Ecohydrology: A framework for overcoming the environmental impacts of shrimp aquaculture on the coastal zone of Bangladesh

Sohel, Md. Shawkat Islam; Ullah, Md. Hadayet

doi:10.1016/j.ocecoaman.2012.03.014

Cited by 54 publications

(30 citation statements)

References 60 publications

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“…The amount produced in Bagerhat was, however, significantly higher than in the Khulna farms. This could be the result of different salinities (Sohel and Ullah 2012) or other factors. This therefore became the major reason for dividing the group into farm in Khulna and farms in Bagerhat.…”

Section: Prawn In Bangladeshmentioning

confidence: 99%

Comparison of Asian Aquaculture Products by Use of Statistically Supported Life Cycle Assessment

Henriksson

Rico

Zhang

et al. 2015

Environ. Sci. Technol.

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We investigated aquaculture production of Asian tiger shrimp, whiteleg shrimp, giant river prawn, tilapia, and pangasius catfish in Bangladesh, China, Thailand, and Vietnam by using life cycle assessments (LCAs), with the purpose of evaluating the comparative eco-efficiency of producing different aquatic food products. Our starting hypothesis was that different production systems are associated with significantly different environmental impacts, as the production of these aquatic species differs in intensity and management practices. In order to test this hypothesis, we estimated each system's global warming, eutrophication, and freshwater ecotoxicity impacts. The contribution to these impacts and the overall dispersions relative to results were propagated by Monte Carlo simulations and dependent sampling. Paired testing showed significant (p < 0.05) differences between the median impacts of most production systems in the intraspecies comparisons, even after a Bonferroni correction. For the full distributions instead of only the median, only for Asian tiger shrimp did more than 95% of the propagated Monte Carlo results favor certain farming systems. The major environmental hot-spots driving the differences in environmental performance among systems were fishmeal from mixed fisheries for global warming, pond runoff and sediment discards for eutrophication, and agricultural pesticides, metals, benzalkonium chloride, and other chlorine-releasing compounds for freshwater ecotoxicity. The Asian aquaculture industry should therefore strive toward farming systems relying upon pelleted species-specific feeds, where the fishmeal inclusion is limited and sourced sustainably. Also, excessive nutrients should be recycled in integrated organic agriculture together with efficient aeration solutions powered by renewable energy sources.

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Section: Prawn In Bangladeshmentioning

confidence: 99%

Comparison of Asian Aquaculture Products by Use of Statistically Supported Life Cycle Assessment

Henriksson

Rico

Zhang

et al. 2015

Environ. Sci. Technol.

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“…The accumulation of nitrogen in the mangrove ecosystem occurred along with the sedimentation. Sediment transport various minerals such as nitrogen and phosphorus (Sohel & Ullah, 2012). Negative effect of height was considered as the result of nitrogen uptake by mangrove stands, while the positive effect of diameter was considered as the result of decomposition of organic matter or the increased sediment trapping.…”

Section: Resultsmentioning

confidence: 99%

Improving Silvofishery Management Through Seedling Growth – Environment Quality Dynamic Relation Analysis

Hastuti

2017

J Bio Bio Edu

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Mangrove plants are sensitive to environment condition. This research aimed to analyze the linkages of mangrove growth and environment dynamics and to estimate the growth of mangrove along with the environment dynamics. The research was conducted through the field experiment by the plantation of A. marina in silvofishery pond canals. Data collection was conducted for 18 months with 3 months observation interval. The environment variables observed including temperature, salinity, turbidity, pH, dissolved oxygen, TSS, sediment organic matter, nitrogen and phosphorus, and the growth of mangrove seedling. Analysis was conducted through regression and modelling with Powersim software. The result showed that the height growth was affected by dissolved oxygen, temperature, salinity, turbidity and pH, while the diameter growth was affected by TSS concentration. Inversely, the growth of mangrove also had a significant effect on temperature, change of organic matter and nutrient sediment concentration. Simulation showed that the height and diameter growth rates of A. marina seedling were dynamically changed among periods. Simulated seedling growth for one year forecast resulted in the rate of 0.115024 to 0.282294 cm/day for height and 0.001287 to 0.006031 cm/day for diameter. The simulation also indicated the continuous accumulation of organic matter and nitrogen over time. This research concluded that under limited environment dynamic, the growth of mangrove could be estimated. This model is a novelty in ecological studies. This research might initiates the more advanced ecological studies. Systematic estimation of ecosystem behaviour could be applied to formulate the best management practices, particularly in the silvofishery activities.

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“…The recent agricultural statistics show that 70% of shrimp farmers practice semi-intensive methods, which requires higher inputs of postlarvae shrimps (BBS 2014). The need for these higher inputs is usually met by collecting shrimp fry from estuaries of the Ganges-Brahmaputra river delta (Shrimp News International 2014), which damages natural fish stocks (Sohel and Ullah 2012). In addition, polluted shrimp pond waters released from the polders contaminate surrounding water bodies and further cause damages to the natural fish stocks (Deb 1998, Neiland et al 2001.…”

Section: Analysis Iii: Commercial Shrimp Farmingmentioning

confidence: 99%

Robust-yet-fragile nature of partly engineered social-ecological systems: a case study of coastal Bangladesh

Ishtiaque¹,

Sangwan²,

Yu³

2017

E&S

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ABSTRACT. Modern social-ecological systems are often partly engineered to enhance the robustness (or reduce the variance) of human welfare to environmental fluctuations over a foreseeable time horizon. Recent studies show, however, that subtle trade-offs are usually inherent in such efforts of enhancing short-term robustness. Managing variance on short time scales is likely to be associated with the buildup of hidden fragilities on longer time scales. Using a flood-prone social-ecological system (SES) of coastal Bangladesh as an example, this paper investigates some of the ways in which such robustness-fragility trade-offs can manifest. This SES has been extensively modified in the last few decades through the construction of large-scale flood protection structures (polders) and the introduction of commercial shrimp farming to enhance the robustness of food production to hydrological variability. Our case study analysis of the long-term changes in the SES shows that, although the modifications helped with stability in short time scales, the resulting changes also induced unforeseen problems such as infrastructure maintenance issues, land degradation and sinking, and exposure to market volatility. With this paper therefore we contribute to better understanding of the notion of robustness-fragility trade-offs by illustrating an exemplary case of the phenomenon in the engineered coastal environment context.

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Ecohydrology: A framework for overcoming the environmental impacts of shrimp aquaculture on the coastal zone of Bangladesh

Cited by 54 publications

References 60 publications

Comparison of Asian Aquaculture Products by Use of Statistically Supported Life Cycle Assessment

Comparison of Asian Aquaculture Products by Use of Statistically Supported Life Cycle Assessment

Improving Silvofishery Management Through Seedling Growth – Environment Quality Dynamic Relation Analysis

Robust-yet-fragile nature of partly engineered social-ecological systems: a case study of coastal Bangladesh

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