Macroecological drivers of archaea and bacteria in benthic deep-sea ecosystems.
Macroecological drivers of archaea and bacteria in benthic deep-sea ecosystems.
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DOI：
10.1126/sciadv.1500961
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发表时间：
2016-04
期刊：
影响因子：
13.6
通讯作者：
Dell'Anno A
中科院分区：
文献类型：
--
作者：
Danovaro R;Molari M;Corinaldesi C;Dell'Anno A
深海底栖古细菌主要受温度控制，而细菌受食物可获得性控制。细菌和古细菌主导着所有纬度深海底栖生态系统的生物量，在全球生物地球化学循环中发挥着至关重要的作用，但它们的宏观格局和宏观生态驱动因素在很大程度上仍不清楚。我们展示了迄今进行的最广泛的实地研究的结果，该研究从228个样本中调查了底栖原核生物组合的分布和结构的模式和驱动因素，这些样本分布在34°N到79°N的纬度，深度约为400-5570米。我们提供的证据表明，在深海生态系统中，底栖细菌和古生物的丰度从中纬度到高纬度显著增加，古生菌的模式更明显，特别是第一海洋组塔乌姆考古群。我们的结果还表明，不同的微生物成分对温度条件和食物供应的变化表现出不同的敏感性。我们的结论是，气候变化将主要影响深海底栖古生物，对全球生物地球化学循环产生重要影响，特别是在高纬度地区。
Benthic deep-sea archaea are mainly controlled by temperature, whereas bacteria are controlled by food availability. Bacteria and archaea dominate the biomass of benthic deep-sea ecosystems at all latitudes, playing a crucial role in global biogeochemical cycles, but their macroscale patterns and macroecological drivers are still largely unknown. We show the results of the most extensive field study conducted so far to investigate patterns and drivers of the distribution and structure of benthic prokaryote assemblages from 228 samples collected at latitudes comprising 34°N to 79°N, and from ca. 400- to 5570-m depth. We provide evidence that, in deep-sea ecosystems, benthic bacterial and archaeal abundances significantly increase from middle to high latitudes, with patterns more pronounced for archaea, and particularly for Marine Group I Thaumarchaeota. Our results also reveal that different microbial components show varying sensitivities to changes in temperature conditions and food supply. We conclude that climate change will primarily affect deep-sea benthic archaea, with important consequences on global biogeochemical cycles, particularly at high latitudes.