Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Chemical Water Quality and Multi-metric Eco-health Model Assessments in Baekma River

백마강의 화학적 수질특성 및 다변수 생태 건강도 모델 평가

  • Han, Jeong-Ho (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University) ;
  • Kim, Hyun-Mac (Ecosystem Assessment Division National Institute of Environmental Research) ;
  • An, Kwang-Guk (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
  • 한정호 (충남대학교 생명과학과) ;
  • 김현맥 (국립환경과학원 자연평가 연구팀) ;
  • 안광국 (충남대학교 생명과학과)
  • Received : 2013.04.16
  • Accepted : 2013.05.29
  • Published : 2013.06.30
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Abstract

The objectives of this study were to analyze chemical the water quality related to the fish community and to evaluate the ecosystem health based on the faunal composition and guild structure in 2007 in Baekma River. Mean concentrations of biological oxygen demand (BOD) and chemical oxygen demand (COD) were 2.8 and $4.0mg\;L^{-1}$, respectively and total nitrogen (TN) and total phosphorus (TP) were $5.0mg\;L^{-1}$ and $158{\mu}g\;L^{-1}$, which is indicating that the river is in an eutrophic state. Especially, organic pollution and eutrophication occurred in the downstream reach of Baekma River. A total of 19 fish species were collected during the study and the most dominant species was Opsariichthys uncirostris amurensis accounted 48% of the total abundances. The proportion of sensitive species was low (2.3%), compared with that of tolerant species (71.8%). These results suggest that tolerant species and the biotic quality of the fish community was severely degraded. According to the multi-metric model, the Index of Biological Integrity (IBI), the mean model value of the fish community in Baekma River was estimated as 14.8 indicating a "poor" condition. The minimum values of the IBI were observed in the downstreams, and this was mainly attributed to chemical pollutions of nutrients (N, P) and organic matters.

본 연구에서는 2007년의 금강 중 하류부의 백마강의 상류에서 하류에 이르는 5개 지점에서 이 화학적 수질특성을 분석하였고, 그 곳에 서식하는 어류군집의 어종분포 및 길드분석을 통해 군집구조 및 생태건강도 특성을 평가하였다. 전형적인 하류하천인 백마강의 BOD, COD농도는 각각 평균 $2.8mg\;L^{-1}$, $4.0mg\;L^{-1}$였고, TN, TP의 농도는 각각 $5.0mg\;L^{-1}$, $158{\mu}g\;L^{-1}$로서 이미 부영양 상태로 판정되었으며, 특히 하류 지점에서는 유기물오염 및 부영양화 현상이 뚜렷했다. 5개 지점에서 출현한 어종은 총 19종으로 나타났고, 내성종인 끄리는 가장높은 상대 풍부도(48%)를 보였다. 백마강에서 민감종의 비율(2.3%)은 낮은 반면 내성종 비율(71.8%)은 높게 나타나 중.하류 하천에서의 전형적인 길드 변화 현상이 확연히 나타났다. 하천 생태건강도 평가 (IBI)에 따르면, 백마강에서 생물보전지수는 14.8로서 악화상태인 것으로 나타났고, 수질에서 보여준 바와 같이 하류부에서는 극명하게 악화된 것으로 나타났다. 특히 하류구간 (S3~S5)의 낮은 건강도 지수값은 하수종말처리장으로부터 나온 배출수의 화학적 영향이 큰 것으로 사료되었다. 이는 생태건강도 모델값이 수질 특성을 잘 반영하는 객관성 있는 평가기법으로 활용 될 수 있음을 제시하였다. 따라서 백마강의 생태계 보존을 위해서는 향후 이 구간에 대한 하천복원 및 지속적인 생태모니터링이 중요하다고 판단된다.

Keywords

References

  1. An KG. 2003. Spatial and temporal variabilities of nutrient limitation based on in situ experiments of nutrient enrichment bioassay. J. Environ. Sci. Heal. A. 38:687-882.
  2. An KG, DH Yeom and SK Lee. 2001b. Rapid bioassessments of Kap stream using the index of biological integrity. Korean J. Environ. Biol. 19:261-269.
  3. An KG, SH Jung and SS Choi. 2001a. An evaluation on health conditions of Pyong-Chang river using the index of biological integrity (IBI) and qualitative habitat evaluation index (QHEI). Korean J. Limnol. 34:153-165.
  4. An KG and JH Kim. 2005. A diagnosis of ecological health using a physical habitat assessment and multimetric fish model in Daejeon stream. Korean J. Limnol. 38:361-371.
  5. An KG, JY Lee, DY Bae, JH Kim, SJ Hwang, DH Won, JK Lee and CS Kim. 2006. Ecological assessments of aquatic environment using multi-metric model in major nationwide stream watersheds. J. Kor. Water Qual. 22:796-804.
  6. An KG, JY Lee and HN Jang. 2005. Ecological health assessments and water quality patterns in Youdeung stream. Korean J. Limnol. 38:341-351.
  7. Barbour MT, J Gerritsen, BD Snyder and JB Stribling. 1999. Rapid bioassessment protocols for use in streams and wadeable rivers: periphyton, benthic mmcroinvertebrates and fish. 2nd Ed. EPA 841-B-99-002.
  8. Choi KC. 1987. Nature of Chungnam. Jeong-mun Publishing Co., Ltd. pp. 206-213.
  9. Hugueny B, S Camara, B Samoura and M Magassouba. 1996. Applying an index of biotic integrity based on communities in a west african river. Hydrobiologia 331:71-78. https://doi.org/10.1007/BF00025409
  10. Joo GJ, HW Kim and K Ha. 1997. The development of stream ecology and current status in Korea. Korean J. Ecol. 20: 69-78.
  11. Karr JR. 1981. Assessment of biotic integrity using fish communities. Fishieries. 6:21-27. https://doi.org/10.1577/1548-8446(1981)006<0021:AOBIUF>2.0.CO;2
  12. Kim IS and JY Park. 2002. Freshwater fishes of Korea. Kyo-hak Publishing Co., Ltd. pp.30-428.
  13. Lee JH and KG An. 2007. Seasonal dynamics of fish fauna and compositions in the Gap stream along with conventional water quality. Kor. J. Limnol. 40:503-510.
  14. Margalef R. 1958. Information theory in ecology. Gen. Syst. 3: 36-71.
  15. MOE/NIER. 2006. Researches for integrative assessment methodology of aquatic environments (III): development of aquatic ecosystem health assessment and evaluation system, The Ministry of Environment/National Institute of Environmental Research (NIER), Incheon, Korea. pp. 39-41.
  16. MOE/NIER. 2008. The survey and evaluation of aquatic ecosystem health in Korea, The Ministry of Environment/ National Institute of Environmental Research, Incheon, Korea. pp. 73-100.
  17. Ohio EPA. 1989. Biological criteria for the protection of aquat-ic life. Vol.III, Standardized biological field sampling and laboratory method for assessing fish and macroinvertebrate communities.
  18. Pielou EC. 1975. Ecological diversity. Wiley. New York. 165pp.
  19. Ricciardi A and JB Rasmussen. 1999. Extinction rates of North American freshwater fauna. Conserv. Biol. 13:1220-1222. https://doi.org/10.1046/j.1523-1739.1999.98380.x
  20. Shannon CE and W Weaver. 1949. The mathematical theory of communication. University of Illinois Press, Urbana. 117pp.
  21. Simpson EH. 1949. Measurement of diversity. Nature 163: 688pp. https://doi.org/10.1038/163688a0
  22. Son YM and HB Song. 2006. Freshwater fish of Geum River. Ji-Sung Publishing Co., Ltd., Seoul, Korea. pp. 30-200.
  23. US EPA. 1993. Fish field and laboratory methods for evaluating the biological integrity of surface waters. EPA 600-R- 92-111. Cincinnati, Ohio 45268.
  24. Yeom DH, KG An, YP Hong and SK Lee. 2000. Assessment of an index of biological integrity (IBI) using fish assemblages in Keum-Ho River, Korea. Korean J. Environ. Biol. 18:215-226.