DOI: 10.1007/s10533-018-0426-1
Scopus记录号: 2-s2.0-85042376671
论文题名: Hydrologic and biogeochemical drivers of dissolved organic carbon and nitrate uptake in a headwater stream network
作者: Seybold E. ; McGlynn B.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 138, 期: 1 起始页码: 23
结束页码: 48
语种: 英语
英文关键词: Dissolved organic Carbon
; Nitrogen
; Nutrient uptake
; Residence time
; TASCC
; Watershed export
英文摘要: Headwater streams are foci for nutrient and energy loading from terrestrial landscapes, in situ nutrient transformations, and downstream transport. Despite the prominent role that headwater streams can have in regulating downstream water quality, the relative importance of processes that can influence nutrient uptake have not been fully compared in heterotrophic aquatic systems. To address this research need, we assessed the seasonality of dissolved organic carbon (DOC) and nitrate (NO3 −) uptake, compared the relative influence of hydrologic and biogeochemical drivers on observed seasonal trends in nutrient uptake, and estimated the influence of these biological transformations on watershed scale nutrient retention and export. We determined that seasonal reductions in DOC and NO3 − concentrations led to decreases in the potential for the biotic community to take up nutrients, and that seasonality of DOC and NO3 − uptake was consistent with the seasonal dynamics of ecosystem metabolism. We calculated that that during the post-snowmelt period (June to August), biotic retention of both dissolved organic carbon and nitrate exceeded export fluxes from this headwater catchment, highlighting the potential for biological processes to regulate downstream water quality. © 2018, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83176
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Nicholas School of the Environment, University Program in Ecology, Duke University, 9 Circuit Dr, Durham, NC, United States; Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, 9 Circuit Dr, Durham, NC, United States
Recommended Citation:
Seybold E.,McGlynn B.. Hydrologic and biogeochemical drivers of dissolved organic carbon and nitrate uptake in a headwater stream network[J]. Biogeochemistry,2018-01-01,138(1)