Larval and adult traits coevolve in response to asymmetric coastal currents to shape marine dispersal kernels
Larval and adult traits coevolve in response to asymmetric coastal currents to shape marine dispersal kernels
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幼虫和成虫特征响应不对称海岸流共同进化，形成海洋传播核心
DOI：
10.1086/728003
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Burgess, Scott C.
中科院分区：
文献类型：
--
作者：
Peniston, Jimmy H.;Burgess, Scott C.
扩散是生物体特征和外部强迫的结果。然而，目前还不清楚如何新兴的扩散内核演变为选择的副产品的基本特征。这一问题在沿海海洋系统中尤其引人注目，因为在沿海海洋系统中，扩散与发育和繁殖有关，定向海流使下游的幼虫扩散产生偏差，从而导致选择保留。我们模拟了一个集合种群的动态沿着有限的海岸线使用积分投影模型和自适应动力学，以了解如何不对称的沿岸流影响的演变的幼虫（远洋幼虫持续时间）和成人（产卵频率）的生活史特征，间接塑造的演变的海洋扩散内核。沿岸流引起的选择有利于释放的幼虫在多个时间段，允许长的浮游幼虫的持续时间和长距离的传播，以保持在海洋生命周期的情况下，他们以前预测将选择反对。两个进化稳定的策略出现：一个具有较长的浮游幼虫持续时间和许多产卵事件，导致在一个扩散核具有较大的平均值和方差，另一个具有较短的浮游幼虫持续时间和产卵事件很少，导致在一个扩散核具有较小的平均值和方差。我们的理论表明，沿海洋流是如何重要的选择代理，可以产生多个，往往共同发生的进化结果的海洋生物的历史特征，影响扩散。
Dispersal emerges as an outcome of organismal traits and external forcings. However, it remains unclear how the emergent dispersal kernel evolves as a by-product of selection on the underlying traits. This question is particularly compelling in coastal marine systems, where dispersal is tied to development and reproduction and where directional currents bias larval dispersal downstream, causing selection for retention. We modeled the dynamics of a metapopulation along a finite coastline using an integral projection model and adaptive dynamics to understand how asymmetric coastal currents influence the evolution of larval (pelagic larval duration) and adult (spawning frequency) life history traits, which indirectly shape the evolution of marine dispersal kernels. Selection induced by alongshore currents favors the release of larvae over multiple time periods, allowing long pelagic larval durations and long-distance dispersal to be maintained in marine life cycles in situations where they were previously predicted to be selected against. Two evolutionarily stable strategies emerged: one with a long pelagic larval duration and many spawning events, resulting in a dispersal kernel with a larger mean and variance, and another with a short pelagic larval duration and few spawning events, resulting in a dispersal kernel with a smaller mean and variance. Our theory shows how coastal ocean flows are important agents of selection that can generate multiple, often co-occurring evolutionary outcomes for marine life history traits that affect dispersal.