reference : Restoring tides to reduce methane emissions in impounded wetlands: A new and potent Blue Carbon climate change intervention

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reftype Journal Article
Abstract Coastal wetlands are sites of rapid carbon (C) sequestration and contain large soil C stocks. Thus, there is increasing interest in those ecosystems as sites for anthropogenic greenhouse gas emission offset projects (sometimes referred to as "Blue Carbon"), through preservation of existing C stocks or creation of new wetlands to increase future sequestration. Here we show that in the globally-widespread occurrence of diked, impounded, drained and tidally-restricted salt marshes, substantial methane (CH4) and CO2 emission reductions can be achieved through restoration of disconnected saline tidal flows. Modeled climatic forcing indicates that tidal restoration to reduce emissions has a much greater impact per unit area than wetland creation or conservation to enhance sequestration. Given that GHG emissions in tidally-restricted, degraded wetlands are caused by human activity, they are anthropogenic emissions, and reducing them will have an effect on climate that is equivalent to reduced emission of an equal quantity of fossil fuel GHG. Thus, as a landuse-based climate change intervention, reducing CH4 emissions is an entirely distinct concept from biological C sequestration projects to enhance C storage in forest or wetland biomass or soil, and will not suffer from the non-permanence risk that stored C will be returned to the atmosphere.
Accession Number 28931842
Author Kroeger, K. D.; Crooks, S.; Moseman-Valtierra, S.; Tang, J.
Author Address U.S. Geological Survey, Woods Hole Coastal & Marine Science Center, 384 Woods Hole Road, Woods Hole, MA, 02543, USA. kkroeger@usgs.gov. Silvestrum Climate Associates, LLC, 150 Seminary Drive, 1E, Mill Valley, CA, 94941, USA. University of Rhode Island, Department of Biological Sciences, 120 Flagg Road, Kingston, RI, 02881, USA. Marine Biological Laboratory, Ecosystems Center, 7 MBL Street, Woods Hole, MA, 02543, USA.
DOI 10.1038/s41598-017-12138-4
Date Sep 20
ISSN 2045-2322 (Electronic) 2045-2322 (Linking)
Issue 1
Journal Scientific Reports
Notes Kroeger, Kevin D Crooks, Stephen Moseman-Valtierra, Serena Tang, Jianwu eng England 2017/09/22 06:00 Sci Rep. 2017 Sep 20;7(1):11914. doi: 10.1038/s41598-017-12138-4.
PMCID PMC5607314
Pages 11914
Title Restoring tides to reduce methane emissions in impounded wetlands: A new and potent Blue Carbon climate change intervention
URL https://www.ncbi.nlm.nih.gov/pubmed/28931842
Volume 7
Year 2017
Bibliographic identifiers
_record_number 2853
_uuid 1180069b-d3b8-4544-b8af-fc37a8e7bc63