Submarine groundwater discharge impacts on coastal nutrient biogeochemistry

Nature Reviews Earth & Environment, Journal Year: 2021, Volume and Issue: 2(5), P. 307 - 323

Published: March 30, 2021

Language: Английский

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Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Frontiers in Environmental Science, Journal Year: 2019, Volume and Issue: 7

Published: Oct. 1, 2019

The number of studies concerning Submarine Groundwater Discharge (SGD) grew quickly as we entered the 21st century. Many hydrological and oceanographic processes that drive influence SGD were identified characterized during this period. These included tidal effects on SGD, water solute fluxes, biogeochemical transformations through subterranean estuary, material transport via from land to sea. Here compile summarize significant progress in assessment methodologies, considering both terrestrial marine driving forces, local well global evaluations groundwater discharge with an emphasis investigations published over past decade. Our treatment presents state-of-the-art geophysical, geochemical, bio-ecological, economic, cultural perspectives. We identify remaining research questions, make recommendations for future directions, discuss potential challenges, including impacts climate change improved estimates magnitude SGD.

Language: Английский

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Science, society, and the coastal groundwater squeeze

Water Resources Research, Journal Year: 2017, Volume and Issue: 53(4), P. 2610 - 2617

Published: April 1, 2017

Abstract Coastal zones encompass the complex interface between land and sea. Understanding how water solutes move within across this is essential for managing resources society. The increasingly dense human occupation of coastal disrupts natural groundwater flow patterns degrades freshwater by both overuse pollution. This pressure results in a “coastal squeeze,” where thin veneers potable are threatened contaminant sources at surface saline depth. Scientific advances field hydrogeology have enabled responsible management protection important ecosystems. To address problems future, we must continue to make scientific advances, hydrology needs be firmly embedded integrated zone management. will require interdisciplinary collaboration, open communication scientists public, strong partnerships with policymakers.

Language: Английский

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Land Use Impacts on Coral Reef Health: A Ridge-to-Reef Perspective

Frontiers in Marine Science, Journal Year: 2019, Volume and Issue: 6

Published: Sept. 18, 2019

Over 60% of the world's reefs experience damage from local activities such as overfishing, coastal development, and watershed pollution. Land-based sources pollution are a critical threat to coral reefs, understanding "ridge-to-reef" changes is critically needed improve management survival in Anthropocene. We review existing literature on spatial-ecological connections between land use health, specifically examining vegetative, agricultural, urban, other land-use types. In general, forested positively related metrics condition, while anthropogenic uses like urban development agriculture drive decline cover, diversity, colony size, structural complexity. However, land-cover impacts vary across time space, small portions landscape (e.g., discrete segments unpaved roads, grazed scalded hillsides) may have an outsized effect reef pollution, presenting opportunities for targeted conservation. Some species show resilience under change, impact recovery bleaching remains active area research. Finally, spatial bibliography reveals that most ridge-to-reef studies focus handful regional hotspots, surface water, watershed-scale dynamics; more research address groundwater connectivity compare multiple regions scales. Approaches ecology assess patterns of, synergies between, interlocking cover assist conservation managers designing resilient reefscapes.

Language: Английский

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Impacts of nitrogen pollution on corals in the context of global climate change and potential strategies to conserve coral reefs

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 774, P. 145017 - 145017

Published: Feb. 1, 2021

Language: Английский

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Review of drivers and threats to coastal groundwater quality in China

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 806, P. 150913 - 150913

Published: Oct. 13, 2021

Language: Английский

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Review of Endocrine Disrupting Compounds (EDCs) in China's water environments: Implications for environmental fate, transport and health risks

Water Research, Journal Year: 2023, Volume and Issue: 245, P. 120645 - 120645

Published: Sept. 18, 2023

Language: Английский

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The impacts of climate change on coastal groundwater

Nature Reviews Earth & Environment, Journal Year: 2024, Volume and Issue: 5(2), P. 100 - 119

Published: Jan. 11, 2024

Language: Английский

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Physical Controls on Biogeochemical Processes in Intertidal Zones of Beach Aquifers

Water Resources Research, Journal Year: 2017, Volume and Issue: 53(11), P. 9225 - 9244

Published: Oct. 24, 2017

Abstract Marine ecosystems are sensitive to inputs of chemicals from submarine groundwater discharge. Tidally influenced saltwater‐freshwater mixing zones in beach aquifers can host biogeochemical transformations that modify chemical loads prior A numerical variable‐density flow and reactive transport model was used evaluate the physical controls on reactivity for mixing‐dependent mixing‐independent reactions aquifers, represented as denitrification sulfate reduction, respectively. sensitivity analysis performed across typical values tidal amplitude, hydraulic conductivity, terrestrial freshwater flux, slope, dispersivity, DOC reactivity. For setup conditions tested, simulations demonstrate remove up 100% terrestrially derived nitrate, reduction transform 8% seawater‐derived driven between saltwater promotes along boundary intertidal circulation cell pore water 1 10 ppt. The zone occupies average 49% zone. Denitrification rates highest landward side decrease circulating paths. Reactivity increases with size solute supply, while is controlled primarily by supply. results provide insights into types beaches most efficient altering fluxes discharge could be built upon help engineer enhance findings have implications management protect coastal estimation ocean.

Language: Английский

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Synthesizing the Effects of Submarine Groundwater Discharge on Marine Biota

Hydrology, Journal Year: 2018, Volume and Issue: 5(4), P. 60 - 60

Published: Oct. 19, 2018

Submarine groundwater discharge (SGD) is a global and well-studied geological process by which of varying salinities enters coastal waters. SGD known to transport bioactive solutes, including but not limited nutrients (nitrogen, phosphorous, silica), gases (methane, carbon dioxide), trace metals (iron, nickel, zinc). In addition, physical changes the water column, such as in temperature mixing can be caused SGD. Therefore influences both autotrophic heterotrophic marine biota across all kingdoms life. This paper synthesizes current literature impacts on were measured observed field, modeling, or laboratory studies. The review grouped organismal complexity: bacteria phytoplankton, macrophytes (macroalgae plants), animals, ecosystem Directions for future research about life, increasing number assessment studies biological parameters flux studies, are also discussed.

Language: Английский

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