Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Nova Scotia B2Y 4A2, Canada.
Department of Computer Science, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
Sci Adv. 2018 Mar 28;4(3):eaaq0929. doi: 10.1126/sciadv.aaq0929. eCollection 2018 Mar.
The spatial genetic structure of most species in the open marine environment remains largely unresolved. This information gap creates uncertainty in the sustainable management, recovery, and associated resilience of marine communities and our capacity to extrapolate beyond the few species for which such information exists. We document a previously unidentified multispecies biogeographic break aligned with a steep climatic gradient and driven by seasonal temperature minima in the northwest Atlantic. The coherence of this genetic break across our five study species with contrasting life histories suggests a pervasive macroecological phenomenon. The integration of this genetic structure with habitat suitability models and climate forecasts predicts significant variation in northward distributional shifts among populations and availability of suitable habitat in future oceans. The results of our integrated approach provide new perspective on how cryptic intraspecific diversity associated with climatic variation influences species and community response to climate change beyond simple poleward shifts.
在开阔海洋环境中，大多数物种的空间遗传结构在很大程度上仍未得到解决。这一信息空白给海洋生物群落的可持续管理、恢复以及相关的弹性带来了不确定性，也限制了我们超越少数已知物种进行推断的能力。我们记录了一个以前未被识别的多物种生物地理断裂带，该断裂带与北大西洋西北部陡峭的气候梯度一致，由季节性最低温度驱动。我们的五个研究物种的遗传断裂带具有相似的生活史，这表明这是一种普遍的宏观生态现象。将这种遗传结构与栖息地适宜性模型和气候预测相结合，预测了未来海洋中种群向北分布转移以及适宜栖息地可用性的显著变化。我们综合方法的结果提供了新的视角，即与气候变化相关的隐种内多样性如何影响物种和群落对气候变化的反应，而不仅仅是简单的向极移动。
