Community phenology of insects on oak: local differentiation along a climatic gradient
Community phenology of insects on oak: local differentiation along a climatic gradient
复制标题
橡树上昆虫的群落物候学：沿气候梯度的局部分化
DOI：
10.1002/ecs2.3785
复制
发表时间：
2021
期刊：
影响因子：
2.7
通讯作者：
Ekholm A
中科院分区：
文献类型：
--
作者：
Ekholm A
气候变化正在推进物候事件的发生，推进速度因物种和营养水平而异。此外，同一物种的当地种群可能在对季节性线索的反应中表现出遗传差异。如果相互作用物种的种群在其响应方面有所不同，那么气候变化可能会导致相互作用强度的群落水平分布的地理变化。我们探讨了营养和物种水平的温度反应的幅度在一个三营养系统，包括有柄橡树，昆虫食草动物，及其相关的寄生蜂。我们在沿着一条跨越15个纬度的样带的5个地点对这一群落的当地认识进行了取样。每个地点每个营养水平的样本在气候室中越冬期间暴露于相同的五种气候状况。然后，我们记录了橡树橡子发育和昆虫出现所需的天数和度日数。在事件发生的日期方面，不同种群的物候不同。在度日方面，我们发现，对于两个物种对，在春季发育所需的热量总和在最高温度下越冬时，营养水平之间的差异为额外的0.500度日。对于三个物种来说，在较高的温度下，出现所需的度日数的种群内变化较高。我们的研究结果表明，温度变化可以通过改变相互作用物种的相对物候来改变群落内的相互作用，并且某些相互作用比其他相互作用更容易受到温度变化的影响。一个物种的物候反应的地理变异表明，在决定当地种群的物候有一个遗传成分。这种地方性的变化与种间反应的差异相结合，使得理解社区如何应对气温升高变得复杂。
Climate change is advancing the onset of phenological events, with the rate of advance varying among species and trophic levels. In addition, local populations of the same species may show genetic differences in their response to seasonal cues. If populations of interacting species differ in their response, then climate change may result in geographically varying shifts in the community‐level distribution of interaction strength. We explored the magnitude of trophic‐ and species‐level responses to temperature in a tritrophic system comprising pedunculate oak, insect herbivores, and their associated parasitoids. We sampled local realizations of this community at five sites along a transect spanning fifteen degrees of latitude. Samples from each trophic level at each site were exposed to the same set of five climatic regimes during overwintering in climate chambers. We then recorded the number of days and degree‐days required for oak acorns to develop and insects to emerge. In terms of dates of events, phenology differed among populations. In terms of degree‐days, we found that for two species pairs, the heat sum required to develop in spring differed by an additional ˜500 degree‐days between trophic levels when overwintering at the highest temperature. For three species, within‐population variation in the number of degree‐days required for emergence was higher at warmer temperatures. Our findings suggest that changing temperatures can modify interactions within a community by altering the relative phenology of interacting species and that some interactions are more vulnerable than others to a shift in temperature. The geographic variation in the phenological response of a species suggests that there is a genetic component in determining the phenology of local populations. Such local variation blended with interspecific differences in responses makes it complex to understand how communities will respond to warmer temperatures.
登录
查看更多内容
影响因子：
2.3
作者：
Abe, Y.;Ide, T.;Wachi, N.
通讯作者：
Wachi, N.
在构建食草动物群落时，空间位置主导着寄主植物基因型。
影响因子：
4.8
作者：
A. Tack;O. Ovaskainen;P. Pulkkinen;T. Roslin
通讯作者：
T. Roslin
影响因子：
2.6
作者：
Stålhandske S;Lehmann P;Pruisscher P;Leimar O
通讯作者：
Leimar O
影响因子：
11.6
作者：
A. Valdés;Bryndís Marteinsdóttir;J. Ehrlén
通讯作者：
A. Valdés;Bryndís Marteinsdóttir;J. Ehrlén
影响因子：
4.1
作者：
Acs, Zoltan;Challis, Richard J.;Stone, Graham N.
通讯作者：
Stone, Graham N.