Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/116298
COMPARTIR / EXPORTAR:
SHARE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Exploring the tug of war between positive and negative interactions among savanna trees: Competition, dispersal, and protection from fire |
Autor: | Bacelar, Flora S. CSIC; Calabrese, Justin; Hernández-García, Emilio CSIC ORCID | Palabras clave: | Tree–grass equilibrium Tree–tree competition Individual based model Clustering Fire-spread model Savanna |
Fecha de publicación: | mar-2014 | Editor: | Elsevier | Citación: | Ecological Complexity 17: 140-148 (2014) | Resumen: | Savannas are characterized by a discontinuous tree layer superimposed on a continuous layer of grass. Identifying the mechanisms that facilitate this tree-grass coexistence has remained a persistent challenge in ecology and is known as the "savanna problem". In this work, we propose a model that combines a previous savanna model Calabrese et al., 2010, which includes competitive interactions among trees and dispersal, with the Drossel-Schwabl forest fire model, therefore representing fire in a spatially explicit manner. The model is used to explore how the pattern of fire-spread, coupled with an explicit, fire-vulnerable tree life stage, affects tree density and spatial pattern. Tree density depends strongly on both fire frequency and tree-tree competition although the fire frequency, which induces indirect interactions between trees and between trees and grass, appears to be the crucial factor controlling the tree-extinction transition in which the savanna becomes grassland. Depending on parameters, adult trees may arrange in different regular or clumped patterns, the later of two different types (compact or open). Cluster-size distributions have fat tails but clean power-law behavior is only attained in specific cases. © 2013 Elsevier B.V. | Descripción: | arXiv:1304.6623 | Versión del editor: | http://dx.doi.org/10.1016/j.ecocom.2013.11.007 | URI: | http://hdl.handle.net/10261/116298 | DOI: | 10.1016/j.ecocom.2013.11.007 | Identificadores: | doi: 10.1016/j.ecocom.2013.11.007 issn: 1476-945X |
Aparece en las colecciones: | (IFISC) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
exploring_tug_war_Bacelar.pdf | 727,56 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
Page view(s)
319
checked on 23-abr-2024
Download(s)
219
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.