Functional redundancy dampens precipitation change impacts on species-rich invertebrate communities across the Neotropics
Type | Article | ||||||||||||
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Date | 2022-07 | ||||||||||||
Language | English | ||||||||||||
Author(s) | Cereghino Regis1, Trzcinski Mark Kurtis2, Macdonald A. Andrew M.3, 4, Marino Nicholas A. C.5, 6, Acosta Mercado Dimaris7, Leroy Celine8, 9, Corbara Bruno10, Romero Gustavo Q.11, Farjalla Vinicius F., Barberis Ignacio M.12, Dezerald Olivier13, Hammill Edd14, Atwood Trisha B.14, Piccoli Gustavo C. O.15, Ospina Bautista Fabiola16, Carrias Jean-Francois10, Leal Juliana S.5, Montero Guillermo12, Antiqueira Pablo A. P.11, Freire Rodrigo12, Realpe Emilio16, Amundrud Sarah L.17, de Omena Paula M.11, Campos Alice B. A.5, Srivastava Diane S.17 | ||||||||||||
Affiliation(s) | 1 : Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France 2 : Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, Canada 3 : Quebec Centre for Biodiversity Science, Montreal, QC, Canada 4 : Centre for the Synthesis and Analysis of Biodiversity (CESAB-FRB), Aix-en- Provence, France; 5 : Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil 6 : Departamento de Ecologia, Instituto de Biologia, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil 7 : Department of Biology, University of Puerto Rico -Mayagüez Campus, Mayagüez, Puerto Rico, USA 8 : AMAP, University of Montpellier, CIRAD, CNRS, INRA, IRD, Montpellier, France 9 : ECOFOG, CIRAD, CNRS, INRAE, AgroParisTech, Université de Guyane, Université des Antilles, Kourou, France 10 : Université Clermont-Auvergne, CNRS, LMGE (Laboratoire Microorganismes: Génome et Environnement), Clermont-Ferrand, France; 11 : Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil 12 : Facultad de Ciencias Agrarias, Instituto de Investigaciones en Ciencias Agrarias de Rosario, IICAR-CONICET- UNR, Universidad Nacional de Rosario, Zavalla, Argentina 13 : UMR ESE, Ecology and Ecosystem Health, INRAE, Agrocampus Ouest, Rennes, France 14 : Department of Watershed Sciences and the Ecology Center, Utah State University, Logan, USA 15 : Department of Zoology and Botany, University of São Paulo State (UNESP/IBILCE), São José do Rio Preto, Brazil 16 : Departamento de Ciencias Biológicas, Universidad de Caldas, Manizales, Colombia 17 : Department of Zoology & Biodiversity Research Centre, University of British Columbia, Vancouver, Canada |
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Source | Functional Ecology (0269-8463) (Wiley), 2022-07 , Vol. 36 , N. 7 , P. 1559-1572 | ||||||||||||
DOI | 10.1111/1365-2435.14048 | ||||||||||||
WOS© Times Cited | 1 | ||||||||||||
Keyword(s) | freshwater, functional traits, hydrology, insurance hypothesis, precipitation, species richness | ||||||||||||
Abstract | Animal community responses to extreme climate events can be predicted from the functional traits represented within communities. However, it is unclear whether geographic variation in the response of functional community structure to climate change is primarily driven by physiological matching to local conditions (local adaptation hypothesis) or by differences between species pools in functional redundancy (insurance hypothesis). We conducted a coordinated experiment to understand how aquatic invertebrate traits mediate the responses of multitrophic communities to changes in the quantity and evenness of rainfall in 180 natural freshwater microcosms (tank bromeliads) distributed across six sites from 18 degrees N in the Caribbean to 29 degrees S in South America. At each site, we manipulated the mean and dispersion of the daily amount of rainfall that entered tank bromeliads over a 2-month period. Manipulations covered a response surface representing 50% to 200% of the dispersion of daily rainfall crossed with 10% to 300% of the mean amounts of rainfall. The response of functional community structure to precipitation regimes differed across sites. These geographic differences were not consistent with the local adaptation hypothesis, as responses did not correlate with the current amplitude in precipitation. Geographic differences in community responses were consistent with the insurance hypothesis: sites with the lowest functional redundancy in their species pools had the strongest response to a gradient in hydrological variability induced by uneven precipitation. In such sites, an increase in the hydrologic variability induced a shift from communities with both pelagic and benthic traits using both green and brown energy channels to strictly benthic, brown energy communities. Our results predict uneven impacts of precipitation change on community structure and energy channels within communities across Neotropical regions. This geographic variation is due more to differences in the size and redundancy of species pools than to local adaptation. Strategies for climate change adaptation should thus seek to identify and preserve functionally unique species and their habitats. Read the free Plain Language Summary for this article on the Journal blog. |
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