When phenology matters: age-size truncation alters population response to trophic mismatch.
When phenology matters: age-size truncation alters population response to trophic mismatch.
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DOI：
10.1098/rspb.2014.0938
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发表时间：
2014-10-22
期刊：
影响因子：
--
通讯作者：
Vøllestad LA
中科院分区：
文献类型：
--
作者：
Ohlberger J;Thackeray SJ;Winfield IJ;Maberly SC;Vøllestad LA
气候引起的生活史事件发生时间的变化是一个世界性的现象，这些变化可以使物种之间的相互作用，如捕食者-猎物关系，失去同步。为了理解季节性变化的生态影响，我们需要考虑物候变化如何与其他环境变化因素相互作用，如开发和疾病传播，这些因素通常会侵蚀野生种群的人口结构。使用长期观测数据的物候和动态的模型捕食者-猎物系统（鱼类和浮游动物在温德米尔，英国），我们表明，年龄大小截断的捕食者种群改变的后果物候不匹配的后代生存和人口丰度。具体而言，年龄大小截断减少种内密度调节由于竞争和同类相食，从而放大了人口的敏感性，气候引起的捕食者-猎物竞争，这增加了捕食者丰度的变化。高度的种群变异性带来了重大的生态和经济挑战，因为它会降低可持续的收获率，增加种群崩溃的风险。我们的研究结果强调了保持种群内年龄大小多样性的重要性，以缓冲种群对物候的影响，并强调需要考虑环境影响的相互作用，如果我们要了解和项目复杂的生态结果。
Climate-induced shifts in the timing of life-history events are a worldwide phenomenon, and these shifts can de-synchronize species interactions such as predator–prey relationships. In order to understand the ecological implications of altered seasonality, we need to consider how shifts in phenology interact with other agents of environmental change such as exploitation and disease spread, which commonly act to erode the demographic structure of wild populations. Using long-term observational data on the phenology and dynamics of a model predator–prey system (fish and zooplankton in Windermere, UK), we show that age–size truncation of the predator population alters the consequences of phenological mismatch for offspring survival and population abundance. Specifically, age–size truncation reduces intraspecific density regulation due to competition and cannibalism, and thereby amplifies the population sensitivity to climate-induced predator–prey asynchrony, which increases variability in predator abundance. High population variability poses major ecological and economic challenges as it can diminish sustainable harvest rates and increase the risk of population collapse. Our results stress the importance of maintaining within-population age–size diversity in order to buffer populations against phenological asynchrony, and highlight the need to consider interactive effects of environmental impacts if we are to understand and project complex ecological outcomes.
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影响因子：
64.8
作者：
Beaugrand, G;Brander, KM;Reid, PC
通讯作者：
Reid, PC
影响因子：
2.7
作者：
CRAIG, JF
通讯作者：
CRAIG, JF
影响因子：
2.7
作者：
Maberly, S. C.;Elliott, J. A.
通讯作者：
Elliott, J. A.
影响因子：
4.1
作者：
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通讯作者：
Seamons TR
DOI：
10.1098/rstb.2004.1586
发表时间：
2005-02-28
影响因子：
6.3
作者：
Hutchings, JA;Baum, JK
通讯作者：
Baum, JK