KOPRI Repository

Strong bottom-up effects on phytoplankton community casued by a rainfall during spring and summer in Sagami Bay, Japan

Cited 19 time in scopus
Metadata Downloads
Title
Strong bottom-up effects on phytoplankton community casued by a rainfall during spring and summer in Sagami Bay, Japan
Authors
Seung Ho Baek
Tomohiko Kikuchi
Myung-Soo Han
Kim, Hyun-cheol
Shinji Shinmode
Subject
Geology; Marine & Freshwater Biology; Oceanography
Keywords
Abiotic factors; Algal blooms; Nutrent deficiency; Salinity effects
Issue Date
2008
Publisher
ELSEVIER
Citation
Seung Ho Baek, et al. 2008. "Strong bottom-up effects on phytoplankton community casued by a rainfall during spring and summer in Sagami Bay, Japan". JOURNAL OF MARINE SYSTEMS, 1(1): 253-264.
Abstract
To assess the consequences of bottom-up effects onphytoplankton community composition during the rainy season, phytoplankton levels and environmental factors were monitored daily from 12 April to 22 July 2003 in Sagami Bay, Japan. The relevant environmental factorswere analyzed using cross-correlation analyses. Based on time-series analysis, lowsurface salinity conditions lasting 0 or 2 days after heavy rainfalls resulted in significant nutrient loading, such as dissolved inorganic nitrogen (DIN), into the coastal area. Also, Chlorophyll-a (Chl-a) concentration frequently increased 2 and 6 days after rainfall. Based on the high total Chl-a concentration, the time was divided into three periods, from1 to 11May (Period A), 26May to 9 June (Period B) and 30 June to 22 July (Period C). The phytoplankton assemblages during Period A were dominated by two dinoflagellates, Ceratium furca and Ceratiumfusus. Prior to these species blooming, the heterotrophic dinoflagellate Noctiluca scintillans was dominant. During Period B, the phytoplankton communities were dominated primarily by the diatoms Rhizosolenia delicatula, Hemiaulus sinensis and Navicula spp. Finally, Cerataulina dentata, Rhizosolenia spp., Lauderia borealis and Neodelphineis pelagica were dominant during Period C. After increases in phytoplankton abundance, available nitrogen (N) and phosphorous (P) were consumed and exhausted, which were considered a potential cause of the shift in the dominant organisms from large diatoms to pico- and nano-plankton in the low Chl-a environment. In particular, silicate (Si) was not a major limiting factor for phytoplankton production, since the Si:DIN and Si:P ratios clearly demonstrated that there were no any potential stoichiometric Si limitations, and almost all silicate concentrationswere N2.0 μMduring this study. Our results reveal that nutrient sources supplied by river discharge are a main cue for strong bottom?up effects on algal bloom succession during the early
URI
http://repository.kopri.re.kr/handle/201206/5752
DOI
http://dx.doi.org/10.1016/j.jmarsys.2008.10.005
Files in This Item
There are no files associated with 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