globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13399
Rainfall and hydrological stability alter the impact of top predators on food web structure and function
Author: Marino N.A.C.; Srivastava D.S.; MacDonald A.A.M.; Leal J.S.; Campos A.B.A.; Farjalla V.F.
Source Publication: Global Change Biology
ISSN: 13541013
Publishing Year: 2017
Volume: 23, Issue:2
pages begin: 673
pages end: 685
Language: 英语
Keyword: climate change ; consumptive effect ; food web ; predation risk ; rainfall ; tank bromeliad
Scopus Keyword: Bacteria (microorganisms) ; Zygoptera
English Abstract: Climate change will alter the distribution of rainfall, with potential consequences for the hydrological dynamics of aquatic habitats. Hydrological stability can be an important determinant of diversity in temporary aquatic habitats, affecting species persistence and the importance of predation on community dynamics. As such, prey are not only affected by drought-induced mortality but also the risk of predation [a non-consumptive effect (NCE)] and actual consumption by predators [a consumptive effect (CE)]. Climate-induced changes in rainfall may directly, or via altered hydrological stability, affect predator–prey interactions and their cascading effects on the food web, but this has rarely been explored, especially in natural food webs. To address this question, we performed a field experiment using tank bromeliads and their aquatic food web, composed of predatory damselfly larvae, macroinvertebrate prey and bacteria. We manipulated the presence and consumption ability of damselfly larvae under three rainfall scenarios (ambient, few large rainfall events and several small rainfall events), recorded the hydrological dynamics within bromeliads and examined the effects on macroinvertebrate colonization, nutrient cycling and bacterial biomass and turnover. Despite our large perturbations of rainfall, rainfall scenario had no effect on the hydrological dynamics of bromeliads. As a result, macroinvertebrate colonization and nutrient cycling depended on the hydrological stability of bromeliads, with no direct effect of rainfall or predation. In contrast, rainfall scenario determined the direction of the indirect effects of predators on bacteria, driven by both predator CEs and NCEs. These results suggest that rainfall and the hydrological stability of bromeliads had indirect effects on the food web through changes in the CEs and NCEs of predators. We suggest that future studies should consider the importance of the variability in hydrological dynamics among habitats as well as the biological mechanisms underlying the ecological responses to climate change. © 2016 John Wiley & Sons Ltd
Funding Project: The authors thank T. Benevides, C. S. Casa-Nova, J. L. S. Ferro, S. Jacques, M. M. Moreira, A. P. F. Pires, V. Scofield and P. Trasmonte for help with the experiment. We are also very thankful to Gustavo Q. Romero for providing the labelled 15N leaf litter used in this study and also to Bram Vanschoenwinkel, Rolf Vinebrooke and another anonymous reviewer for the insightful comments and suggestions that improved this manuscript. This study was performed with the support of CNPq, Conselho Nacional de Desenvolvimento Científico e Tecnológico – Brasil (process number 200265/2014-8 to N.A.C. M. and 476926/2012-2 to V. F. Farjalla), and FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, process number E-26/103316/2011 to V. F. Farjalla). This study was conducted under the research permit number 38247-1 (ICMBio/MMA). We thank UBC Biodiversity Research Centre for hosting N. A. C. Marino and V. F. Farjalla as visiting scholars during the development of this manuscript.
Citation statistics:
被引频次[WOS]:16   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.

Affiliation: Laboratório de Limnologia, Departamento de Ecologia, Instituto de Biologia, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, PO Box 68020, Rio de Janeiro, RJ, Brazil; Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada; Laboratorio Internacional en Cambio Global (LINCGlobal), Brazil

Recommended Citation:
Marino N.A.C.,Srivastava D.S.,MacDonald A.A.M.,et al. Rainfall and hydrological stability alter the impact of top predators on food web structure and function[J]. Global Change Biology,2017-01-01,23(2)
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Marino N.A.C.]'s Articles
[Srivastava D.S.]'s Articles
[MacDonald A.A.M.]'s Articles
Similar articles in Baidu Scholar
[Marino N.A.C.]'s Articles
[Srivastava D.S.]'s Articles
[MacDonald A.A.M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Marino N.A.C.]‘s Articles
[Srivastava D.S.]‘s Articles
[MacDonald A.A.M.]‘s Articles
Related Copyright Policies
所有评论 (0)

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.