Genetic diversity and kelp forest vulnerability to climatic stress.
Genetic diversity and kelp forest vulnerability to climatic stress.
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DOI：
10.1038/s41598-018-20009-9
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发表时间：
2018-01-30
影响因子：
4.6
通讯作者：
Kelaher BP
中科院分区：
文献类型：
--
作者：
Wernberg T;Coleman MA;Bennett S;Thomsen MS;Tuya F;Kelaher BP
遗传多样性赋予种群在不断变化的条件下的适应能力，但其在调节气候变化影响方面的作用在大多数生态系统中仍未得到解决。对于基础物种来说，这种知识的缺乏尤其严重，它们的影响可能会波及整个生态系统。本研究将种群遗传学与生态生理和生态野外实验相结合，探讨了海带生态系统遗传多样性、生理和适应气候胁迫的纬度格局之间的关系。随后的“自然实验”说明了遗传多样性的纬度模式对生态系统对极端气候扰动（海洋热浪）的脆弱性的可能影响。不同纬度海带林的生理多样性、生态恢复力和遗传多样性之间存在密切的关系，遗传多样性在海带林对海洋热浪的响应中始终优于其他解释变量。因此，人口表现和对严重气候事件的脆弱性与遗传多样性的纬度格局密切相关，热浪使遗传多样性低的森林消失。在基础物种控制生态结构和功能的地方，气候压力的影响可以通过生态系统级联产生，因此，遗传多样性可能导致生态系统对气候变化的脆弱性。
Genetic diversity confers adaptive capacity to populations under changing conditions but its role in mediating impacts of climate change remains unresolved for most ecosystems. This lack of knowledge is particularly acute for foundation species, where impacts may cascade throughout entire ecosystems. We combined population genetics with eco-physiological and ecological field experiments to explore relationships among latitudinal patterns in genetic diversity, physiology and resilience of a kelp ecosystem to climate stress. A subsequent ‘natural experiment’ illustrated the possible influence of latitudinal patterns of genetic diversity on ecosystem vulnerability to an extreme climatic perturbation (marine heatwave). There were strong relationships between physiological versatility, ecological resilience and genetic diversity of kelp forests across latitudes, and genetic diversity consistently outperformed other explanatory variables in contributing to the response of kelp forests to the marine heatwave. Population performance and vulnerability to a severe climatic event were thus strongly related to latitudinal patterns in genetic diversity, with the heatwave extirpating forests with low genetic diversity. Where foundation species control ecological structure and function, impacts of climatic stress can cascade through the ecosystem and, consequently, genetic diversity could contribute to ecosystem vulnerability to climate change.
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影响因子：
4.6
作者：
Assis J;Berecibar E;Claro B;Alberto F;Reed D;Raimondi P;Serrão EA
通讯作者：
Serrão EA
影响因子：
5.9
作者：
Blackburn, TM;Hawkins, BA
通讯作者：
Hawkins, BA
影响因子：
1.8
作者：
Altamirano, M;Murakami, A;Kawai, H
通讯作者：
Kawai, H
中央和后边的种群同样容易受到变暖的影响。
影响因子：
16.6
作者：
Bennett S;Wernberg T;Arackal Joy B;de Bettignies T;Campbell AH
通讯作者：
Campbell AH
影响因子：
3.3
作者：
Assis, Jorge;Lucas, Ana Vaz;Serrao, Ester Alvares
通讯作者：
Serrao, Ester Alvares