Browse > Article
http://dx.doi.org/10.5657/kfas.2005.38.3.172

Ecological Impact of the Dyke Construction on the Marine Benthos Community of the Oligohaline Youngam Lake  

LIM Hyun-Sig (Department of Marine Resources, Mokpo National University)
CHOI Jin-Woo (Southern Coastal Environment Research Division, South Sea Institute, KORDI)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.38, no.3, 2005 , pp. 172-183 More about this Journal
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 $m^2$ and a mean biomass of 7.07 g wet weight per $m^2$. 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 $5.7\;{\phi}$ 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 $17.8^{\circ}C$ and a mean salinity of 2.08 psu. The major dominant species were amphipods, Corophium sp. ($31\%$) and Jesogammarus sp. ($25\%$). Lowe. 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.
Keywords
Oligohaline; Embankment; Macrobenthos; Hypoxia; Youngam artificial lake; Korea;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Lim, H.S. and K.Y. Park. 1999. Community structure of macrobenthos in the subtidal soft bottom in semienclosed Youngsan River Esturarine Bay, Southwest coast of Korea. J. Kor. Fish. Soc., 32, 320-332
2 Lim, H.S., K.Y. Park, B.S. Ihm, J.S. Lee and S.D. Chu. 1997. Macrozoobenthic community on the mudtidalflat aruond Mokpo coastal area, Korea. Kor. J. Ecol., 20, 355-365
3 Park, H.S., H.S. Lim and J.S. Hong. 2001. Spatio- and temporal patterns of benthic environment and macrobenthos community on subtidal soft-bottom in Chonsu Bay, Korea. J. Kor. Fish. Soc., 33, 262-271
4 Saiz-Salinas, J.I. and G. Frances-Zubillaga, 1997. Tidal zonation on mud flats in a polluted estuary caused by oxygen-depleted water. J. Exp. Mar. Biol. Eco., 209, 157-170   DOI   ScienceOn
5 SCBW (Symposium on the Classification of Brackish Waters). 1958. The Venice System for the classification of marine waters according to salinity. Oikos, 9, 311-312
6 Shannon, C.E. and W. Weaver. 1963. The Mathematical Theory of Communication. Univ. of Illinois Press, Urbana, pp. 125
7 Shin, S. 1985. A study on the benthic community in Haenam Bay, Korea. Bull. Inst. Littoral Biota, Mokpo Natl. Univ., 2, 41-55
8 Shin, S. 1993. Study on the environment and benthos in the intertidal zone of Haenam peninsula, Korea. Bull. Kor. Fish. Soc., 26, 63-75
9 Lim, H.S. and J.S. Hong. 2002. Spatial distribution of macrozoobenthos along the salinity gradient and sedimentary environment in the Watancheon estuary, Beobseongpo, southwest coast of Korea. The Sea, J. Korean Soc. Oceangr., 7, 8-19
10 Brey, J.R. and J.T. Curtis. 1957. An ordination of the upland forest communities of southern Wisconsin. Ecol. Monogr., 27, 325-349   DOI   ScienceOn
11 Folk, R.L. and W.C. Ward. 1957. Brazos River Bar. A study in the significance of grain-size parameters, J. Sed. Pet. 27, 3-26   DOI
12 Hong, J.S., R.H. Jung, I.S. Seo, K.T. Yoon, B.M. Choi and J. W. Yoo. 1997. How are the spatio-temporal distribution patterns of benthic macrofauna communities affected by the construction of Shihwa dike in the west coast of Korea? J. Kor. Fish. Soc., 30, 882-895
13 Hong, J.S., I.S. Seo, C.G. Lee, S.P. Yoon and R.H. Jung. 2000. An ecological feature of benthic macrofauna during summer 1997 in Namdaechon estuary, Yangyang, Korea. J. Kor. Fish. Soc., 33, 230-237
14 Lim, H.S. and J.W. Chio. 2001. Community structure of subtidal macrobenthos in Hampyung Bay during autumn in 1997, southwest coast of Korea. J. Kor. Fish. Soc., 34, 327-339
15 Ishikawa, T., T. Narita and J. Urabe. 2004. Long-term changes in the abundance of Jesogammarus annandalei (Tattersall) in Lake Biwa. Limnol. Oceanogr., 49, 1840-1847   DOI   ScienceOn
16 Johnson, R.K. and T. Widerholm. 1992. pelagic-benthic coupling-the importance of diatom interannual variability for population oscillations of Monoporeia affinis. Limnol. Oceanogr., 37, 1596-1607   DOI   ScienceOn
17 Lim, H.S. 1993. The ecology of the macrozoobenthos in the Chinhae Bay. Ph.D. Thesis. Pusan Fisheries University, pp. 311
18 Lim, H.S. and K.Y. Park. 1998. Community structure of the macrobenthos in the soft bottom of Youngsan River Estuary, Korea. 2. The occurrence of summer hypoxia and benthic community. J. Kor. Fish. Soc., 31, 343-352