Extreme rainfall events alter the trophic structure in bromeliad tanks across the Neotropics

Autor(es):Mostrar menos -

Romero, Gustavo Q. ^[1] ; Marino, Nicholas A. C. ^{[2, 3]} ; MacDonald, A. Andrew M. ^{[4, 5]} ; Cereghino, Regis ^[6] ; Trzcinski, M. Kurtis ^[7] ; Mercado, Dimaris Acosta ^[8] ; Leroy, Celine ^{[9, 10]} ; Corbara, Bruno ^[11] ; Farjalla, Vinicius F. ^[2] ; Barberis, Ignacio M. ^[12] ; Dezerald, Olivier ^[13] ; Hammill, Edd ^{[14, 15]} ; Atwood, Trisha B. ^{[14, 15]} ; Piccoli, Gustavo C. O. ^[16] ; Ospina Bautista, Fabiola ^{[17, 18]} ; Carrias, Jean-Francois ^[11] ; Leal, Juliana S. ^[3] ; Montero, Guillermo ^[12] ; Antiqueira, Pablo A. P. ^[1] ; Freire, Rodrigo ^[12] ; Realpe, Emilio ^[17] ; Amundrud, Sarah L. ^{[19, 20]} ; de Omena, Paula M. ^[21] ; Campos, Alice B. A. ^[3] ; Kratina, Pavel ^[22] ; O'Gorman, Eoin J. ^[23] ; Srivastava, Diane S. ^{[19, 20]}

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ Campinas UNICAMP, Inst Biol, Dept Anim Biol, Lab Multitroph Interact & Biodivers, BR-13083862 Campinas, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Biol, Dept Ecol, Ctr Ciencias Saud, POB 68020, Rio De Janeiro, RJ - Brazil

^[3] Univ Fed Rio de Janeiro UFRJ, Programa Posgrad Ecol, CP 68020, Rio De Janeiro, RJ - Brazil

^[4] Univ Montreal, Montreal, PQ - Canada

^[5] Ctr Synth & Anal Biodivers CESAB FRB, Aix En Provence - France

^[6] Univ Toulouse, CNRS, Lab Ecol Fonct & Environm, Toulouse - France

^[7] Univ British Columbia, Dept Forest & Conservat Sci, Vancouver, BC - Canada

^[8] Univ Puerto Rico Mayaguez Campus, Dept Biol, Mayaguez, PR 00681 - USA

^[9] Univ Montpellier, CNRS, AMAP, CIRAD, INRAE, IRD, Montpellier - France

^[10] Univ Antilles, Univ Guyane, CNRS, UMR ECOFOG, CIRAD, INRAE, AgroParisTech, F-97379 Kourou - France

^[11] Univ Clermont Auvergne, CNRS, LMGE Lab Microorganismes Genome & Environm, F-63000 Clermont Ferrand - France

^[12] Univ Nacl Rosario, Inst Invest Ciencias Agr Rosario, Fac Ciencias Agr, IICAR CONICET UNR, S2125ZAA, Zavalla - Argentina

^[13] Agrocampus Ouest, ESE, Ecol & Ecosyst Hlth, INRAE, F-35042 Rennes - France

^[14] Utah State Univ, Ecol Ctr, Logan, UT 84322 - USA

^[15] Utah State Univ, Dept Watershed Sci, Logan, UT 84322 - USA

^[16] Univ Sa Paulo State UNESP IBILCE, Dept Zool & Bot, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[17] Univ Andes, Dept Ciencias Biol, Bogota 111711 - Colombia

^[18] Univ Caldas, Dept Ciencias Biol, Manizales 170004 - Colombia

^[19] Univ British Columbia, Dept Zool, Vancouver, BC V6T 1Z4 - Canada

^[20] Univ British Columbia, Biodivers Res Ctr, Vancouver, BC V6T 1Z4 - Canada

^[21] Univ Fed Para, Inst Biol Sci, Belem, PA - Brazil

^[22] Queen Mary Univ London, Sch Biol & Chem Sci, London - England

^[23] Univ Essex, Sch Life Sci, Colchester, Essex - England

• Tipo de documento: Artigo Científico
• Fonte: NATURE COMMUNICATIONS; v. 11, n. 1 JUN 25 2020.
• Citações Web of Science: 0

Resumo

Changes in global and regional precipitation regimes are among the most pervasive components of climate change. Intensification of rainfall cycles, ranging from frequent downpours to severe droughts, could cause widespread, but largely unknown, alterations to trophic structure and ecosystem function. We conducted multi-site coordinated experiments to show how variation in the quantity and evenness of rainfall modulates trophic structure in 210 natural freshwater microcosms (tank bromeliads) across Central and South America (18 degrees N to 29 degrees S). The biomass of smaller organisms (detritivores) was higher under more stable hydrological conditions. Conversely, the biomass of predators was highest when rainfall was uneven, resulting in top-heavy biomass pyramids. These results illustrate how extremes of precipitation, resulting in localized droughts or flooding, can erode the base of freshwater food webs, with negative implications for the stability of trophic dynamics. The amount and frequency of rainfall structures aquatic food webs. Here the authors show that in tropical tank bromeliads, lower trophic levels are more abundant in stable rainfall conditions, while biomass pyramids are inverted in conditions with periodic droughts. (AU)

• Processo FAPESP: 12/51143-3 - Mudanças climáticas globais e funcionamento de ecossistemas em fitotelmatas
• Beneficiário: Gustavo Quevedo Romero
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular
• Processo FAPESP: 16/01209-9 - Efeitos das mudanças climáticas sobre estrutura de redes tróficas em gradientes latitudinais
• Beneficiário: Gustavo Quevedo Romero
• Linha de fomento: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 17/09052-4 - Influência da latitude e dos subsídios aquáticos na amplitude de nicho e na estrutura das comunidades terrestres
• Beneficiário: Gustavo Quevedo Romero
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/04603-4 - Efeitos do aquecimento global na estrutura trófica e no funcionamento ecossistêmico em bromélias-tanque
• Beneficiário: Pablo Augusto Poleto Antiqueira
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/26243-8 - Eventos extremos de precipitação e seus efeitos sobre a estrutura de comunidades e funcionamento ecossistêmico
• Beneficiário: Pablo Augusto Poleto Antiqueira
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado