|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.41 [2012] >
IJMS Vol.41(3) [June 2012] >
| Title: | Variations in community structure of phytoplankton in relation to physicochemical properties of coastal waters, southeast coast of India |
| Authors: | Sahu, Gouri
Satpathy, K.K.
Mohanty, A.K.
Sarkar, S.K. |
| Keywords: | Phytoplankton
Ecology
Seasonal variation
Algal blooms Coastal waters
East coast of India
Bay of Bengal |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A comprehensive
study on phytoplankton dynamics in the coastal waters of Kalpakkam showed a
considerable increase (almost 3 fold) in phytoplankton species composition (185
species) as compared to the earlier findings (60 species). Despite such a
massive change in floristic composition, 4-10 times reduction in total cell
count was observed during the present study, which varied between 1.7 x 105
and 1.5 x 106 cells l-1. Another important feature
of this study was the observation of Trichodesmium
erythraeum bloom in the coastal
waters. Concomitant with the bloom, a drastic fall in the number of
phytoplankton species was noticed. The change in phytoplankton assemblages
(density and species composition) during different seasons was significant and
was found to be regulated by the change in water characteristics associated
with monsoon. Diatoms dominated the phytoplankton assemblage followed by
dinoflagellates. Asterionellopsis glacialis and Thalassionema nitzschioides were
found to be dominant species among diatoms and dinoflagellates respectivaly, Prorocentrum micans and Protoperidinium sp. were the dominant
forms. Salinity was found to be an important parameter influencing the species
composition, standing stock and succession of phytoplankton at this location.
Salinity apparently influenced the phytoplankton density positively. Nitrate
was found to be the limiting factor for phytoplankton growth during late summer
and pre-monsoon periods, whereas, the role of silicate and phosphate remained
insignificant in this regard. |
| Page(s): | 223-241 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.41(3) [June 2012]
|
|
