Published by: NISCAIR (CSIR)
Subjects: Earth Science
This journal was started in 1972 and this multi-disciplinary journal publishes full papers and short communications in the following areas: marine biology, marine chemistry, marine geology, physical oceanography, ocean engineering, marine instrumentation, marine corrosion and material science, satellite oceanography & modeling, marine engineering, marine pollution, marine archaeology, coastal zone management.
Editor, IJGMS, National Institute of Science Communication And Information Resources, CSIR, K S Krishnan Marg, Pusa Campus,
New Delhi 110 012, India
Phone:25846301,03-07 (Extn-248); Fax:(91)(11) 25847062 E-mail: email@example.com
ISSN No. : 0379-5136
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Anthropogenic effects on sediment quality of Muthupet mangroves: assessing the sediment core geochemical record.
Title: Anthropogenic effects on sediment quality of Muthupet mangroves: assessing the sediment core geochemical record.
Authors: Natesan, Usha; Kumar, Madan M; Deepthi, K
Abstract: Four cores were collected from Muthupet mangroves,
southeast coast of India
to evaluate the heavy metal contamination (Ni, Pb, Mn, Zn, V, Sr and Sc) and
the associated geochemical parameters viz., texture, CaCO3 and organic
carbon. Textural analysis reveals a predominance of mud. A distinct event is
identified at 57.5-60 cm suggesting a change in deposition trend due to the
tsunami on 26th June 1941. The higher values in the lower portion in
all the core samples indicate that metals are reprecipitated at deeper levels.
According to Geoaccumalation index Muthupet mangroves can be considered to be
uncontaminated to moderately contaminated with respect to trace metals.
Sediment Enrichment Factor computation indicate that all metals except Ni and
Mn in C4 (crustal origin) are of anthropogenic origin. From estimation of toxic
unit, it is evident that the sequence for toxicity is C3 > C4 > C2 >
Sedimentary geochemistry of Chorao Island, Mandovi mangrove estuarine complex, Goa
Title: Sedimentary geochemistry of Chorao Island, Mandovi mangrove estuarine complex, Goa
Authors: Sappal, Swati M.; Ramanathan, AL.; Ranjan, Rajesh K.; Singh, Gurmeet
Abstract: Present study highlighted significant anthropogenic
contributions in terms of heavy metal pollution in Mandovi estuarine complex.
Sediment core was collected which was analyzed for different physico-chemical
parameters. Sediments were found to be mature, quartz rich and weathering does
not seem to play any role. Biological activities were significant due to
abundance of S and OC in the sediments which along with the redox conditions
controlled the metal variability. Sediments were found to be enriched with
respect to heavy metals like Pb and Mn indicating anthropogenic influence in
Reading source and processes with time from mangrove sedimentary environment of Vaitarna estuary, west coast of India
Title: Reading source and processes with time from mangrove sedimentary environment of Vaitarna estuary, west coast of India
Authors: Volvoikar, Samida P.; Nayak, G. N.
Abstract: Two mangrove sediment cores collected from Vaitarna
estuary were studied for the distribution of sediment
components (sand, silt, clay and organic carbon), major
elements (iron, manganese and aluminium) and trace metals (copper, zinc,
cobalt, nickel and lead). Both the cores showed a gradual decrease in sand and
an increase in clay component from bottom to surface. This change in the type
of sediment deposited was attributed to the change in hydrodynamic energy
conditions resulting from both natural (decrease in rainfall) as well as
anthropogenic activities (construction of dams, freshwater diversion, etc.).
Metals were found to be strongly associated with sand, silt and clay, while
Fe-Mn oxyhydroxides and organic matter were found to play a minor role. They
also showed similarity in their distribution patterns, thus suggesting a common
lithogenic source. Enrichment of iron and zinc in core S5 and manganese,
copper, cobalt and lead in core S6 towards surface however suggested increase
in anthropogenic additions in recent years.
Environmental significance of heavy metals in leaves and stems of Kerala mangroves, SW coast of India
Title: Environmental significance of heavy metals in leaves and stems of Kerala mangroves, SW coast of India
Authors: Badarudeen, A.; Sajan, K.; Srinivas, Reji; Maya, K.; Padmalal, D.
Abstract: Out of the seven heavy metals (Fe, Mn, Co, Pb, Cd, Cu
and Zn) studied in the leaves and stems of mangroves and
mangrove associates of Veli (9 species), Kochi (5 species) and
Kannur (9 species) regions, Cerbera odollam, a typical mangrove
associate that spread in Veli, accounts for the highest contents of Mn and Cd.
Other plant species do not show any specific heavy metal enrichment pattern in
the coastal segments chosen for the present study. A comparative evaluation of
heavy metal contents in the vegetal parts (leaves and stems) with that of the
sediment substratum reveals that, almost all metals are concentrated in the
former than latter.
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