Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
文献类型： 外文期刊
作者： Pauli, Nora-Charlotte 1 ; Flintrop, Clara M. 2 ; Konrad, Christian 2 ; Pakhomov, Evgeny A. 5 ; Swoboda, Steffen 3 ; Koch, Florian 2 ; Wang, Xin-Liang 8 ; Zhang, Ji-Chang 8 ; Brierley, Andrew S. 9 ; Bernasconi, Matteo 9 ; Meyer, Bettina 1 ; Iversen, Morten H. 2 ;
作者机构： 1.Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, Carl von Ossietzky Str 9-11, D-26111 Oldenburg, Germany
2.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany
3.MARUM, Leobener Str 8, D-28359 Bremen, Germany
4.Univ Bremen, Leobener Str 8, D-28359 Bremen, Germany
5.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, 2207 Main Mall, Vancouver, BC V6T 1Z4, Canada
6.Univ British Columbia, Inst Oceans & Fisheries, 2202 Main Mall, Vancouver, BC V6T 1Z4, Canada
7.Hakai Inst, POB 25039, Campbell River, BC V9W 0B7, Canada
8.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, 106 Nanjing Rd, Qingdao 266071, Peoples R China
9.Univ St Andrews, Pelag Ecol Res Grp, Gatty Marine Lab, Scottish Oceans Inst,Sch Biol, St Andrews KY16 8LB, Fife, Scotland
10.Helmholtz Inst Funct Marine Biodivers HIFMB, Ammerlander Heerstr 231, D-26129 Oldenburg, Germany
期刊名称：NATURE COMMUNICATIONS （ 影响因子：17.694； 五年影响因子：17.763 ）
ISSN：
年卷期： 2021 年 12 卷 1 期
页码：
收录情况： SCI
摘要： Zooplankton impact Southern Ocean carbon cycling. Here, the authors examine carbon export at the Antarctic Peninsula, finding that krill pellets are efficiently exported, while salp pellets are retained and recycled in surface waters. Krill and salps are important for carbon flux in the Southern Ocean, but the extent of their contribution and the consequences of shifts in dominance from krill to salps remain unclear. We present a direct comparison of the contribution of krill and salp faecal pellets (FP) to vertical carbon flux at the Antarctic Peninsula using a combination of sediment traps, FP production, carbon content, microbial degradation, and krill and salp abundances. Salps produce 4-fold more FP carbon than krill, but the FP from both species contribute equally to the carbon flux at 300 m, accounting for 75% of total carbon. Krill FP are exported to 72% to 300 m, while 80% of salp FP are retained in the mixed layer due to fragmentation. Thus, declining krill abundances could lead to decreased carbon flux, indicating that the Antarctic Peninsula could become a less efficient carbon sink for anthropogenic CO2 in future.
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