DOI: 10.1016/j.marpolbul.2018.02.037
Scopus记录号: 2-s2.0-85042592341
论文题名: Nitrogen removal through N cycling from sediments in a constructed coastal marsh as assessed by 15N–isotope dilution
作者: Ro H.-M. ; Kim P.-G. ; Park J.-S. ; Yun S.-I. ; Han J.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2018
卷: 129, 期: 1 起始页码: 275
结束页码: 283
语种: 英语
英文关键词: 15N–isotope dilution
; Coastal salt marsh
; Constructed marsh
; Denitrification
; Nitrogen removal
; Wetland
Scopus关键词: Denitrification
; Isotopes
; Nitrogen
; Nitrogen removal
; Salt removal
; Sediments
; Closed systems
; Constructed marshes
; Heterotrophic denitrification
; Isotope dilutions
; N mineralization
; N transformation
; Salt marshes
; Soil organic C
; Wetlands
; ammonia
; nitrogen
; nitrogen 15
; organic carbon
; organic nitrogen
; coastal sediment
; concentration (composition)
; constructed wetland
; denitrification
; dilution
; nitrogen
; nitrogen cycle
; nitrogen isotope
; saltmarsh
; Article
; biotransformation
; denitrification
; isotope dilution assay
; mineralization
; nitrification
; nitrogen cycling
; nitrogen removal
; Phragmites australis
; salinity
; salt marsh
; seashore
; sediment
; South Korea
; Sihwa Lake
; South Korea
; Phragmites australis
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Constructed coastal marsh regulates land-born nitrogen (N) loadings through salinity-dependent microbial N transformation processes. A hypothesis that salinity predominantly controls N removal in marsh was tested through incubation in a closed system with added-15NH4 + using sediments collected from five sub-marshes in Shihwa marsh, Korea. Time-course patterns of concentrations and 15N–atom% of soil-N pools were analyzed. Sediments having higher salinity and lower soil organic-C and acid-extractable organic-N exhibited slower rates of N mineralization and immobilization, nitrification, and denitrification. Rates of denitrification were not predicted well by sediment salinity but by its organic-C, indicating heterotrophic denitrification. Denitrification dominated N-loss from this marsh, and nitrogen removal capacity of this marsh was estimated at 337 kg N day−1 (9.9% of the daily N-loadings) considering the current rooting depth of common reeds (1.0 m). We showed that sediment N removal decreases with increasing salinity and can increase with increasing organic-C for heterotrophic denitrification. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/88395
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, South Korea; Department of Bio-Environmental Chemistry and Institute of Life Science and Natural Resources, Wonkwang University, Iksan, South Korea
Recommended Citation:
Ro H.-M.,Kim P.-G.,Park J.-S.,et al. Nitrogen removal through N cycling from sediments in a constructed coastal marsh as assessed by 15N–isotope dilution[J]. Marine Pollution Bulletin,2018-01-01,129(1)