Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14521 |
Bottom-up and top-down effects of browning and warming on shallow lake food webs | |
Vasconcelos, Francisco Rivera1,2; Diehl, Sebastian1,2; Rodriguez, Patricia1,3; Hedstrom, Per1; Karlsson, Jan1; Bystroem, Paer1 | |
2019-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:2页码:504-521 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Argentina |
英文摘要 | Productivity and trophic structure of aquatic ecosystems result from a complex interplay of bottom-up and top-down forces that operate across benthic and pelagic food web compartments. Projected global changes urge the question how this interplay will be affected by browning (increasing input of terrestrial dissolved organic matter), nutrient enrichment and warming. We explored this with a process-based model of a shallow lake food web consisting of benthic and pelagic components (abiotic resources, primary producers, grazers, carnivores), and compared model expectations with the results of a browning and warming experiment in nutrient-poor ponds harboring a boreal lake community. Under low nutrient conditions, the model makes three major predictions. (a) Browning reduces light and increases nutrient supply; this decreases benthic and increases pelagic production, gradually shifting productivity from the benthic to the pelagic habitat. (b) Because of active habitat choice, fish exert top-down control on grazers and benefit primary producers primarily in the more productive of the two habitats. (c) Warming relaxes top-down control of grazers by fish and decreases primary producer biomass, but effects of warming are generally small compared to effects of browning and nutrient supply. Experimental results were consistent with most model predictions for browning: light penetration, benthic algal production, and zoobenthos biomass decreased, and pelagic nutrients and pelagic algal production increased with browning. Also consistent with expectations, warming had negative effects on benthic and pelagic algal biomass and weak effects on algal production and zoobenthos and zooplankton biomass. Inconsistent with expectations, browning had no effect on zooplankton and warming effects on fish depended on browning. The model is applicable also to nutrient-rich systems, and we propose that it is a useful tool for the exploration of the consequences of different climate change scenarios for productivity and food web dynamics in shallow lakes, the worldwide most common lake type. |
英文关键词 | benthic and pelagic habitats bottom-up and top-down control browning food webs light and nutrients shallow lake top predator warming |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456028900011 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; METABOLIC BALANCE ; TEMPERATURE-DEPENDENCE ; CLIMATE-CHANGE ; GROWTH-RATE ; MATTER ; WATER ; COMPETITION ; PHOSPHORUS ; RESPONSES |
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/16754 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Umea Univ, Dept Ecol & Environm Sci, Umea, Sweden; 2.Umea Univ, Integrated Sci Lab, IceLab, Umea, Sweden; 3.Consejo Nacl Invest Cient & Tecn, CADIC, Austral Ctr Sci Res, Ushuaia, Tierra Del Fueg, Argentina |
推荐引用方式 GB/T 7714 | Vasconcelos, Francisco Rivera,Diehl, Sebastian,Rodriguez, Patricia,et al. Bottom-up and top-down effects of browning and warming on shallow lake food webs[J]. GLOBAL CHANGE BIOLOGY,2019,25(2):504-521. |
APA | Vasconcelos, Francisco Rivera,Diehl, Sebastian,Rodriguez, Patricia,Hedstrom, Per,Karlsson, Jan,&Bystroem, Paer.(2019).Bottom-up and top-down effects of browning and warming on shallow lake food webs.GLOBAL CHANGE BIOLOGY,25(2),504-521. |
MLA | Vasconcelos, Francisco Rivera,et al."Bottom-up and top-down effects of browning and warming on shallow lake food webs".GLOBAL CHANGE BIOLOGY 25.2(2019):504-521. |
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