Title

Dissolved Black Nitrogen (DBN) in Freshwater Environments

Authors

Yan Ding, Southeast Environmental Research Center, Department of Chemistry & Biochemistry and Marine Sciences Program, Florida International UniversityFollow
Akira Watanabe, Graduate School of Bioagricultural Sciences, Nagoya UniversityFollow
Rudolf Jaffe´, Southeast Environmental Research Center, Department of Chemistry and Biochemistry, Florida International University,Follow

Abstract

Biomass burning results in the formation and accumulation of pyrogenic products such as black carbon (BC) and black nitrogen (BN) in soils. The ubiquitous presence of pyrogenic products in natural dissolved organic matter (DOM) and potential implications in global carbon cycling have recently been reported. However, little is known about the environmental dynamics or the importance in the global N cycle of dissolved BN (DBN; or heteroaromatic N). Here we report the coupling between DBN and dissolved BC (DBC) in ultrafiltered DOM from six headwater streams across a climatic region of North America, suggesting similar combustion sources, and that DOC may play an important role in the translocation of soil BN to the dissolved phase. The export of potentially recalcitrant riverine DBN to the ocean may affect the biogeochemical cycling of N and possibly the microbial community structure in aquatic environments.

Comments

The definitive publisher-authenticated version is available online at http://dx.doi.org/10.1016/j.orggeochem.2013.12.009

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Recommended Citation

Ding, Y., A. Watanabe, R. Jaffe. 2014. Dissolved black nitrogen (DBN) in freshwater environments. Organic Geochemistry 68: 1-4. DOI: 10.1016/j.orggeochem.2013.12.009