Variation of Phytoplankton in a Tropical Estuary (Vellar Estuary, Bay of Bengal, India)

✍ Scribed by Dr. K. Krishnamurthy; P. Mani; K. Krishnamurthy

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 425 KB
• Volume: 74
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19890740109

✦ Synopsis

The pligtoplitnkton species ronipositiori antl comniiinity striirtiire were st tidied :It tlvo sttitions in t,he Vellar cstiiary froin Jnnimry to December. 1983. . I tot:il o f 117 species of p1iytopl;tnkton belonging to vitrioiis groups, nttlnely diatoms (!lo), diiioflugellates (21). ('hlorophycrne ( 3 ) . C'y;~iophycea,e (2) mti siliroflagell~~tes (1) were ol)serveti (hiring t h r stndy. The specks diversity, ricliricss t i i d evenness vdues viwied from 0.7 to 4.2 uiiitsiindividual. O.!) to 5.7 and 0. 19 to 0.75 respectively. Doniinmce index vitliies varied hetivccn 32.(i antl 96.4 during the st"dy pcriotl.

1 . Intrwluction

The riatural platikt.on c\*otnmunities of t h e Vellar esi iittry, Psrsngiyettai (1 1" ?!I' N lat ; 79" 46' E: long.) have been the siitijcct of intensive investigations hy inany workers (KXISHNAMI:K?'I LY 1967, ~RISIINAMI:IL'i'LLY, SANTllANAM aild s II NIBAKARAJ 1974, SAKTIIANAM, KXISHNAMURTIIY an({ SIINJ)AR..IK.AJ 1075, .Ih 5 'I,',, neutralized forindin. The bottles were left iindist,tirhed for 2-3 (lays until cotw plete sedimentution was achieved and t'he plankton settled on the bottom were used t o count) tlit. phytoplankton popnlstion using the Utermbhl inverted plcnkton microsrope after sufficient n i l n 1her dilution. Spccics diversity. richness inid evenness values were calciiltited following PIELOI: (1075). The doininance index wiis cdcnlat,ed using t)hc formn1;t of ~~C N . t U G H T o K (1967). The tl;tt;t given liere are RwriLgc niont,lily values.