DOI: 10.1002/2014GL059649
论文题名: Shifts in biological productivity inferred from nutrient drawdown in the southern Beaufort Sea (2003-2011) and northern Baffin Bay (1997-2011), Canadian Arctic
作者: Bergeron M. ; Tremblay J.-E.
刊名: Geophysical Research Letters
ISSN: 0094-10532
EISSN: 1944-10263
出版年: 2014
卷: 41, 期: 11 起始页码: 3979
结束页码: 3987
语种: 英语
英文关键词: Arctic
; Baffin Bay
; Beaufort Sea
; nutrients
; primary production
Scopus关键词: Ecology
; Nitrates
; Sea ice
; Silicates
; Water levels
; Arctic
; Baffin Bay
; Beaufort sea
; Biological productivity
; Net community productions
; Nitrate consumption
; Primary production
; Temporal shifts
; Nutrients
; coastal zone
; net ecosystem production
; nitrate
; plant community
; polynya
; spatiotemporal analysis
; water column
; Arctic Ocean
; Baffin Bay [Arctic Ocean]
; Beaufort Sea
; Canada
; Canadian Arctic
; Bacillariophyta
英文摘要: This paper reports the first in situ evidence of change in the net biological productivity of high-latitude western Arctic seas. Estimates of seasonal drawdown for major plant nutrients show that net community production (NCP) shifted differently in two contrasted Canadian oceanographic settings. In the stratified southeast Beaufort Sea, seasonal nitrate consumption increased 1.6-fold between 2003-2004 and 2010-2011. The concomitant thickening of the nitrate-depleted layer in summer/fall implies that subsurface chlorophyll maxima now consume nutrients over a larger extent of the water column. Meanwhile, nitrate consumption in the once productive North Water Polynya declined by 65% and is now nearly on par with the oligotrophic coastal Beaufort Sea. This decline is attributed to freshening and increased stratification. Commensurate changes in silicate and phosphate drawdown in the two regions indicate that diatoms drove the spatial and temporal shifts in NCP. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901886338&doi=10.1002%2f2014GL059649&partnerID=40&md5=80c77c440cf4b574da16f44b4c79ce7a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7796
Appears in Collections: 气候减缓与适应
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作者单位: Québec-Océan, Département de Biologie, Université Laval, Quebec, QC, Canada
Recommended Citation:
Bergeron M.,Tremblay J.-E.. Shifts in biological productivity inferred from nutrient drawdown in the southern Beaufort Sea (2003-2011) and northern Baffin Bay (1997-2011), Canadian Arctic[J]. Geophysical Research Letters,2014-01-01,41(11).