Influence of natural and anthropogenic factors on the water quality of the coastal waters around the South Andaman in the Bay of Bengal

VishnuRadhan, Renjith; Thresyamma, Divya David; Sarma, Kamal; George, Grinson; Shirodkar, P.V.; Vethamony, P.

doi:10.1007/s11069-015-1715-9

Cited by 11 publications

(12 citation statements)

References 24 publications

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Section: Discussion;supporting

confidence: 65%

“…Phosphate levels within the four-mangroves zone B (Fig.2) in our results were higher than Chidiyatappu (1.6-fold) 42 , Sippighat (3.1-fold) 49 and Aerial Bay (4.1-fold) 46 and were similar to Sundarbans mangroves sediment 61 . Higher phosphate levels within mangrove sediment are due to the land run-off from the nearby agricultural fields, as these mangrove areas are considered pristine in terms of anthropogenic pollution source 49 . Secondly, the higher organic matter input from the mangrove leaf litter and the microbial degradation, owing to rapid mobilization and recycling of nutrients during decomposition 14,15,16 also leads to higher phosphate levels.…”

Section: Discussion;supporting

confidence: 65%

“…Lower levels of phosphate at zone B than at zone A within the mangrove ecosystem suggests the outwelling of phosphate by daily tidal influx to the adjacent coastal ecosystem. Phosphate levels of Marine Jetty (Fig.2) in our study were 1.6-fold and 3.6-fold higher than Phoenix Jetty 49 and Aerial Bay 45,46 respectively and were similar to Rangat Bay 42,46 which can be related to the continuous input of anthropogenic waste water discharge at Marine Jetty as there are no source of agricultural input at this site.…”

Section: Discussion;supporting

confidence: 56%

“…Saying that, the waters of Andaman Sea are oligotrophic 49 , which requires the input of necessary materials from the adjacent coastal mangroves and seagrass ecosystems for better ecosystem functioning. This increases the importance of mangroves in production, cycling and transfer of nutrients to adjacent coastal ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Andaman mangrove sediments: source of nutrients and sink of heavy metals

Mishra

Manish

2018

Preprint

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Andaman Islands (AI) of India is a biodiversity hotspot of mangroves but biogeochemical dynamics of AI is less understood. We collected sediment samples of four AI mangrove sites and one site without mangroves for nutrients and trace metal analysis. Samples were collected from each site at the inlet of seawater (Zone A) and the other 500m into the mangrove creek (Zone B). Nutrients (sulphate, ammonium, nitrite and nitrate) levels, organic matter (OM) and carbon content were higher at Zone B of mangrove ecosystem due to the higher OM content from mangrove leaf litter decomposition and microbial degradation. Metal (Pb &Cd) content of zones with and without mangroves were similar and Igeo values indicated moderate contamination of mangrove zones of AI due to lack of anthropogenic pollution. Our results suggest mangrove ecosystems of AI are uncontaminated from heavy metals and are source of nutrients to the oligotrophic coastal ecosystems of Andaman Sea.

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Section: Discussion;supporting

confidence: 65%

Section: Discussion;supporting

confidence: 65%

Section: Discussion;supporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Andaman mangrove sediments: source of nutrients and sink of heavy metals

Mishra

Manish

2018

Preprint

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“…They may be a natural experimental area to examine the ecological changes and impacts that accompany human arrival [1]. The island's ecosystems have pristine environmental conditions, but the interference of humans poses serious threats to the delicate and vulnerable ecological processes of the island [2]. Anthropogenic loading of polluted materials from urbanized and industrialized land to the isolated islands cannot be directly performed, but it may be brought to these open waters by ocean currents and atmospheric deposits.…”

Section: Introductionmentioning

confidence: 99%

Identification of Seawater Quality by Multivariate Statistical Analysis in Xisha Islands, South China Sea

Wu¹,

Dong²,

Wang³

2017

Water Quality

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Xisha waters are considered to be in pristine condition, while facing the fast increasing stress under anthropogenic activities. Water quality around Yongxing Island (YX) has been measured in May, 2012. The results show that the water quality is of the first class standards as compared to the water quality of China, with insignificant difference among the monitoring stations. Robust principal component analysis (PCA) was used to identify the spatial pattern of water quality. YX is characterized by high DO, salinity, and Chl-a with low nutrients, indicating phytoplankton photosynthesis is stronger in YX island waters than the rest of the study areas. Beidao (BD) is characterized by high NH 4 -N and COD, and low pH, implying that these areas may have higher organic matter decomposition than rest of the areas. The water quality monitoring stations should cover spatially and temporally around Xisha waters for protecting the marine environment.

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Analysing the fragile islandscape of Ritchie's Archipelago: understanding land use changes, biodiversity loss, and tourism impacts on both the ecosystem and islanders

Mustafa,

Prasad

2024

GeoJournal

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Influence of natural and anthropogenic factors on the water quality of the coastal waters around the South Andaman in the Bay of Bengal

Cited by 11 publications

References 24 publications

Andaman mangrove sediments: source of nutrients and sink of heavy metals

Andaman mangrove sediments: source of nutrients and sink of heavy metals

Identification of Seawater Quality by Multivariate Statistical Analysis in Xisha Islands, South China Sea

Analysing the fragile islandscape of Ritchie's Archipelago: understanding land use changes, biodiversity loss, and tourism impacts on both the ecosystem and islanders

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