Benthic metabolism and sulfur cycling along an inundation gradient in a tidal Spartina anglica salt marsh

TY - JOUR

T1 - Benthic metabolism and sulfur cycling along an inundation gradient in a tidal Spartina anglica salt marsh

AU - Gribsholt, B.

AU - Kristensen, E.

N1 - Reporting year: 2003 Metis note: 3633; CEME; ES; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2003/Gribsholt_ea_3633.pdf

PY - 2003

Y1 - 2003

N2 - Central aspects of carbon and sulfur biogeochemistry were studied along a transect extending from an unvegetated mudflat into a Spartina anglica salt marsh. Conditions along the transect differed with respect to tidal elevation, sediment characteristics, vegetation coverage, and benthic macrofauna abundance. Dark sediment O2 uptake and CO2 emission at the highly bioturbated mudflat were low and relatively unaffected by tidal coverage. Sulfate reduction accounted for 30–60% of the daily CO2 emission from the open mudflat sediment. Sediment O2 uptake within the nonbioturbated and vegetated marsh was up to seven times higher during air exposure than during inundation, whereas the difference in CO2 emissions always was less than a factor of 2. The contribution of sulfate reduction to CO2 production was low (

AB - Central aspects of carbon and sulfur biogeochemistry were studied along a transect extending from an unvegetated mudflat into a Spartina anglica salt marsh. Conditions along the transect differed with respect to tidal elevation, sediment characteristics, vegetation coverage, and benthic macrofauna abundance. Dark sediment O2 uptake and CO2 emission at the highly bioturbated mudflat were low and relatively unaffected by tidal coverage. Sulfate reduction accounted for 30–60% of the daily CO2 emission from the open mudflat sediment. Sediment O2 uptake within the nonbioturbated and vegetated marsh was up to seven times higher during air exposure than during inundation, whereas the difference in CO2 emissions always was less than a factor of 2. The contribution of sulfate reduction to CO2 production was low (

U2 - 10.4319/lo.2003.48.6.2151

DO - 10.4319/lo.2003.48.6.2151

M3 - Article

SN - 0024-3590

VL - 48

SP - 2151

EP - 2162

JO - Limnology and Oceanography

JF - Limnology and Oceanography

IS - 6

ER -