Seasonal variation in seagrass biomass in Northern Palk Bay, India

Govindasamy, C.; Arulpriya, M.

doi:10.1080/14888386.2011.653542

Cited by 20 publications

(14 citation statements)

References 10 publications

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“…However, these Fe values in the sediment of H. beccarii are more than three decades old and this high concentration of Fe in H. beccarii sediment compared to other seagrass ecosystem of India can be due to its presence within close proximity of mangrove sediments, which act as sink of trace elements (Apte et al, 2016;Mishra and Kumar, 2020). Though most of the trace element levels in the sediment of S. isoetifolium, T. hemprichii and C. serrulata meadows of Palk bay have similar levels in their sediment (Govindasamy et al, 2013;Libin Baby et al, 2017;Thangaradjou et al, 2013) the concentration of Cu and Zn are 20-fold lower in the sediment of T. hemprichii meadows (Jagtap and Untawale, 1984). On the west coast, the sediment of H. beccarii meadows were found with high levels of Cu at Vijayagiri and Ratnagiri, Maharashtra (Jagtap, 1983).…”

Section: Trace Metals In the Sediment Of Seagrass Meadowsmentioning

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: Trace Metals In the Sediment Of Seagrass Meadowsmentioning

confidence: 99%

Seagrass Ecosystems of India as Bioindicators of Trace Elements

Mishra¹,

Sahoo²,

Samantaray³

et al. 2020

Preprint

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show abstract

“…Inorganic phos phate and total organic nitrogen were considered as most important limiting factors for the growth and reproduction of seagrass (Govindasamy et al, 2012(Govindasamy et al, , 2013.…”

Section: Chapter 20 • Reactive Nitrogen In Coastal and Marine Waters 311mentioning

confidence: 99%

Reactive Nitrogen in Coastal and Marine Waters of India and Its Relationship With Marine Aquaculture

Prema

Singh

Jeyabaskaran

et al. 2017

The Indian Nitrogen Assessment

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“…The species diversity of seagrass in Palk Bay is reported to be highest in India (Parthasarathy et al, 1991) with the highest and lowest seagrass growth and ecosystem productivity reported during monsoon and post-monsoon (July-November; Govindasamy et al, 2013). The most dominant species occurring in this region are Cymodocea serrulata and Syringodium isoetifolium (Govindasamy and Arulpriya, 2011). In addition, beds of Halodule pinifolia, Enhalus sp., Thalassia sp., Cymodocea rotundata have also been sparsely distributed in various parts of the Bay (Purvaja et al, 2018).…”

Section: Study Areamentioning

confidence: 96%

“…The total seagrass cover surveyed during 2014 in Palk Bay waters was estimated to be ∼316 km 2 (Geevarghese et al, 2018). The species diversity of seagrass in Palk Bay is reported to be highest in India (Parthasarathy et al, 1991) with the highest and lowest seagrass growth and ecosystem productivity reported during monsoon and post-monsoon (July-November; Govindasamy et al, 2013). The most dominant species occurring in this region are Cymodocea serrulata and Syringodium isoetifolium (Govindasamy and Arulpriya, 2011).…”

Section: Study Areamentioning

confidence: 99%

In situ Photosynthetic Activities and Associated Biogeochemical Changes in Three Tropical Seagrass Species

et al. 2020

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Tropical seagrasses experience considerable spatio-temporal changes with light and other biogeochemical conditions and adopt species-specific acclimatization strategies. Variation in photo-acclimatory responses of three tropical seagrass species (Cymodocea serrulata, Thalassia hemprichii, and Enhalus acoroides) was studied by measuring photosynthetic electron transport rates (ETR) using Pulse Amplitude Modulated (PAM) fluorometry. Quantitative values of ETR and rates of photosynthetic O 2 evolution (net O 2 exchange corrected for dark respiration) were compared to establish speciesspecific relationships in shallow water conditions. The apparent average molar ratio of O 2 evolution to ETR for the studied species found lower than the theoretical value (0.25). The highest photosynthetic activity (ETR max) varied significantly among the three studied species in the decreasing order as: E. acoroides (59.27); T. hemprichii (54.06), and C. serrulata (46.72). The effective quantum yield (Y) of PS II (Photosystem II), one of the most useful indicators of stress conditions for seagrass, was observed to be significantly higher for E. acoroides compared to the other two species. It appears that the variations in water temperature and pCO 2 could significantly alter the photosynthetic characteristics of these shallow water seagrass species. This study is useful in predicting the photo-acclimation strategies to any change in light availability and subsequent biogeochemical changes at the sea bed by these tropical seagrass species.

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Seasonal variation in seagrass biomass in Northern Palk Bay, India

Cited by 20 publications

References 10 publications

Seagrass Ecosystems of India as Bioindicators of Trace Elements

Seagrass Ecosystems of India as Bioindicators of Trace Elements

Reactive Nitrogen in Coastal and Marine Waters of India and Its Relationship With Marine Aquaculture

In situ Photosynthetic Activities and Associated Biogeochemical Changes in Three Tropical Seagrass Species

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