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  Methane turnover in exposed sediments of an Amazon floodplain lake.

Koschorreck, M. (2000). Methane turnover in exposed sediments of an Amazon floodplain lake. Biogeochemistry, 50(2), 195-206.

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Koschorreck_2000.pdf (Verlagsversion), 63KB
 
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 Urheber:
Koschorreck, Matthias1, Autor           
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1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976549              

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Schlagwörter: methane; Amazon; floodplain; sediments
 Zusammenfassung: In the Amazon floodplain large areas of unvegetated lake sediments are exposed to air during low water. I measured methane fluxes from exposed sediments of an Amazonian floodplain lake and assessed the regulating factors. Methane emission decreased from values between 10 and 40 μmol CH₄m⁻²h⁻¹ to zero when the sediments were exposed to air. Mean fluxes were about 3.7 μmol CH₄m⁻²h⁻¹. Fluxes were low compared to measurements taken from flooded habitats making exposed lake sediments a negligible source of atmospheric CH₄. This was mainly due to the lack of ebullition which governs methane flux in the flooded phase. Methane oxidation at the sediment surface consumed up to 75% of the methane entering the oxidised zone. Compared with CO₂ emission methane turnover was of minor importance for the carbon budget of the sediments.

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Sprache(n): eng - English
 Datum: 2000-08
 Publikationsstatus: Erschienen
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 Identifikatoren: eDoc: 118601
Anderer: 1859/S 37506
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Titel: Biogeochemistry
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 50 (2) Artikelnummer: - Start- / Endseite: 195 - 206 Identifikator: ISSN: 0168-2563