Drivers for primary producers’ dynamics: New insights on annual benthos pelagos monitoring in anthropised freshwater marshes (Charente-Maritime, France)

Moncelon, Raphaël; Metzger, Édouard; Pineau, Philippe; Emery, Claire; Bénéteau, Eric; Lignières, Charlotte de; Philippine, Olivier; Robin, François-Xavier; Dupuy, Corinne

doi:10.1016/j.watres.2022.118718

Cited by 6 publications

(2 citation statements)

References 128 publications

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“…This contradiction can be explained by oxidation of Fe d and Mn d due to the high concentration of NO 3 − within the sediment (Luther et al, 1997;Jamieson et al, 2018), which was measured during the low discharge campaign and confirmed by its significant consumption within the sediment (0.9 mmol m − ² day −1 ). Multiple studies in lakes, salt marshes, or other aquatic contexts already highlighted the coupling between NO 3 − and metal remobilization from the benthic compartment (Hansen et al, 2003;Burgin et al, 2011;Moncelon et al, 2021;Moncelon et al, 2022). The persistence of iron and manganese oxides despite hypoxic conditions prevents phosphorus to be released out from the sediment, generating an important phosphorus storage through adsorption onto iron oxides (P asc /Fe asc between 0.17 and 0.20; see Appendix 4), and reaching the highest values of previous observations on Loire intertidal mudflats (Thibault de Chanvalon et al, 2016).…”

Section: Influence Of Extreme Hydrological Conditions On Diagenetic P...mentioning

confidence: 99%

Impact of an exceptional winter flood on benthic oxygen and nutrient fluxes in a temperate macrotidal estuary: Potential consequences on summer deoxygenation

et al. 2023

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Despite 20 years of control on eutrophication, episodes of summer hypoxia still occur in the Loire estuary, impacting water quality and posing a key scientific and management challenge. This work aimed to quantify the contribution of the benthic compartment to hypoxia in the Loire estuary by direct measurement of water–sediment fluxes and an in-depth understanding of the seasonal variations of oxides and phosphorus stocks. During the summer’s low-discharge period, results show that the iron oxide-rich deposit is stable under hypoxic conditions, limiting the release of dissolved phosphorus into the overlying water column. The high nitrate content of the water column appears to be an important oxidizer of iron during hypoxic periods, limiting dissolved phosphorus leakage and aggravation of hypoxia. During the exceptional winter flood, significant sediment erosion associated with bubbling phenomena (attributed to methane efflux) created severe fractures in the sediment and stimulated water–sediment exchange. During the following months, these fractures were progressively filled, which decreased the intensity of benthic fluxes. However, due to the high residence time in the water during the summer period, a simple model demonstrated that benthic contributions were sufficient to directly (by direct oxygen consumption) or indirectly (by promoting ammonia oxidation) affect the oxygen stock in the water column during the low-discharge period. Our study demonstrates the importance of the benthic compartment in the occurrence of hypoxia and the obvious lack of knowledge to illustrate and model the biogeochemical functioning of the estuary.

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Section: Influence Of Extreme Hydrological Conditions On Diagenetic P...mentioning

confidence: 99%

Impact of an exceptional winter flood on benthic oxygen and nutrient fluxes in a temperate macrotidal estuary: Potential consequences on summer deoxygenation

et al. 2023

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“…Researchers examine the nature and impact of particulate organic matter (POM) in aquatic environments, identifying its diverse composition-including bacteria, phytoplankton, protozoa, metazoans, and organic debris-and the factors influencing its deposition and ecological function [38][39][40][41][42]. POM typically ranges in size from 0.5 µm to several millimeters, depending on the source and composition.…”

Section: Introductionmentioning

confidence: 99%

Toward a Brighter Future: Enhanced Sustainable Methods for Preventing Algal Blooms and Improving Water Quality

Hwang,

Cho,

Kim

et al. 2024

Hydrobiology

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This comprehensive review explores the escalating challenge of nutrient enrichment in aquatic ecosystems, spotlighting the dire ecological threats posed by harmful algal blooms (HABs) and excessive particulate organic matter (POM). Investigating recent advancements in water treatment technologies and management strategies, the study emphasizes the critical need for a multifaceted approach that incorporates physical, chemical, and biological methods to effectively address these issues. By conducting detailed comparative analyses across diverse aquatic environments, it highlights the complexities of mitigating HABs and underscores the importance of environment-specific strategies. The paper advocates for sustainable, innovative solutions and international cooperation to enhance global water quality and ecosystem health. It calls for ongoing advancement, regular monitoring, and comprehensive research to adapt to emerging challenges, thus ensuring the preservation of aquatic biodiversity and the protection of communities reliant on these vital resources. The necessity of integrating technological innovation, ecological understanding, and global cooperation to safeguard aquatic ecosystems for future generations is paramount.

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Sedimentary geochemistry in P-limited freshwater drained marshes (Charente-Maritime, France): Original drivers for phosphorus mobilization

Moncelon,

Dupuy,

Pineau

et al. 2024

Applied Geochemistry

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Drivers for primary producers’ dynamics: New insights on annual benthos pelagos monitoring in anthropised freshwater marshes (Charente-Maritime, France)

Cited by 6 publications

References 128 publications

Impact of an exceptional winter flood on benthic oxygen and nutrient fluxes in a temperate macrotidal estuary: Potential consequences on summer deoxygenation

Impact of an exceptional winter flood on benthic oxygen and nutrient fluxes in a temperate macrotidal estuary: Potential consequences on summer deoxygenation

Toward a Brighter Future: Enhanced Sustainable Methods for Preventing Algal Blooms and Improving Water Quality

Sedimentary geochemistry in P-limited freshwater drained marshes (Charente-Maritime, France): Original drivers for phosphorus mobilization

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