A geographic mosaic of trophic interactions and selection: trees, aphids and birds
A geographic mosaic of trophic interactions and selection: trees, aphids and birds
复制标题
营养相互作用和选择的地理镶嵌图：树木、蚜虫和鸟类
DOI：
--
复制
发表时间：
2011
影响因子：
2.1
通讯作者：
T. Whitham
中科院分区：
文献类型：
--
作者：
D. S. Smith;Joseph K. Bailey;S. Shuster;T. Whitham
已知植物的遗传变异会影响节肢动物组合和物种相互作用。然而，这些影响可能取决于当地的环境条件。在这里，我们研究了基于植物基因型的营养相互作用和自然选择模式如何在环境中变化。通过研究三叶杨、杨树、瘿蚜、甜菜天疱疮及其鸟类捕食者，我们在环境梯度上使用了三个常见花园，以研究植物基因型对瘿丰度、瘿大小、蚜虫繁殖力和瘿捕食率的影响。出现了三种模式：（i）植物基因型解释了瘿丰度和捕食的变化，（ii）G×E解释了蚜虫繁殖力的变化，环境解释了瘿丰度和瘿大小的变化，（iii）对瘿大小的自然选择在不同环境中从定向变为稳定。
Genetic variation in plants is known to influence arthropod assemblages and species interactions. However, these influences may be contingent upon local environmental conditions. Here, we examine how plant genotype‐based trophic interactions and patterns of natural selection change across environments. Studying the cottonwood tree, Populus angustifolia, the galling aphid, Pemphigus betae and its avian predators, we used three common gardens across an environmental gradient to examine the effects of plant genotype on gall abundance, gall size, aphid fecundity and predation rate on galls. Three patterns emerged: (i) plant genotype explained variation in gall abundance and predation, (ii) G×E explained variation in aphid fecundity, and environment explained variation in gall abundance and gall size, (iii) natural selection on gall size changed from directional to stabilizing across environments.