영암호 저서동물군집에 미친 하구둑 건설의 영향 KCI

Title
영암호 저서동물군집에 미친 하구둑 건설의 영향
Alternative Title
Ecological Impact of the Dyke Construction on the MarineBenthos Community of the Oligohaline Youngam Lake
Author(s)
임현식; 최진우
Publication Year
2005-06
Abstract
To assess the macrobenthic community of oligohaline Youngam Lake, which is located at the Youngsan Watershed on the southwest part of Korea, macrobenthic fauna were collected at 45 stations during May, 2002. A total of 16 species of macrofauna were recorded with a mean density of 240 individuals per m2 and a mean biomass of 7.07g wet weight per m2. Major dominant faunal groups were crustacean arthropods in terms of the number of species and abundance, and polychaete annelids in terms of biomass. The mean grain size was 5.7ø which was dominated by silt fraction. The hydrological environment of the lake was characterised as an oligohaline environment with a mean surface water temperature of 17.8℃ and a mean salinity of 2.08psu. The major dominant species were amphipods, Corophium sp. (31%) and Jesogammarus sp. (25%). Lower values of species diversity (H') with a mean of 0.81 (less than 1.0 from most stations) reflected the overall poor faunal diversity in this area. Multivariate analysis suggested that this benthic faunal community could be divided into four sub-regions such as the area from lake proper to water channel to the south, the stations located at the entrance and northern water channel, the stations near the dike, and the lake proper area. Freshwater and brackish water species which occurred in each station group were corresponded to the oligohaline salinity regime. Bottom hypoxia appeared in the entrance part of the lake between dyke and lake proper on May, which was resulted from stratification from spring season. These facts imply that marine macrobenthos were severely impacted by low salinity and a consequent hypoxia after embankment of the lake due to the restriction of water circulation.
ISSN
0374-8111
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1987
Bibliographic Citation
한국수산과학회지, v.38, no.3, pp.172 - 183, 2005
Publisher
한국수산과학회
Keywords
Oligohaline; Embankment; Macrobenthos; Hypoxia; Youngam artificial lake; Korea
Type
Article
Publisher
한국수산과학회
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse