Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13399 |
Rainfall and hydrological stability alter the impact of top predators on food web structure and function | |
Marino, Nicholas A. C.1; Srivastava, Diane S.2,3; MacDonald, A. Andrew M.2,3; Leal, Juliana S.1; Campos, Alice B. A.1; Farjalla, Vinicius F.1,4 | |
2017-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; Canada; Spain |
英文摘要 | 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. |
英文关键词 | climate change consumptive effect food web predation risk rainfall tank bromeliad |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394343300019 |
WOS关键词 | WATER-LEVEL FLUCTUATIONS ; COMMUNITY STRUCTURE ; CLIMATE-CHANGE ; TROPHIC STRUCTURE ; HABITAT SIZE ; ROCK POOLS ; DROUGHT ; DIVERSITY ; RESPONSES ; DISTURBANCE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17366 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Fed Rio de Janeiro, Ctr Ciencias Saude, Inst Biol, Lab Limnol,Dept Ecol, POB 68020, Rio De Janeiro, RJ, Brazil; 2.Univ British Columbia, Dept Zool, 6270 Univ Blvd, Vancouver, BC V6T 1Z4, Canada; 3.Univ British Columbia, Biodivers Res Ctr, 6270 Univ Blvd, Vancouver, BC V6T 1Z4, Canada; 4.Lab Int Cambio Global LINCGlobal, Esporles, Spain |
推荐引用方式 GB/T 7714 | Marino, Nicholas A. C.,Srivastava, Diane S.,MacDonald, A. Andrew M.,et al. Rainfall and hydrological stability alter the impact of top predators on food web structure and function[J]. GLOBAL CHANGE BIOLOGY,2017,23(2). |
APA | Marino, Nicholas A. C.,Srivastava, Diane S.,MacDonald, A. Andrew M.,Leal, Juliana S.,Campos, Alice B. A.,&Farjalla, Vinicius F..(2017).Rainfall and hydrological stability alter the impact of top predators on food web structure and function.GLOBAL CHANGE BIOLOGY,23(2). |
MLA | Marino, Nicholas A. C.,et al."Rainfall and hydrological stability alter the impact of top predators on food web structure and function".GLOBAL CHANGE BIOLOGY 23.2(2017). |
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