Temperature dependence of the relationship between pCO2 and dissolved organic carbon in lakes

The relationship between the partial pressure of carbon dioxide (pCO2) and dissolved organic carbon (DOC) concentration in Brazilian lakes, encompassing 225 samples across a wide latitudinal range in the tropics, was tested. Unlike the positive relationship reported for lake waters, which was largel...

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Bibliographic Details
Published inBiogeosciences Vol. 13; no. 3; pp. 865 - 871
Main Authors Pinho, L, Duarte, C M, Marotta, H, Enrich-Prast, A
Format Journal Article
LanguageEnglish
Published Katlenburg-Lindau Copernicus GmbH 01.02.2016
Copernicus Publications
Subjects
Alkalinity
Carbon
Carbon cycle
Carbon dioxide
Coasts
Datasets
Dissolved organic carbon
Ecosystems
Lakes
Latitude
Metabolism
Mineralization
Organic carbon
Partial pressure
Precipitation
Temperature dependence
Tropical environments
Brazil
Atlantic Forest
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Summary:The relationship between the partial pressure of carbon dioxide (pCO2) and dissolved organic carbon (DOC) concentration in Brazilian lakes, encompassing 225 samples across a wide latitudinal range in the tropics, was tested. Unlike the positive relationship reported for lake waters, which was largely based on temperate lakes, we found no significant relationship for low-latitude lakes (< 33∘), despite very broad ranges in both pCO2 and DOC levels. These results suggest substantial differences in the carbon cycling of low-latitude lakes, which must be considered when upscaling limnetic carbon cycling to global scales.
ISSN:1726-4170
1726-4189
DOI:10.5194/bg-13-865-2016