Rising Water Salinity: A Threat to Mangroves of Indian Sundarbans

Zaman, Sufia; Bhattacharyya, Subhra Bikash; Pramanick, Prosenjit; Raha, Atanu Kumar; Chakraborty, Souneek; Mitra, Abhijit

doi:10.1108/s2040-7262(2013)0000013014

Cited by 27 publications

(12 citation statements)

References 11 publications

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“…; Zaman et al. ). This may explain why the Mornington Inlet catchment has a greater incidence of progressive landward movement of mangroves due to more persistent inundation during the wet season, when compared to the mouth of the Leichhardt River where the floodplain drains at a faster rate.…”

Section: Discussionmentioning

confidence: 97%

Mangrove response to environmental change in Australia's Gulf of Carpentaria

Asbridge

Lucas

Ticehurst

et al. 2016

Ecology and Evolution

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Across their range, mangroves are responding to coastal environmental change. However, separating the influence of human activities from natural events and processes (including that associated with climatic fluctuation) is often difficult. In the Gulf of Carpentaria, northern Australia (Leichhardt, Nicholson, Mornington Inlet, and Flinders River catchments), changes in mangroves are assumed to be the result of natural drivers as human impacts are minimal. By comparing classifications from time series of Landsat sensor data for the period 1987–2014, mangroves were observed to have extended seawards by up to 1.9 km (perpendicular to the coastline), with inland intrusion occurring along many of the rivers and rivulets in the tidal reaches. Seaward expansion was particularly evident near the mouth of the Leichhardt River, and was associated with peaks in river discharge with LiDAR data indicating distinct structural zones developing following each large rainfall and discharge event. However, along the Gulf coast, and particularly within the Mornington Inlet catchment, the expansion was more gradual and linked to inundation and regular sediment supply through freshwater input. Landward expansion along the Mornington Inlet catchment was attributed to the combined effects of sea level rise and prolonged periods of tidal and freshwater inundation on coastal lowlands. The study concluded that increased amounts of rainfall and associated flooding and sea level rise were responsible for recent seaward and landward extension of mangroves in this region.

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Section: Discussionmentioning

confidence: 97%

Mangrove response to environmental change in Australia's Gulf of Carpentaria

Asbridge

Lucas

Ticehurst

et al. 2016

Ecology and Evolution

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“…Mangroves are the most widespread tree communities of the Gangetic delta, and their physiology is considerably influenced by surface water salinity (Zaman et al 2014). Therefore, salinity alteration is clearly visualized in the mangrove community by way of differential growth of aboveground biomass (AGB) of sensitive species (Komiyama et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Climate change-induced salinity variation impacts on a stenoecious mangrove species in the Indian Sundarbans

Banerjee

Gatti

Mitra

2016

Ambio

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The alterations in the salinity profile are an indirect, but potentially sensitive, indicator for detecting changes in precipitation, evaporation, river run-off, glacier retreat, and ice melt. These changes have a high impact on the growth of coastal plant species, such as mangroves.Here, we present estimates of the variability of salinity and the biomass of a stenoecious mangrove species (Heritiera fomes, commonly referred to as Sundari) in the aquatic subsystem of the lower Gangetic delta based on a dataset from 2004 to 2015. We highlight the impact of salinity alteration on the change in aboveground biomass of this endangered species that, due to different salinity profile in the western and central sectors of the lower Gangetic plain, shows an increase only in the former sector, where the salinity is dropping and low growth in the latter, where the salinity is increasing.

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“…It is also observed, in the present study area, that species like Heritiera fomes is highly sensitive to salinity and prefers a low saline condition around 2-4 psu ( Figure 4). The gradual vanishing of this species from the Indian Sundarbans is a confirmatory test of the preference of some mangrove species to hyposaline environment (Zaman et al, 2013;Mitra and Zaman, 2014). Kakdwip, located in the western Indian Sundarbans, exhibits 'Moderate health' due to high degree of anthropogenic pressure arising from passenger vessel jetties, fish-landing activities, shrimp farms, brick kilns, busy market related activities etc.…”

Section: Discussionmentioning

confidence: 92%

Mangrove Health Card : A Case Study on Indian Sundarbans

Mitra¹,

Pramanick²,

Chakraborty³

2015

JJBS

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Relative abundance and Shannon-Weiner species diversity index of true mangrove species were estimated in 10 sampling stations of Indian Sundarbans during 2013. The mangrove patches in the selected stations were categorized into a 4-point scale depending on the values of Shannon-Weiner species diversity index. The health of the mangrove forest as per our constructed 4-point scale was found to be regulated primarily by anthropogenic factors, although in station like Sagar South, the natural erosion may be the key player in determining the mangrove floral diversity.

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Rising Water Salinity: A Threat to Mangroves of Indian Sundarbans

Cited by 27 publications

References 11 publications

Mangrove response to environmental change in Australia's Gulf of Carpentaria

Mangrove response to environmental change in Australia's Gulf of Carpentaria

Climate change-induced salinity variation impacts on a stenoecious mangrove species in the Indian Sundarbans

Mangrove Health Card : A Case Study on Indian Sundarbans

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