Environmental Geochemistry Active
Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries, with the goal of providing data and guidance to federal, state, local, and private land owners and managers on these vital ecosystems.
Research Themes
Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries.
Below are other science projects associated with this project.
Environmental Geochemistry- Wetland Resilience
Data releases associated with the Environmental Geochemistry Project.
Environmental Geochemistry Project mulitmedia objects
Environmental Geochemistry Project publications
Nitrogen biogeochemistry of submarine groundwater discharge
Identifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae
Ra and Rn isotopes as natural tracers of submarine groundwater discharge in Tampa Bay, Florida
Submarine groundwater discharge to Tampa Bay: Nutrient fluxes and biogeochemistry of the coastal aquifer
Submarine ground-water discharge: nutrient loading and nitrogen transformations
Groundwater-transported dissolved organic nitrogen exports from coastal watersheds
Nitrogen loads to estuaries from waste water plumes: Modeling and isotopic approaches
Effects of watershed land use on nitrogen concentrations and δ15 nitrogen in groundwater
Submarine groundwater discharge to a small estuary estimated from radon and salinity measurements and a box model
Bacteriophage adsorption during transport through porous media: Chemical perturbations and reversibility
- Overview
Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries, with the goal of providing data and guidance to federal, state, local, and private land owners and managers on these vital ecosystems.
Research ThemesCoastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries.
- Science
Below are other science projects associated with this project.
Environmental Geochemistry- Wetland Resilience
Tidal wetlands are key ecosystems because they are unique ecological systems that provide essential habitat for fish, shellfish, birds and other fauna and flora, many of which have great economic importance. At the same time, tidal wetlands provide critical services to society by serving as a physical barrier between our cities, roads and homes and the rising sea. If healthy and properly managed... - Data
Data releases associated with the Environmental Geochemistry Project.
Filter Total Items: 18No Result Found - Multimedia
Environmental Geochemistry Project mulitmedia objects
- Publications
Environmental Geochemistry Project publications
Filter Total Items: 58Nitrogen biogeochemistry of submarine groundwater discharge
To investigate the role of the seepage zone in transport, chemical speciation, and attenuation of nitrogen loads carried by submarine groundwater discharge, we collected nearshore groundwater samples (n = 328) and examined the distribution and isotopic signature (δ15N) of nitrate and ammonium. In addition, we estimated nutrient fluxes from terrestrial and marine groundwater sources. We discuss ourAuthorsK.D. Kroeger, M.A. CharetteIdentifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae
Degradation of nearshore habitats is a serious problem in some areas of American Samoa, such as in Pago Pago Harbor on Tutuila Island, and is a smaller but chronic problem in other areas. Sedimentation, pollution, nutrient enrichment from surface runoff or groundwater, and trampling are the major factors causing the changes (Peshut and Brooks, 2005). On the outer islands of Ofu and Olosega (Manu’aAuthorsVirginia H. Garrison, Kevin D. Kroeger, Douglas Fenner, Peter CraigRa and Rn isotopes as natural tracers of submarine groundwater discharge in Tampa Bay, Florida
A suite of naturally occurring radionuclides in the U/Th decay series (222Rn, 223,224,226,228Ra) were studied during wet and dry conditions in Tampa Bay, Florida, to evaluate their utility as groundwater discharge tracers, both within the bay proper and within the Alafia River/estuary — a prominent free-flowing river that empties into the bay. In Tampa Bay, almost 30% of the combined riverine inpuAuthorsP.W. Swarzenski, C. Reich, K.D. Kroeger, M. BaskaranSubmarine groundwater discharge to Tampa Bay: Nutrient fluxes and biogeochemistry of the coastal aquifer
To separately quantify the roles of fresh and saline submarine groundwater discharge (SGD), relative to that of rivers, in transporting nutrients to Tampa Bay, Florida, we used three approaches (Darcy's Law calculations, a watershed water budget, and a 222Rn mass-balance) to estimate rate of SGD from the Pinellas peninsula. Groundwater samples were collected in 69 locations in the coastal aquiferAuthorsKevin D. Kroeger, Peter W. Swarzenski, Wm. Jason Greenwood, Christopher ReichSubmarine ground-water discharge: nutrient loading and nitrogen transformations
Eutrophication of coastal waters due to nonpoint source land-derived nitrogen (N) loads is a worldwide phenomenon and perhaps the greatest agent of change altering coastal ecology (National Research Council, 2000; Howarth and others, 2000). Within the United States, a majority of estuaries have been determined to be moderately to severely impaired by eutrophication associated with increasing nutriAuthorsKevin D. Kroeger, Peter W. Swarzenski, John Crusius, John F. Bratton, Matthew A. CharetteGroundwater-transported dissolved organic nitrogen exports from coastal watersheds
We analyzed groundwater-transported nitrogen (N) exports from 41 watershed segments that comprised 10 Cape Cod, Massachusetts watersheds to test the hypotheses that chemical form of N exports is related to land use and to length of flow paths through watersheds. In the absence of human habitation, these glacial outwash-plain watersheds exported largely dissolved organic N (DON) but at relatively lAuthorsK.D. Kroeger, Marci L. Cole, I. ValielaNitrogen loads to estuaries from waste water plumes: Modeling and isotopic approaches
We developed, and applied in two sites, novel methods to measure ground water-borne nitrogen loads to receiving estuaries from plumes resulting from land disposal of waste water treatment plant (WWTP) effluent. In addition, we quantified nitrogen losses from WWTP effluent during transport through watersheds. WWTP load to receiving water was estimated as the difference between total measured groundAuthorsK.D. Kroeger, Marci L. Cole, J.K. York, I. ValielaEffects of watershed land use on nitrogen concentrations and δ15 nitrogen in groundwater
Eutrophication is a major agent of change affecting freshwater, estuarine, and marine systems. It is largely driven by transportation of nitrogen from natural and anthropogenic sources. Research is needed to quantify this nitrogen delivery and to link the delivery to specific land-derived sources. In this study we measured nitrogen concentrations and δ 15N values in seepage water entering three frAuthorsMarci L. Cole, Kevin D. Kroeger, J.W. McClelland, I. ValielaSubmarine groundwater discharge to a small estuary estimated from radon and salinity measurements and a box model
Submarine groundwater discharge was quantified by a variety of methods for a 4-day period during the early summer of 2004, in Salt Pond, adjacent to Nauset Marsh, on Cape Cod, USA. Discharge estimates based on radon and salinity took advantage of the presence of the narrow channel connecting Salt Pond to Nauset Marsh, which allowed constructing whole-pond mass balances as water flowed in and out dAuthorsJohn Crusius, D. Koopmans, John F. Bratton, M.A. Charette, K.D. Kroeger, P. Henderson, L. Ryckman, K. Halloran, John A. ColmanBacteriophage adsorption during transport through porous media: Chemical perturbations and reversibility
No abstract available.AuthorsR.C. Bales, S.R. Hinkle, T.W. Kroeger, K. Stocking, C.P. Gerba - News