Modern distribution of Thalassionema species (Bacillariophyceae) in the Pacific Ocean

Author(s): Tanimura, Yoshihiro; Shimada, Chieko; Iwai, Masao
Author Affiliation(s): Primary:
National Museum of Nature and Science, Division of Paleoenviroment and Paleoecology, Tokyo, Japan
Other:
Akita University, Japan
Kochi University, Japan
Volume Title: Bulletin of the National Museum of Nature and Science. Series C, Geology & Paleontology
Source: Bulletin of the National Museum of Nature and Science. Series C, Geology & Paleontology, Vol.33, p.27-51. Publisher: National Museum of Nature and Science, Tokyo, Japan. ISSN: 1881-9079 CODEN: BNSPD4
Note: In English. Includes 2 appendices. 43 refs.; illus., incl. 2 tables, 3 plates
Summary: Using core-top sediment samples, we measured the modern distribution of Thalassionema species and their morphological types in the Pacific Ocean. Strong correlations between Thalassionema distributions in the sediments (T. pseudonitzschioides and six morphological variants of T. bacillare and T. nitzschioides) and the modern gyral circulation systems over sediments in the Pacific were found. Two morphological variants of T. nitzschioides s. 1. and T. pseudonitzschioides were common in sediments under the Subpolar Gyre and under the region northwest of the Kuroshio Front in the North Pacific. One morphological type of T. nitzschioides s. 1. and two morphological variants of T. bacillare were widely distributed in the sediments under the Subtropical Gyres of the North and South Pacific and under the Equatorial Current System. Three types of T. nitzschioides s. 1. were primarily restricted to the sediments south of the Subtropical Convergence in the South Pacific. The Kuroshio Front that forms between the Subtropical and Subpolar Gyres and the Subtropical Convergence in the South Pacific are distinct boundaries of the distributions of Thalassionema species in the Pacific Ocean.
Year of Publication: 2007
Research Program: DSDP Deep Sea Drilling Project
Key Words: 09 Paleontology, Paleobotany; Algae; Bacillariophyceae; Biogeography; Cenozoic; Deep Sea Drilling Project; Diatoms; Kuroshio; Living taxa; Marine environment; Marine sediments; Miocene; Modern analogs; Morphology; Neogene; Ocean circulation; Pacific Ocean; Paleo-oceanography; Paleocurrents; Plantae; SEM data; Sediments; Taxonomy; Tertiary; Thalassionema
Record ID: 2010032962
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.

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