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Biodiversity in the occurrence of different species of phytoplankton along the Chennai coast

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Relation http://eprints.cmfri.org.in/16677/
http://www.envirobiotechjournals.com/article_abstract.php?aid=13416&iid=370&jid=3
http://doi.org/10.53550/EEC.2022.v28i08s.019
 
Title Biodiversity in the occurrence of different species of phytoplankton along the Chennai coast
 
Creator Hemasankari, P
Prema, D
Kaladharan, P
Kripa, V
Vinod, K
Narayanakumar, R
 
Subject Phytoplanktons
Marine Biodiversity
 
Description Phytoplankton is the major food of zooplankton and small pelagic occurring along the Chennai coast. The
distribution of phytoplankton vary from place to place and the occurrence of different species decides the
biodiversity of the ecosystem. This paper describes the occurrence and the characteristics of most common
phyto organisms along the Chennai coast using primer 6.0 software. The phytoplankton distribution consists
of dissolved volume, Ceratium species, Navicula, Bidulphia, Nitzschia, Gyrosigma and Chlorella during the
year’2011. The occurrence of the phytoplankton, Chaetoceros, 38.01%, followed by Thalasirrothrix is 11.95%,
Nitzschia is 8.94%, Navicula, 8.19%, Gyrosigma is 7.22%, Bidulphia is 6.57%, Coscinodiscus, 5.85%, Pleurosigma,
5.81%, Ceratium species, 4.58%, Chlorella is 2.74% and dissolved volume is 0.03% of the total phytoplankton
distribution. The primer graphs for eclidean distance of different months for different species of
phytoplankton were drawn. From the bray Curtis similarity graph it is evidenced that the distribution of
phytoplankton component. Chaetocerus is far from the other species since its occurrence is more during the
month of Jan’11. From the similarity graph, it is found that Chaetoceros and Coscinodiscus are closely related,
Ceratium species and Pleurosigma are closely related, Navicula and Bidulphia are closely related. The occurrence
of Chlorella is not closely related to any species. Bubble plots displays the individuals species abundances in
relation to the overall community pattern. Funnel graphs are drawn for the number of phytoplankton. As
the temperature increases during the summer month the phytoplankton decreases. The environmental
variables, temperature, pH, salinity, TSS, TDS, dissolved oxygen, chlorophyll a, b and c, primary productivity,
gross and net, nutrients, phosphate and ammonia vary significantly with the phytoplankton occurrence.
The correlation coefficient of occurrence of Ceratium-Nitzschia (0.78), Ceratium- Thalassirothrix-(0.98), Ceratium-
Pleurosigma (0.90), Navicula-Bidulphia (0.57), Navi cula-Nitzscia (0.10), Navicula -Gyrosigma (0.95), Navicula-
Chaetoceros (0.93), Navicula- Coscinodiscus (0.57), Navicula-Pleurosigma (0.19), Bidulphia-Nitzschia (0.50), Bidulphia
- Gyrosigma (0.31), Bidulphia- Chaetoceros (0.25), Bidulphia- Coscinodiscus (0.94), Nitzschia-Thalassirothrix (0.82),
Nitzschia-Coscinodiscus(0.34), Nitzschia-Pleuro -sigma (0.64), Gyrosigma-Chaetoceros (0.99), Gyrosigma-
Coscinodiscus (0.33), Gyro sigma-Pleurosigma (0.26), Chaetoceros-Coscinodiscus (0.26), Chaetoceros –Pleurosigma
(0.30), Gyrosigma-Chlorella (0.09), Chaetoceros-Chlorella (0.05). The species richness, d varies from 0-2.40,
Pielous’s index of evenness (J') varies from 0-0.97, Shannon–Wiener’s diversity index (H'), 0-2.32, simpson’s
dominance index, , 0-0.9. The species richness, species evenness, species diversity and dominance index
are all significant at p  0.05. The correlation between the environmental variables and the phytoplankton
species distribution were worked out.
 
Publisher EM International
 
Date 2022
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16677/1/Ecology%20Environment%20and%20Conservation_2022_P%20Kaladharan.pdf
Hemasankari, P and Prema, D and Kaladharan, P and Kripa, V and Vinod, K and Narayanakumar, R (2022) Biodiversity in the occurrence of different species of phytoplankton along the Chennai coast. Ecology, Environment and Conservation, 28. pp. 108-121. ISSN 0971–765X