KOPRI Repository

Biomass, production, and control of heterotrophic bacterioplankton during a late phytoplankton bloom in the Amundsen Sea Polynya, Antarctica

Cited 5 time in scopus
Metadata Downloads
Title
Biomass, production, and control of heterotrophic bacterioplankton during a late phytoplankton bloom in the Amundsen Sea Polynya, Antarctica
Authors
Hyun, Jung-Ho
Lee, Sang H.
Choi, Ayeon
Yang, Eun Jin
Kim, Sung-Han
Keywords
Amundsen Sea; Bacterial production; Microbial loop; Phaeocystis bloom; Polynya
Issue Date
2016
Citation
Hyun, Jung-Ho, et al. 2016. "Biomass, production, and control of heterotrophic bacterioplankton during a late phytoplankton bloom in the Amundsen Sea Polynya, Antarctica". DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 123(1): 102-112.
Abstract
We investigated the heterotrophic bacterial biomass and production in February 2012, in four habitats (a polynya, sea-ice zone, ice shelf, and the open sea) in the Amundsen Sea to determine the spatial distribution, controlling factors, and ecological role of the bacteria during a late phytoplankton bloom by Phaeocystis antarctica. Bacterial abundance (BA) and production (BP) were highest at the center of the polynya, and both were signi?cantly correlated with phytoplankton biomass. BP accounted for average 17% of the organic carbon produced by phy- toplankton primary production (PP), which is higher than the average BP:PP ratio reported in most open ocean. The abundance of heterotrophic nano?agellates (HNF) was correlated with the BA, and the average bacteria:HNF ratio (260) was lower than the values reported in most marine environments (400?1000), including the Ross Sea Polynya (800). Evidence for a tight coupling of bacteria and phytoplankton activities on the one hand and intense HNF grazing on bacteria on the other could be found in the high BP:PP and low bacteria:HNF ratios, respectively. Interestingly, these data were accompanied by low particulate carbon export ?uxes measured during the late Phaeocystis bloom. Together, these results indicated that the microbial loop plays a signi?cant role in the bio- geochemical carbon cycle and food web processes in the Amundsen Sea Polynya.
URI
http://repository.kopri.re.kr/handle/201206/7416
DOI
http://dx.doi.org/10.1016/j.dsr2.2015.10.001
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse