@article{fdi:010052883, title = {{M}ethane sources, sinks and fluxes in a temperate tidal {L}agoon : the {A}rcachon lagoon ({SW} {F}rance)}, author = {{D}eborde, {J}. and {A}nschutz, {P}. and {G}u{\'e}rin, {F}r{\'e}d{\'e}ric and {P}oirier, {D}. and {M}arty, {D}. and {B}oucher, {G}. and {T}houzeau, {G}. and {C}anton, {M}. and {A}bril, {G}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {A}rcachon lagoon is a 156 km(2) temperate mesotidal lagoon dominated by tidal flats (66% of the surface area). {T}he methane ({CH}4) sources, sinks and fluxes were estimated from water and pore water concentrations, from chamber flux measurements at the sediment air (low tide), sediment-water and water-air (high tide) interfaces, and from potential oxidation and production rate measurements in sediments. {CH}4 concentrations in waters were maximal (500-1000 nmol l(-1)) in river waters and in tidal creeks at low tide, and minimal in the lagoon at high tide (<50 nmol l(-1)). {T}he major {CH}4 sources are continental waters and the tidal pumping of sediment pore waters at low tide. {M}ethanogenesis occurred in the tidal flat sediments, in which pore water concentrations were relatively high (2.5-8.0 mu mol l(-1)) {N}evertheless, the sediment was a minor {CH}4 source for the water column and the atmosphere because of a high degree of anaerobic and aerobic {CH}4 oxidation in sediments. {A}tmospheric {CH}4 fluxes at high and low tide were low compared to freshwater wetlands. {T}emperate tidal lagoons appear to be very minor contributor of {CH}4 to global atmosphere and to open ocean.}, keywords = {methane ; chamber flux measurements ; coastal environment ; {A}rcachon {L}agoon}, booktitle = {}, journal = {{E}stuarine {C}oastal and {S}helf {S}cience}, volume = {89}, numero = {4}, pages = {256--266}, ISSN = {0272-7714}, year = {2010}, DOI = {10.1016/j.ecss.2010.07.013}, URL = {https://www.documentation.ird.fr/hor/fdi:010052883}, }