| DOI: | 10.1111/gcb.14551
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| Scopus记录号: | 2-s2.0-85062768824
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| 论文题名: | Warmer and browner waters decrease fish biomass production |
| 作者: | van Dorst R.M.; Gårdmark A.; Svanbäck R.; Beier U.; Weyhenmeyer G.A.; Huss M.
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| 刊名: | Global Change Biology
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| ISSN: | 13541013
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| 出版年: | 2019
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| 卷: | 25, 期:4 | | 起始页码: | 1395
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| 结束页码: | 1408
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| 语种: | 英语
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| 英文关键词: | biomass production
; browning
; climate change
; Eurasian perch
; fish
; individual body growth
; lakes
; length distribution
; ontogeny
; warming
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| Scopus关键词: | Perca fluviatilis
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| 英文摘要: | Climate change studies have long focused on effects of increasing temperatures, often without considering other simultaneously occurring environmental changes, such as browning of waters. Resolving how the combination of warming and browning of aquatic ecosystems affects fish biomass production is essential for future ecosystem functioning, fisheries, and food security. In this study, we analyzed individual- and population-level fish data from 52 temperate and boreal lakes in Northern Europe, covering large gradients in water temperature and color (absorbance, 420 nm). We show that fish (Eurasian perch, Perca fluviatilis) biomass production decreased with both high water temperatures and brown water color, being lowest in warm and brown lakes. However, while both high temperature and brown water decreased fish biomass production, the mechanisms behind the decrease differed: temperature affected the fish biomass production mainly through a decrease in population standing stock biomass, and through shifts in size- and age-distributions toward a higher proportion of young and small individuals in warm lakes; brown water color, on the other hand, mainly influenced fish biomass production through negative effects on individual body growth and length-at-age. In addition to these findings, we observed that the effects of temperature and brown water color on individual-level processes varied over ontogeny. Body growth only responded positively to higher temperatures among young perch, and brown water color had a stronger negative effect on body growth of old than on young individuals. Thus, to better understand and predict future fish biomass production, it is necessary to integrate both individual- and population-level responses and to acknowledge within-species variation. Our results suggest that global climate change, leading to browner and warmer waters, may negatively affect fish biomass production, and this effect may be stronger than caused by increased temperature or water color alone. © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/117448
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
van Dorst R.M.,Gårdmark A.,Svanbäck R.,et al. Warmer and browner waters decrease fish biomass production[J]. Global Change Biology,2019-01-01,25(4)
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