气候变化领域集成服务门户(CCPortal): Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean

CCPortal

DOI	10.1029/2017GB005869
	Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean
	Shiozaki T.; Bombar D.; Riemann L.; Sato M.; Hashihama F.; Kodama T.; Tanita I.; Takeda S.; Saito H.; Hamasaki K.; Furuya K.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1028
结束页码	1044
卷号	32 期号:7
英文摘要	The import of nitrogen via dinitrogen fixation supports primary production, particularly in the oligotrophic ocean; however, to what extent dinitrogen fixation influences primary production, and the role of specific types of diazotrophs, remains poorly understood. We examined the relationship between primary production and dinitrogen fixation together with diazotroph community structure in the oligotrophic western and eastern South Pacific Ocean and found that dinitrogen fixation was higher than nitrate-based new production. Primary production increased in the middle of the western subtropical region, where the cyanobacterium Trichodesmium dominated the diazotroph community and accounted for up to 7.8% of the phytoplankton community, and the abundance of other phytoplankton taxa (especially Prochlorococcus) was high. These results suggest that regenerated production was enhanced by nitrogen released from Trichodesmium and that carbon fixation by Trichodesmium also contributed significantly to total primary production. Although volumetric dinitrogen fixation was comparable between the western and eastern subtropical regions, primary production in the western waters was more than twice as high as that in the eastern waters, where UCYN-A1 (photoheterotroph) and heterotrophic bacteria were the dominant diazotrophs. This suggests that dinitrogen fixed by these diazotrophs contributed relatively little to primary production of the wider community, and there was limited carbon fixation by these diazotrophs. Hence, we document how the community composition of diazotrophs in the field can be reflected in how much nitrogen becomes available to the wider phytoplankton community and in how much autotrophic diazotrophs themselves fix carbon and thereby influences the magnitude of local primary production. ©2018. The Authors.
英文关键词	diazotroph community; dinitrogen fixation; new production; primary production
语种	英语
scopus关键词	bacterium; carbon fixation; community dynamics; community structure; cyanobacterium; nitrogen fixation; oligotrophic environment; phytoplankton; primary production; subtropical region; Pacific Ocean; Pacific Ocean (South); Prochlorococcus; Trichodesmium
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129811
作者单位	Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan; Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan; Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark; Now at Division of Life Science, The Hong Kong University of Science and Technology, Hong Kong; Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan; Now at Japan Sea National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Niigata, Japan; Now at Research Center for Subtropical Fisheries, Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Okinawa, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan; Now at Graduate School of Engineer...
推荐引用方式 GB/T 7714	Shiozaki T.,Bombar D.,Riemann L.,et al. Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean[J],2018,32(7).
APA	Shiozaki T..,Bombar D..,Riemann L..,Sato M..,Hashihama F..,...&Furuya K..(2018).Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean.Global Biogeochemical Cycles,32(7).
MLA	Shiozaki T.,et al."Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean".Global Biogeochemical Cycles 32.7(2018).