Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/108135
Título: | The shift from plant-plant facilitation to competition under severe water deficit is spatially explicit | Autor: | O'Brien, Michael J Pugnaire, Francisco I Armas, Cristina Rodríguez-Echeverría, Susana Schöb, Christian |
Palavras-chave: | biodiversity; competition; plant community diversity; plant–climate interactions; spatial variability; stress-gradient hypothesis; water limitation | Data: | Abr-2017 | Editora: | Wiley-Blackwell | Projeto: | Consejo Superior de Investigaciones Científicas by MINECO, Grant/Award Number: CGL2014-59010-R; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Grant/Award Number: P2ZHP3_161986, P300PA_167758, PBBEP3_128361 and PZ00P3_148261; Spanish Government, Grant/Award Number: RYC-2012-12277; MINECO | Título da revista, periódico, livro ou evento: | Ecology and Evolution | Volume: | 7 | Número: | 7 | Resumo: | The stress-gradient hypothesis predicts a higher frequency of facilitative interactions as resource limitation increases. Under severe resource limitation, it has been suggested that facilitation may revert to competition, and identifying the presence as well as determining the magnitude of this shift is important for predicting the effect of climate change on biodiversity and plant community dynamics. In this study, we perform a meta-analysis to compare temporal differences of species diversity and productivity under a nurse plant (Retama sphaerocarpa) with varying annual rainfall quantity to test the effect of water limitation on facilitation. Furthermore, we assess spatial differences in the herbaceous community under nurse plants in situ during a year with below-average rainfall. We found evidence that severe rainfall deficit reduced species diversity and plant productivity under nurse plants relative to open areas. Our results indicate that the switch from facilitation to competition in response to rainfall quantity is nonlinear. The magnitude of this switch depended on the aspect around the nurse plant. Hotter south aspects under nurse plants resulted in negative effects on beneficiary species, while the north aspect still showed facilitation. Combined, these results emphasize the importance of spatial heterogeneity under nurse plants for mediating species loss under reduced precipitation, as predicted by future climate change scenarios. However, the decreased water availability expected under climate change will likely reduce overall facilitation and limit the role of nurse plants as refugia, amplifying biodiversity loss. | URI: | https://hdl.handle.net/10316/108135 | ISSN: | 2045-7758 | DOI: | 10.1002/ece3.2875 | Direitos: | openAccess |
Aparece nas coleções: | I&D CFE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
The shift from plant–plant facilitation to competition under severe water deficit is spatially explicit.pdf | 749.94 kB | Adobe PDF | Ver/Abrir |
Visualizações de página
30
Visto em 8/mai/2024
Downloads
13
Visto em 8/mai/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Este registo está protegido por Licença Creative Commons