High salinity tolerance of the Red Sea coral Fungia granulosa under desalination concentrate discharge conditions: an in situ photophysiology experiment

Handle URI:
http://hdl.handle.net/10754/336351
Title:
High salinity tolerance of the Red Sea coral Fungia granulosa under desalination concentrate discharge conditions: an in situ photophysiology experiment
Authors:
Van Der Merwe, Riaan; Röthig, Till ( 0000-0001-6359-8589 ) ; Voolstra, Christian R. ( 0000-0003-4555-3795 ) ; Ochsenkuhn, Michael A.; Lattemann, Sabine; Amy, Gary L.
Abstract:
Seawater reverse osmosis desalination concentrate may have chronic and/or acute impacts on the marine ecosystems in the near-field area of the discharge. Environmental impact of the desalination plant discharge is supposedly site- and volumetric- specific, and also depends on the salinity tolerance of the organisms inhabiting the water column in and around a discharge environment. Scientific studies that aim to understand possible impacts of elevated salinity levels are important to assess detrimental effects to organisms, especially for species with no mechanism of osmoregulation, e.g., presumably corals. Previous studies on corals indicate sensitivity toward hypo- and hyper-saline environments with small changes in salinity already affecting coral physiology. In order to evaluate sensitivity of Red Sea corals to increased salinity levels, we conducted a long-term (29 days) in situ salinity tolerance transect study at an offshore seawater reverse osmosis (SWRO) discharge on the coral Fungia granulosa. While we measured a pronounced increase in salinity and temperature at the direct outlet of the discharge structure, effects were indistinguishable from the surrounding environment at a distance of 5 m. Interestingly, corals were not affected by varying salinity levels as indicated by measurements of the photosynthetic efficiency. Similarly, cultured coral symbionts of the genus Symbiodinium displayed remarkable tolerance levels in regard to hypo- and hypersaline treatments. Our data suggest that increased salinity and temperature levels from discharge outlets wear off quickly in the surrounding environment. Furthermore, F. granulosa seem to tolerate levels of salinity that are distinctively higher than reported for other corals previously. It remains to be determined whether Red Sea corals in general display increased salinity tolerance, and whether this is related to prevailing levels of high(er) salinity in the Red Sea in comparison to other oceans.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Physical Sciences and Engineering (PSE) Division
Citation:
van der Merwe R, Röthig T, Voolstra CR, Ochsenkühn MA, Lattemann S and Amy GL (2014) High salinity tolerance of the Red Sea coral Fungia granulosa under desalination concentrate discharge conditions: an in situ photophysiology experiment. Front. Mar. Sci. 1:58. doi: 10.3389/fmars.2014.00058
Publisher:
Frontiers Media SA
Journal:
Frontiers in Marine Science
Issue Date:
10-Nov-2014
DOI:
10.3389/fmars.2014.00058
Type:
Article
ISSN:
2296-7745
Additional Links:
http://www.frontiersin.org/Marine_Pollution/10.3389/fmars.2014.00058/abstract
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Physical Sciences and Engineering (PSE) Division; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorVan Der Merwe, Riaanen
dc.contributor.authorRöthig, Tillen
dc.contributor.authorVoolstra, Christian R.en
dc.contributor.authorOchsenkuhn, Michael A.en
dc.contributor.authorLattemann, Sabineen
dc.contributor.authorAmy, Gary L.en
dc.date.accessioned2014-11-30T13:55:24Z-
dc.date.available2014-11-30T13:55:24Z-
dc.date.issued2014-11-10en
dc.identifier.citationvan der Merwe R, Röthig T, Voolstra CR, Ochsenkühn MA, Lattemann S and Amy GL (2014) High salinity tolerance of the Red Sea coral Fungia granulosa under desalination concentrate discharge conditions: an in situ photophysiology experiment. Front. Mar. Sci. 1:58. doi: 10.3389/fmars.2014.00058en
dc.identifier.issn2296-7745en
dc.identifier.doi10.3389/fmars.2014.00058en
dc.identifier.urihttp://hdl.handle.net/10754/336351en
dc.description.abstractSeawater reverse osmosis desalination concentrate may have chronic and/or acute impacts on the marine ecosystems in the near-field area of the discharge. Environmental impact of the desalination plant discharge is supposedly site- and volumetric- specific, and also depends on the salinity tolerance of the organisms inhabiting the water column in and around a discharge environment. Scientific studies that aim to understand possible impacts of elevated salinity levels are important to assess detrimental effects to organisms, especially for species with no mechanism of osmoregulation, e.g., presumably corals. Previous studies on corals indicate sensitivity toward hypo- and hyper-saline environments with small changes in salinity already affecting coral physiology. In order to evaluate sensitivity of Red Sea corals to increased salinity levels, we conducted a long-term (29 days) in situ salinity tolerance transect study at an offshore seawater reverse osmosis (SWRO) discharge on the coral Fungia granulosa. While we measured a pronounced increase in salinity and temperature at the direct outlet of the discharge structure, effects were indistinguishable from the surrounding environment at a distance of 5 m. Interestingly, corals were not affected by varying salinity levels as indicated by measurements of the photosynthetic efficiency. Similarly, cultured coral symbionts of the genus Symbiodinium displayed remarkable tolerance levels in regard to hypo- and hypersaline treatments. Our data suggest that increased salinity and temperature levels from discharge outlets wear off quickly in the surrounding environment. Furthermore, F. granulosa seem to tolerate levels of salinity that are distinctively higher than reported for other corals previously. It remains to be determined whether Red Sea corals in general display increased salinity tolerance, and whether this is related to prevailing levels of high(er) salinity in the Red Sea in comparison to other oceans.en
dc.language.isoenen
dc.publisherFrontiers Media SAen
dc.relation.urlhttp://www.frontiersin.org/Marine_Pollution/10.3389/fmars.2014.00058/abstracten
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.subjectdesalinationen
dc.subjectsalinity toleranceen
dc.subjectFungia granulosaen
dc.subjectSymbiodiniumen
dc.subjectcoral reefen
dc.subjectRed Seaen
dc.subjectmarine monitoringen
dc.subjectenvironmental impact assessmenten
dc.titleHigh salinity tolerance of the Red Sea coral Fungia granulosa under desalination concentrate discharge conditions: an in situ photophysiology experimenten
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalFrontiers in Marine Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorVan Der Merwe, Riaanen
kaust.authorRöthig, Tillen
kaust.authorVoolstra, Christian R.en
kaust.authorOchsenkuhn, Michael A.en
kaust.authorLattemann, Sabineen
kaust.authorAmy, Gary L.en
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