Global reductions in seafloor biomass in response to climate change.
Global reductions in seafloor biomass in response to climate change.
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DOI：
10.1111/gcb.12480
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发表时间：
2014-06
影响因子：
11.6
通讯作者：
Gehlen M
中科院分区：
文献类型：
--
作者：
Jones DO;Yool A;Wei CL;Henson SA;Ruhl HA;Watson RA;Gehlen M
海底生物对健康的海洋生态系统至关重要，有助于元素循环、海底再矿化，并最终封存碳。深海生物主要依赖于表层海洋颗粒有机碳的出口通量来获取食物，但大多数海洋生物地球化学模型预测，21世纪人类活动导致的变暖导致全球出口通量下降。在这里，我们表明，与气候变化相关的碳出口的十年至世纪尺度的变化导致未来(2091-2100年)在RCP8.5下的全球开阔大洋海底生物量估计减少5.2%(减少5.2公吨C)，与当代条件(2006-2015年)相比。我们的预测使用了8个完全耦合地球系统模型的多模型平均出口通量估计，这些模型有助于耦合模型相互比较项目第5阶段，这些模型受到高和低代表性浓度路径(分别为RCP8.5和4.5)的强迫。这些出口通量估计结合已发表的经验关系来预测海底生物量的变化。极地海洋和一些上升流地区的海底生物量可能会增加，但其他大多数地区都出现了减少，东北大西洋部分地区的减少幅度高达38%。我们的分析预测，未来的海洋将拥有较小尺寸的底栖动物，这可能会通过海底多细胞食物网降低能量传输率。世界上已知的80%以上的潜在深水生物多样性热点，包括峡谷、海山和冷水珊瑚礁，预计将经历生物量的负面变化。生物量的这些重大减少可能导致底栖生态系统及其提供的功能和服务的广泛变化。
Seafloor organisms are vital for healthy marine ecosystems, contributing to elemental cycling, benthic remineralization, and ultimately sequestration of carbon. Deep-sea life is primarily reliant on the export flux of particulate organic carbon from the surface ocean for food, but most ocean biogeochemistry models predict global decreases in export flux resulting from 21st century anthropogenically induced warming. Here we show that decadal-to-century scale changes in carbon export associated with climate change lead to an estimated 5.2% decrease in future (2091–2100) global open ocean benthic biomass under RCP8.5 (reduction of 5.2 Mt C) compared with contemporary conditions (2006–2015). Our projections use multi-model mean export flux estimates from eight fully coupled earth system models, which contributed to the Coupled Model Intercomparison Project Phase 5, that have been forced by high and low representative concentration pathways (RCP8.5 and 4.5, respectively). These export flux estimates are used in conjunction with published empirical relationships to predict changes in benthic biomass. The polar oceans and some upwelling areas may experience increases in benthic biomass, but most other regions show decreases, with up to 38% reductions in parts of the northeast Atlantic. Our analysis projects a future ocean with smaller sized infaunal benthos, potentially reducing energy transfer rates though benthic multicellular food webs. More than 80% of potential deep-water biodiversity hotspots known around the world, including canyons, seamounts, and cold-water coral reefs, are projected to experience negative changes in biomass. These major reductions in biomass may lead to widespread change in benthic ecosystems and the functions and services they provide.
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影响因子：
3.7
作者：
Davies AJ;Guinotte JM
通讯作者：
Guinotte JM
影响因子：
4.9
作者：
Dunne, John P.;John, Jasmin G.;Zadeh, Niki
通讯作者：
Zadeh, Niki
DOI：
10.1098/rspb.2010.0462
发表时间：
2010-09-22
影响因子：
4.7
作者：
De Leo, Fabio C.;Smith, Craig R.;Clark, Malcolm R.
通讯作者：
Clark, Malcolm R.
影响因子：
30.7
作者：
Cheung, William W. L.;Sarmiento, Jorge L.;Pauly, Daniel
通讯作者：
Pauly, Daniel
影响因子：
64.8
作者：
Boyce, Daniel G.;Lewis, Marlon R.;Worm, Boris
通讯作者：
Worm, Boris