English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/122404
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Quantitative characterization of the regressive ecological succession by fractal analysis of plant spatial patterns

AutorAlados, Concepción L. ; Pueyo, Yolanda ; Giner, M. L.; Navarro, Teresa ; Escós, J. ; Barroso, F. G.; Cabezudo, B. ; Emlen, J. M.
Palabras claveFractal analysis
Plant spatial patterns
Ecological succession
Grazing pressure
Semi-arid Mediterranean ecosystems
Fecha de publicaciónmay-2003
EditorElsevier
CitaciónEcological Modelling 163(1-2): 1-17 (2003)
ResumenWe studied the effect of grazing on the degree of regression of successional vegetation dynamic in a semi-arid Mediterranean matorral. We quantified the spatial distribution patterns of the vegetation by fractal analyses, using the fractal information dimension and spatial autocorrelation measured by detrended fluctuation analyses (DFA). It is the first time that fractal analysis of plant spatial patterns has been used to characterize the regressive ecological succession. Plant spatial patterns were compared over a long-term grazing gradient (low, medium and heavy grazing pressure) and on ungrazed sites for two different plant communities: A middle dense matorral of Chamaerops and Periploca at Sabinar-Romeral and a middle dense matorral of Chamaerops, Rhamnus and Ulex at Requena-Montano. The two communities differed also in the microclimatic characteristics (sea oriented at the Sabinar-Romeral site and inland oriented at the Requena-Montano site). The information fractal dimension increased as we moved from a middle dense matorral to discontinuous and scattered matorral and, finally to the late regressive succession, at Stipa steppe stage. At this stage a drastic change in the fractal dimension revealed a change in the vegetation structure, accurately indicating end successional vegetation stages. Long-term correlation analysis (DFA) revealed that an increase in grazing pressure leads to unpredictability (randomness) in species distributions, a reduction in diversity, and an increase in cover of the regressive successional species, e.g. Stipa tenacissima L. These comparisons provide a quantitative characterization of the successional dynamic of plant spatial patterns in response to grazing perturbation gradient.
Versión del editorhttp://dx.doi.org/10.1016/S0304-3800(02)00294-6
URIhttp://hdl.handle.net/10261/122404
DOI10.1016/S0304-3800(02)00294-6
ISSN0304-3800
Aparece en las colecciones: (IPE) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.