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

Pinho, L.; Duarte, Carlos M.; Marotta, H.; Enrich-Prast, A.

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

Files

bg-13-865-2016.pdf (618.97 KB)

Type

Article

Authors

Pinho, L.
Duarte, Carlos M.

Marotta, H.
Enrich-Prast, A.

KAUST Department

Biological and Environmental Sciences and Engineering (BESE) Division
Marine Science Program
Red Sea Research Center (RSRC)

Date

2016-02-15

Abstract

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.

Citation

Temperature dependence of the relationship between pCO2 and dissolved organic carbon in lakes 2016, 13 (3):865 Biogeosciences

Acknowledgements

This research is a contribution to projects from Brazilian research agencies (FAPERJ, CAPES and CNPq). L. Pinho was supported by PhD scholarships from CAPES (period in Brazil) and FAPERJ (period in Spain). A. Enrich-Prast received postdoctoral and other CAPES and CNPq fellowships during studies at Linkoping University. H. Marotta was supported by a research fellowship from FAPERJ (Programa Jovem Cientista do Nosso Estado), and a research grant from CNPq.