Modelling competitive ability of Neotropical savanna grasses: Simulation of shading and drought impacts on biomass production
Empreu sempre aquest identificador per citar o enllaçar aquest ítem
http://hdl.handle.net/10045/38982
Títol: | Modelling competitive ability of Neotropical savanna grasses: Simulation of shading and drought impacts on biomass production |
---|---|
Autors: | Segarra Berenguer, José Gabriel | Raventós, José | Acevedo, Miguel F. | Silva, Juan F. | García Núñez, Carlos |
Grups d'investigació o GITE: | Gestión de Ecosistemas y de la Biodiversidad (GEB) |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Ecología |
Paraules clau: | Biomass | Drought | Grasses | Convolution | Transition matrix | Evapotranspiration |
Àrees de coneixement: | Ecología |
Data de publicació: | de gener-2013 |
Editor: | Elsevier |
Citació bibliogràfica: | Ecological Informatics. 2013, 13: 57-69. doi:10.1016/j.ecoinf.2012.10.003 |
Resum: | In this paper, we develop a technique to model the spatial distribution of shoots along vertical and horizontal dimensions of a plant community. We use it to simulate the growth of a tropical savanna near the city of Barinas, Venezuela, to explore the responses of the peak biomass of a plant community to a range of 10-50% reduction of rainfall. We selected three dominant grass species: Elyonurus adustus, Leptocoryphium lanatum, and Andropogon semiberbis in a 4 × 7 m study plot. We estimate parameters values from data measured in the field. The number of shoots for each plant is obtained according to soil water availability and distributed vertically by 10 cm levels using a transition matrix. Convolution allows calculation of leaf area index for each cell and vertical level, which is then used to calculate light attenuation and thus the proportion of shaded shoots in each cell and level. With this information, maximum evapotranspiration is determined to calculate soil moisture using daily rain time series. Biomass is calculated for all species based on shoot biomass measured in the field and fire is simulated by removing a fraction of the shoots segments of all species. Modeled biomass fits reasonably well to field data. |
Patrocinadors: | We thank the Spanish Ministry of Education and Science (CGL2007-65315-C03 02; CGL2008-05112-C02-01/CLI) and GA-LC-031/2010 funded by CGA-La Caixa for their financial assistance. |
URI: | http://hdl.handle.net/10045/38982 |
ISSN: | 1574-9541 (Print) | 1878-0512 (Online) |
DOI: | 10.1016/j.ecoinf.2012.10.003 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1016/j.ecoinf.2012.10.003 |
Apareix a la col·lecció: | INV - GEB - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
---|---|---|---|---|
2013_Segarra_etal_EI_final.pdf | Versión final (acceso restringido) | 1,03 MB | Adobe PDF | Obrir Sol·licitar una còpia |
Tots els documents dipositats a RUA estan protegits per drets d'autors. Alguns drets reservats.