Latitudinal environmental gradients and diel variability influence abundance and community structure of Chaetognatha in Red Sea coral reefs

Handle URI:
http://hdl.handle.net/10754/622424
Title:
Latitudinal environmental gradients and diel variability influence abundance and community structure of Chaetognatha in Red Sea coral reefs
Authors:
Al-aidaroos, Ali M.; Karati, Kusum K.; El-sherbiny, Mohsen M.; Devassy, Reny P.; Kürten, Benjamin ( 0000-0003-0328-7847 )
Abstract:
The Red Sea has been recognized as a unique region to study the effects of ecohydrographic gradients at a basin-wide scale. Its gradient of temperature and salinity relates to the Indian Ocean monsoon and associated wind-driven transport of fertile and plankton-rich water in winter from the Gulf of Aden into the Red Sea. Subsequent evaporation and thermohaline circulation increase the salinity and decrease water temperatures toward the North. Compared with other ocean systems, however, relatively little is known about the zooplankton biodiversity of the Red Sea and how this relates to Red Sea latitudinal gradients. Among the most abundant zooplankton taxa are Chaetognatha, which play an important role as secondary consumers in most marine food webs. Since Chaetognatha are sensitive to changes in temperature and salinity, we surmised latitudinal changes in their biodiversity, community structure and diel variability along the coast of Saudi Arabia. Samples were collected at nine coral reefs spanning approximately 1500km, from the Gulf of Aqaba in the northern Red Sea to the Farasan Archipelago in the southern Red Sea. Thirteen Chaetognatha species belonging to two families (Sagittidae and Krohnittidae) were identified. Latitudinal environmental changes and availability of prey (i.e. Copepoda, Crustacea) altered Chaetognatha density and distribution. The cosmopolitan epiplanktonic Flaccisagitta enflata (38.1%) dominated the Chaetognatha community, and its abundance gradually decreased from South to North. Notable were two mesopelagic species (Decipisagitta decipiens and Caecosagitta macrocephala) in the near-reef surface mixed layers at some sites. This was related to wind-induced upwelling of deep water into the coral reefs providing evidence of trophic oceanic subsidies. Most Sagittidae occurred in higher abundances at night, whereas Krohnittidae were more present during the day. Chaetognatha with developing (stage II) or mature ovaries (stage III) were more active at night, demonstrating stage-specific diel vertical migration as a potential predator avoidance strategy.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC)
Citation:
Al-aidaroos Ali M., Karati KK, El-sherbiny MM, Devassy RP, Kürten B (2016) Latitudinal environmental gradients and diel variability influence abundance and community structure of Chaetognatha in Red Sea coral reefs. Systematics and Biodiversity 15: 35–48. Available: http://dx.doi.org/10.1080/14772000.2016.1211200.
Publisher:
Informa UK Limited
Journal:
Systematics and Biodiversity
Issue Date:
15-Aug-2016
DOI:
10.1080/14772000.2016.1211200
Type:
Article
ISSN:
1477-2000; 1478-0933
Sponsors:
This collaboration of the Jeddah Transect Project between King Abdulaziz University and GEOMAR Helmholtz-Centre for Ocean Research was funded by the King Abdulaziz University (KAU) Jeddah, Kingdom of Saudi Arabia, under grant No. T-065/430-DRS. During the writing phase of the project BK has been supported by a postdoctoral fellowship from King Abdullah University of Science and Technology (KAUST, Thuwal, Kingdom of Saudi Arabia).
Additional Links:
http://www.tandfonline.com/doi/full/10.1080/14772000.2016.1211200
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAl-aidaroos, Ali M.en
dc.contributor.authorKarati, Kusum K.en
dc.contributor.authorEl-sherbiny, Mohsen M.en
dc.contributor.authorDevassy, Reny P.en
dc.contributor.authorKürten, Benjaminen
dc.date.accessioned2017-01-02T09:28:30Z-
dc.date.available2017-01-02T09:28:30Z-
dc.date.issued2016-08-15en
dc.identifier.citationAl-aidaroos Ali M., Karati KK, El-sherbiny MM, Devassy RP, Kürten B (2016) Latitudinal environmental gradients and diel variability influence abundance and community structure of Chaetognatha in Red Sea coral reefs. Systematics and Biodiversity 15: 35–48. Available: http://dx.doi.org/10.1080/14772000.2016.1211200.en
dc.identifier.issn1477-2000en
dc.identifier.issn1478-0933en
dc.identifier.doi10.1080/14772000.2016.1211200en
dc.identifier.urihttp://hdl.handle.net/10754/622424-
dc.description.abstractThe Red Sea has been recognized as a unique region to study the effects of ecohydrographic gradients at a basin-wide scale. Its gradient of temperature and salinity relates to the Indian Ocean monsoon and associated wind-driven transport of fertile and plankton-rich water in winter from the Gulf of Aden into the Red Sea. Subsequent evaporation and thermohaline circulation increase the salinity and decrease water temperatures toward the North. Compared with other ocean systems, however, relatively little is known about the zooplankton biodiversity of the Red Sea and how this relates to Red Sea latitudinal gradients. Among the most abundant zooplankton taxa are Chaetognatha, which play an important role as secondary consumers in most marine food webs. Since Chaetognatha are sensitive to changes in temperature and salinity, we surmised latitudinal changes in their biodiversity, community structure and diel variability along the coast of Saudi Arabia. Samples were collected at nine coral reefs spanning approximately 1500km, from the Gulf of Aqaba in the northern Red Sea to the Farasan Archipelago in the southern Red Sea. Thirteen Chaetognatha species belonging to two families (Sagittidae and Krohnittidae) were identified. Latitudinal environmental changes and availability of prey (i.e. Copepoda, Crustacea) altered Chaetognatha density and distribution. The cosmopolitan epiplanktonic Flaccisagitta enflata (38.1%) dominated the Chaetognatha community, and its abundance gradually decreased from South to North. Notable were two mesopelagic species (Decipisagitta decipiens and Caecosagitta macrocephala) in the near-reef surface mixed layers at some sites. This was related to wind-induced upwelling of deep water into the coral reefs providing evidence of trophic oceanic subsidies. Most Sagittidae occurred in higher abundances at night, whereas Krohnittidae were more present during the day. Chaetognatha with developing (stage II) or mature ovaries (stage III) were more active at night, demonstrating stage-specific diel vertical migration as a potential predator avoidance strategy.en
dc.description.sponsorshipThis collaboration of the Jeddah Transect Project between King Abdulaziz University and GEOMAR Helmholtz-Centre for Ocean Research was funded by the King Abdulaziz University (KAU) Jeddah, Kingdom of Saudi Arabia, under grant No. T-065/430-DRS. During the writing phase of the project BK has been supported by a postdoctoral fellowship from King Abdullah University of Science and Technology (KAUST, Thuwal, Kingdom of Saudi Arabia).en
dc.publisherInforma UK Limiteden
dc.relation.urlhttp://www.tandfonline.com/doi/full/10.1080/14772000.2016.1211200en
dc.subjectChaetognathaen
dc.subjectcoral reefsen
dc.subjectdiel vertical migration (DVM)en
dc.subjectlatitudinal gradientsen
dc.subjectpelagic-benthic couplingen
dc.subjectRed Seaen
dc.subjectupwellingen
dc.subjectzooplanktonen
dc.titleLatitudinal environmental gradients and diel variability influence abundance and community structure of Chaetognatha in Red Sea coral reefsen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalSystematics and Biodiversityen
dc.contributor.institutionKing Abdulaziz University, Department of Marine Biology, Faculty of Marine Sciences, P.O. Box 80207, Jeddah, 21589, Saudi Arabiaen
dc.contributor.institutionCSIR-National Institute of Oceanography, Regional Centre Kochi, Kochi, 682018, Indiaen
dc.contributor.institutionSuez Canal University, Department of Marine Science, Faculty of Science, Ismailia, 41522, Egypten
dc.contributor.institutionGEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Ecology, Kiel, 24105, Germanyen
kaust.authorKürten, Benjaminen
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