[논문]낙동강 하구역에 서식하는 대형저서동물의 군집구조와 건강도

윤석현; 이진우; 오철웅; 최병미; 윤건탁; 나종헌; 서인수

doi:10.4217/opr.2021.43.2.073

낙동강 하구역에 서식하는 대형저서동물의 군집구조와 건강도
Community Structure and Health Status of Macrobenthic Animals in the Nakdong River Estuary, Busan, Korea 원문보기

Ocean and polar research, v.43 no.2, 2021년, pp.73 - 88

윤석현 (국립수산과학원 기후변화연구과) , 이진우 ((주)저서생물연구센터) , 오철웅 (부경대학교 수산과학대학 자원생물학과) , 최병미 ((주)저서생물연구센터) , 윤건탁 ((주)저서생물연구센터) , 나종헌 ((주)저서생물연구센터) , 서인수 ((주)저서생물연구센터)

Abstract ▼ AI-Helper

The community structure and health status of macrobenthos assemblages were investigated in the subtidal area of the Nakdong River estuary, Southern Coast of Korea. Benthic fauna samples were collected seasonally at 8 stations in the subtidal area of the Nakdong River estuary from February 2013 to October 2015. During the survey, a total of 380 species and 4,603 ind./m2 of macrobenthos in all sampling areas were collected. The major dominant species were the polychaetes Minuspio japonica, Pseudopolydora kempi, Heteromastus filifomis, Capitella capitata, the amphipod Grandidierella japonica and the bivalvia Arcuatula senhousia. Some species of polychaetes found in the study area consisted of opportunistic species that showed high densities when habitat condition was poor. On the other hand, macrobenthos assemblages in the study area were divided into brackish water and marine groups. Abundance was high in the brackish group, while the number of species and diversity index were high in the oceanic group. The three indices (AMBI, M-AMBI, and BHI) in the assessment of health levels based on the ecological characteristics and number of species in macrobenthic were commonly shown to be in good condition in the group of oceanic stations, while relatively poor conditions were reflected in the group of brackish stations. Compared to other indices, the M-AMBI index of the three indices for health assessment was considered to be a relatively more suitable one to assess benthic ecological conditions.

주제어

표/그림 (16)

그림 Fig. 1. Map of study area, including the Nakdong River Estuary, Busan, Korea
그림 Fig. 2. Faunal composition of macrobenthic assemblages in the Nakdong River Estuary, Busan, Korea
그림 Fig. 3. Spatio-temporal variations in the species number of macrobenthos in the Nakdong River Estuary, Busan, Korea (upper figure: total species number; lower one: mean species number at each station; Wi: winter, Sp: spring, Su: summer, Au: autumn)
그림 Fig. 4 . Spatio-temporal variations in the faunal abundances in the Nakdong River Estuary, Busan, Korea (upper f igure: total ind./8 m²; lower one: ind./m² at each station; Wi: winter, Sp: spring, Su: summer, Au: autumn)
그림 Fig. 5. Spatio-temporal variations in the species numbers (left) and abundances (right) at each station in the Nakdong River Estuary, Busan, Korea
표 Table 1. Top 10 dominant species ranked by their total abundance in the Nakdong River Estuary, Busan, Korea during this study period (Apol: Annelida Polychaeta, CAm: Arthropoda Crustacea Amphipoda, MBi: Mollusca Bivalvia)
그림 Fig. 6. Distribution patterns of two dominant species (Heteromastus filiformis (left) and Sternaspis scutata (right)) in the Nakdong River Estuary, Busan, Korea
그림 Fig. 7. Distribution patterns of marine species (Magelona japonica (left) and Ampelisca bocki (right)) in the Nakdong River Estuary, Busan, Korea
그림 Fig. 8. Distribution patterns of blackish species (Minuspio japonica (a), Pseudopolydora kempi (b), Capitella capitata (c), Grandidierella japonica (d) and Arcuatula senhousia (e)) in the Nakdong River Estuary, Busan, Korea
그림 Fig. 9. Spatio-temporal variations of diversity (left) and evenness (right) in the Nakdong River Estuary, Busan, Korea
그림 Fig. 10. Dendrogram from the cluster analysis based on the abundance data in the Nakdong River Estuary, Busan, Korea
그림 Fig. 11. The ecological quality status assessed by the AMBI at each station in the Nakdong River Estuary, Busan, Korea (◆: Undisturbed, ■: Slightly disturbed, ●: Moderately disturbed)
표 Table 2. Ecological characteristics of each station group determined by cluster analysis in the Nakdong River Estuary, Busan, Korea
그림 Fig. 12. The ecological quality status assessed by the MAMBI at each station in the Nakdong River Estuary, Busan, Korea (◆: high, ■: good, ●: moderate, ▲: poor)
그림 Fig. 13. The ecological quality status assessed by the BHI at each s tation in the Nakdong River Estuary, Busan, Korea (◆: level 1, ■: level 2, ●: level 3)
표 Table 3. Sampling area, species numbers and abundances of the present and previous studies in the Nakdong River Estuary, Busan, Korea (Whittaker's d is also presented for the comparison of relative species diversity)

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