Ecological specialization, variability in activity patterns and response to environmental change
Ecological specialization, variability in activity patterns and response to environmental change
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DOI：
10.1098/rsbl.2018.0115
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发表时间：
2018-06-01
期刊：
影响因子：
3.3
通讯作者：
Lacey, Eileen A.
中科院分区：
文献类型：
--
作者：
Hammond, Talisin T.;Palme, Rupert;Lacey, Eileen A.
活动的时间模式的差异可以调节生物体所暴露的环境条件，为应对环境变化提供了一个重要的机制。这种差异可能与生态通才特别相关，因为预计他们会遇到更广泛的环境条件。在这里，我们比较时间模式的活动部分同域种群的通才（lodgepole花栗鼠，Tamias speciosus）和一个更专业的同类（高山花栗鼠，Tamias alpinus），显示了不同的反应，过去世纪的环境变化。虽然平均活动预算是相似的物种之间，在运动的个体水平的变化分析表明，T。alpinus比T.美丽的进一步分析表明，T.高山是更活跃的一天早些时候，当温度较低，和活动模式为这两个物种的变化增加种间共现。这些结果与T. alpinus适应环境条件的变化。除了强调加速计收集行为数据的实用性外，我们的研究结果还增加了越来越多的证据，表明生态通才所表现出的更大的表型变异性可能对环境变化的原位反应至关重要。
Differences in temporal patterns of activity can modulate the ambient conditions to which organisms are exposed, providing an important mechanism for responding to environmental change. Such differences may be particularly relevant to ecological generalists, which are expected to encounter a wider range of environmental conditions. Here, we compare temporal patterns of activity for partially sympatric populations of a generalist (the lodgepole chipmunk, Tamias speciosus) and a more specialized congener (the alpine chipmunk, Tamias alpinus) that have displayed divergent responses to the past century of environmental change. Although mean activity budgets were similar between species, analyses of individual-level variation in locomotion revealed that T. alpinus exhibited a narrower range of activity patterns than T. speciosus. Further analyses revealed that T. alpinus was more active earlier in the day, when temperatures were cooler, and that activity patterns for both species changed with increased interspecific co-occurrence. These results are consistent with the greater responsiveness of T. alpinus to changes in environmental conditions. In addition to highlighting the utility of accelerometers for collecting behavioural data, our findings add to a growing body of evidence, suggesting that the greater phenotypic variability displayed by ecological generalists may be critical to in situ responses to environmental change.