Scholarlink

<p>Both the global redistribution of species through human-mediated introductions and anthropogenic climate change require species to colonize successfully if they are to persist. Phenotypic plasticity has been proposed as an important driver of colonization success, but the evidence has been mixed. We examined plasticity and seed output in the globally distributed plant <i>Arabidopsis thaliana</i>. Accessions that differ in their colonization history (recent colonizers of North America, post-glacial colonizers of Eurasia, and relicts with no history of recent colonization) were grown under three treatments: fertilizer, competition, and herbivory in a full factorial design greenhouse study. We measured eight traits to quantify plasticity and three traits to quantify fitness. Plasticity did not significantly differ by colonization history, nor between accessions of the same genetic cluster in native vs. introduced ranges. Eurasian and North American colonizers had similar seed output in most environments while North American colonizers had higher seed output than relicts. Eurasian colonizers and relicts had similar seed outputs except under fertilizer, where Eurasian colonizer seed output was higher. Our results suggest that colonization has not served as a filtering mechanism in which more plastic individuals are favored; however, phenotypic plasticity that may have aided colonization may not persist in the post-colonization period. Higher seed output in North American and Eurasian colonizers relative to relicts suggests that selection for elevated reproductive output may have pre-adapted these accessions for the more recent colonization of North America.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Is phenotypic plasticity associated with colonization success? Comparisons of Eurasian colonizers, North American colonizers, and relict groups of Arabidopsis thaliana

  • 期刊论文

  • 发表日期：

    2026年7月7日

查看全文
  • Maya L. Shamsid-Deen,
  • Kenneth D. Whitney

摘要

Both the global redistribution of species through human-mediated introductions and anthropogenic climate change require species to colonize successfully if they are to persist. Phenotypic plasticity has been proposed as an important driver of colonization success, but the evidence has been mixed. We examined plasticity and seed output in the globally distributed plant Arabidopsis thaliana. Accessions that differ in their colonization history (recent colonizers of North America, post-glacial colonizers of Eurasia, and relicts with no history of recent colonization) were grown under three treatments: fertilizer, competition, and herbivory in a full factorial design greenhouse study. We measured eight traits to quantify plasticity and three traits to quantify fitness. Plasticity did not significantly differ by colonization history, nor between accessions of the same genetic cluster in native vs. introduced ranges. Eurasian and North American colonizers had similar seed output in most environments while North American colonizers had higher seed output than relicts. Eurasian colonizers and relicts had similar seed outputs except under fertilizer, where Eurasian colonizer seed output was higher. Our results suggest that colonization has not served as a filtering mechanism in which more plastic individuals are favored; however, phenotypic plasticity that may have aided colonization may not persist in the post-colonization period. Higher seed output in North American and Eurasian colonizers relative to relicts suggests that selection for elevated reproductive output may have pre-adapted these accessions for the more recent colonization of North America.