Distribution and environmental implications of planktonic foraminifera in the surface sediments of southwestern part of Bay of Bengal, India

2021 ◽  
Author(s):  
N. Anbuselvan ◽  
D. Senthil Nathan
Keyword(s):  
Bay Of Bengal ◽  
Surface Sediments ◽  
Planktonic Foraminifera ◽  
Environmental Implications ◽  
Southwestern Part

scholarly journals Assessment of Heavy Metal Pollution Indices in Surface Sediments From Southwestern Bay of Bengal, India

2021 ◽  
Author(s):  
Harikrishnan Sadanandan ◽  
Senthil Nathan Dharmalingam ◽  
Nitin Agarwal ◽  
Sridharan Mouttoucomarassamy ◽  
Anbuselvan Nagarajan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Matter ◽  
Bay Of Bengal ◽  
Marine Pollution ◽  
Contamination Factor ◽  
Pollution Indices ◽  
Southwestern Part ◽  
Multivariate Statistical ◽  
Shelf Sediments

Abstract The study of heavy metal distribution in the shelf sediments of Southwestern part of Bay of Bengal is essential in determining the distribution pattern and to understand the consequences of marine pollution beside the coastal environment. The south eastern coastal areas of India are affected by several disturbances and contamination associated with accelerated industrialization and urbanization. Twenty-nine surface sediment samples were collected from shelf region of Southwestern part of Bay of Bengal and analyzed for sediment texture, organic matter and heavy metals. Pollution indices such as Enrichment Factor (EF), Geoaccumulation Index (Igeo), Contamination Factor (CF) as well as multivariate statistical analyses were used to recognize the pollution pattern and probable sources for metal contamination. Comparatively, the concentration of heavy metals in the study area is closely associated with finer fractions and organic matter. The results demonstrate that Cu, Co, Mn, Pb, Zn, Cr and Ni in most of the sites are extremely contaminated in terms of Igeo. The computed values of CF indicate very high contamination of the metals like Pb, Zn and Cr followed by uncontamination to moderate contamination of Cu, Mn, Ni, Co. Based on factor analysis, domestic and industrial activities from adjacent land areas are found to be the major contributors of heavy metals in the shelf sediments.

scholarly journals STUDY OF SOME ENVIRONMENTAL IMPLICATIONS DUE TO THE DISPOSAL OF ASHES FROM THE SÃO JERÔNIMO POWER STATION - RS

1997 ◽  
Vol 5 (5) ◽  
pp. 7-19
Author(s):  
Haidi D. Fiedler ◽  
Manuel Carneiro ◽  
Elba C. Teixeira
Keyword(s):  
Surface Waters ◽  
Surface Sediments ◽  
River Sediments ◽  
Cumulative Effect ◽  
Environmental Standards ◽  
Power Station ◽  
Short Term ◽  
Environmental Implications ◽  
Ph Values ◽  
Brazilian Legislation

The residues (ash agglomerates from combustion) generated at the São Jerônimo Power Station (UTSJ) were characterized with the main objective of evaluating, in pre-established conditions, the release of Cd, Co, Cu, Pb, Ni, Zn, Mn, Al, and Fe to the environment. Results revealed that, at different pH values, Fe, Zn, Mn, and Al were present in higher contents. In surface waters, for all sites analyzed, Fe and Al surpass the environmental standards imposed by Brazilian Legislation for class II surface waters. Surface sediments at the sites studied are basically composed by ashes from UTSJ, and a cumulative effect of deposition of the metals on the river sediments was verified. The experimental results are strongly indicative of an imperative need for a change in criteria in relation to the final disposal of residues from UTSJ. Otherwise, there is a high risk that the environmental impact in the short term will irreversibly damage the environment.

scholarly journals COMMUNITY STRUCTURE OF FORAMINIFERA IN SURFACE SEDIMENTS AND CORRELATION WITH ENVIRONMENTAL CONDITIONS IN OFFSHORE WATERS OF BALIKPAPAN, MAKASSAR STRAIT

2016 ◽  
Vol 7 (2) ◽  
Author(s):  
Suhartati M. Natsir ◽  
Aulya Firman ◽  
Indah Riyantini ◽  
Isni Nurruhwati
Keyword(s):  
Community Structure ◽  
Benthic Foraminifera ◽  
Surface Sediments ◽  
Planktonic Foraminifera ◽  
Sediment Type ◽  
Chemical Parameters ◽  
Sediment Samples ◽  
Sediment Types ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

The distribution of foraminifera is influenced by several environmental factors such as depth, sediment type, chemical and physical oceanographic paramaters, and season. The aim of the study was to determine the foraminiferal assemblages and their relationship to physical and chemical parameters in the offshore of Balikpapan waters of Makassar Strait such as depth, temperature, currents, sediment types, and salinity. Surface sediment, physical, and chemical parameters sampling was conducted in April 2012. The results of the observations on the sediment samples recognized planktonic foraminifera in 6 genera and 40 genera of benthic foraminifera from the 6 stations. Biodiversity of planktonic foraminifera was categorized in a low category with a range of 0.198-0.525. However, biodiversity for benthic foraminifera was categorized in a high category with a range of 0.811-0.925. Dominance of planktonic foraminifera was medium to high with range of 0.474-0.802 which was assumed due to the sampling sites as an open waters. Meanwhile, dominance for benthic foraminifera was in a low category with range of 0.075-0.189. The most common planktonic foraminifera was found from Genus Globigerina (10538 individuals). While, the most abundant of benthic foraminifera was found from Genus Amphistegina (3134 individuals).  Keywords: abundance, foraminifera, sediment, and Makassar Strait

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