{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Hu SK"],"funding":["Center for Dark Energy Biosphere Investigations","NASA Planetary Science and Technology Through Analog Research","Charles E. Hollister Endowed Fund for Support of Innovative Research at Woods Hole Oceanographic Institution","C-DEBI Postdoctoral Fellowship","National Science Foundation"],"pagination":["wrae004"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10939315"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["18(1)"],"pubmed_abstract":["Deep-sea hydrothermal vent geochemistry shapes the foundation of the microbial food web by fueling chemolithoautotrophic microbial activity. Microbial eukaryotes (or protists) play a critical role in hydrothermal vent food webs as consumers and hosts of symbiotic bacteria, and as a nutritional source to higher trophic levels. We measured microbial eukaryotic cell abundance and predation pressure in low-temperature diffuse hydrothermal fluids at the Von Damm and Piccard vent fields along the Mid-Cayman Rise in the Western Caribbean Sea. We present findings from experiments performed under in situ pressure that show cell abundances and grazing rates higher than those done at 1 atmosphere (shipboard ambient pressure); this trend was attributed to the impact of depressurization on cell integrity. A relationship between the protistan grazing rate, prey cell abundance, and temperature of end-member hydrothermal vent fluid was observed at both vent fields, regardless of experimental approach. Our results show substantial protistan biomass at hydrothermally fueled microbial food webs, and when coupled with improved grazing estimates, suggest an important contribution of grazers to the local carbon export and supply of nutrient resources to the deep ocean."],"journal":["The ISME journal"],"pubmed_title":["Microbial eukaryotic predation pressure and biomass at deep-sea hydrothermal vents."],"pmcid":["PMC10939315"],"funding_grant_id":["OCE-1801036","OCE-1737173","OCE-1947776","OCE-0939564","OCE-1816652","OCE-185100","OCE-2327203","80NSSC17K0252"],"pubmed_authors":["Anderson RE","Serres MH","Pachiadaki MG","Seewald JS","Sylva SP","Hu SK","German CR","Huber JA","Lang SQ","Edgcomb VP"],"additional_accession":[]},"is_claimable":false,"name":"Microbial eukaryotic predation pressure and biomass at deep-sea hydrothermal vents.","description":"Deep-sea hydrothermal vent geochemistry shapes the foundation of the microbial food web by fueling chemolithoautotrophic microbial activity. Microbial eukaryotes (or protists) play a critical role in hydrothermal vent food webs as consumers and hosts of symbiotic bacteria, and as a nutritional source to higher trophic levels. We measured microbial eukaryotic cell abundance and predation pressure in low-temperature diffuse hydrothermal fluids at the Von Damm and Piccard vent fields along the Mid-Cayman Rise in the Western Caribbean Sea. We present findings from experiments performed under in situ pressure that show cell abundances and grazing rates higher than those done at 1 atmosphere (shipboard ambient pressure); this trend was attributed to the impact of depressurization on cell integrity. A relationship between the protistan grazing rate, prey cell abundance, and temperature of end-member hydrothermal vent fluid was observed at both vent fields, regardless of experimental approach. Our results show substantial protistan biomass at hydrothermally fueled microbial food webs, and when coupled with improved grazing estimates, suggest an important contribution of grazers to the local carbon export and supply of nutrient resources to the deep ocean.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Jan","modification":"2025-09-01T03:15:44.442Z","creation":"2025-09-01T03:08:25.835Z"},"accession":"S-EPMC10939315","cross_references":{"pubmed":["38366040"],"doi":["10.1093/ismejo/wrae004"]}}