Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

 
Main Menu

· Home
· Contacts
· Data Systems
· Documents
· FAQ
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference

 

Register of Resources (RoR)

 People  |  Datasets  |  Literature  |  Institutes  |  Projects 

[ report an error in this record ]basket (1): add | show Print this page

one publication added to basket [350789]
Impact of shallow‐water hydrothermal seepage on benthic biogeochemical cycling, nutrient availability, and meiobenthic communities in a tropical coral reef
Lichtschlag, A.; Braeckman, U.; Guilini, K.; Ahmerkamp, S.; James, R.H.; de Beer, D. (2022). Impact of shallow‐water hydrothermal seepage on benthic biogeochemical cycling, nutrient availability, and meiobenthic communities in a tropical coral reef. Limnol. Oceanogr. 67(3): 567-584. https://dx.doi.org/10.1002/lno.12017
In: Limnology and Oceanography. American Society of Limnology and Oceanography: Waco, Tex., etc. ISSN 0024-3590; e-ISSN 1939-5590
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal

Authors  Top 
  • Lichtschlag, A.
  • Braeckman, U., more
  • Guilini, K., more
  • Ahmerkamp, S.
  • James, R.H.
  • de Beer, D.

Abstract
    We investigated the influence of high-CO2 hydrothermal seepage on element cycling, early diagenetic processes, and meiobenthic communities in sediments of a coral reef in Papua New Guinea. Based on fluid flow velocities, determined from temperature gradients, and element concentrations, the solute fluxes from the seeps were estimated, showing that seepage through sediments can be a source of nutrients but also of potentially toxic elements to the reef ecosystem. The sediment pore waters consisted of up to 36% hydrothermal fluids, enriched in As, Si, Li, Mn, Fe, Rb, and Cs relative to ambient seawater. During their ascent to the seabed, the acidic fluids reacted with the sediments, leading to increases in total alkalinity, nutrients, and alkali elements in the fluids. Mixing of hydrothermal fluids with seawater within the sediments lead to precipitation of redox-reactive species, including Fe-oxides, but the sediment pore waters were still a source of trace metals to the water column. Presence of the low-pH fluids in the sediments resulted in dissolution of sedimentary carbonates and left behind finer-grained volcanoclastic sands containing As, Cr, and Ni in concentrations toxic to biota. These finer-grained sediments had a reduced permeability, reducing the rate of remineralization of organic matter. Benthic meiofauna and nematode abundance and functional diversity were relatively lower at sites with hydrothermal seepage through the sediment. As benthic and pelagic processes are tightly coupled, it is likely that the changes in benthic biogeochemical processes due to sediment acidification will also affect epibenthic and pelagic communities.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors 


If any information here appears to be incorrect, please contact us
Back to Register of Resources
 
Quick links

MarBEF WIKI

Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)
Outreach

Science
Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca

WoRMS
part of WoRMS logo

ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin

EurOBIS

Geographic System

Datasets

 


Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact data-at-marbef.org