Nutrient dynamics in the Sundarbans mangrove estuarine system of Bangladesh under different weather and tidal cycles

Rahaman, S.M.B.; Sarder, Lipton; Rahaman, Sayadur; Ghosh, Arghya; Biswas, Sudhin Kumar; Siraj, SM Shahjahan; Huq, Khandaker Anisul; Hasanuzzaman, Abul Farah Md.; Islam, Shikder Saiful

doi:10.1186/2192-1709-2-29

Cited by 71 publications

(55 citation statements)

References 13 publications

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“…The high salinity values observed during summer compared to other seasons is might be due to low rain fall and the rise in atmospheric temperature resulting in high evaporation rate of the surface water. Similar seasonal variations were observed by Manokaran [35] in the inshore waters of Parangipettai and Cuddalore; by Murugesan et al [37] in Tuticorin coastal waters and Rahaman et al [38] in Sundarbans mangroves; Sivaraj et al [39] in Vellar-Coleroon estuarine system.…”

Section: Discussionsupporting

confidence: 84%

Diversity and Distribution of Polychaetes in Mangroves of East Coast of India

Perumal¹,

Sarathy²,

SamikkannuMuthuvelu³

et al. 2018

Mangrove Ecosystem Ecology and Function

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This research article reports an exhaustive account on the mangrove-associated polychaetes. Polychaetes are an important component in marine benthic communities and they play a major ecological role in mangrove ecosystem. This article gives an overview of polychaete diversity associated to five major mangrove forests of east coast of India (Muthupettai, Pichavaram, Coringa, Bhitarkanika and Sundarban). The results of this survey indicated that the physicochemical parameters did not vary much except a few parameters that showed only marginal variations. With regard to the macrobenthic organisms, the polychaetes topped the list. Crustaceans were found to be the next dominant group in the order of abundance and followed by gastropods and bivalves of the total benthic organisms collected. The results of the statistical analysis revealed that the parameters such as salinity, pH, silt, clay, total organic carbon (TOC), total nitrogen (TN) and total phosphate (TP) were manifested as best match in determining benthic fauna distributions followed by TOC, slit, clay and TP. The maximum number of polychaete species was recorded from Sundarban mangroves (68 species) and minimum in Muthupettai mangroves (39 species).

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Section: Discussionsupporting

confidence: 84%

Diversity and Distribution of Polychaetes in Mangroves of East Coast of India

Perumal¹,

Sarathy²,

SamikkannuMuthuvelu³

et al. 2018

Mangrove Ecosystem Ecology and Function

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“…In general, the nutrient distributions were high during the wet monsoon period compared to the dry pre-monsoon period. Many studies also recorded the same observation in their study area [17][18][19]. An observed increase in the nutrients measured during the wet monsoon period was associated with heavy rainfall that leads to peak river discharge and high terrestrial run-off.…”

Section: Results and Discussion Nutrients And Chl-a Distributionsupporting

confidence: 59%

Nutrient Distribution in the Besut River Basin, Terengganu, Malaysia (South China Sea)

2019

MJAS

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The aim of this study was to determine the distribution of nitrogen (N)-and phosphorus (P)-based nutrients in the Besut River basin, Malaysia (South China Sea). The mean concentrations of ammonia, nitrate, total dissolved N and total particulate N were 43 µg/L N, 195 µg/L N, 485 µg/L N, 431 µg/L N, respectively. In contrast to N, lower mean concentrations of P were recorded with values of 2.30 µg/L P (dissolved inorganic P), 4.84 µg/L P (total dissolved P) and 8.35 µg/L P (total particulate P). In general, higher concentrations of nutrients were recorded in the middle and lower reaches of the river basin due to human activities. Elevated levels of both forms of nutrients were present during the wet season due to terrestrial run-off to the water column. The molar ratio of dissolved inorganic N:P (nitrate + ammonia: inorganic P) was extremely high (72:1), much higher than the Redfield ratio (16:1), suggesting the nutrient-limiting factor for phytoplankton growth in this river basin was P. The results from this study can be used as a baseline comparison for future monitoring of this river basin. AbstrakTujuan kajian ini adalah untuk menentukan taburan nutrien berasaskan nitrogen (N) dan fosforus (P) di lembangan Sungai Besut, Malaysia (Laut China Selatan). Purata kepekatan ammonia, nitrat, jumlah N terlarut dan jumlah N partikulat masing-masing adalah 43 µg/L N, 195 µg/L N, 485 µg/L N, 431 µg/L N. Jika dibandingkan dengan N, purata kepekatan P yang direkodkan adalah rendah dengan nilai 2.30 µg/L P (tak organik P terlarut), 4.84 µg/L P (jumlah terlarut P) and 8.35 µg/L P (jumlah partikulat P). Umumnya, kepekatan nutrien adalah tinggi di kawasan pertengahan dan hilir lembangan sungai yang disebabkan oleh aktiviti manusia. Aras kepekatan adalah bertambah untuk kedua-dua jenis nutrien di musim basah hasil daripada larut lesap dari daratan ke kolum air. Nisbah molar takorganik terlarut N:P (nitrat + ammonia: tak organik P) adalah sangat tinggi (72:1) berbanding nisbah Redfield (16:1) yang mencadangkan faktor penghad nutrien untuk pertumbuhan fitoplankton di sungai ini adalah P. Hasil daripada kajian ini boleh digunakan sebagai perbandingan dasar pemantauan seterusnya untuk lembangan sungai ini.Kata kunci: air permukaan, nutrien, nisbah N:P, lembangan Sungai Besut

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“…This ecosystem stretches over approximately 10,000 km 2 spanning across India and Bangladesh and is characterized by the presence of perennial and rain‐fed rivers that open into the Bay of Bengal forming broad estuaries (WCMC, ). Nutrient‐rich coastal water flows in from the Bay of Bengal on a daily basis due to diurnal tidal action and mix with freshwater from these large rivers (Rahaman et al, ). High seasonal precipitation along with diurnal intrusion of tidal water rapidly changes the salinity profile of estuaries located in the Sundarbans (Choudhury & Bhadury, ; Rahaman et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Nutrient-rich coastal water flows in from the Bay of Bengal on a daily basis due to diurnal tidal action and mix with freshwater from these large rivers (Rahaman et al, 2013). High seasonal precipitation along with diurnal intrusion of tidal water rapidly changes the salinity profile of estuaries located in the Sundarbans Rahaman et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Exploring biogeographic patterns of bacterioplankton communities across global estuaries

Ghosh

Bhadury

2018

MicrobiologyOpen

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Estuaries provide an ideal niche to study structure and function of bacterioplankton communities owing to the presence of a multitude of environmental stressors. Bacterioplankton community structures from nine global estuaries were compared to understand their broad‐scale biogeographic patterns. Bacterioplankton community structure from four estuaries of Sundarbans, namely Mooriganga, Thakuran, Matla, and Harinbhanga, was elucidated using Illumina sequencing. Bacterioplankton communities from these estuaries were compared against available bacterioplankton sequence data from Columbia, Delaware, Jiulong, Pearl, and Hangzhou estuaries. All nine estuaries were dominated by Proteobacteria. Other abundant phyla included Bacteroidetes, Firmicutes, Acidobacteria, Actinobacteria, Cyanobacteria, Planctomycetes, and Verrucomicrobia. The abundant bacterial phyla showed a ubiquitous presence across the estuaries. At class level, the overwhelming abundance of Gammaproteobacteria in the estuaries of Sundarbans and Columbia estuary clearly stood out amidst high abundance of Alphaproteobacteria observed in the other estuaries. Abundant bacterial families including Rhodobacteriaceae, Shingomonadaceae, Acidobacteriaceae, Vibrionaceae, and Xanthomondaceae also showed ubiquitous presence in the studied estuaries. However, rare taxa including Chloroflexi, Tenericutes, Nitrospirae, and Deinococcus‐Thermus showed clear site‐specific distribution patterns. Such distribution patterns were also reinstated by nMDS ordination plots. Such clustering patterns could hint toward the potential role of environmental parameters and substrate specificity which could result in distinct bacterioplankton communities at specific sites. The ubiquitous presence of abundant bacterioplankton groups along with their strong correlation with surface water temperature and dissolved nutrient concentrations indicates the role of such environmental parameters in shaping bacterioplankton community structure in estuaries. Overall, studies on biogeographic patters of bacterioplankton communities can provide interesting insights into ecosystem functioning and health of global estuaries.

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Nutrient dynamics in the Sundarbans mangrove estuarine system of Bangladesh under different weather and tidal cycles

Cited by 71 publications

References 13 publications

Diversity and Distribution of Polychaetes in Mangroves of East Coast of India

Diversity and Distribution of Polychaetes in Mangroves of East Coast of India

Nutrient Distribution in the Besut River Basin, Terengganu, Malaysia (South China Sea)

Exploring biogeographic patterns of bacterioplankton communities across global estuaries

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