DOI: 10.1007/s10533-013-9890-9
Scopus记录号: 2-s2.0-84897448807
论文题名: On the importance of quantifying bioavailable nitrogen instead of total nitrogen
作者: Jørgensen L. ; Markager S. ; Maar M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 2018-02-03 起始页码: 455
结束页码: 472
语种: 英语
英文关键词: Bioavailability
; Dissolved organic nitrogen
; Eutrophication
; Nitrogen
; Nitrogen budget
Scopus关键词: bioavailability
; dissolved organic nitrogen
; ecological modeling
; environmental monitoring
; eutrophication
; fractionation
; primary production
; Atlantic Ocean
; Baltic Sea
; Kattegat
; North Sea
; Skagerrak
英文摘要: Monitored and modeled data provided the basis for the establishment of two nitrogen (N) budgets covering the Kattegat-Belt Sea area in the period 2000-2009: one for total nitrogen (TN) and one for bioavailable nitrogen (Nbio). Our results show a significant difference between the two budgets, and we argue that Nbio is more important than TN for our understanding of the sources causing marine eutrophication. Consequently, an optimal strategy for abatement of eutrophication aims at minimizing Nbio rather than TN. The TN budget shows that advection from the adjacent seas is the dominant source of N to the Kattegat-Belt Sea area. The loadings from land and atmosphere only account for 14 and 9 % of the TN loadings, respectively. However, when the bioavailability of the different N sources is taken into account, the supply from land and atmosphere becomes relatively more important, now accounting for 21 and 16 %, respectively (37 % in total). The ecological relevance of land and atmosphere loadings is most likely even larger since a fraction of the input from the Skagerrak is exported again before it can support primary production. Water action plans have reduced the direct loadings of TN from land and atmosphere by about 35 % since the 1980s. The contributions from land and atmosphere accounted for 47 % of the Nbio loadings in the 1980s. Hence, loadings from land and atmosphere have only decreased by 10 % points since the 1980s: from 47 to 37 %. The largest sink of TN in the study areas is advection to the adjacent seas (71 %) whereas denitrification and burial only accounts for 17 and 11 %, respectively. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83700
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Bioscience, Aarhus University, Frederiksborgvej 399, PO Box 358, 4000 Roskilde, Denmark; Marine Biological Section, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
Recommended Citation:
Jørgensen L.,Markager S.,Maar M.. On the importance of quantifying bioavailable nitrogen instead of total nitrogen[J]. Biogeochemistry,2014-01-01,117(2018-02-03)