Pre- and post-eruption diffuse flow variability among tubeworm habitats at 9°50′ north on the East Pacific Rise

Nees, Heather A.; Lutz, Richard A.; Shank, Timothy M.; Luther, George W.

doi:10.1016/j.dsr2.2009.05.007

Cited by 21 publications

(31 citation statements)

References 28 publications

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“…The Riftia plumes were more distant from the basalt rock and thus from the hydrothermal diffuse flow at the base of the bush, while Tevnia tubes appeared more curved and their plumes were located closer to the hydrothermal outflow (Supplementary Figure S1). The gradient observed at plume level between the tube worm species in the sampled bush is consistent with the more general results of Nees et al (2009) obtained from several tubeworm aggregations, who also showed that Tevnia plumes were exposed to both higher sulfide and lower oxygen concentrations compared with the Riftia plumes when both tube worm species were co-existing at 91N East Pacific Rise in 2007.…”

Section: Resultssupporting

confidence: 77%

“…These observations are consistent with the more complete measurement series previously presented by Nees et al (2009). A rather large s.d.…”

Section: General Genome Characteristicssupporting

confidence: 81%

“…As the flux decreases and physicochemical properties of the fluid change over time, individuals of Riftia pachyptila (Giant tubeworm; Jones, 1981a) begin to colonize the same vent sites (Shank et al, 1998). R. pachyptila preferentially thrives in zones characterized by higher oxygen and lower sulfide concentrations, eventually replacing T. jerichonana at these vents (Nees et al, 2009). However, in contrast to their different colonization behavior, the two closely related siboglinid tubeworms (Pleijel et al, 2009) were shown to harbor conspecific chemoautotrophic endosymbionts (Edwards and Nelson, 1991;Cary et al, 1993;Di Meo et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…In this sequential process, the tubeworm Tevnia jerichonana (Jericho worm; Jones, 1985) stands out as an early colonizer of post-eruptive basalt-hosted vents (Mullineaux et al, 2000). The pioneer species colonizes areas of vigorous diffuse hydrothermal flow characterized by microaerobic conditions, and relatively high levels of sulfide and, potentially, heavy metals (Von Damm et al, 1995;Shank et al, 2006;Moore et al, 2009;Nees et al, 2009). As the flux decreases and physicochemical properties of the fluid change over time, individuals of Riftia pachyptila (Giant tubeworm; Jones, 1981a) begin to colonize the same vent sites (Shank et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Physiological homogeneity among the endosymbionts of Riftia pachyptila and Tevnia jerichonana revealed by proteogenomics

et al. 2011

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The two closely related deep-sea tubeworms Riftia pachyptila and Tevnia jerichonana both rely exclusively on a single species of sulfide-oxidizing endosymbiotic bacteria for their nutrition. They do, however, thrive in markedly different geochemical conditions. A detailed proteogenomic comparison of the endosymbionts coupled with an in situ characterization of the geochemical environment was performed to investigate their roles and expression profiles in the two respective hosts. The metagenomes indicated that the endosymbionts are genotypically highly homogeneous. Gene sequences coding for enzymes of selected key metabolic functions were found to be 99.9% identical. On the proteomic level, the symbionts showed very consistent metabolic profiles, despite distinctly different geochemical conditions at the plume level of the respective hosts. Only a few minor variations were observed in the expression of symbiont enzymes involved in sulfur metabolism, carbon fixation and in the response to oxidative stress. Although these changes correspond to the prevailing environmental situation experienced by each host, our data strongly suggest that the two tubeworm species are able to effectively attenuate differences in habitat conditions, and thus to provide their symbionts with similar micro-environments.

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Section: Resultssupporting

confidence: 77%

“…These observations are consistent with the more complete measurement series previously presented by Nees et al (2009). A rather large s.d.…”

Section: General Genome Characteristicssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physiological homogeneity among the endosymbionts of Riftia pachyptila and Tevnia jerichonana revealed by proteogenomics

et al. 2011

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“…Over the past several decades, a large number of studies have observed episodic and periodic variations in long-term monitoring of venting temperature, flow rate, and chemical compositions at both low-and high-temperature hydrothermal systems over a broad range of time scales [e.g., Little et al, 1988;Schultz et al, 1996;Sohn et al, 1998;Tivey et al, 2002;Scheirer et al, 2006;Larson et al, 2007Larson et al, , 2009Nees et al, 2009;Crone et al, 2010;Barreyre et al, 2014b]. In particular, spectral analysis has identified strong tidal signatures in hydrothermal venting in many of these studies.…”

Section: Introductionmentioning

confidence: 99%

A preliminary 1‐D model investigation of tidal variations of temperature and chlorinity at the Grotto mound, Endeavour Segment, Juan de Fuca Ridge

Larson

Bemis

et al. 2017

Geochem Geophys Geosyst

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Tidal oscillations of venting temperature and chlorinity have been observed in the long-term time series data recorded by the Benthic and Resistivity Sensors (BARS) at the Grotto mound on the Juan de Fuca Ridge. In this study, we use a one-dimensional two-layer poroelastic model to conduct a preliminary investigation of three hypothetical scenarios in which seafloor tidal loading can modulate the venting temperature and chlorinity at Grotto through the mechanisms of subsurface tidal mixing and/or subsurface tidal pumping. For the first scenario, our results demonstrate that it is unlikely for subsurface tidal mixing to cause coupled tidal oscillations in venting temperature and chlorinity of the observed amplitudes. For the second scenario, the model results suggest that it is plausible that the tidal oscillations in venting temperature and chlorinity are decoupled with the former caused by subsurface tidal pumping and the latter caused by subsurface tidal mixing, although the mixing depth is not well constrained. For the third scenario, our results suggest that it is plausible for subsurface tidal pumping to cause coupled tidal oscillations in venting temperature and chlorinity. In this case, the observed tidal phase lag between venting temperature and chlorinity is close to the poroelastic model prediction if brine storage occurs throughout the upflow zone under the premise that layers 2A and 2B have similar crustal permeabilities. However, the predicted phase lag is poorly constrained if brine storage is limited to layer 2B as would be expected when its crustal permeability is much smaller than that of layer 2A.

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Temporal trends in vent fluid iron and sulfide chemistry following the 2005/2006 eruption at East Pacific Rise, 9°50′N

Yücel

Luther

2013

Geochem Geophys Geosyst

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[1] The chemistry of vent fluids that emanate to the seafloor undergoes dramatic changes after volcanic eruptions. Data on these changes are still limited, but the best studied example is the East Pacific Rise (EPR) at 9 50 0 N, where the temporal evolution of the vent fluid chemistry after the 1991/1992 eruption was documented. The area underwent another eruption sequence during late 2005/early 2006, and here we show that a similar evolution is recurring in the iron and sulfide contents of the high-temperature fluids sampled in June 2006, January 2007, and June 2008. The vents have had increasing dissolved iron and decreasing acid-volatile sulfide (free sulfide plus FeS) concentrations with 1 order of magnitude variation. In addition, chromium reducible sulfide (mainly pyrite) also had fivefold decreasing concentrations over the 3 years. Our results confirm a pattern that was noted only once before for 9 50 0 N EPR and emphasize the dramatic yearly variability in the concentrations of iron-sulfur species emanating from vents.

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Pre- and post-eruption diffuse flow variability among tubeworm habitats at 9°50′ north on the East Pacific Rise

Cited by 21 publications

References 28 publications

Physiological homogeneity among the endosymbionts of Riftia pachyptila and Tevnia jerichonana revealed by proteogenomics

Physiological homogeneity among the endosymbionts of Riftia pachyptila and Tevnia jerichonana revealed by proteogenomics

A preliminary 1‐D model investigation of tidal variations of temperature and chlorinity at the Grotto mound, Endeavour Segment, Juan de Fuca Ridge

Temporal trends in vent fluid iron and sulfide chemistry following the 2005/2006 eruption at East Pacific Rise, 9°50′N

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