Influence of Water quality on the biodiversity of phytoplankton in Dhamra River Estuary of Odisha Coast, Bay of Bengal

Abstract

Dhamra estuarine ecosystem is a hotspot of rich biological diversity which supports a patch of mangrove along with unique flora and fauna. In this study, the diversity of phytoplankton population and other factors that control their growth and biodiversity were investigated. The samples were collected monthly from Dhamra estuary of Bay of Bengal at 6 different stations (grouped under three regions) from March -2008 to February -2009. A total of 41 genera of phytoplankton species belonging to 4 classes of algae were identified. The maximum value of 9.3 X 10 4 cells l -1 was recorded in post monsoon season. Phytoplankton of Bacillariophyceae, appearing throughout the year, and represent majority of population (75-94%) at all the sampling stations, followed by Dinophyceae (3-14%), Cyanophyceae (3-8%) and Chlorophyceae (0-4%) classes. The Shannonweavers diversity index (H) remains between 0.22 and 2.49. Based on the correlation coefficient data, phytoplankton shows positive relationship with DO, salinity, nutrients and negative relationship with temperature and turbidity. Present study shows that the occurrence and diversity of these primary producers do not subscribe to a single dimensional phenomenon of a single factor, rather than, a consequence of a series of supported factors which will help to maintain and balance such type of fragile ecosystem. @JASEM

Spatiotemporal distribution and composition of phytoplankton assemblages in a coastal tropical lagoon: Chilika, India

“…These observations further highlight salinity as the predominant factor in controlling the distribution of both freshwater and marine forms of phytoplankton in the Chilika lagoon. Further, it was in agreement with other studies from the estuaries of Odisha coast including Chilika (Rath and Adhikary 2005;Palleyi et al 2011). Among the nutrients, silicate had profound influence on phytoplankton proliferation as evident from the strong negative correlation between Chl-a and silicate during monsoon (r=−0.335, p<0.05) and pre-monsoon (r=−0.331, p<0.05).…”

The use by local communities of plants from Sesaot Protected Forest, West Nusa Tenggara, Indonesia

“…Phytoplankton communities are multispecies communities, which are highly multifaceted in terms of their diversity and dynamics. Succession shifts in phytoplankton community structure are mainly due to changes in environmental variables such as nutrients and other physicochemical variables which influence the distribution and abundance of plankton communities in estuaries (Ferreira et al 2005;Madhu et al 2007;Palleyi et al 2011). Spatial distribution of diatoms in the estuary depends on the dispersion and mixing processes initiated by sea water and freshwater together.…”

“…Salinity influences the distribution and diversity of many living marine species. The rate of cell division on this microflora, as well as their occurrence, distribution and productivity is influenced by salinity (Lionard et al 2005;Putland et al 2007;Palleyi et al 2011;Sahu et al 2012;Farhadian et al 2015). There are many other factors, other than salinity that can influence the distribution of phytoplankton, such as turbidity, freshwater influx volume, water column stratification and grazing rate of zooplankton (Burns and Beardall 1987).…”

Struktur Komunitas Fitoplankton pada Berbagai Kedalaman di Pantai Timur Pananjung Pangandaran

“…Coscinodiscus sp. merupakan kelompok diatom yang juga mendominasi perairan pantai The Gulf of Gdańsk yang merupakan pantai Laut Baltic bagian selatan (Ameryk et al, 2014) dan muara Dhamra dari Teluk Benggala (Palleyi et al, 2011). Penelitian Ameryk et al (2014) menunjukkan bahwa dominansi fitoplankton jenis ini di perairan pantai The Gulf of Gdańsk dapat mempengaruhi komunitas bakteri.…”