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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Complex larval connectivity patterns among marine invertebrate populations
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Complex larval connectivity patterns among marine invertebrate populations

机译：海洋无脊椎动物种群中复杂的幼虫连通性模式

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摘要

Based on the belief that marine larvae, which can spend days to months in the planktonic stage, could be transported considerable distances by ocean currents, it has long been assumed that populations of coastal species with a planktonic larval stage are demograph-ically open and highly "connected." Such assumptions about the connectivity of coastal populations govern approaches to managing marine resources and shape our fundamental understanding of population dynamics and evolution, yet are rarely tested directly due to the small size and high mortality of marine larvae in a physically complex environment. Here, we document a successful application of elemental fingerprinting as a tracking tool to determine sources of settled invertebrates and show that coastal mussel larvae, previously thought to be highly dispersed, can be retained within 20-30 km of their natal origin. We compare two closely related and co-occurring species, Mytilus californianus and Mytilus galloprovincialis, and determine that, despite expected similarities, they exhibit substantially different connectivity patterns. Our use of an in situ larval culturing technique overcomes the previous challenge of applying microchem-ical tracking methods to species with completely planktonic development. The exchange of larvae and resulting connectivities among marine populations have fundamental consequences for the evolution and ecology of species and for the management of coastal resources.
机译：基于这样的信念，即在浮游阶段可能花费数天至数月的海洋幼体可以被洋流运送相当远的距离，长期以来一直认为具有浮游幼体阶段的沿海物种种群在人口统计学上是开放的且高度“连接的。”这种关于沿海人口连通性的假设决定了管理海洋资源的方式，并塑造了我们对人口动态和演变的基本理解，但是由于在复杂的物理环境中海洋幼体的体积小且死亡率高，因此很少直接进行检验。在这里，我们记录了元素指纹图谱作为跟踪工具来确定定居无脊椎动物的来源的成功应用，并显示出以前被认为高度分散的沿海贻贝幼虫可以保留在其出生地的20-30 km之内。我们比较了两个密切相关和共同存在的物种，加州牧羊犬和盖洛省牧羊犬，并确定，尽管预期相似，但它们展现出实质上不同的连通性模式。我们使用原位幼虫培养技术克服了以前的挑战，即对具有完全浮游发育的物种应用微化学跟踪方法。海洋种群之间的幼体交换以及由此产生的连通性对物种的进化和生态以及沿海资源的管理产生了根本性的影响。

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