Hydrologic monitoring and analysis in the Sundarbans mangrove ecosystem, Bangladesh

Wahid, Shahriar; Babel, Mukand S.; Bhuiyan, Abdur Rahman

doi:10.1016/j.jhydrol.2006.07.016

Cited by 111 publications

(92 citation statements)

References 3 publications

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“…Bangladesh has a monsoonal climate with one dry and one wet season (Shaman et al 2005 Meteorological Department, Abhawa Bhaban, Agargaon, Dhaka). Substrate salinity ranges between 5 ‰ and 25 ‰ (Hoque et al 2006;Wahid et al 2007) around Khulna and is somewhat lower around Chittagong with an average of 7‰ (SRDI 1998). At the two study sites, the mangrove forest is flooded twice a day.…”

Section: Study Sites and Study Materialsmentioning

confidence: 99%

Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species

Chowdhury¹,

Schmitz²,

Verheyden³

et al. 2008

IAWA J

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SUMMARYNature and periodicity of growth rings were investigated in Sonneratia apetala and Heritiera fomes, two Bangladeshi mangrove species. From both species we collected three stem discs in the natural forest reserve of the Sundarbans. In addition, three discs were sampled from plantation-grown S. apetala trees of known age. Sanded stem discs revealed distinct growth rings but no periodic fluctuations in vessel variables (vessel density, vessel diameter, vessel grouping), which were measured at high resolution along a transect from pith to bark. The number of growth rings in plantation-grown S. apetala trees corresponded with the documented tree age, hence strongly suggesting the growth rings to be annual. Within species, the annual nature of the rings was further supported by a good match between the tree-ring series. The similar mean curves of S. apetala and H. fomes, growing at the same site in the Sundarbans, pointed to the presence of an external factor influencing their growth. A combination of precipitation and temperature was suggested influencing substrate salinity and phenological events. It became evident that tree-ring research in combination with the analysis of vessel patterns is a valuable tool to further investigate the complex interactions between tree growth and site ecology in mangrove forests.

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Section: Study Sites and Study Materialsmentioning

confidence: 99%

Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species

Chowdhury¹,

Schmitz²,

Verheyden³

et al. 2008

IAWA J

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“…The salinity model was calibrated separately for the dry (January-April) and wet (July-October) seasons to reflect seasonal variation of salinity in the rivers. 20 The geographic information system module uses detailed digital elevation models of the GBM spatial domain and outputs of river water levels at locations across the basin to compute depth and extent of flooding. Monthly salinity and flood area statistics were calculated for affected districts in Bangladesh and analyzed with cholera incidence data at surveillance locations.…”

Section: Methodsmentioning

confidence: 99%

Population Vulnerability to Biannual Cholera Outbreaks and Associated Macro-Scale Drivers in the Bengal Delta

Akanda¹,

Jutla

Gute

et al. 2013

The American Society of Tropical Medicine and Hygiene

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Abstract. The highly populated floodplains of the Bengal Delta have a long history of endemic and epidemic cholera outbreaks, both coastal and inland. Previous studies have not addressed the spatio-temporal dynamics of population vulnerability related to the influence of underlying large-scale processes. We analyzed spatial and temporal variability of cholera incidence across six surveillance sites in the Bengal Delta and their association with regional hydroclimatic and environmental drivers. More specifically, we use salinity and flood inundation modeling across the vulnerable districts of Bangladesh to test earlier proposed hypotheses on the role of these environmental variables. Our results show strong influence of seasonal and interannual variability in estuarine salinity on spring outbreaks and inland flooding on fall outbreaks. A large segment of the population in the Bengal Delta floodplains remain vulnerable to these biannual cholera transmission mechanisms that provide ecologic and environmental conditions for outbreaks over large geographic regions.

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“…The upstream low salinity zone contains the highest ecosystem carbon stock (336 ± 15 Mg C ha -1 ) followed by moderate and strong salinity zones. The regional differences of carbon stock the Sundarban has been related to salinity and dissolved nutrients (Wahid et al 2007) and with increasing salinity the mangrove plants become dwarfed. The observed salinity intrusion in the Sunderban swamps may have far reaching consequences to its biodiversity, with likely decline in species richness.…”

Section: Salinitymentioning

confidence: 99%

Sundarban mangroves: diversity, ecosystem services and climate change impacts

Neogi

Dey

Kabir

et al. 2017

Asian J. Med. Biol. Res

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Abstract:The Bengal delta coast harboring the famous Sundarban mangroves is extremely vulnerable to climate change. Already, salinity intrusion, increasing cyclones and anomalies in rainfall, and temperature, are causing many social and livelihood problems. However, our knowledge on the diversified climate change impacts on Sundarban ecosystems services, providing immense benefits, including foods, shelters, livelihood, and health amenities, is very limited. Therefore, this article has systematically reviewed the major functional aspects, and highlights on biodiversity, ecosystem dynamics, and services of the Sunderban mangroves, with respect to variations in climatic factors. The mangrove ecosystems are highly productive in terms of forest biomass, and nutrient contribution, especially through detritus-based food webs, to support rich biodiversity in the wetlands and adjacent estuaries. Sundarban mangroves also play vital role in atmospheric CO 2 sequestration, sediment trapping and nutrient recycling. Sea level rise will engulf a huge portion of the mangroves, while the associated salinity increase is posing immense threats to biodiversity and economic losses. Climate-mediated changes in riverine discharge, tides, temperature, rainfall and evaporation will determine the wetland nutrient variations, influencing the physiological and ecological processes, thus biodiversity and productivity of Sundarban mangroves. Hydrological changes in wetland ecosystems through increased salinity and cyclones will lower the food security, and also induce human vulnerabilities to waterborne diseases. Scientific investigations producing high resolution data to identify Sundarban"s multidimensional vulnerabilities to various climatic regimes are essential. Sustainable plans and actions are required integrating conservation and climate change adaptation strategies, including promotion of alternative livelihoods. Thus, interdisciplinary approaches are required to address the future climatic disasters, and better protection of invaluable ecosystem services of the Sunderban mangroves.

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Hydrologic monitoring and analysis in the Sundarbans mangrove ecosystem, Bangladesh

Cited by 111 publications

References 3 publications

Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species

Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species

Population Vulnerability to Biannual Cholera Outbreaks and Associated Macro-Scale Drivers in the Bengal Delta

Sundarban mangroves: diversity, ecosystem services and climate change impacts

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