- Home
- Organization
- History
- Executive Council
- Associate Office-Bearers
- Editorial Board
- Minutes of General Body
- MBAI Chapters
- Constitution/ Bye Law
Journal of the Marine Biological Association of India
UV radiation and natural fluorescence linked primary F roduction in Antarctic waters.
Primary productivity chlorophyll values have been measured an underwater profiling radiometer for the first time in the waters around Indian Antarctic Station (70046´S &11044Ein the summer of 1994. The profiles include natural fluorescene (upwelled radiance at 683 nm), scalar irradiance (photosynthetically active radiation, PAR), computed primary production (pp), diffuse attenuation coefficient , UV B (308 and 320 nm) and UV a (340 and 380nm) radiation, and water temperature, measured as a function of depth from 21/01/94 to 6/03/94. The profiles covered measurements between 2-75 metre depth. Fifteen observations were made at an anchored stations in Antarctic waters (69053’ to 70002’S) Sub-surface chlorophyll ranged from 0.2 to 0.5 mg m-3. Range in colomn chlorophyll was 6.6 to 71 mg m-3. The average values sub surface chlorophyll a and pp was 0.3 mg m-3 and 6.3 mg CM-3 hr -1respectively. The mean value for column chlorophyll was 19.2 mg -2 and primary productivity 102.4mg CM-2hr-1. Interestingly, positive correlations were observed between primary productivity values were normalized for PAR, a more negative effects was noticed in the sub-surface and column waters and his negative effect was significant at 1% level (p<0.01) in column waters. This response in the photosynthetic parameters could be due to the varied effect of UV A and UV B on phytoplankton.
keywords
The Marine Biological Association of India
PB No. 1604, CMFRI Campus,
Cochin - 682018, Kerala State, India
Tel : +91 484 2394420, 2394867
Fax : +91 484 2394909
Email : mail@mbai.org.in
Web : http://mbai.org.in
The Marine Biological Association of India C/o Mandapam Regional Centre of CMFRI Marine Fisheries P. O, Mandapam Camp, Ramanathapuram District, Tamil Nadu- 623 520