Carbonate compensation depth drives abyssal biogeography in the northeast Pacific.
Carbonate compensation depth drives abyssal biogeography in the northeast Pacific.
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DOI：
10.1038/s41559-023-02122-9
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发表时间：
2023-09
影响因子：
16.8
通讯作者：
中科院分区：
文献类型：
--
作者：
深海海底群落覆盖了地球表面的60%以上。尽管深海平原面积巨大，但与其他海洋生态系统相比，其环境梯度并不高。然而，人们对管理生物多样性或可能在区域范围内划定深海生态地理界限的模式和过程知之甚少。随着深海大范围人为干扰的威胁增加，迫切需要改善对偏远深海环境的宏观生态认识。在这里，我们使用一个新的，盆地规模的数据集，以显示在克拉里昂-克利珀顿区（太平洋东北部），一个针对深海采矿的区域的5 000公里跨度的深海社区存在明确的区域分带。我们发现了两个明显的海洋地理区，深海区和浅深海区，由4，300米至4，800米深度之间的过渡带分隔。令人惊讶的是，物种丰富度保持在这一边界的门级分类的替代品。这些区域的过渡可能与碳酸钙饱和边界有关，因为依赖于碳酸钙结构的类群，如有壳的软体动物，似乎仅限于较浅的省份。我们的研究结果表明，地球化学和气候强迫分布的深海种群在大的空间尺度上，并提供了一个潜在的模式，深海宏观生态，开辟了一个新的基础，区域规模的生物多样性研究和保护战略，在地球上最大的生物群落。作者分析了横跨太平洋东北部克拉里昂-克利珀顿区深海平原的5 000公里海底图像数据和超过50 000个巨型动物标本，确定了两个不同的生物地理区，其中依赖碳酸钙结构的分类群仅限于4 300 - 4 880米以上的深度。
Abyssal seafloor communities cover more than 60% of Earth’s surface. Despite their great size, abyssal plains extend across modest environmental gradients compared to other marine ecosystems. However, little is known about the patterns and processes regulating biodiversity or potentially delimiting biogeographical boundaries at regional scales in the abyss. Improved macroecological understanding of remote abyssal environments is urgent as threats of widespread anthropogenic disturbance grow in the deep ocean. Here, we use a new, basin-scale dataset to show the existence of clear regional zonation in abyssal communities across the 5,000 km span of the Clarion–Clipperton Zone (northeast Pacific), an area targeted for deep-sea mining. We found two pronounced biogeographic provinces, deep and shallow-abyssal, separated by a transition zone between 4,300 and 4,800 m depth. Surprisingly, species richness was maintained across this boundary by phylum-level taxonomic replacements. These regional transitions are probably related to calcium carbonate saturation boundaries as taxa dependent on calcium carbonate structures, such as shelled molluscs, appear restricted to the shallower province. Our results suggest geochemical and climatic forcing on distributions of abyssal populations over large spatial scales and provide a potential paradigm for deep-sea macroecology, opening a new basis for regional-scale biodiversity research and conservation strategies in Earth’s largest biome. Analysing seabed imagery data spanning 5,000 km and >50,000 megafaunal specimens across the Clarion–Clipperton Zone abyssal plain in the northeast Pacific, the authors identify two distinct biogeographical provinces in which taxa that are dependent on calcium carbonate structures are restricted to depths above 4,300–4,880 m.
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UKSRL勘探合同区域的Megafauna和太平洋的Eastern Clarion-Clipperton区：Annelida，Arthropoda，Bryozoa，Chordata，Cenordata，Ctenophora，Mollusca。
影响因子：
1.3
作者：
Amon DJ;Ziegler AF;Drazen JC;Grischenko AV;Leitner AB;Lindsay DJ;Voight JR;Wicksten MK;Young CM;Smith CR
通讯作者：
Smith CR
影响因子：
1.3
作者：
Bribiesca-Contreras G;Dahlgren TG;Amon DJ;Cairns S;Drennan R;Durden JM;Eléaume MP;Hosie AM;Kremenetskaia A;McQuaid K;O'Hara TD;Rabone M;Simon-Lledó E;Smith CR;Watling L;Wiklund H;Glover AG
通讯作者：
Glover AG
影响因子：
2.9
作者：
Harris, P. T.;Macmillan-Lawler, M.;Baker, E. K.
通讯作者：
Baker, E. K.
DOI：
10.1029/jc081i015p02617
发表时间：
1976-01-01
期刊：
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS AND ATMOSPHERES
影响因子：
--
作者：
BERGER, WH;ADELSECK, CG;MAYER, LA
通讯作者：
MAYER, LA
影响因子：
4.6
作者：
Aleynik D;Inall ME;Dale A;Vink A
通讯作者：
Vink A