Changes in macrobentic community structure on Gunsan tidal flat after the closing of the Saemangeum 4th dyke SCOPUS KCI

Title
Changes in macrobentic community structure on Gunsan tidal flat after the closing of the Saemangeum 4th dyke
Author(s)
Koo, B.J.; Shin, S.-H.; Woo, H.J.; Kim, E.-S.; Je, J.G.
KIOST Author(s)
Koo, Bon Joo(구본주)Woo, Han Jun(우한준)
Publication Year
2008
Abstract
With the reduction of tidal currents by the closing of the Saemangeun 4th dyke, sedimentary environment on the Gunsan tidal flat, the nearest inner flat from the 4th dyke, has been severely changed, which might affect macrobenthic assemblages on the habitats. In order to investigate changes in macrobenthic community structure on Gunsan tidal flat, field surveys were seasonally conducted at seven stations from April 2002 to November, 2005. Sedimentary facies on the study area were shifted into mud-dominant facies. The fine sediment has been greatly deposited on the tidal flat with accumulation of organic materials after closing the water passage of 4th dyke section. These drastic variations in environments gave rise to change in macrobenthic community structure. Since the closure of the 4th dyke, the number of species of macrobenthos has gradually decreased. And the filter feeders and sand-favored species such as Urothoe convexa, Macrophthalmus dilatatus, Umbonium thomasi, and Mactra veneriformis have been replaced by the deposit feedors such as Macrophthalmus japonicus and Ilyoplax pingi. MDS ordination based on Bray-Curtis similarity from forth-root transformed species abundance data showed that the macrobenthic communities have passed through three succession stages from 2002 to 2005. During the third stage of 2005 opportunistic species such as Prionospio japonica, Heteromastus filiformis and Sinocorophium sinensis increased in population on the tidal flat.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4583
DOI
10.4217/OPR.2008.30.4.497
Bibliographic Citation
Ocean and Polar Research, v.30, no.4, pp.497 - 507, 2008
Publisher
Korea Ocean Research and Development Institute
Subject
abundance; coastal sediment; community structure; deposition; environmental effect; facies; macrobenthos; tidal current; tidal flat; Asia; Eurasia; Far East; Korea; Kunsan; North Cholla; Saemangeum; South Korea; Heteromastus filiformis; Ilyoplax pingi; Macrophthalmus dilatatus; Macrophthalmus japonicus; Mactra veneriformis; Prionospio japonica; Umbonium thomasi; Urothoe
Keywords
4th Dyke; Macrobenthic community; Saemangeum; Sediment deposition; Tidal flat
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Coastal Sedimentary Processes,Micropaleontology(Foraminifera and Pollen),Paleoenvironmental Reconstruction,연안퇴적작용,미고생물(유공충 및 화분),고환경 복원

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