Increased appendicularian zooplankton alter carbon cycling under warmer more acidified ocean conditions

Increased appendicularian zooplankton alter carbon cycling under warmer more acidified ocean conditions
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在温暖、酸化的海洋条件下,附肢浮游动物年龄碳循环增加

DOI:
10.1002/lno.10516
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发表时间:
2017
影响因子:
4.5
通讯作者:
Thompson E
Thompson E
中科院分区:
地球科学1区
文献类型:
--
作者:
Winder M;Bermudez JR;Bouquet JM;Hansen T;Brandes J;Berger S;Sazhin A; Jens C. Nejstgaard;Ulf BåmstedtHans H. Jakobsen;Jörg Dutz;Frischer ME;Troedsson C;Thompson E

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人为的大气二氧化碳负荷引起了人们对海洋温度升高和酸化对生物过程的综合影响的关注。与传统桡足动物为主的食物网相比,尾纲浮游动物对气候变化的响应可能具有重要的生态系统意义,因为它们可以改变生物地球化学循环。然而,尾虫对多种气候驱动因素的响应及其对碳循环的影响尚不清楚。在此,我们研究了胶状浮游动物(尾虫)如何在未来气候情景预测的条件下影响海洋食物网的碳循环。尾虫在温暖的环境中表现良好,并受益于低pH值,这反过来改变了碳流的方向。增加的尾虫从水柱中移走了一些颗粒,这些颗粒可能会通过增加过滤室和粪便颗粒向深处的碳运输来滋养桡足类动物。这有助于从大气中去除二氧化碳,也可能对渔业产生影响。
Anthropogenic atmospheric loading of CO2raises concerns about combined effects of increasing ocean temperature and acidification, on biological processes. In particular, the response of appendicularian zooplankton to climate change may have significant ecosystem implications as they can alter biogeochemical cycling compared to classical copepod dominated food webs. However, the response of appendicularians to multiple climate drivers and effect on carbon cycling are still not well understood. Here, we investigated how gelatinous zooplankton (appendicularians) affect carbon cycling of marine food webs under conditions predicted by future climate scenarios. Appendicularians performed well in warmer conditions and benefited from low pH levels, which in turn altered the direction of carbon flow. Increased appendicularians removed particles from the water column that might otherwise nourish copepods by increasing carbon transport to depth from continuous discarding of filtration houses and fecal pellets. This helps to remove CO2from the atmosphere, and may also have fisheries implications.
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