DOI: 10.1002/2017JG004275
Scopus记录号: 2-s2.0-85042224107
论文题名: Seasonal and Spatial Changes in Trichodesmium Associated With Physicochemical Properties in East China Sea and Southern Yellow Sea
作者: Jiang Z. ; Li H. ; Zhai H. ; Zhou F. ; Chen Q. ; Chen J. ; Zhang D. ; Yan X.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 2 起始页码: 509
结束页码: 530
语种: 英语
英文关键词: controlling factors
; distribution pattern
; East China Sea
; Kuroshio
; southern Yellow Sea
; Trichodesmium
Scopus关键词: algal bloom
; carbon budget
; cyanobacterium
; nitrogen cycle
; nitrogen fixation
; physicochemical property
; population structure
; seasonal variation
; spatial variation
; spatiotemporal analysis
; water column
; East China Sea
; Kuroshio Current
; Pacific Ocean
; Taiwan Warm Current
; Yellow Sea
; Trichodesmium
英文摘要: Trichodesmium is broadly distributed and occasionally blooms in the East China Sea (ECS) and southern Yellow Sea, where it contributes to local N and C budgets. However, its population structure, spatiotemporal distribution, controlling factors, and N2 fixation remain poorly documented. Here we provide high spatial resolution data sets of Trichodesmium during the four seasons of 2011–2012 using water- and net-collected methods. The net-collected method captures colonial trichomes of Trichodesmium effectively but results in an underestimation of free trichomes. Colonies are rarely observed and occur only on the ECS shelf, which are easily missed in water-collected samples. Depth-integrated densities of Trichodesmium were found to be significantly higher in warm seasons than in cold seasons. Maximum densities in the water column were generally found at depths of 10–50 m. Trichodesmium thrives on the oligotrophic, warm, offshore ECS shelf (controlled by the Kuroshio and Taiwan Warm Current), but restrains in the cold southern Yellow Sea and the eutrophic, inshore ECS. Seasonal and spatial variations in Trichodesmium are closely correlated with physicochemical properties (mainly temperature and P), which are primarily controlled by circulation alteration and water mass movement. The N2 fixation rates of Trichodesmium in the ECS in summer and autumn (>20°C) are roughly estimated at 17.1 and 41.7 μmol N m−2 d−1 under nonbloom conditions, which potentially contribute to 81% and 57% of biological N2 fixation, respectively. Compared with historical data since the 1970s, Trichodesmium densities have increased considerably in all seasons, and the distribution boundary has shifted northward under regional warming and hydrological changes. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114610
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China; Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Marine College of Ningbo University, Ningbo, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China
Recommended Citation:
Jiang Z.,Li H.,Zhai H.,et al. Seasonal and Spatial Changes in Trichodesmium Associated With Physicochemical Properties in East China Sea and Southern Yellow Sea[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(2)