표제지
목차
국문초록 10
1. 서론 12
가. 서론 12
나. 연구지역 해황 14
다. 광양만의 매립 현황과 선박 사고 16
2. 재료 및 방법 19
가. 조사 시기와 정점 19
나. 표층 퇴적물 입도 분석 19
다. 저서동물 군집 분석 21
3. 결과 23
가. 표층 퇴적물의 입도분포 변동 23
나. 광양만 저서동물 군집의 장기변동 25
1) 저서동물 군집 25
2) 저서 다모류 군집 28
가) 출현종수 및 서식밀도 29
나) 생태지수 29
다) 우점종 32
3) 군집 분석 36
다. 특정 해역별 저서 동물 군집의 장기변동 39
1) 저서동물 군집 41
2) 저서 다모류 군집 44
가) 출현종수 및 서식밀도 44
나) 생태지수 48
다) 우점종 50
4. 고찰 58
가. 입도분포 및 시기별 변동 58
나. 광양만 저서동물 군집의 장기변동 58
1) 저서동물 군집 58
2) 저서 다모류 군집 61
3) 군집 분석 62
다. 특정 해역별 저서동물 군집의 장기변동 64
1) 저서동물 군집 64
2) 저서 다모류 군집 65
5. 결론 67
참고문헌 69
Abstract 77
Table 1. Mean Density of benthic polychaetes collected in Gwangyang Bay from February 1996 to October 2005 26
Table 2. Ecological characteristics of benthic polychaetes collected in Gwangyang Bay from February 1996 to October 2005 28
Table 3. Dominant polychaetes above 2.0 percentage among total individual numbers collected in Gwangyang Bay from February 1996 to October 2005 33
Tabel 4. Discriminating species(in alphabetical order) determined using the SIMPER(% contribution to A , +, similarity / dissmilarity) analysis 38
Table 5. Comparison of the mean density of benthic polychaetes among 3 regions in Gwangyang Bay 42
Table 6. Comparison of ecological characteristics of benthic polychaetous community among 3 regions in Gwangyang Bay 45
Table 7. Comparison of the mean density(ind. / ㎡) of the dominant species among 3 regions in Gwangyang Bay 51
Table 8. Comparison of the sampling schemes, community types between major bays in the southern coast of Korea 63
Fig. 1. The geomorphology of coastal line and bathymetry of Gwangyang Bay 15
Fig. 2. The variation of coastal line for the Gwangyang Bay(A : Early 1960's, B : Early 1980's, C : Late 1980's, D : Early 1990's, E : Late 1990's, F : After Gwangyang 18
Fig. 3. A map showing the study area and the sampling stations 20
Fig. 4. Horizontal distribution of surface sedimentary facies in Gwangyang Bay(A : February 2003, B : July 2003, C : January 2004, D : July 2004, E : February 2005, F : July 2005) 24
Fig. 5. Long-term variation in mean density of benthic macrofaunal taxa in Gwangyang Bay from February 1996 to October 2005 27
Fig. 6. Long-term variation in species number(A) and mean density(B) of benthic polychaetes in Gwangyang Bay from February 1996 to October 2005 30
Fig. 7. Long-term variation in ecological indices of benthic polychates in Gwangyang Bay from February 1996 to October 2005 31
Fig. 8. Long-term variation of mean density(ind./㎡) of the dominant species in Gwangyang Bay. The dominant species was compared only above 6 species 34
Fig. 9. Long-term variation of mean density(ind./㎡) of the dominant species(except Tharyx sp.) in Gwangyang Bay 35
Fig. 10. Dendrogram showing the result of cluster analysis, bassed on the total species composition 37
Fig. 11. Division of station group after Choi and Koh(1984) in Gwangyang Bay(A : Eastern main channel, B : North channel of Myodo, C : Western inner bay) 40
Fig. 12. Long-term variation in mean density of benthic macrofauna taxa among 3 regions in Gwangyang Bay 43
Fig. 13. Long-term variation in species number of benthic polychaetous community among 3 regions in Gwangyang Bay from February 1996 to October 2005 46
Fig. 14. Long-term variation in mean density of benthic polychaetous community among 3 regions in Gwangyang Bay from February 1996 to October 2005 47
Fig. 15. Long-term variation in ecological indices of benthic polychaetous community among 3 regions in Gwangyang Bay 49
Fig. 16. Long-term variation of mean density(ind./㎡) of the dominant species at Eastern main channel in Gwangyang Bay. The dominant species was compared only above 53
Fig. 17. Long-term variation of mean density(ind./㎡) of the dominant species(except Tharyx sp.) at Eastern main channel in Gwangyang Bay 54
Fig. 18. Long-term variation of mean density(ind./㎡) of the dominant species at North channel of Myodo in Gwangyang Bay. The dominant species was compared only above 55
Fig. 19. Long-term variation of mean density(ind./㎡) of the dominant species at Western inner bay in Gwangyang Bay. The dominant species was compared only above 56
Fig. 20. Comparison of sedimentary facies between the other literatures and the present study in Gwangyang Bay ; A and B were redrawn from Park et al.(1984) 59
Fig. 21. Variations of reclamation, sedimentary facies, dominant species from July 1982 to October 2005, in Gwangyang Bay. Predominant species at each sampling date were 68