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Universidade Federal de Santa Maria

1. Duilio Guerra Bandinelli. DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS.

Degree: 2008, Universidade Federal de Santa Maria

The development of economically viable production systems, which can make compatible good beef cattle profit and the preservation of natural grassland ecosystems, should be supported by knowledge of dynamic of vegetation that occur after some management practices. Vegetation dynamic studies show the existence of populations replacement processes which can be observed in space and time, in different scales. Modeling these systems would be one alternative to achieve this premise. To achieve this purpose, this thesis, is divided in two chapters. In the are presented, respectively, temporal dynamics of grasslands vegetation, based on species composition (taxons) or Plants Functional Types (PFT) groups. These were based on the traits: Specific Leaf Area (SLA) e Leaf Dry Matter Content (LDM), which grouped Poaceae family species in four groups (A, B, C and D). Data used in this thesis came from vegetation relévés from 1995 to 2001, and data predict by Markov chains. Typical disturbance factors of grassland vegetation, grazing and burning, and their interactions, combined with relief position, express the scenarios which should be modeled along the time. Results obtained by using ordination and randomization analysis show that is possible using this tool to build up predictive models of vegetation composition in grassland areas, independently from the evaluation being based on taxons or PFT. When it was based in taxons, a certain degree of imprecision in the estimation of forage mass of species with a low initial contribution. Grazing and relief position were determinant of ordination trajectory, and that was not possible to identify in burning. When based in PFTs, results obtained from model validation, from ordination analysis and from randomization tests, showed a tendency of trajectories and of predicted values of functional groups, which is more suitable for plots under grazing. Using this model, as a management tool for areas under grazing, is in dependence of new validation researches, using new data, but for this is necessary to make strong the exchange of informations among research groups in this area.

O desenvolvimento de sistemas de produção viáveis economicamente, que tornem compatíveis bons ganhos animais com a preservação dos ecossistemas de pastagens naturais, deve ser apoiado pelo conhecimento da dinâmica da vegetação que ocorre após determinadas práticas de manejo. Estudos de dinâmica da vegetação revelam processos de substituição de populações, que podem ser observados no espaço e no tempo, em diferentes escalas. A modelagem destes sistemas pode representar uma alternativa para revelar esses processos. Deste modo, a presente tese, está dividida em dois capítulos, sendo abordadas, respectivamente, as dinâmicas temporais da vegetação, baseadas na composição de espécies da área (Táxons) ou dos grupos de Tipos Funcionais de Plantas (TFP). Estes foram baseados nos atributos Área Foliar Específica (AFE) e Teor de Matéria Seca Foliar (TMS), os quais agruparam as espécies pertencentes à família Poaceae, em…

Advisors/Committee Members: Fernando Luiz Ferreira de Quadros, Vicente Celestino Pires Silveira, Marta Gomes da Rocha, José Pedro Pereira Trindade, Julio Viegas.

Subjects/Keywords: tipos funcionais de plantas; pastejo; gramíneas; fogo; cadeias de Markov; ZOOTECNIA; fire; grasses; grazing; Markov chains; plants functional types

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bandinelli, D. G. (2008). DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS. (Thesis). Universidade Federal de Santa Maria. Retrieved from http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2082

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bandinelli, Duilio Guerra. “DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS.” 2008. Thesis, Universidade Federal de Santa Maria. Accessed August 21, 2019. http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2082.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bandinelli, Duilio Guerra. “DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS.” 2008. Web. 21 Aug 2019.

Vancouver:

Bandinelli DG. DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS. [Internet] [Thesis]. Universidade Federal de Santa Maria; 2008. [cited 2019 Aug 21]. Available from: http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2082.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bandinelli DG. DINÂMICA E MODELAGEM TEMPORAL DE VEGETAÇÃO CAMPESTRE SOB DISTÚRBIOS. [Thesis]. Universidade Federal de Santa Maria; 2008. Available from: http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2082

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Virginia Tech

2. Call, Lara J. Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.).

Degree: MS, Biology, 2002, Virginia Tech

Invasive exotic plants can persist and successfully spread within ecosystems and negatively affect the recruitment of native species. The exotic invasive Ailanthus altissima and the native Robinia pseudoacacia are frequently found in disturbed sites and exhibit similar growth and reproductive characteristics, yet each has distinct functional roles such as allelopathy and nitrogen fixation, respectively. 1) A four-month full additive series in the greenhouse and 2) spatial point pattern analysis of trees in a silvicultural experiment were used to analyze the intraspecific and interspecific interference between these two species. In the greenhouse experiment, total biomass responses per plant for both species were significantly affected by interspecific but not by intraspecific interference (p <0.05). Competition indices such as Relative Yield Total and Relative Crowding Coefficient suggested that A. altissima was the better competitor in mixed plantings. Ailanthus altissima consistently produced a larger above ground and below ground relative yield while R. pseudoacacia generated a larger aboveground relative yield in high density mixed species pots. However, R. pseudoacacia exhibited more variation for multiple biomass traits, occasionally giving it an above ground advantage in some mixed species pots. Analysis of spatial point patterns in the field with Ripley's K indicated that the two species were positively associated with each other along highly disturbed skid trails in the majority of the field sites. Locally, increased disturbances could lead to more opportunities for A. altissima to invade, negatively interact with R. pseudoacacia (as was evident in the greenhouse study), and become established in place of native species. Advisors/Committee Members: Nilsen, Erik T. (committeechair), Jones, Robert H. (committee member), Porter, Duncan M. (committee member).

Subjects/Keywords: Ripley's K statistic; De Wit replacement; full additive design; spatial point patterns; invasive plants; plant competition; functional types; plant interference

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Call, L. J. (2002). Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.). (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/32845

Chicago Manual of Style (16th Edition):

Call, Lara J. “Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.).” 2002. Masters Thesis, Virginia Tech. Accessed August 21, 2019. http://hdl.handle.net/10919/32845.

MLA Handbook (7th Edition):

Call, Lara J. “Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.).” 2002. Web. 21 Aug 2019.

Vancouver:

Call LJ. Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.). [Internet] [Masters thesis]. Virginia Tech; 2002. [cited 2019 Aug 21]. Available from: http://hdl.handle.net/10919/32845.

Council of Science Editors:

Call LJ. Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.). [Masters Thesis]. Virginia Tech; 2002. Available from: http://hdl.handle.net/10919/32845

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