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General Session 3: Biological oceanography & global change |
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Decadal variations of phytoplankton biomass using modis ocean colour data- bay of bengal waters, India
GS3-76-S
M.Naveen* , CAS in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu , India
R.Ranith, Fishery Environment and Management Division, CMFRI, Kochi, Kerala , India
L.Senthilnathan, Centre for Maritime Information Services, AMET University, Chennai Tamil Nadu, India
M.Machendiranathan, CAS in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu , India
A.Saravanakumar1, CAS in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu , India
T.Thangaradjou, CAS in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu , India
Presenter Email: muthunaveen009@gmail.com
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| Sea surface temperature (SST), photo-synthetically active radiation (PAR) plays amajor role in affecting the productivity of the ocean, which ultimately alter the fishery potential. Using MODIS ocean colour sensor/platform biophysical data collected from 2002 to 2016, we investigated trends of the concentrations of phytoplankton biomass in the BoB region and the probable responsible factors (SST and PAR). The retrieved data were processed in the ENVI 4.7 and ArcGIS 10.1 software. The results clearly showed that rising SST was the main factor maintaining the phytoplankton positive net growth. Notable manner during Postmonsoon increased chlorophyll-a concentration were observed near the northeastern part of the BoB revealed that its highly depend on the SST. However, increased trends of environmental variables in the BoBregion have noticed with reduction in phytoplankton growth, the result being a trend of declining chlorophyll-a from post monsoonto summer. The observed decadal trends of chlorophyll-a, SST and PAR were primarily influenced by both seasonal and inter annual climate variability in the Bay of Bengal region. Present study prompts further comprehensive studies to investigate the role of coastal and offshore waters in BoB chlorophyll-a trend with varying SST to find the probable ecological consequences. |
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