Environmental Uncertainty and the Global Biogeography of Cooperative Breeding in Birds
Environmental Uncertainty and the Global Biogeography of Cooperative Breeding in Birds
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DOI：
10.1016/j.cub.2010.11.075
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发表时间：
2011-01-11
期刊：
影响因子：
9.2
通讯作者：
Rubenstein, Dustin R.
中科院分区：
文献类型：
--
作者：
Jetz, Walter;Rubenstein, Dustin R.
理解为什么像变形虫、蚂蚁和鸟类这样不同的生物会合作仍然是进化生物学中的一个重要问题。尽管生态学可以影响动物社会中的合作和冲突，并与物种社会性的差异有关[1]，但在广泛的地理和分类尺度上，社会性的环境预测因子仍然知之甚少[2]。特别是，在大多数进化研究中，选择压力的时间变化的重要性被低估了[3，4]。气候变化导致的环境不确定性可能是选择压力随时间变化的重要驱动因素，因此预计会影响行为，形态和生理特征的进化，包括合作[5]。使用超过95%的世界上的鸟类的数据集，我们研究了全球地理和环境，生物和历史的鸟类社会行为的地理预测。我们发现，在社会行为的环境和生物因素，即10年的环境变化的降水是重要的预测显着的空间变化。虽然鸟类社会行为中清晰的全球地理结构携带着强烈的进化历史信号，但环境的不确定性在解释鸟类合作繁殖行为的发生和分布方面起着额外的关键作用。
Understanding why organisms as different as amoebas, ants, and birds cooperate remains an important question in evolutionary biology. Although ecology can influence cooperation and conflict within animal societies and has been implicated in species differences in sociality [1], the environmental predictors of sociality across broad geographic and taxonomic scales remain poorly understood [2]. In particular, the importance of temporal variation in selection pressure has been underestimated in most evolutionary studies [3, 4]. Environmental uncertainty resulting from climatic variation is likely to be an important driver of temporal variation in selection pressure and therefore is expected to impact the evolution of behavioral, morphological, and physiological traits, including cooperation [5]. Using a data set of over 95% of the world's birds, we examine the global geography and environmental, biotic, and historical biogeographic predictors of avian social behavior. We find dramatic spatial variation in social behavior for which environmental and biotic factors-namely, among-year environmental variability in precipitation-are important predictors. Although the clear global biogeographic structure in avian social behavior carries a strong signal of evolutionary history, environmental uncertainty plays an additional key role in explaining the incidence and distribution of avian cooperative breeding behavior.