O'Hara Timothy D, Hugall Andrew F, Haines Margaret L, Weber Alexandra A-T, Eichsteller Angelina, Brogger Martin I, Eléaume Marc, Fujita Toshihiko, Kongsrud Jon A, Martinez Arbizu Pedro, Mills Sadie, Olbers Jennifer M, Paulay Gustav, Ramil Fran, Samadi Sarah, Sands Chester J, Sellanes Javier, Solis-Marin Francisco A, Moussalli Adnan
Museums Victoria, Melbourne, Victoria, Australia.
Department of Aquatic Ecology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
Nature. 2025 Jul 23. doi: 10.1038/s41586-025-09307-1.
Our knowledge of biogeographic patterns and processes in the deep sea has been limited by the lack of integrated datasets that cover its vast extent. Here we analyse a new global dataset of genomic DNA sequences, spanning an entire taxonomic class of benthic invertebrates (Ophiuroidea), to obtain a broad understanding of phylogenetic divergence and biotic movement across all oceans, from coastal margins down to the abyssal plains. We show that regional faunas on the continental shelf are phylogenetically divergent, particularly at temperate and tropical latitudes. By contrast, assemblages in the deep sea are much more connected. Many temperate deep-sea lineages have achieved distribution ranges across the planet, including over the Quaternary period. A close relationship exists between deep-sea faunas of the northern Atlantic and, on the opposite side of the globe, southern Australia. Bathymetric interchange is not only reliant on vertical migration through isothermal polar waters but also occurs across the thermal depth gradients of tropical regions. The connected nature of deep-sea life should be an important consideration in marine conservation assessments.
由于缺乏覆盖广阔深海区域的综合数据集，我们对深海生物地理模式和过程的了解一直有限。在此，我们分析了一个新的全球基因组DNA序列数据集，该数据集涵盖了整个底栖无脊椎动物分类纲（蛇尾纲），以全面了解所有海洋中从海岸边缘到深海平原的系统发育分歧和生物迁移情况。我们发现大陆架上的区域动物群在系统发育上存在分歧，特别是在温带和热带纬度地区。相比之下，深海中的生物群落联系更为紧密。许多温带深海谱系已经在全球范围内实现了分布，包括在第四纪时期。北大西洋的深海动物群与地球另一端的澳大利亚南部的深海动物群之间存在着密切的关系。深度互换不仅依赖于通过等温极地水域的垂直迁移，也发生在热带地区的热深度梯度上。深海生物的这种相互联系的性质在海洋保护评估中应是一个重要的考虑因素。
