How does environmental heterogeneity affect natural selection on tree swallow nestlings? Houle et al. (2020) show that more precipitation and higher temperatures result in stronger selection on body mass and wing length and that agricultural intensity can affect the direction of selection. These findings raise the question of how genetic diversity changes under strong selection pressures, which will be especially important under ongoing agriculture intensification and climate change.

中文翻译：

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文摘：气候变化和农业集约化影响树燕自然选择的强度和方向

环境异质性如何影响树燕雏鸟的自然选择？霍尔等人。(2020) 表明，更多的降水和更高的温度会导致对体重和翼长的选择更强，农业强度会影响选择的方向。这些发现提出了一个问题，即遗传多样性如何在强大的选择压力下发生变化，这在持续的农业集约化和气候变化下尤为重要。