Climate mediates the biodiversity-ecosystem stability relationship globally.

Autor:	García-Palacios P; Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, 28933 Móstoles, Spain; pablo.garcia.pala@gmail.com., Gross N; Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, 28933 Móstoles, Spain.; Institut National de la Recherche Agronomique, USC1339 Chizé (Centre d'Études Biologiques de Chizé), F-79360 Villiers en Bois, France.; Centre d'Études Biologiques de Chizé, CNRS-Université La Rochelle (UMR 7372), F-79360 Villiers en Bois, France., Gaitán J; Instituto de Suelos, Centro de Investigación en Recursos Naturales, Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y de los Reseros, 1686 Hurlingham, Argentina.; Departamento de Tecnología, Universidad Nacional de Luján, 6700 Luján, Argentina., Maestre FT; Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, 28933 Móstoles, Spain.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2018 Aug 14; Vol. 115 (33), pp. 8400-8405. Date of Electronic Publication: 2018 Jul 30.
DOI:	10.1073/pnas.1800425115
Abstrakt:	The insurance hypothesis, stating that biodiversity can increase ecosystem stability, has received wide research and political attention. Recent experiments suggest that climate change can impact how plant diversity influences ecosystem stability, but most evidence of the biodiversity-stability relationship obtained to date comes from local studies performed under a limited set of climatic conditions. Here, we investigate how climate mediates the relationships between plant (taxonomical and functional) diversity and ecosystem stability across the globe. To do so, we coupled 14 years of temporal remote sensing measurements of plant biomass with field surveys of diversity in 123 dryland ecosystems from all continents except Antarctica. Across a wide range of climatic and soil conditions, plant species pools, and locations, we were able to explain 73% of variation in ecosystem stability, measured as the ratio of the temporal mean biomass to the SD. The positive role of plant diversity on ecosystem stability was as important as that of climatic and soil factors. However, we also found a strong climate dependency of the biodiversity-ecosystem stability relationship across our global aridity gradient. Our findings suggest that the diversity of leaf traits may drive ecosystem stability at low aridity levels, whereas species richness may have a greater stabilizing role under the most arid conditions evaluated. Our study highlights that to minimize variations in the temporal delivery of ecosystem services related to plant biomass, functional and taxonomic plant diversity should be particularly promoted under low and high aridity conditions, respectively. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
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