Evolutionary history of Pacific salmon in dynamic environments.
Evolutionary history of Pacific salmon in dynamic environments.
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DOI：
10.1111/j.1752-4571.2008.00023.x
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发表时间：
2008-05
影响因子：
4.1
通讯作者：
Beechie T
中科院分区：
文献类型：
--
作者：
Waples RS;Pess GR;Beechie T
太平洋鲑鱼的现代进化最好从物种的进化历史和它们所居住的动态生态系统的角度来看待。物种形成在中新世晚期完成，留下c。600万年的物种内多样化。在最近的冰川最大期之后，大面积的地区成为可供沙漠化的地区。因此，目前的种内多样性是最近进化的产物，覆盖在更新世冰期反复发作期间形成的不同的历史谱系上。在北美西北部，主要的栖息地特征在过去的5000年中一直相对稳定，但鲑鱼生态系统仍然动态，因为干扰制度（火山爆发，山体滑坡，野火，洪水，海洋和淡水生产力的变化）发生在各种时间和空间尺度。这些干扰都创造了选择性的压力，鲑鱼的适应性反应和抑制长期的分歧，定期灭绝当地人口和创造情节分散事件，侵蚀新兴的差异。最近的人为变化在整个景观中普遍复制，并中断了允许自然栖息地恢复的过程。如果人为的变化可以塑造产生干扰制度，更密切地模仿（在空间和时间）下的物种进化，太平洋鲑鱼应该是装备精良，以应对未来的挑战，就像他们在整个进化历史。
Contemporary evolution of Pacific salmon (Oncorhynchus spp.) is best viewed in the context of the evolutionary history of the species and the dynamic ecosystems they inhabit. Speciation was complete by the late Miocene, leaving c. six million years for intraspecific diversification. Following the most recent glacial maximum, large areas became available for recolonization. Current intraspecific diversity is thus the product of recent evolution overlaid onto divergent historical lineages forged during recurrent episodes of Pleistocene glaciation. In northwestern North America, dominant habitat features have been relatively stable for the past 5000 years, but salmon ecosystems remain dynamic because of disturbance regimes (volcanic eruptions, landslides, wildfires, floods, variations in marine and freshwater productivity) that occur on a variety of temporal and spatial scales. These disturbances both create selective pressures for adaptive responses by salmon and inhibit long-term divergence by periodically extirpating local populations and creating episodic dispersal events that erode emerging differences. Recent anthropogenic changes are replicated pervasively across the landscape and interrupt processes that allow natural habitat recovery. If anthropogenic changes can be shaped to produce disturbance regimes that more closely mimic (in both space and time) those under which the species evolved, Pacific salmon should be well-equipped to deal with future challenges, just as they have throughout their evolutionary history.
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影响因子：
5.9
作者：
Beechie, Timothy;Buhle, Eric;Holsinger, Lisa
通讯作者：
Holsinger, Lisa
影响因子：
5.4
作者：
Benda, L;Dunne, T
通讯作者：
Dunne, T
影响因子：
2
作者：
Beckman, BR;Dickhoff, WW
通讯作者：
Dickhoff, WW
影响因子：
5
作者：
Denoel, Mathieu;Ficetola, G. Francesco
通讯作者：
Ficetola, G. Francesco
影响因子：
3.3
作者：
Beechie, TJ
通讯作者：
Beechie, TJ