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Static chamber fluxes of carbon dioxide and methane from coastal wetlands on Upper Cape Cod, Massachusetts and supporting environmental data, 2021


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Sanders-DeMott, R., Eagle, M.J., Kroeger, K.D., Wang, F., Brooks, T.W., O'Keefe Suttles, J.A., Nick, S.K., Mann, A.G., and Tang, J. 2022, Carbon dioxide and methane fluxes with supporting environmental data from coastal wetlands across Cape Cod, Massachusetts (ver 2.0, June 2022): U.S. Geological Survey data release,


Saline tidal wetlands are important sites of carbon sequestration and produce negligible methane (CH4) emissions due to regular inundation with sulfate-rich seawater. Yet, widespread management of coastal hydrology has restricted vast areas of coastal wetlands to tidal exchange. These ecosystems often undergo impoundment and freshening, which in turn cause vegetation shifts like invasion by Phragmites, that affect ecosystem carbon balance. Understanding controls of carbon exchange in these understudied ecosystems is critical for informing climate consequences of blue carbon restoration and/or management interventions. Here we present measurements of net ecosystem exchange of carbon dioxide (CO2) and methane, along with ancillary meteorological [...]


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“Photo of a chamber sampling platform in a Phragmites wetland at Sage Lot Pond.”
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“CSV file containing data on soil and air temperature.”
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“CSV file containing data on methane and carbon dioxide fluxes.”
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“CSV file containing meteorological data.”
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Measurements of carbon dioxide and methane fluxes from static chambers were collected in 2021 to assess carbon exchange at coastal wetland sites across a range of impounded and natural, tidally unrestricted conditions in several villages within Falmouth, MA that vary in salinity, management status, and water level. Environmental metrics that could inform carbon exchange, including air and soil temperature, and photosynthetically active radiation were also collected to support data interpretation. This dataset can help evaluate the effect of hydrologic management on carbon dioxide and methane exchange in coastal wetlands. Data were collected to inform predictive models of carbon fluxes across coastal wetlands of varying management status and salinity and to facilitate National Park Service restoration planning and future blue carbon project assessments.

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