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http://hdl.handle.net/10261/122404
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Alados, Concepción L. | es_ES |
dc.contributor.author | Pueyo, Yolanda | es_ES |
dc.contributor.author | Giner, María de la Luz | es_ES |
dc.contributor.author | Navarro, Teresa | es_ES |
dc.contributor.author | Escós, J. | es_ES |
dc.contributor.author | Barroso, F. G. | es_ES |
dc.contributor.author | Cabezudo, B. | es_ES |
dc.contributor.author | Emlen, J. M. | es_ES |
dc.date.issued | 2003-05 | - |
dc.identifier.citation | Ecological Modelling 163(1-2): 1-17 (2003) | es_ES |
dc.identifier.issn | 0304-3800 | - |
dc.identifier.uri | http://hdl.handle.net/10261/122404 | - |
dc.description.abstract | We 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. | es_ES |
dc.description.sponsorship | The work was supported by the EU under its INCO-DC Program, contract number ERBIC18-CT98-0392: DRASME (Desertification risk Assessment in Silvopastoral Mediterranean Ecosystems) and by Spanish CICYT program, project number AMB1998-1017 (Evaluación de la presión ganadera para la conservación de las estepas y matorrales Mediterráneos,). The support from both programs is gratefully acknowledged. We are grateful to David Navas and Antonio Gonzalez, who undertook the taxonomic identification of each species, for which we are very grateful. Several persons have collaborated with us during the data collection. We thank Agustı́n Muñoz, Rosa Jimenez and Antonio Parra for collaborating with us in the collection and measurement of data. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | closedAccess | es_ES |
dc.subject | Fractal analysis | es_ES |
dc.subject | Plant spatial patterns | es_ES |
dc.subject | Ecological succession | es_ES |
dc.subject | Grazing pressure | es_ES |
dc.subject | Semi-arid Mediterranean ecosystems | es_ES |
dc.title | Quantitative characterization of the regressive ecological succession by fractal analysis of plant spatial patterns | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/S0304-3800(02)00294-6 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/S0304-3800(02)00294-6 | es_ES |
dc.relation.csic | Sí | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
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