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Title: Vacuolate-attached filaments: highly productive Ridgeia piscesae epibionts at the Juan de Fuca hydrothermal vents

Journal Article · · Marine Biology
 [1];  [2]
  1. Univ. of California, Davis, CA (United States). Dept. of Microbiology; Univ. of California, Davis, CA (United States). Dept. of Public Health Sciences
  2. Univ. of California, Davis, CA (United States). Dept. of Microbiology

Vacuolate sulfur bacteria with high morphological similarity to vacuolate-attached filaments previously described from shallow hydrothermal vents (White Point, CA) were found at deep-sea hydrothermal vents. These filamentous bacteria grow in dense mats that cover surfaces and potentially provide a significant source of organic carbon where they occur. Vacuolate-attached filaments were collected near vents at the Clam Bed site of the Endeavour Segment of the Juan de Fuca Ridge and from the sediment surface at Escanaba Trough on the Gorda Ridge. A phylogenetic analysis comparing their 16S rRNA gene sequences to those collected from the shallow White Point site showed that all vacuolate-attached filament sequences form a monophyletic group within the vacuolate sulfur-oxidizing bacteria clade in the gamma proteobacteria. Abundance of the attached filaments was quantified over the length of the exterior surface of the tubes of Ridgeia piscesae worms collected from the Clam Bed site at Juan de Fuca yielding a per worm average of 0.070 ± 0.018 cm3 (n = 4). In agreement with previous results for White Point filaments, anion measurements by ion chromatography showed no detectable internal nitrate concentrations above ambient seawater (n = 9). For one R. piscesae tube worm ‘‘bush’’ at the Easter Island vent site, potential gross epibiont productivity is estimated to be 15 to 459 the net productivity of the worms.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
FG03-00ER15077; NSF-9983119; NSF-0526653
OSTI ID:
1816637
Journal Information:
Marine Biology, Vol. 157, Issue 4; ISSN 0025-3162
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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Microbiota associated with tubes of Escarpia sp. from cold seeps in the southwestern Atlantic Ocean constitutes a community distinct from that of surrounding marine sediment and water journal November 2017
Niche differentiation among mat-forming, sulfide-oxidizing bacteria at cold seeps of the Nile Deep Sea Fan (Eastern Mediterranean Sea): Niche differentiation among sulfide oxidizers journal April 2011
A Review on the Phylogeography of Potentially Chemoautotrophic Bacteria from Major Vent and Seep Fauna and Their Contribution to Primary Production journal March 2018
Molecular study of bacterial diversity within the trophosome of the vestimentiferan tubeworm Ridgeia piscesae journal July 2014
How Clonal Is Clonal? Genome Plasticity across Multicellular Segments of a “Candidatus Marithrix sp.” Filament from Sulfidic, Briny Seafloor Sediments in the Gulf of Mexico journal August 2016
Unusual polyphosphate inclusions observed in a marine Beggiatoa strain journal September 2011
Phylogenetic and morphologic complexity of giant sulphur bacteria journal June 2013