Impact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guinea

Simple item page
dc.contributor.authorWiafe, G.
dc.contributor.authorYaqub, H.B.
dc.contributor.authorMensah, M.A.
dc.contributor.authorFrid, C.L.J.
dc.date.accessioned2019-04-11T09:10:07Z
dc.date.available2019-04-11T09:10:07Z
dc.date.issued2008-03
dc.description.abstractWe investigated long-term changes in coastal zooplankton in the upwelling region in the Gulf of Guinea, 1969-1992, in relation to climatic and biotic factors. We considered the role of hydrographic and climatic factors, i.e. sea surface temperature (SST), salinity, sea level pressure, windfield, and Southern Oscillation Index (SOI), in the long-term variation of zooplankton in a multiple regression analysis, along with the abundance of Sardinella. Annual variation in zooplankton biomass was cyclical, with the annual peak occurring during the major upwelling season, July-September. Over the 24-year period, there was a downward trend in zooplankton biomass (equivalent to 6.33 ml per 1000 m3 per year). The decomposed trend in SST during the major upwelling revealed gradual warming of surface waters. This trend was believed to be the main influence on the abundance of the large copepod Calanoides carinatus (sensitive to temperatures above 23°C), which appears in the coastal waters only during the major upwelling season. The warming trend associated with global climate change could affect zooplankton community structure, especially during the major upwelling season. Global warming coupled with "top-down" (predation) control by Sardinella might be responsible for the long-term decline in zooplankton biomass in the upwelling region of the Gulf of Guinea. © 2008 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved.en_US
dc.identifier.otherDOI: 10.1093/icesjms/fsn042
dc.identifier.otherVol.65(3): pp 318-324
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/29162
dc.language.isoenen_US
dc.publisherICES Journal of Marine Scienceen_US
dc.subjectCalanoides carinatusen_US
dc.subjectClimate changeen_US
dc.subjectGlobal warmingen_US
dc.subjectGulf of Guineaen_US
dc.subjectSardinellaen_US
dc.subjectUpwellingen_US
dc.subjectZooplanktonen_US
dc.titleImpact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guineaen_US
dc.typeArticleen_US

Files

License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.6 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Department of Marine and Fisheries Sciences