Search: id:"swepub:oai:gup.ub.gu.se/299641" >
Large CO2 release a...
Large CO2 release and tidal flushing in salt marsh crab burrows reduce the potential for blue carbon sequestration
-
Xiao, Kai (author)
-
Wilson, Alicia M. (author)
-
Li, Hailong (author)
-
show more...
-
- Santos, Isaac R. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
-
Tamborski, Joseph (author)
-
Smith, Erik (author)
-
Lang, Susan Q. (author)
-
Zheng, Chunmiao (author)
-
Luo, Xin (author)
-
Lu, Meiqing (author)
-
Correa, Rogger E. (author)
-
show less...
-
(creator_code:org_t)
- 2020-09-04
- 2021
- English.
-
In: Limnology and Oceanography. - : Wiley. - 1939-5590 .- 0024-3590. ; 66:1, s. 14-29
- Related links:
-
https://gup.ub.gu.se...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- © 2020 Association for the Sciences of Limnology and Oceanography Abundant crab burrows in carbon-rich, muddy salt marsh soils act as preferential water flow conduits, potentially enhancing carbon transport across the soil–water interface. With increasing recognition of blue carbon systems (salt marshes, mangroves, and seagrass) as hotspots of soil carbon sequestration, it is important to understand drivers of soil carbon cycling and fluxes. We conducted field observations and flow modeling to assess how crab burrows drive carbon exchange over time scales of minutes to weeks in an intertidal marsh in South Carolina. Results showed that continuous advective porewater exchange between the crab burrows and the surrounding soil matrix occurs because of tidally driven hydraulic gradients. The concentrations of dissolved inorganic (DIC) and organic (DOC) carbon in crab burrow porewater differ with that in the surrounding soil matrix, implying a diffusive C flux in the low-permeability marsh soil. Gas-phase concentrations of CO2 in ∼ 300 crab burrows were approximately six times greater than ambient air. The estimated total C export rate via porewater exchange (1.0 ± 0.7 g C m−2 d−1) was much greater than via passive diffusion transport (6.7 ± 2 mg C m−2 d−1) and gas-phase CO2 release (1.8 mg C m−2 d−1). The burrow-related carbon export was comparable to the regional salt marsh DIC export, groundwater-derived DIC export, and the net primary production previously estimated using ecosystem-scale approaches. These insights reveal how crab burrows modify blue carbon sequestration in salt marshes and contribute to coastal carbon budgets.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Xiao, Kai
-
Wilson, Alicia M ...
-
Li, Hailong
-
Santos, Isaac R.
-
Tamborski, Josep ...
-
Smith, Erik
-
show more...
-
Lang, Susan Q.
-
Zheng, Chunmiao
-
Luo, Xin
-
Lu, Meiqing
-
Correa, Rogger E ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Environmental Sc ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Oceanography Hyd ...
- Articles in the publication
-
Limnology and Oc ...
- By the university
-
University of Gothenburg