Water availability and species identity control shrub colonization in abandoned semiarid steppes
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http://hdl.handle.net/10045/63196
Títol: | Water availability and species identity control shrub colonization in abandoned semiarid steppes |
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Autors: | Rolo, Víctor | Amat Martínez, Beatriz | Cortina, Jordi |
Grups d'investigació o GITE: | Gestión de Ecosistemas y de la Biodiversidad (GEB) |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Ecología | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef" |
Paraules clau: | Shrub encroachment | Long-term plant dynamics | Aerial photography | Standardize precipitation index | Drylands | Stipa tenacissima |
Àrees de coneixement: | Ecología |
Data de publicació: | 15-de juliol-2016 |
Editor: | Elsevier |
Citació bibliogràfica: | Agriculture, Ecosystems & Environment. 2016, 228: 62-69. doi:10.1016/j.agee.2016.05.014 |
Resum: | The increase in shrub cover and density is a widespread phenomenon in drylands worldwide. Its causes and consequences are complex and strongly idiosyncratic. Detailed knowledge of the rate of shrub colonization, and its abiotic and biotic drivers is crucial to fully understand and manage these areas. We used a set of aerial photographs (1956, 1978, 1985, 1998 and 2009) and field data to relate shrub patch dynamics, and abiotic and biotic properties of 27 abandoned steppes in SE Iberian Peninsula. Shrub patch density in 2009 ranged from 11 to 143 patches ha−1, and increased by an average of ∼180% between 1956 and 2009. Temporal changes in shrub patch density followed non-linear functions (monomolecular, logistic and exponential) describing early, gradual and late recruitment, respectively. Differences in shrub patch colonization rate were related to the identity of patch-forming species, but contingent on water availability. Total increases in shrub patch density were larger when patches were dominated by late colonizer species. Overall shrub patch dynamics was mostly related to the identity of patch-forming species and climatic conditions, and to a lesser extent physical factors such as aspect and rock cover. Given the sensitivity of patch-forming species to climatic conditions, new challenges for steppe management will emerge over the next decades. Species able to thrive under harsh conditions may increase their dominance at the expense of species adapted to less demanding conditions. |
Patrocinadors: | The project was financially supported by the Spanish Ministry of Education and Competitiveness (project UNCROACH, CGL2011-30581-C02-01). VR was supported by a postdoctoral grant from the OP Education for Competitiveness (European Social Fund and Czech Republic Ministry of Education and Youth CZ.1.07/2.3.00/30.0017) and by the National Research Foundation (South Africa). BA was supported by an FPU fellowship from the Spanish Ministry of Science and Innovation. |
URI: | http://hdl.handle.net/10045/63196 |
ISSN: | 0167-8809 (Print) | 1873-2305 (Online) |
DOI: | 10.1016/j.agee.2016.05.014 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2016 Elsevier B.V. |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1016/j.agee.2016.05.014 |
Apareix a la col·lecció: | INV - GEB - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2016_Rolo_etal_AGEE_final.pdf | Versión final (acceso restringido) | 740,37 kB | Adobe PDF | Obrir Sol·licitar una còpia |
2016_Rolo_etal_AGEE_preprint.pdf | Preprint (acceso abierto) | 552,9 kB | Adobe PDF | Obrir Vista prèvia |
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