Dinoflagellate cyst assemblages from the northern shelf sediments of the East China Sea: An indicator of marine productivity SCIE SCOPUS

Cited 6 time in WEB OF SCIENCE Cited 7 time in Scopus
Title
Dinoflagellate cyst assemblages from the northern shelf sediments of the East China Sea: An indicator of marine productivity
Author(s)
Kim, So-Young; Lim, Dhong-Il; Cho, Hyun-Jin
KIOST Author(s)
Lim, Dhongil(임동일)
Publication Year
2012-12
Abstract
The dinoflagellate cyst assemblages from the northern shelf of the East China Sea were examined to assess their potential use as indicators of marine productivity in shelf environments. A characteristic disparity in the species compositions of dinoflagellate cysts between coastal sediments and outer-shelf sediments was observed. Coastal areas affected by fluvial freshwater input adjacent to the Changjiang River mouth were dominated by protoperidinioid species, whereas open sea shelf areas were dominated by gonyaulacoid species. The rarity of protoperidinioid cysts in the shelf sediment is primarily attributable to the deficit of silicate in the waters overlying the northern East China Sea shelf, associated with low supplies of suspended particulate matter from the adjacent continent. This would limit the growth of the protoperidinioid species, which feed on diatoms. In contrast, a constant supply of nitrogen generated by microbial nitrogen fixation appeared to have played an important role in supporting the production of gonyaulacoid species in this shelf region. Thus it was determined that dinoflagellate cyst assemblages in marine sediments are closely linked to significant changes in nutrient composition, leading to a selective advantage for the growth of favored taxa. This result suggests that gonyaulacoid dinoflagellate cysts are a potentially useful proxy indicator for low nutrient concentration levels, especially of silicate, in the shelf environment. (C) 2012 Elsevier By. All rights reserved.
ISSN
0377-8398
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3415
DOI
10.1016/j.marmicro.2012.09.003
Bibliographic Citation
MARINE MICROPALEONTOLOGY, v.96-97, pp.75 - 83, 2012
Publisher
ELSEVIER SCIENCE BV
Keywords
Shelf sediments; Dinoflagellate cyst; Paleoenvironments; East China Sea
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
Related Researcher
Research Interests

Marine Geochemistry,Paleoceanography,Marine Pollution,해양지화학,고해양학,해양오염학

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