Heavy metal enrichment in the seagrasses of Lakshadweep group of islands—A multivariate statistical analysis

Thangaradjou, T.; Raja, S.; Subhashini, Pon.; Nobi, E. P.; Dilipan, E.

doi:10.1007/s10661-012-2583-3

Cited by 24 publications

(19 citation statements)

References 40 publications

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“…In the early 1990's, studies on trace element accumulation patterns in seagrasses of India started, when Jagtap, (1983) first reported about the trace element levels in the seagrass Halophila beccarii. Thereafter, in the last few decades considerable amount of data have been generated on trace elements in various seagrass species of India Nobi et al, 2010;Sachithanandam et al, 2020;Sudharsan et al, 2012a;Thangaradjou et al, 2013). However, these studies have focused on few locations of India; mostly in the Palk bay and Gulf of Mannar (GOM) region of Tamil Nadu and the islands of Lakshadweep and Andaman and Nicobar, even though seagrasses have a pan India distribution.…”

Section: Introductionmentioning

confidence: 99%

Seagrass Ecosystems of India as Bioindicators of Trace Elements

Mishra¹,

Sahoo²,

Samantaray³

et al. 2020

Preprint

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Seagrasses are considered as efficient bioindicators of coastal trace element contamination. This chapter provides an overview on the trace element accumulation, tolerance and biomonitoring capacity of the various seagrass species distributed along the coast of India. A total of 10 trace elements are reported in seagrasses, 11 in sediment and nine in the water column from India. From the 11 seagrass species studied, 60% of research have focused on Syringodium isoetifolium, Cymodocea serrulata, Cymodocea rotundata and Halophila ovalis. 78% of seagrass trace element research in India is from Palk bay and Gulf of Mannar (GOM), Tamil Nadu and 16% from Lakshadweep Islands. Out of the 10 trace elements, Cd, Cu, Pb and Zn are the most studied in seagrass, Fe, Mn, Ni and Pb in sediment and Cu, Fe, Mg, Ni and Zn in the water column. Accumulation capacity of various trace elements in seagrass were species-specific. S. isoetifolium have the highest concentration of Cd and Mg at Palk bay and Lakshadweep Islands respectively. The concentration of Cu was higher in C. serrulata at GOM. Halodule uninervis and Halophila decipens have the highest concentration of Co, and Cr, Ni, Pb and Zn from Lakshadweep Islands. The highest concentration of Fe and Mn were highest in Halophila beccarii and H. ovalis from the coast of Goa and Palk bay respectively. Threshold levels (>10 mg L-1) of Cd, Cu, Pb and Zn were observed for C. serrulata, H. ovalis, H. uninervis and T. hemprichii, that can affect the Photo System -II of these seagrasses and exert cellular stress leading to seagrass loss and die-off. High concentration of these elements can exert negative impacts on seagrass associated trophic assemblages and ecosystem functioning. Seagrasses of India can be utilized as bioindicators of coastal trace element contamination but the associated toxicity and human health risks needs further investigation.

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Section: Introductionmentioning

confidence: 99%

Seagrass Ecosystems of India as Bioindicators of Trace Elements

Mishra¹,

Sahoo²,

Samantaray³

et al. 2020

Preprint

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“…Thus they act as a bio-indicator for heavy metals to differentiate contaminated areas from non-contaminated areas of the sea. The study was done by Thangaradjou et al shows that the concentration of the four toxic heavy metals (Cd, Pb, Zn, and Cu) was found higher in all the seagrasses when compared with the background values of seagrasses from Flores Sea, Indonesia [21]. The contamination factor of these four heavy metals ranged as Cd (1.97-12.5), Cu (0.73-4.4), Pb (2.3-8.89), and Zn (1.27-2.787).…”

Section: Metal Chelatingmentioning

confidence: 97%

Phytochemistry and Ethnopharmacology of the Sea Grass Cymodoceacea Family– A Review

Namadevan

Vanitha

2017

Asian J Pharm Clin Res

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Cymodoceaceae is a family of flowering plants, sometimes known as the "manatee-grass family," the family Cymodoceaceae includes only marine species. The angiosperm phylogeny II system, of 2003 (unchanged from the APG system, of 1998), does recognize Cymodoceaceae and places it in the order Alismatales, in the clade monocots. They are marine hydrophytes that grow and complete their life cycle in a submerged condition, in a saline environment. Like terrestrial plant they obtain their energy from light through photosynthesis thus, they grow only in clear and shallow water, and at the suitable condition, they form beds or meadows. The family includes five genera, totalling 16 species of marine plants occurring in tropical seas and oceans (so-called seagrasses). Cymodoceaceae consist of five genera such as Amphibolis, Cymodocea, Halodule, Syringodium, and Thalassodendron. In this genera Cymodocea rotundata Ehrenb. and Hempr. Ex Asch. Cymodocea serrulata, (R.Br.) Asch. and Magnus, Halodule pinifolia (Miki) Hartog, Halodule uninervis (Forssk.) Asch and Syringodium isoetifolium (Asch.) are the species mostly adopted in Indian coastal region. These seagrass species have unique nature and wide application to the environment including human being. In this article botanical aspects, phytochemistry and ethnopharmacology of these five seagrass species belong to Cymodoceaceae family will be discussed.

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“…The use of Phragmites australis in the phytoremediation of hydrocarboncontaminated lagoon sediments showed no significant success (Pinchin et al, 2013). However, Ranieri et al (2013) and cluster analysis (Thangaradjou et al, 2013). Results Removal.…”

Section: Phytoremediationmentioning

confidence: 99%