Protistan grazing impacts microbial communities and carbon cycling at deep-sea hydrothermal vents
Protistan grazing impacts microbial communities and carbon cycling at deep-sea hydrothermal vents
复制标题
原生生物放牧影响深海热液喷口的微生物群落和碳循环
DOI:
10.1073/pnas.2102674118
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Huber, Julie A.
中科院分区:
文献类型:
--
作者:
Hu, Sarah K.;Herrera, Erica L.;Smith, Amy R.;Pachiadaki, Maria G.;Edgcomb, Virginia P.;Sylva, Sean P.;Chan, Eric W.;Seewald, Jeffrey S.;German, Christopher R.;Huber, Julie A.
Microbial eukaryotes (or protists) in marine ecosystems are a link between primary producers and all higher trophic levels, and the rate at which heterotrophic protistan grazers consume microbial prey is a key mechanism for carbon transport and recycling in microbial food webs. At deep-sea hydrothermal vents, chemosynthetic bacteria and archaea form the base of a food web that functions in the absence of sunlight, but the role of protistan grazers in these highly productive ecosystems is largely unexplored. Here, we pair grazing experiments with a molecular survey to quantify protistan grazing and to characterize the composition of vent-associated protists in low-temperature diffuse venting fluids from Gorda Ridge in the northeast Pacific Ocean. Results reveal protists exert higher predation pressure at vents compared to the surrounding deep seawater environment and may account for consuming 28 to 62% of the daily stock of prokaryotic biomass within discharging hydrothermal vent fluids. The vent-associated protistan community was more species rich relative to the background deep sea, and patterns in the distribution and co-occurrence of vent microbes provide additional insights into potential predator–prey interactions. Ciliates, followed by dinoflagellates, Syndiniales, rhizaria, and stramenopiles, dominated the vent protistan community and included bacterivorous species, species known to host symbionts, and parasites. Our findings provide an estimate of protistan grazing pressure within hydrothermal vent food webs, highlighting the important role that diverse protistan communities play in deep-sea carbon cycling.
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影响因子:
3.7
作者:
Rocke E;Pachiadaki MG;Cobban A;Kujawinski EB;Edgcomb VP
通讯作者:
Edgcomb VP
DOI:
10.1038/ismej.2012.8
发表时间:
2012-08
期刊:
The ISME journal
影响因子:
--
作者:
通讯作者:
--
影响因子:
2.4
作者:
V. Milesi;E. Shock;T. Ely;M. Lubetkin;S. Sylva;J. Huber;Amy R. Smith;S. Nawotniak;Z. Mirmalek;C. German;D. Lim
通讯作者:
D. Lim
影响因子:
1.4
作者:
P. Lavrentyev;Wayne S Gardner;J. Johnson
通讯作者:
J. Johnson
影响因子:
2.9
作者:
Alexandra Schoenle;Manon Hohlfeld;M. Rosse;P. Filz;C. Wylezich;F. Nitsche;H. Arndt
通讯作者:
H. Arndt