Saline intrusion in the Ganges-Brahmaputra-Meghna megadelta

Bricheno, Lucy; Wolf, Judith; Yu-juan, Sun

doi:10.1016/j.ecss.2021.107246

Cited by 31 publications

(26 citation statements)

References 60 publications

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“…Other impacts might be expected in response to factors that include changes in concentrations of oxygen, nutrients and pollutants due to altered dilution and chemical reaction kinetics (e.g., Abily et al, 2021;Sjerps et al, 2017;Whitehead et al, 2009), and modifications to land use including agricultural responses to warmer temperatures and changing rainfall patterns (Thorslund et al, 2021). Lowland, estuarine rivers and their associated aquatic ecosystems are also likely to be subject to changes in saline intrusion due to sea level rise (e.g., Bellafiore et al, 2021;Bricheno et al, 2021). In common with the changes in river regimes revealed using ERFA in this study, these additional multifaceted impacts will vary regionally (e.g., Liu et al, 2020) adding to the complexity of assessing the implications of climate change on the world's rivers.…”

Section: Discussionmentioning

confidence: 99%

Increasing Risk of Ecological Change to Major Rivers of the World With Global Warming

et al. 2021

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The hydrological characteristics of a river are key determinants of ecological processes and exert critical controls upon aquatic ecosystems. The links between hydrology and ecosystems are implicit within the natural flow paradigm (Lytle & Poff, 2004;Poff et al., 1997) which recognizes that a river's regime is central to sustaining aquatic biodiversity and ecosystem integrity. The river regime comprises components that characterize the variability, magnitude, frequency, duration, timing and rate of change of discharge. All aspects of a river's regime influence its aquatic ecosystems (Bunn & Arthington, 2002;Richter et al., 1996). The variability in discharge, for example, controls the structure of a river's fish communities directly by triggering life history processes such as migration and spawning, and indirectly by controlling habitat availability and diversity (Nestler et al., 2012;Southwood, 1977). The latter includes the expansion and contraction

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Section: Discussionmentioning

confidence: 99%

Increasing Risk of Ecological Change to Major Rivers of the World With Global Warming

et al. 2021

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“…Tide-driven salt-intrusion is another potential hazard at the coast, impacting availability of freshwater for agriculture and drinking. Salt intrusion is identified as a serious problem in many estuaries, including the Saint Lawrence estuary (Matte et al, 2014), the Pearl River (Payo-Payo et al, 2022), and Ganges-Brahmaputra-Meghna (GBM) delta (Bricheno et al, 2021). In these and other estuaries, the tides generate strong mixing bringing salt water up rivers with salt-intrusion reaching 100 s of km inland.…”

Section: Transport Of Properties and Materialsmentioning

confidence: 99%

Tides at a coast

Brown

Hibbert

Bricheno

et al. 2023

A Journey Through Tides

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“…The estuary is a region that is affected both by the sea tides and widely varying freshwater influx, which can result in a strong variation in salinity (Bricheno et al, 2021). In such an environment, maintaining homeostasis can be energetically very costly, and affect the amount of energy available for growth and reproduction (Schreck, 2010).…”

Section: Estuarine Fish Life History Characteristicsmentioning

confidence: 99%

“…Salinity and temperature (latitude) are two important environmental factors that will affect the variation of the life history characteristics of S. curriculus. In estuaries, freshwater meets seawater, so the salinity in estuary habitats is affected by a number of factors, most notably sea tides and freshwater influx, and therefore it can vary notably over relatively short time periods (Bricheno et al, 2021). Due to the demands of maintaining osmotic balance, this variation causes metabolic stress in fish (Nordlie, 2006).…”

Section: Introductionmentioning

confidence: 99%

Life History Traits, Elasticity Analyses, and Phenotypic Plasticity of Squaliobarbus curriculus in the Pearl River Estuary, China

Wang

Lin

Liu

et al. 2021

Front. Environ. Sci.

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Squaliobarbus curriculus, commonly known as red-eye fish, is widely distributed in East Asia. It is one of the important aquatic germplasm resource and economic species in the Pearl River. To give suggestions for better protection and management, we investigated its life history and conducted elasticity analyses. Samples (n = 451) were collected between 2016 and 2017 from the western Pearl River estuary. There were no significant differences between the length-weight relationships of females and males (W = 0.00001SL3.121). The von Bertalanffy growth function was Lt = 553.2 [1 − e−0.111(t+1.009)]. The estimated length at 50% sexual maturity for females was 209.6 and 200.0 mm for males, both at 3 years of age. Oocyte size-frequency distribution suggested batch spawning. Fecundity ranged between 9,407 and 175,086 eggs per fish (mean = 51,040, or 143.9 eggs/g of fish weight). To better understand the ecological phenotypic plasticity of S. curriculus we conducted meta-analyses on all available life history data for this species. Our results showed that the standard lengths at ages 2 and 3 in the estuary were significantly smaller than in the upper reaches of the Pearl River basin, and there were also obvious differences in fecundity and oocyte size. For more, the standard lengths at ages 2 and 3 were correlated negatively with latitude. Elasticity analysis showed that juveniles’ (aged 1–3) survival had the largest contribution to the population growth rate, which suggests that management efforts should focus on the early life stages.

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Saline intrusion in the Ganges-Brahmaputra-Meghna megadelta

Cited by 31 publications

References 60 publications

Increasing Risk of Ecological Change to Major Rivers of the World With Global Warming

Increasing Risk of Ecological Change to Major Rivers of the World With Global Warming

Tides at a coast

Life History Traits, Elasticity Analyses, and Phenotypic Plasticity of Squaliobarbus curriculus in the Pearl River Estuary, China

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