Temperature-versus precipitation-limitation shape local temperature tolerance in a Holarctic freshwater crustacean

被引:26
作者
Seefeldt, Leonie [1 ]
Ebert, Dieter [1 ]
机构
[1] Univ Basel, Dept Environm Sci, Zool, Vesalgasse 1, CH-4051 Basel, Switzerland
基金
瑞士国家科学基金会;
关键词
local adaptation; temperature adaptation; life history; freshwater organisms; diversity panel; LIFE-HISTORY TRAITS; HEAT TOLERANCE; CLIMATE-CHANGE; POPULATIONS; ADAPTATION; INDUCTION; DIAPAUSE; TERMINATION; RESPONSES; EVENTS;
D O I
10.1098/rspb.2019.0929
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Species with wide geographical distributions are often adapted locally to the prevailing temperatures. To understand how they respond to ongoing climatic change, we must appreciate the interplay between temperature, seasonality and the organism's life cycle. The temperature experienced by many organisms results from an often-overlooked combination of climate and phenology. Summer-active (high latitude) populations are expected to adapt to local summer temperatures, but this is not expected for populations that outlive the summer in their dormant stage (low latitude, precipitationlimited). We recorded reproduction and survival in genotypes from 123 Holarctic populations of Daphnia magna during a multi-generation thermal ramp experiment. Genotypes from summer-active populations showed a positive relationship between heat tolerance and local summer temperature, whereas winter-active populations did not. These findings are consistent with the hypothesis that D. magna adapts to the local temperatures the animals experience during their planktonic phase. We conclude that predicting local temperature adaptation, in particular in the light of climate change, needs to consider the phenology of geographically wide-ranging species.
引用
收藏
页数:9
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