Vancouver:

Cummings DL. Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil. [Internet] [Masters thesis]. Oregon State University; 1998. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10522.

Council of Science Editors:

Cummings DL. Total aboveground biomass and structure of tropical forest delineated by Projeto RADAMBRASIL in northern Rondonia, Brazil. [Masters Thesis]. Oregon State University; 1998. Available from: http://hdl.handle.net/1957/10522

Oregon State University

20. Fischer, Christine R. Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers.

Degree: MS, Forest Science, 1992, Oregon State University

URL: http://hdl.handle.net/1957/10590

► Mycorrhizae are important for plant growth, particularly in nutritionally poor soils. Vesicular-arbuscular mycorrhizae (VAM) are the primary form of mycorrhizae found in tropical plants, and… (more)

Subjects/Keywords: Vesicular-arbuscular mycorrhizas – Costa Rica

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APA (6^th Edition):

Fischer, C. R. (1992). Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/10590

Chicago Manual of Style (16^th Edition):

Fischer, Christine R. “Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers.” 1992. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10590.

MLA Handbook (7^th Edition):

Fischer, Christine R. “Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers.” 1992. Web. 08 Mar 2021.

Vancouver:

Fischer CR. Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers. [Internet] [Masters thesis]. Oregon State University; 1992. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10590.

Council of Science Editors:

Fischer CR. Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers. [Masters Thesis]. Oregon State University; 1992. Available from: http://hdl.handle.net/1957/10590

Oregon State University

21. Huang, Jing, 1964-. Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon.

Degree: PhD, Forest Science, 1998, Oregon State University

URL: http://hdl.handle.net/1957/10885

► Forest spatial pattern is a primary interest of landscape ecology due to the relationships between spatial configuration of biotic components and ecological processes. The spatial… (more)

▼ Forest spatial pattern is a primary interest of landscape ecology due to the relationships between spatial configuration of biotic components and ecological processes. The spatial pattern must be measured in meaningful ways so that relationships between forests and their environment can be analyzed. Aerial and satellite imageries provide ecologists a variety of scale choices at which the spatial information of forests can be presented in levels ranging form individual trees to landscapes. The high lava plain of central Oregon is characterized by young lava flows of moderate relief interrupted by scattered cinder cones and lava buttes. The regosolic soils developed on pumice support open coniferous forests of nationwide significance. The relationship between forests and the harsh rocky land has not been analyzed, yet large portions of the forest have been logged at various intensities over the last 40-50 years. A better understanding of the relationship between forests and environment is needed for management of healthy forest ecosystems. It is the intent of this study to use remotely sensed data to measure the spatial variability of forest patterns across the lava landscape in Mount Bachelor volcanic chain, and to analyze relationships between forest structural attributes and environmental variables. First, I used aerial photographs to characterize tree point pattern and measure canopy crown closure and density. A step-wise digital approach based on spatial, spectral, and topographic characteristics of the photographic data was developed to measure forest spatial patterns. The method provides a fast and accurate, yet low cost way to characterize tree point pattern and measure canopy crown closure and density. Second, I used Landsat TM imagery to estimate leaf area index (LAI). A new approach using multiple regression analysis was developed to overcome the saturation problems of commonly used vegetation indices at high LAT ranges and improve the performance of Landsat TM data in estimating LAI. Finally, I conducted an analysis using the spatial data developed in this study and supplemented with that obtained from Deschutes Nation Forest. The study documents methods of integrating multiple GIS data layers for spatial analysis and parameterizing relationships between forests and environment. Advisors/Committee Members: Perry, David A. (advisor), Chen, Chaur-Fong (committee member).

Subjects/Keywords: Forest dynamics – Oregon – Remote sensing

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APA (6^th Edition):

Huang, Jing, 1. (1998). Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/10885

Chicago Manual of Style (16^th Edition):

Huang, Jing, 1964-. “Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon.” 1998. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10885.

MLA Handbook (7^th Edition):

Huang, Jing, 1964-. “Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon.” 1998. Web. 08 Mar 2021.

Vancouver:

Huang, Jing 1. Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 1998. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10885.

Council of Science Editors:

Huang, Jing 1. Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon. [Doctoral Dissertation]. Oregon State University; 1998. Available from: http://hdl.handle.net/1957/10885

Oregon State University

22. Hutten, Martin A. B. Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas.

Degree: MS, Forest Science, 1998, Oregon State University

URL: http://hdl.handle.net/1957/10873

► The survival, growth, foliar nutrient status, ectomycorrhiza (EM) colonization, and associative N-fixation of ponderosa pine seedlings (Pinus ponderosa var. ponderosa Doug!. ex Laws.) were studied… (more)

▼ The survival, growth, foliar nutrient status, ectomycorrhiza (EM) colonization, and associative N-fixation of ponderosa pine seedlings (Pinus ponderosa var. ponderosa Doug!. ex Laws.) were studied under different gap sizes in forest canopy during the first growing season. Seedling performance variables were assessed relative to gap size of the forest canopy with and without a shrub removal and trenching treatment. Percent cover of shrubs and herbaceous plants, soil nutrient status, and soil moisture concentration were also determined. The study sites were located on forested lavas in central Oregon. Seedling survival in clearcut plots (5 7%) was much lower than in patch cut plots (94%) and undisturbed forest plots (97%), probably because of increased water stress in clearcuts. Soil moisture concentration within one month after planting had declined more rapidly in clearcuts, perhaps aggravated by the abundance of sedges in clearcut plots relative to other plots. Shoot dry weight of surviving seedlings was greatest in clearcut plots, intermediate in patch cut, and lowest in undisturbed forest plots. This probably reflects the availability of light and nitrogen. Foliar nitrogen concentration and content of seedlings in clearcut plots were higher than in patch cut and undisturbed forest plots. Graphical analyses of element composition in needles indicated that seedlings in clearcuts and undisturbed forest plots were nitrogen deficient, and seedlings in patch cuts were iron deficient. Thirty EM morphotypes were found on 108 seedlings. EM colonization and morphotype riclmess were greater in patch cut and undisturbed forest plots than in clearcut plots. The presence of active and seedling compatible EM fungi near established seedlings. Early EM colonization in patch cuts and forest plots may have increased seedling drought tolerance whereas delays in colonization may have aggravated seedling mortality in clearcut plots. EM colonization may have played a role in facilitating early seedling growth. Seedlings less than 15% colonized with EM did not grow well, and seedlings with the best growth performance were always greater than 50% colonized. Rates of associative N-fixation in seedling rhizospheres were greatest in forest, intermediate in patch cut, and lowest in clearcut plots. A shrub removal and trenching treatment increased seedling growth in clearcuts, patch cuts and undisturbed forest plots, probably by increasing the availability of soil moisture and nutrients. Seedling survival, EM variables, and associative N-fixation were not affected by the treatment. Advisors/Committee Members: Perry, David A. (advisor), Trappe, Jim (committee member).

Subjects/Keywords: Ponderosa pine – Seedlings – Ecophysiology – Oregon

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APA (6^th Edition):

Hutten, M. A. B. (1998). Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/10873

Chicago Manual of Style (16^th Edition):

Hutten, Martin A B. “Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas.” 1998. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/10873.

MLA Handbook (7^th Edition):

Hutten, Martin A B. “Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas.” 1998. Web. 08 Mar 2021.

Vancouver:

Hutten MAB. Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas. [Internet] [Masters thesis]. Oregon State University; 1998. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/10873.

Council of Science Editors:

Hutten MAB. Performance of Pinus ponderosa seedlings in clearcuts, patch cuts and undisturbed forests on lavas. [Masters Thesis]. Oregon State University; 1998. Available from: http://hdl.handle.net/1957/10873

Oregon State University

23. Smith, Jane E. (Jane Elizabeth). Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range.

Degree: MS, Forest Science, 1993, Oregon State University

URL: http://hdl.handle.net/1957/11102

► Seedlings of Gaultheria shallon, Pseudotsuga menziesii, Rhododendron macrophyllum and Tsuga heterophylla were grown together in the greenhouse in soils from three young managed Douglas-fir forests… (more)

Subjects/Keywords: Ectomycorrhizas – Oregon

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APA (6^th Edition):

Smith, J. E. (. E. (1993). Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11102

Chicago Manual of Style (16^th Edition):

Smith, Jane E (Jane Elizabeth). “Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range.” 1993. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11102.

MLA Handbook (7^th Edition):

Smith, Jane E (Jane Elizabeth). “Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range.” 1993. Web. 08 Mar 2021.

Vancouver:

Smith JE(E. Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11102.

Council of Science Editors:

Smith JE(E. Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/11102

Oregon State University

24. Volk, John. The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites.

Degree: MS, Forest Science, 1990, Oregon State University

URL: http://hdl.handle.net/1957/11197

► Miombo woodland and dambo grassland soils were selected to study the effect of soil transfer on early growth of B. petersiana, C. spectabilis, and C.… (more)

Subjects/Keywords: Agroforestry – Zambia

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APA (6^th Edition):

Volk, J. (1990). The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11197

Chicago Manual of Style (16^th Edition):

Volk, John. “The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites.” 1990. Masters Thesis, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/11197.

MLA Handbook (7^th Edition):

Volk, John. “The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites.” 1990. Web. 08 Mar 2021.

Vancouver:

Volk J. The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites. [Internet] [Masters thesis]. Oregon State University; 1990. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/11197.

Council of Science Editors:

Volk J. The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites. [Masters Thesis]. Oregon State University; 1990. Available from: http://hdl.handle.net/1957/11197

Oregon State University

25. Halaj, Juraj. Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition.

Degree: PhD, Entomology, 1996, Oregon State University

URL: http://hdl.handle.net/1957/34526

► This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition… (more)

▼ This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition of arboreal spiders in western Oregon. In 1993, I compared the spider communities of several host-tree species which have different branch structure. I also assessed the importance of several habitat variables as predictors of spider abundance and diversity on and among individual tree species. The greatest abundance and species richness of spiders per 1-m-long branch tips were found on structurally more complex tree species, including Douglas-fir, Pseudotsuga menziesii (Mirbel) Franco and noble fir, Abies procera Rehder. Spider densities, species richness and diversity positively correlated with the amount of foliage, branch twigs and prey densities on individual tree species. The amount of branch twigs alone explained almost 70% of the variation in the total spider abundance across five tree species. In 1994, I experimentally tested the importance of needle density and branching complexity of Douglas-fir branches on the abundance and community structure of spiders and their potential prey organisms. This was accomplished by either removing needles, by thinning branches or by tying branches. Tying branches resulted in a significant increase in the abundance of spiders and their prey. Densities of spiders and their prey were reduced by removal of needles and thinning. The spider community of needle-sparse branches was dominated by orb weavers (Araneidae), whereas tied branches were preferably colonized by sheet-web weavers (Linyphiidae and Micryphantidae), and nocturnal hunting spiders (Anyphaeilidae and Clubionidae). Spider species richness and diversity increased in structurally more complex habitats. In 1994 and 1995, I excluded foraging Camponotus spp. ants from canopies of sapling Douglas-fir. Biomass of potential prey organisms, dominated by Psocoptera, increased significantly by 1.9 to 2.4-fold on the foliage following ant exclusion. Hunting spiders, dominated by the Salticidae, increased significantly by 1.5 to 1.8-fold in trees without ants in the late summer. The exclusion of ants did not affect the abundance of web-building spiders. Documented aggressive behavior of aphid-tending ants suggests interference competition between hunting spiders and ants. Advisors/Committee Members: Lattin, John D. (advisor), Perry, David A. (committee member).

Subjects/Keywords: Spiders – Ecology – Oregon

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APA (6^th Edition):

Halaj, J. (1996). Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/34526

Chicago Manual of Style (16^th Edition):

Halaj, Juraj. “Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition.” 1996. Doctoral Dissertation, Oregon State University. Accessed March 08, 2021. http://hdl.handle.net/1957/34526.

MLA Handbook (7^th Edition):

Halaj, Juraj. “Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition.” 1996. Web. 08 Mar 2021.

Vancouver:

Halaj J. Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition. [Internet] [Doctoral dissertation]. Oregon State University; 1996. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1957/34526.

Council of Science Editors:

Halaj J. Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition. [Doctoral Dissertation]. Oregon State University; 1996. Available from: http://hdl.handle.net/1957/34526

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