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1. Berenguer Bodí, Mercedes. Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems.

Degree: 2018, TDX

Fire is a natural phenomenon that has affected the Earth’s land surface to varying degree over the last 400 millions years. Under the climatic conditions of the Mediterranean, fire has been a recurrent component that human societies have controlled since millennia. Recently, however, following 50 years of rural depopulation, land management using fire has largely disappeared here and with forest regrowth, fire now affects a dense and often contiguous biomass. Wildfire in the Mediterranean has thus become a risk due to its high intensity and the difficulty in controlling it. It is particularly the intense, uncontrolled fires which can result in adverse environmental effects, modifying soil properties, promoting high erosion rates and hence desertification. In addition, fire endangers properties and human lives. This PhD thesis addresses some environmental aspects of wildfire with special consideration of its effects on soils. The study of the environmental aspect presented here together with social and economic studies will allow a better management of fire-affected areas and the regional planning. Fire can result in changes in vegetation, micro and macro fauna, biochemical cycles, soil properties, and hydrological and geomorphological processes due to the heat input, but also due to the environmental conditions after the loss of vegetation and the added cover with ash. Wildfire produces a sudden transformation to the characteristics and functioning of the ecosystem, and leaves an influence that can affect it for years in a very dynamic and variable way depending on multiple factors. Ash is one of the key elements affecting burned areas. In the context of this study, ash is the residue of the organic material after the fire and blankets the soil temporally with a layer of variable thickness, physical and chemical properties, which depend on fuel characteristics and fire severity. It is of major importance for the biogeochemical cycles, including the carbon cycle. It modifies soil infiltration and runoff generation, affects erosion rates, and changes physical and chemical soil properties. Even after being removed from the soil surface by slope wash, wind erosion or dissolution, ash may still affect the matter and energy cycles, and can modify the properties of soils if incorporated. Despite its implications, ash has not seen much attention in the scientific studies of wildfire and it remains one of the least understood elements of the post-fire ecosystem. In contrast, changes in soil organic matter and soil aggregation, runoff and erosion, and the recovery of vegetation, have been intensively and repeatedly studied. To date, ash has been considered largely only as an important element in the nutrient cycle and as a soil fertiliser. Very few studies have explored ash effects on soil hydrology and erosion, and from the research to date, few definitive conclusions have been obtained. What we do know now is that ash properties are very variable, which results in different and sometimes contrasting effects. The general… Advisors/Committee Members: Doerr, Stefan H., Cerdà Bolinches, Artemi, Mataix-Solera, Jorge, Departament de Geografia.

Subjects/Keywords: cenizas; hidrofobicidad; incendios forestales; hidrología; erosión; ecosistemas mediterraneos; UNESCO::GEOGRAFÍA; UNESCO::CIENCIAS DE LA TIERRA Y DEL ESPACIO

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APA (6th Edition):

Berenguer Bodí, M. (2018). Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems. (Thesis). TDX. Retrieved from http://hdl.handle.net/10803/568007

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):

Berenguer Bodí, Mercedes. “Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems.” 2018. Thesis, TDX. Accessed December 11, 2019. http://hdl.handle.net/10803/568007.

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

MLA Handbook (7th Edition):

Berenguer Bodí, Mercedes. “Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems.” 2018. Web. 11 Dec 2019.

Vancouver:

Berenguer Bodí M. Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems. [Internet] [Thesis]. TDX; 2018. [cited 2019 Dec 11]. Available from: http://hdl.handle.net/10803/568007.

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

Council of Science Editors:

Berenguer Bodí M. Efectos de las cenizas y la repelencia al agua en suelos afectados por incendios forestales en ecosistemas mediterráneos = Ash and water repellency efects on soil hydrology in fire-afected Mediterranean ecosystems. [Thesis]. TDX; 2018. Available from: http://hdl.handle.net/10803/568007

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

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