Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13581 |
Impaired ecosystem process despite little effects on populations: modeling combined effects of warming and toxicants | |
Galic, Nika1,2; Grimm, Volker3; Forbes, Valery E.2,4 | |
2017-08-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Freshwater ecosystems are exposed to many stressors, including toxic chemicals and global warming, which can impair, separately or in combination, important processes in organisms and hence higher levels of organization. Investigating combined effects of warming and toxicants has been a topic of little research, but neglecting their combined effects may seriously misguide management efforts. To explore how toxic chemicals and warming, alone and in combination, propagate across levels of biological organization, including a key ecosystem process, we developed an individual-based model (IBM) of a freshwater amphipod detritivore, Gammarus pseudolimnaeus, feeding on leaf litter. In this IBM, life history emerges from the individuals' energy budgets. We quantified, in different warming scenarios (+1-+4 degrees C), the effects of hypothetical toxicants on suborganismal processes, including feeding, somatic and maturity maintenance, growth, and reproduction. Warming reduced mean adult body sizes and population abundance and biomass, but only in the warmest scenarios. Leaf litter processing, a key contributor to ecosystem functioning and service delivery in streams, was consistently enhanced by warming, through strengthened interaction between the detritivorous consumer and its resource. Toxicant effects on feeding and maintenance resulted in initially small adverse effects on consumers, but ultimately led to population extinction and loss of ecosystem process. Warming in combination with toxicants had little effect at the individual and population levels, but ecosystem process was impaired in the warmer scenarios. Our results suggest that exposure to the same amount of toxicants can disproportionately compromise ecosystem processing depending on global warming scenarios; for example, reducing organismal feeding rates by 50% will reduce resource processing by 50% in current temperature conditions, but by up to 200% with warming of 4 degrees C. Our study has implications for assessing and monitoring impacts of chemicals on ecosystems facing global warming. We advise complementing existing monitoring approaches with directly quantifying ecosystem processes and services. |
英文关键词 | dynamic energy budgets ecosystem services freshwater ecosystems individual-based model leaf litter processing multiple stressors population dynamics |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404863300004 |
WOS关键词 | GAMMARUS-PSEUDOLIMNAEUS BOUSFIELD ; ECOLOGICAL RISK-ASSESSMENT ; ENERGY BUDGET THEORY ; CLIMATE-CHANGE ; DAPHNIA-MAGNA ; LIFE-HISTORY ; LITTER DECOMPOSITION ; NATURAL STRESSORS ; BODY-SIZE ; 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/17148 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Nebraska, Sch Biol Sci, Lincoln, NE 68588 USA; 2.Univ Minnesota, Dept Ecol Evolut & Behav, Gortner Lab 140, 1479 Gortner Ave, St Paul, MN 55108 USA; 3.UFZ Helmholtz Ctr Environm Res, Dept Ecol Modelling, Permoserstr 15, D-04318 Leipzig, Germany; 4.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5e, D-04103 Leipzig, Germany |
推荐引用方式 GB/T 7714 | Galic, Nika,Grimm, Volker,Forbes, Valery E.. Impaired ecosystem process despite little effects on populations: modeling combined effects of warming and toxicants[J]. GLOBAL CHANGE BIOLOGY,2017,23(8). |
APA | Galic, Nika,Grimm, Volker,&Forbes, Valery E..(2017).Impaired ecosystem process despite little effects on populations: modeling combined effects of warming and toxicants.GLOBAL CHANGE BIOLOGY,23(8). |
MLA | Galic, Nika,et al."Impaired ecosystem process despite little effects on populations: modeling combined effects of warming and toxicants".GLOBAL CHANGE BIOLOGY 23.8(2017). |
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