Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13696 |
Biotic interactions modify multiple-stressor effects on juvenile brown trout in an experimental stream food web | |
Bruder, Andreas; Salis, Romana K.; Jones, Peter E.; Matthaei, Christoph D. | |
2017-09-01 | |
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:9 |
文章类型 | Article |
语种 | 英语 |
国家 | New Zealand |
英文摘要 | Agricultural land use results in multiple stressors affecting stream ecosystems. Flow reduction due to water abstraction, elevated levels of nutrients and chemical contaminants are common agricultural stressors worldwide. Concurrently, stream ecosystems are also increasingly affected by climate change. Interactions among multiple co-occurring stressors result in biological responses that cannot be predicted from single-stressor effects (i.e. synergisms and antagonisms). At the ecosystem level, multiple-stressor effects can be further modified by biotic interactions (e.g. trophic interactions). We conducted a field experiment using 128 flow-through stream mesocosms to examine the individual and combined effects of water abstraction, nutrient enrichment and elevated levels of the nitrification inhibitor dicyandiamide (DCD) on survival, condition and gut content of juvenile brown trout and on benthic abundance of their invertebrate prey. Flow velocity reduction decreased fish survival (-12% compared to controls) and condition (-8% compared to initial condition), whereas effects of nutrient and DCD additions and interactions among these stressors were not significant. Negative effects of flow velocity reduction on fish survival and condition were consistent with effects on fish gut content (-25% compared to controls) and abundance of dominant invertebrate prey (-30% compared to controls), suggesting a negative metabolic balance driving fish mortality and condition decline, which was confirmed by structural equation modelling. Fish mortality under reduced flow velocity increased as maximal daily water temperatures approached the upper limit of their tolerance range, reflecting synergistic interactions between these stressors. Our study highlights the importance of indirect stressor effects such as those transferred through trophic interactions, which need to be considered when assessing and managing fish populations and stream food webs in multiple-stressor situations. However, in real streams, compensatory mechanisms and behavioural responses, as well as seasonal and spatial variation, may alter the intensity of stressor effects and the sensitivity of trout populations. |
英文关键词 | agricultural stressors flow velocity freshwater fish invertebrate prey nitrification inhibitor nutrient enrichment stressor interactions water temperature |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406812100037 |
WOS关键词 | DEPOSITED FINE SEDIMENT ; MIXED-EFFECTS MODELS ; FRESH-WATER ; CLIMATE-CHANGE ; DISSOLVED NUTRIENTS ; MESOCOSM EXPERIMENT ; FISH POPULATIONS ; RESPONSES ; HABITAT ; TEMPERATURE |
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/16620 |
专题 | 气候变化 资源环境科学 |
作者单位 | Univ Otago, Dept Zool, Dunedin, New Zealand |
推荐引用方式 GB/T 7714 | Bruder, Andreas,Salis, Romana K.,Jones, Peter E.,et al. Biotic interactions modify multiple-stressor effects on juvenile brown trout in an experimental stream food web[J]. GLOBAL CHANGE BIOLOGY,2017,23(9). |
APA | Bruder, Andreas,Salis, Romana K.,Jones, Peter E.,&Matthaei, Christoph D..(2017).Biotic interactions modify multiple-stressor effects on juvenile brown trout in an experimental stream food web.GLOBAL CHANGE BIOLOGY,23(9). |
MLA | Bruder, Andreas,et al."Biotic interactions modify multiple-stressor effects on juvenile brown trout in an experimental stream food web".GLOBAL CHANGE BIOLOGY 23.9(2017). |
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