Estuarine Chemistry

Bianchi, Thomas S.

doi:10.1002/9781118412787.ch3

Cited by 9 publications

(8 citation statements)

References 367 publications

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“…Noosa and Maroochydore, compositional changes were more strongly correlated with pH, with an increase in pH reflecting an increase in the influence of marine waters (Bianchi, 2012). In general, taxa which preferred low pH waters were found at a pH below 7.06, with most taxa persisting across a relatively broad pH range.…”

Section: Relationships Between Biological Composition and Environmentmentioning

confidence: 97%

Metabarcoding of benthic eukaryote communities predicts the ecological condition of estuaries

Chariton

Stephenson

Morgan

et al. 2015

Environmental Pollution

129

126

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Section: Relationships Between Biological Composition and Environmentmentioning

confidence: 97%

Metabarcoding of benthic eukaryote communities predicts the ecological condition of estuaries

Chariton

Stephenson

Morgan

et al. 2015

Environmental Pollution

129

126

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“…Estuarine processes play a pivotal role in structuring the seasonal and spatial patterns of biogeochemical cycles in the coastal zone where riverine and marine waters interact (Bianchi, 2013;Cloern et al, 2017). The mixing, processing, transportation, and thereby distribution of inorganic nutrients and riverine-and marine-origin organic matter vary along the salinity gradient in and out of estuaries, and differ among estuaries depending on river discharge, turbidity, water retention time, and seasonality (Bouillon et al, 2007;Lancelot and Muylaert, 2011).…”

Section: Introductionmentioning

confidence: 99%

Dominance of Autochthonous Phytoplankton-Derived Particulate Organic Matter in a Low-Turbidity Temperate Estuarine Embayment, Gwangyang Bay, Korea

et al. 2020

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In estuaries, the sources of organic matter, its composition, and its functional role in the coastal ecosystem food web are all influenced by dominant estuarine processes. We investigated seasonal variations in the quantity and composition of dissolved inorganic nutrients, suspended particulate matter (SPM), and phytoplankton across a low-turbidity estuarine-coastal continuum in Gwangyang Bay, South Korea. The narrow estuarine channel has a sharp salinity gradient (from 0 to around 30) and low SPM concentrations (<20 mg L −1). The channel carries river discharge, with a large quantity of nutrients (NO 3 and SiO 2), into the bay. The especially low SPM concentrations in the estuary (range: 2.0-29.1 mg L −1), and generous nutrient source, create an exceptionally low-turbidity condition in the water column and high primary productivity with no conspicuous spatial or seasonal trends. Gradually increasing δ 13 C values, low POC:Chla (<200), and low molar C:N (4-8) in the SPM, together with higher Chla concentrations at low SPM locations along the longitudinal transect, suggest that local production of phytoplankton has a strong influence on the distributional patterns of particulate organic matter. Short water-residence times, within the bay system, impede the accumulation of diverseorigin organic matter. The community composition of phytoplankton, distinguished by their size group, also plays a role in characterizing SPM quantity and composition. The results indicate that autochthonous pelagic production governs biogeochemical features in the low-turbidity estuarine embayment, contrasting with a prevalence of allochthonous organic matter, and its active processing, in highly turbid and/or longer residence-time systems.

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“…Dealing with large and dynamic reservoir water bodies, like the TGR, mixing of differing water masses is of peculiar importance. Similar to the striking role of estuarine biogeochemistry when rivers meet the sea, 19 the associated confluence zones of different freshwater masses form key interfaces for physical, chemical, and biological interactions. These are responsible for the fate and pathways of numerous pollutants and the distribution of water quality across the mixing zones.…”

Section: ■ Introductionmentioning

confidence: 99%

Three Gorges Reservoir: Density Pump Amplification of Pollutant Transport into Tributaries

Holbach

Norra

Wang

et al. 2014

Environ. Sci. Technol.

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The impoundment of the Three Gorges Reservoir (TGR) on the Yangtze River in China burdened its tributary backwaters with severe environmental problems. 1Confluence zones of reservoir tributaries with the Yangtze River main channel are main drivers of pollutant dynamics in the TGR 2 and are thus keys to develop mitigation measures. Here, we show a novel experimental approach of spatiotemporal water quality analysis to trace water mass movements and identify pollutant transport pathways in reservoir water bodies. Our results show the movements of density currents in a major tributary backwater of the TGR. A huge interflow density current from the Yangtze River main channel transported its heavy metal carriage to the upstream reaches of the tributary backwater. Water from the upstream backwater moved counterwise and carried less but pollutant-enriched suspended sediments. This scenario illustrates the importance of confluence zone hydrodynamics for fates and pathways of pollutants through the widely unknown hydrodynamics of new reservoirs.

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Estuarine Chemistry

Cited by 9 publications

References 367 publications

Metabarcoding of benthic eukaryote communities predicts the ecological condition of estuaries

Metabarcoding of benthic eukaryote communities predicts the ecological condition of estuaries

Dominance of Autochthonous Phytoplankton-Derived Particulate Organic Matter in a Low-Turbidity Temperate Estuarine Embayment, Gwangyang Bay, Korea

Three Gorges Reservoir: Density Pump Amplification of Pollutant Transport into Tributaries

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