DOI: 10.1002/2014GL059835
论文题名: Large-scale impact of the island mass effect through nitrogen fixation in the western South Pacific Ocean
作者: Shiozaki T. ; Kodama T. ; Furuya K.
刊名: Geophysical Research Letters
ISSN: 0094-10120
EISSN: 1944-9851
出版年: 2014
卷: 41, 期: 8 起始页码: 2907
结束页码: 2913
语种: 英语
英文关键词: island mass effect
; nitrogen fixation
; nitrogen isotope
; Trichodesmium
Scopus关键词: Ecosystems
; Ionization of gases
; Isotopes
; Nitrogen fixation
; Runoff
; Equatorial upwelling
; Mass effects
; Nitrogen isotopes
; Phosphate concentration
; South pacific oceans
; Subtropical regions
; Suspended particles
; Trichodesmium
; Landforms
; biological production
; biomass
; cyanobacterium
; nitrogen fixation
; nitrogen isotope
; nutrient budget
; phosphate
; primary production
; runoff
; seawater
; suspended load
; terrigenous deposit
; Pacific Ocean
; Pacific Ocean (South)
; Trichodesmium
英文摘要: We describe a new mechanism for the island mass effect fueled by nitrogen fixation. The nitrogen fixation activities and δ15N of suspended particles in the surface water in the South Pacific were examined. Active nitrogen fixation and abundant Trichodesmium spp. were observed near islands in the western subtropical region, which was attributable to the material supplied by land runoff. High primary production was extensively centered around the islands and was characterized by low δ15N of suspended particles and a reduction in phosphate concentrations at the surface compared with the subtropical gyre and eastern equatorial upwelling. This suggested that Trichodesmium spp. were advected to areas remote from these islands, and consequently, the elevated primary production fueled by nitrogen fixation extended over a large area around them. Because the proposed island mass effect is triggered by a terrigenous nutrient supply, this ecosystem is potentially vulnerable to human activity on small islands. Key Points A new mechanism for island mass effect fueled by nitrogen fixation is proposed The area of active primary production is >40 times larger than that of islands The occurrence of this oceanic ecosystem is triggered by land runoff ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898740514&doi=10.1002%2f2014GL059835&partnerID=40&md5=5d85afb3e2acfdab125add17f63dc4be
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7384
Appears in Collections: 气候减缓与适应
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作者单位: Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
Recommended Citation:
Shiozaki T.,Kodama T.,Furuya K.. Large-scale impact of the island mass effect through nitrogen fixation in the western South Pacific Ocean[J]. Geophysical Research Letters,2014-01-01,41(8).