期刊
ORGANIC GEOCHEMISTRY
卷 68, 期 -, 页码 1-4出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.orggeochem.2013.12.009
关键词
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资金
- National Science Foundation through the FCE-LTER program [DBI-0620409]
- George Barley Endowment
- ARC
- BNZ
- NWT
- CWT
- LUQ LTER
- FCE-LTER
- Department of Chemistry Biochemistry
- university graduate school for a DEA Fellowship
- Direct For Biological Sciences
- Division Of Environmental Biology [1237517] Funding Source: National Science Foundation
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. (C) 2014 Elsevier Ltd. All rights reserved.
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