| DOI: | 10.1111/gcb.13085
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| 论文题名: | Winter severity determines functional trait composition of phytoplankton in seasonally ice-covered lakes |
| 作者: | Özkundakci D.; Gsell A.S.; Hintze T.; Täuscher H.; Adrian R.
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| 刊名: | Global Change Biology
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| ISSN: | 13541013
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| 出版年: | 2016
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| 卷: | 22, 期:1 | | 起始页码: | 284
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| 结束页码: | 298
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| 语种: | 英语
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| 英文关键词: | Climate change
; Functional groups
; Ice thickness
; Phytoplankton traits
; Winter limnology
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| Scopus关键词: | climate change
; climate effect
; community response
; functional group
; functional response
; ice cover
; lake water
; limnology
; phytoplankton
; winter
; Berlin
; Germany
; Muggelsee
; fresh water
; biomass
; classification
; climate change
; Germany
; growth, development and aging
; ice cover
; lake
; phytoplankton
; season
; sunlight
; Biomass
; Climate Change
; Fresh Water
; Germany
; Ice Cover
; Lakes
; Phytoplankton
; Seasons
; Sunlight
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| 英文摘要: | How climate change will affect the community dynamics and functionality of lake ecosystems during winter is still little understood. This is also true for phytoplankton in seasonally ice-covered temperate lakes which are particularly vulnerable to the presence or absence of ice. We examined changes in pelagic phytoplankton winter community structure in a north temperate lake (Müggelsee, Germany), covering 18 winters between 1995 and 2013. We tested how phytoplankton taxa composition varied along a winter-severity gradient and to what extent winter severity shaped the functional trait composition of overwintering phytoplankton communities using multivariate statistical analyses and a functional trait-based approach. We hypothesized that overwintering phytoplankton communities are dominated by taxa with trait combinations corresponding to the prevailing winter water column conditions, using ice thickness measurements as a winter-severity indicator. Winter severity had little effect on univariate diversity indicators (taxon richness and evenness), but a strong relationship was found between the phytoplankton community structure and winter severity when taxon trait identity was taken into account. Species responses to winter severity were mediated by the key functional traits: motility, nutritional mode, and the ability to form resting stages. Accordingly, one or the other of two functional groups dominated the phytoplankton biomass during mild winters (i.e., thin or no ice cover; phototrophic taxa) or severe winters (i.e., thick ice cover; exclusively motile taxa). Based on predicted milder winters for temperate regions and a reduction in ice-cover durations, phytoplankton communities during winter can be expected to comprise taxa that have a relative advantage when the water column is well mixed (i.e., need not be motile) and light is less limiting (i.e., need not be mixotrophic). A potential implication of this result is that winter severity promotes different communities at the vernal equinox, which may have different nutritional quality for the next trophic level and ecosystem-scale effects. © 2016 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/61534
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Department of Ecosystem Research, Leibniz Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany
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| Recommended Citation: | |
Özkundakci D.,Gsell A.S.,Hintze T.,et al. Winter severity determines functional trait composition of phytoplankton in seasonally ice-covered lakes[J]. Global Change Biology,2016-01-01,22(1)
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