Distribution and diel vertical movements of mesopelagic scattering layers in the Red Sea

Handle URI:
http://hdl.handle.net/10754/325463
Title:
Distribution and diel vertical movements of mesopelagic scattering layers in the Red Sea
Authors:
Klevjer, Thor A.; Torres, Daniel J.; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
The mesopelagic zone of the Red Sea represents an extreme environment due to low food concentrations, high temperatures and low oxygen waters. Nevertheless, a 38 kHz echosounder identified at least four distinct scattering layers during the daytime, of which the 2 deepest layers resided entirely within the mesopelagic zone. Two of the acoustic layers were found above a mesopelagic oxygen minimum zone (OMZ), one layer overlapped with the OMZ, and one layer was found below the OMZ. Almost all organisms in the deep layers migrated to the near-surface waters during the night. Backscatter from a 300 kHz lowered Acoustic Doppler Current Profiler indicated a layer of zooplankton within the OMZ. They carried out DVM, yet a portion remained at mesopelagic depths during the night. Our acoustic measurements showed that the bulk of the acoustic backscatter was restricted to waters shallower than 800 m, suggesting that most of the biomass in the Red Sea resides above this depth. 2012 The Author(s).
Citation:
Klevjer TA, Torres DJ, Kaartvedt S (2012) Distribution and diel vertical movements of mesopelagic scattering layers in the Red Sea. Marine Biology 159: 1833-1841. doi:10.1007/s00227-012-1973-y.
Publisher:
Springer-Verlag
Journal:
Marine Biology
Issue Date:
13-Jun-2012
DOI:
10.1007/s00227-012-1973-y
PubMed ID:
24391275
PubMed Central ID:
PMC3873044
Type:
Article
ISSN:
00253162
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorKlevjer, Thor A.en
dc.contributor.authorTorres, Daniel J.en
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2014-08-27T09:52:29Z-
dc.date.available2014-08-27T09:52:29Z-
dc.date.issued2012-6-13en
dc.identifier.citationKlevjer TA, Torres DJ, Kaartvedt S (2012) Distribution and diel vertical movements of mesopelagic scattering layers in the Red Sea. Marine Biology 159: 1833-1841. doi:10.1007/s00227-012-1973-y.en
dc.identifier.issn00253162en
dc.identifier.pmid24391275en
dc.identifier.doi10.1007/s00227-012-1973-yen
dc.identifier.urihttp://hdl.handle.net/10754/325463en
dc.description.abstractThe mesopelagic zone of the Red Sea represents an extreme environment due to low food concentrations, high temperatures and low oxygen waters. Nevertheless, a 38 kHz echosounder identified at least four distinct scattering layers during the daytime, of which the 2 deepest layers resided entirely within the mesopelagic zone. Two of the acoustic layers were found above a mesopelagic oxygen minimum zone (OMZ), one layer overlapped with the OMZ, and one layer was found below the OMZ. Almost all organisms in the deep layers migrated to the near-surface waters during the night. Backscatter from a 300 kHz lowered Acoustic Doppler Current Profiler indicated a layer of zooplankton within the OMZ. They carried out DVM, yet a portion remained at mesopelagic depths during the night. Our acoustic measurements showed that the bulk of the acoustic backscatter was restricted to waters shallower than 800 m, suggesting that most of the biomass in the Red Sea resides above this depth. 2012 The Author(s).en
dc.language.isoenen
dc.publisherSpringer-Verlagen
dc.rights© The Author(s) 2012en
dc.rightsArchived with thanks to Marine Biologyen
dc.subjectAcoustic Doppler Current Profileren
dc.subjectbackscatteren
dc.subjectbiomassen
dc.subjectecho sounderen
dc.subjectenvironmental conditionsen
dc.subjectfood availabilityen
dc.subjecthigh temperatureen
dc.subjectmesopelagic zoneen
dc.subjectoxygen minimum layeren
dc.subjectpopulation distributionen
dc.subjectspatial distributionen
dc.subjectvertical movementen
dc.subjectwater massen
dc.subjectzooplanktonen
dc.subjectIndian Oceanen
dc.subjectRed Sea [Indian Ocean]en
dc.titleDistribution and diel vertical movements of mesopelagic scattering layers in the Red Seaen
dc.typeArticleen
dc.identifier.journalMarine Biologyen
dc.identifier.pmcidPMC3873044en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionWoods Hole Oceanographic Institution, MS #30, Woods Hole, MA 02543, United Statesen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorKlevjer, Thor Aleksanderen
kaust.authorKaartvedt, Steinen

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