Heavy metals in coral reef sediments of Kavaratti Island, India: An integrated quality assessment using GIS and pollution indicators

Antony, Sibin; Unnikrishnan, K.; Aswin, S.; Dev, Vinu V.; Arun, Vijayan; Krishnan, K. Anoop

doi:10.1016/j.marpolbul.2022.113721

Cited by 19 publications

(8 citation statements)

References 60 publications

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“…The Kavaratti is a busy island with maximum human and developmental activities in the Lakshadweep, which have only intensified over the past two decades. Faecal and nutrient pollution and human-induced metal contamination have been reported from coral sediments and coastal and groundwater of the Kavaratti (Antony et al, 2022; Madhusoodanan Pillai & Ouseph, 2002; Sudhanandh et al, 2013). The present study detects the changes in the Kavaratti lagoon that have occurred between 1976 and 2004.…”

Section: Discussionmentioning

confidence: 99%

Environmental monitoring of the Kavaratti lagoon, Lakshadweep Islands, Arabian Sea using larger foraminiferal distribution

Panchang,

N.,

Padate

et al. 2023

Journal of the Palaeontological Society of India

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Coral reef environments are known for the proliferation of algal symbiont-bearing foraminifera, which are sensitive indicators of water-quality conditions that support reef development. Keeping this in mind, 18 sediment samples were collected in the Kavaratti lagoon of Lakshadweep in 2004. The foraminiferal distribution and abundance of the major genera Amphistegina, Calcarina, Amphisorus and miliolids were compared with those reported nearly three decades ago. The aim was to identify changes in the foraminiferal data within the lagoon over time, through time-gap-sampling, to be able to assess environmental stress if any. The total foraminiferal number (TFN) in the lagoon ranges between 45 and 983 specimens per gram of dry sediments. The average TFN in the northern part of the lagoon (506/g) is lower than that in the southern part of the lagoon (612/g). Amphistegina and Calcarina, both being algal-symbiont-bearing foraminifera, show the tendency to occupy shallower depths of the lagoon. Amphisorus prefer the northern part of the lagoon, due to the prevalence of comparatively stronger currents. Over the past three decades, TFN in the lagoon has on an average gone down from 65,667 in 1976 to 56,100 (present study) specimens per 100 g of sediments. The larger foraminiferal distribution in the Kavaratti lagoon has slightly but undisputedly undergone quantitative and distributional changes over the past three decades. The FORAM Index suggests conducive environment for coral growth in the lagoon. However, definite deterioration due to dredging in the northern lagoon is indicated by the assemblage. The study also records signatures of domestic discharge and predicts a larger impact on the corals since 2004 to 2024.

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Section: Discussionmentioning

confidence: 99%

Environmental monitoring of the Kavaratti lagoon, Lakshadweep Islands, Arabian Sea using larger foraminiferal distribution

Panchang,

N.,

Padate

et al. 2023

Journal of the Palaeontological Society of India

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“…Due to their shallow depth, direct connection to open seas, and inherent origins, TWs are highly vulnerable ecosystems prone to contamination by a diverse array of pollutants [24]. Human activities have notably contributed to introducing substantial volumes of toxic substances into these fragile environments [51].…”

Section: Pollutants In Transitional Watersmentioning

confidence: 99%

“…On the other hand, RS provides valuable real-time spatial information on natural resources, physical terrain parameters, and anthropogenic processes [21]. This information helps to assess the pressures and impacts, identify potential pollutant sources, and relate them to environmental parameters [22][23][24]. In any case, the most significant benefit of GIS-based techniques and remote sensing is the visualization of specific and contextualized environmental problems, which, coupled with the integration of in situ measurements and statistical methods, can result in a comprehensive assessment of the pollution condition in transitional waters [18,20].…”

Section: Introductionmentioning

confidence: 99%

Assessing Contamination in Transitional Waters Using Geospatial Technologies: A Review

Arroyo-Ortega,

Chavarin-Pineda,

Torres

2024

IJGI

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Transitional waters (TWs) are relevant ecological and economical ecosystems that include estuaries, deltas, bays, wetlands, marshes, coastal lakes, and coastal lagoons and play a central role in providing food, protecting coastal environments, and regulating nutrients. However, human activities such as industrialization, urbanization, tourism, and agriculture are threatening these ecosystems, which results in contamination and habitat degradation. Therefore, it is essential to evaluate contamination in TW to develop effective management and protection strategies. This study analyses the application of geospatial technologies (GTS) for monitoring and predicting contaminant distribution in TW. Cartography, interpolation, complex spatial methods, and remote sensing were applied to assess contamination profiles by heavy metals, and persistent organic compounds, and analyze contamination indices or some physicochemical water parameters. It is concluded that integrating environmental and demographic data with GTS would help to identify critical points of contamination and promote ecosystem resilience to ensure long-term health and human well-being. This review comprehensively analyzes the methods, indicators, and indices used to assess contamination in transitional waters in conjunction with GTS. It offers a valuable foundation for planning future research on pollution in these types of waters or other similar water bodies worldwide.

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“…Natural or anthropogenic origin of heavy metals in sediments depends on the metal and the geographical location (Udayakumar et al, 2014 ). Since sedimentation is accumulative in nature, studying the elemental composition, especially heavy metals, will make it possible to assess the ecological state of this hydromineral resource and draw conclusions about the safety of its use (Sibin et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Chemical composition and physicochemical properties of natural therapeutic mud of Kazakhstan salt lakes: a review

Akimzhanova,

Sabitova,

Mussabayeva

et al. 2024

Environ Geochem Health

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In recent years, interest in natural therapeutic mud has been growing all over the world. This natural product has a positive therapeutic effect on the skin and has fewer side effects on the human body. There are more than 40 thousand salt lakes in Kazakhstan. Most of them have natural mud sources, the potential of which has not yet been fully explored. The review presents an analysis of the available information on the physical and chemical properties of the main sources of natural mud from salt lakes in Kazakhstan and Kazakh sanatoriums that use natural mud in the treatment. All available publications, presenting the systematic studies, were used for data analysis. A comparative analysis of the mineralization of water, brine, and silt in one reservoir shows that the mineralization of water is not always the least. The available data indicate a point and partial nature of peloid studies, e.g., inorganic composition of natural muds from Western and Southern Kazakhstan is well described in the literature. In turn, there is a lack of these data from Northern and Eastern Kazakhstan. Studies of peloids in these regions seem to be a promising direction of the future research for both local and world scientists. What is more, there is also a big gap in the analysis of organic matter of muds from the Kazakh lakes. Comparing the state of the art, i.e., the studies from other parts of Asia and Europe, the identification of the organic part of muds is another desirable direction as a potential source of biologically active compounds of natural origin.

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Heavy metals in coral reef sediments of Kavaratti Island, India: An integrated quality assessment using GIS and pollution indicators

Cited by 19 publications

References 60 publications

Environmental monitoring of the Kavaratti lagoon, Lakshadweep Islands, Arabian Sea using larger foraminiferal distribution

Environmental monitoring of the Kavaratti lagoon, Lakshadweep Islands, Arabian Sea using larger foraminiferal distribution

Assessing Contamination in Transitional Waters Using Geospatial Technologies: A Review

Chemical composition and physicochemical properties of natural therapeutic mud of Kazakhstan salt lakes: a review

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