Krill excretion boosts microbial activity in the Southern Ocean.
Krill excretion boosts microbial activity in the Southern Ocean.
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DOI：
10.1371/journal.pone.0089391
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Gómez-Pinchetti JL
中科院分区：
文献类型：
--
作者：
Arístegui J;Duarte CM;Reche I;Gómez-Pinchetti JL
众所周知，南极磷虾会向水体释放大量的无机和有机营养物质。在这里，我们测试的作用，磷虾分泌的溶解产物在刺激异养细菌的基础上，三个实验，其中铵和有机排泄物释放的磷虾被添加到细菌组合，自由的食草动物。我们的研究结果表明，除了磷虾排泄产物（但不是单独的铵），在磷虾群中预期的水平，极大地刺激细菌，导致数量级的增长和生产。此外，他们认为，南大洋的细菌生长率受到资源限制的抑制，远远低于其潜力。磷虾是南大洋DOC的主要来源，在磷虾存在的情况下，细菌活性的增强将进一步增加与磷虾活性相关的再循环过程，导致高效的磷虾细菌再循环，这应该有利于刺激南大洋初级生产力高的时期。
Antarctic krill are known to release large amounts of inorganic and organic nutrients to the water column. Here we test the role of krill excretion of dissolved products in stimulating heterotrophic bacteria on the basis of three experiments where ammonium and organic excretory products released by krill were added to bacterial assemblages, free of grazers. Our results demonstrate that the addition of krill excretion products (but not of ammonium alone), at levels expected in krill swarms, greatly stimulates bacteria resulting in an order-of-magnitude increase in growth and production. Furthermore, they suggest that bacterial growth rate in the Southern Ocean is suppressed well below their potential by resource limitation. Enhanced bacterial activity in the presence of krill, which are major sources of DOC in the Southern Ocean, would further increase recycling processes associated with krill activity, resulting in highly efficient krill-bacterial recycling that should be conducive to stimulating periods of high primary productivity in the Southern Ocean.
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DOI：
10.1016/j.dsr2.2011.06.008
发表时间：
2012-01-01
影响因子：
3
作者：
Atkinson, A.;Schmidt, K.;Geissler, P. A.
通讯作者：
Geissler, P. A.
影响因子：
2.5
作者：
GOEYENS, L;TREGUER, P;BAEYENS, W
通讯作者：
BAEYENS, W
影响因子：
2.8
作者：
Ducklow, Hugh W.;Schofield, Oscar;Erickson, Matthew
通讯作者：
Erickson, Matthew
影响因子：
2.5
作者：
Atkinson, A;Snyder, R
通讯作者：
Snyder, R
DOI：
10.1016/j.dsr2.2001.01.003
发表时间：
2004-01-01
影响因子：
3
作者：
Granéli, W;Carlsson, P;Bertilsson, S
通讯作者：
Bertilsson, S