HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第68巻 第1号 >

Different Nutrient Availabilities of Surface and Bottom Water under Nutrient-depleted Conditions during Bloom Formation of the Toxic Dinoflagellate Alexandrium tamarense in Osaka Bay, Japan

Files in This Item:
bull.fish.68.1.7.pdf978.19 kBPDFView/Open
Please use this identifier to cite or link to this item:http://doi.org/10.14943/bull.fish.68.1.7

Title: Different Nutrient Availabilities of Surface and Bottom Water under Nutrient-depleted Conditions during Bloom Formation of the Toxic Dinoflagellate Alexandrium tamarense in Osaka Bay, Japan
Authors: Natsuike, Masafumi Browse this author
Shiraishi, Tomotaka Browse this author
Ishii, Ken-Ichiro Browse this author
Yamamoto, Keigo Browse this author
Nakajima, Masaki Browse this author
Sawayama, Shigeki Browse this author →KAKEN DB
Imai, Ichiro Browse this author →KAKEN DB
Keywords: Alexandrium tamarense
Skeletonema
Nutrients
Bioavaiilability
Osaka Bay
Algal growth potential
Limiting
Issue Date: 16-Mar-2018
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 68
Issue: 1
Start Page: 7
End Page: 16
Abstract: Alexandriium tamarense is a toxic dinoflagellate known to produce neurotoxins cause paralytic shellfish poisoning to human and marine animals. To understand the growth dynamics of A.tamarense, the seasonal changes in A,tamarense vegetative cells and environmental factors were evaluated using monthly field observations at two fixed stations in Osaka Bay, Japan, from January to May 2008. Additionally, a bioassay with axenic A.tamarense clonal cultures was performed to determine the growth potentials and growth-limiting nutrients of seawater samples collected during the field observations. The density of A.tamarense increased from February to April, and depletions of dissolved phosphate and silicate were observed in the surface layer during this period. The bioassay showed that phosphorous limitation occurred at the surface water of one station during March and April, while nitrogen limitation occurred in the bottom water. Moreover, at the other station, the growth potentials of the bottom water were higher than those of the surface water during February and April. Thus, the differences of nutrient availabilities between surface and bottom water during spring in Osaka Bay potentially allow A.tamarense to grow with nutrients uptake from bottom water by vertical migration.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/68502
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第68巻 第1号

Export metadata:

OAI-PMH ( junii2 , jpcoar )


 

Feedback - Hokkaido University