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Title: Analysis of physico-chemical characteristics of seawater in Andaman and Nicobar Islands using multivariate statistical analysis
Authors: Murugan, Rajaram
Ananthan, Gnanakkan
Sathishkumar, Rengasamy Subramaniyan
Balachandar, Kumar
Keywords: Andaman and Nicobar Islands;Multivariate analysis;Physico-chemical parameters;Principal Component Analysis
Issue Date: Feb-2020
Publisher: NISCAIR-CSIR, India
Abstract: The current study was aimed to determine the physico-chemical characteristics from the seawaters of Andaman and Nicobar Islands, during one year seasonal (post-monsoon, summer, pre-monsoon and monsoon) survey from January to December 2016 at six different sampling stations viz. Carbines Cove beach (CC), Burmenalla beach (BB), Hadoo Wharf harbor (HW), Pigeon Island (PI), Bquarry beach (BQB) and Campbell Bay (CB). Surface water temperature, pH, salinity, dissolved oxygen, nitrite (NO2), nitrate (NO3), total nitrogen (TN), inorganic phosphate (IP), total phosphate (TP) and silicate (SiO3) were recorded. The physico-chemical parameters were tested by means of multivariate statistical methods including Pearson’s correlation, Principal Component Analysis (PCA), Cluster Analysis (CA) and Multidimensional Scaling (MDS). PCA revealed that 60.38% of variations in physico-chemical characteristics of all the six sampling stations. It showed a high degree of positive correlation with surface water temperature, salinity, DO, nitrite, nitrate and inorganic phosphate. A moderate degree of positive correlation with total phosphate in all the four seasons. CA produced a dendrogram assemblage of the study sites into four groups that exhibited maximum similarity of 99.3 % which has anthropogenic influence. The acquired results are significant to the mentioned conditions for virtual study with other parallel ecosystem in the area.
Page(s): 271-280
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.49(02) [February 2020]

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