It has been widely proposed that increasing global temperatures will promote the geographic spread of invasive species, yet few studies have examined the effects of increasing temperatures on existing populations of invaders. Here, we examine temperature trends across a 70‐year series of daily records from the lower Columbia River (Washington and Oregon), and assess the correlation between interannual water temperature variability and the abundance of several native and invasive zooplankton species using a 12‐year series of monthly zooplankton samples from a nearby station. Our results show a clear pattern of increasing temperatures in the river, with a negative correlation between elevated late summer temperatures and the abundance of all examined native taxa, but none of the examined invasive taxa. Our study supports the hypothesis that anthropogenic climate change may promote conditions more favorable to previously established populations of invasive zooplankton species.

中文翻译：

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在一条温带大河中，原生和侵入性浮游动物对最高温度的年代际尺度增长表现出不同的响应

普遍提出，升高的全球温度将促进入侵物种的地理扩散，但是很少有研究检查温度升高对现有入侵者种群的影响。在这里，我们检查了来自哥伦比亚河下游（华盛顿和俄勒冈州）的70年日常记录中的温度趋势，并使用12年评估了年际水温变化与几种原生和侵入性浮游动物种类的丰度之间的相关性。附近车站的一系列浮游动物样本。我们的结果显示出河流中温度升高的明显模式，夏末升高的温度与所有检查过的自然分类单元的丰度之间呈负相关，但没有检查过侵入性分类单元。