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Title: Seasonal concentrations of heavy metals and environmental parameters with reference to the Indian largest wedge clam, Donax scortum (Linnaeus, 1758)
Authors: Tenjing, S Y
Narasimhaiah, N
Ciabotti, C
Keywords: Dendrogram;Environmental parameters;Heavy metals;Padukere;Principal Component Analysis
Issue Date: Oct-2020
Publisher: NISCAIR-CSIR, India
Abstract: Karnataka coast is subjected to several factors of pollution due to several anthropogenic activities. Such activities vary between other development aspects and fishing harbour. Studies on water quality parameters in seawater and heavy metals in wedge clam, Donax scortum (Family: Donacidae) were carried out from Padukere beach. Significant variability in the water quality parameters and heavy metals was observed in Padukere. The concentration of Mn was lower during pre-monsoon followed by post monsoon and monsoon, whereas the concentration of Zn was found to be high during post monsoon season followed by monsoon and pre-monsoon. Zn concentration was the highest in D. scortum compared to earlier studies from other geographical regions. The dendrogram indicated that the pattern clustering showed that seasonal variations in environmental variables and metals were determined by seasonal effects, and the influx and nature of water from Udayawara river. The dendrogram of temporal clustering of monitoring periods at Padukere showed that variation in the environmental parameters and metals in D. scortum were only determined by seasonal effects with transition months. PCA was used to interpret relationships between variables. Perhaps the distribution of metal concentrations is by the nature and frequency of discharge.
Page(s): 1627-1635
ISSN: 2582-6727 (Online); 2582-6506 (Print)
Appears in Collections:IJMS Vol.49(10) [October 2020]

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