[논문]보령 학성리 갯벌 조간대 대형저서동물 군집구조 분석

양동우; 이정호; 김하련; 배한나; 박진순; 김혜선

doi:10.7850/jkso.2021.26.3.167

보령 학성리 갯벌 조간대 대형저서동물 군집구조 분석
Analysis of Macrobenthic Community Structure in an Intertidal Flat in Hakseong-ri, Boryeong, Korea 원문보기

바다 : 한국해양학회지 = The sea : the journal of the Korean society of oceanography, v.26 no.3, 2021년, pp.167 - 182

양동우 (국립해양생물자원관 생태보전실) , 이정호 (안양대학교 해양바이오시스템공학과) , 김하련 (한국해양과학기술원 동해연구소) , 배한나 (서울대학교 지구환경과학부 및 해양연구소) , 박진순 (한국해양대학교 해양환경학과 및 해양과학기술전문대학원 해양과학기술융합과) , 김혜선 (국립해양생물자원관 생태보전실)

초록
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본 연구는 충남 보령 학성리 갯벌 조간대에서 대형저서동물의 시·공간적 분포 및 군집구조를 파악하고, 환경요인에 따른 군집구조 변동을 알아보고자 하였다. 현장조사는 2016년-2017년에 계절별로 9개 정점에서 캔코어(13 cm × 22 cm × 30 cm)를 이용하여 각 정점마다 3회 반복 채취 수행하였다. 퇴적환경은 전반적으로 니질 함량이 60% 이상이었으며, 유기물 함량은 평균 2.3%이었다. 대형 저서동물은 총 79종이 출현하였고, 평균서식밀도는 611 ind./m², 평균생물량은 64.1 gWWt/m²이었다. 상위 우점종은 니질 갯벌에 서식하는 고리버들갯지렁이(Heteromastus filiformis), 칠게(Macrophthalmus japonicus)와 쏙(Upogebia major)이며, 서식밀도는 각각 297 ind./m²(48.6%), 62 ind./m²(10.1%), 42 ind./m²(6.9%)으로 나타났다. 집괴분석으로 분류된 3개의 정점군은 물리·화학적인 환경요인 보다는 생물상호 작용과 우점종 출현비율 등으로 구분되었으며, nMDS 분석으로 살펴본 대형저서동물 군집은 계절적 변동양상을 보였다.

Abstract ▼ AI-Helper

This study was carried out to investigate temporal and spatial distribution of macrobenthic community and elucidate effects of environmental factors on change of community structure in an intertidal flat, Hakseong-ri, Boryeong, Korea. Field surveys were seasonally conducted to collect samples of sediment and macrobenthos using can core in triplicate at nine stations in 2016 and 2017. Our results showed that sediment had high mud content (above 60%) in most samples and mean content of loss on ignition was 2.3% in 2016. A total of 79 species was collected in the study site during the study period. Mean density and biomass were 611 ind./m2 and 64.1 gWWt/m2, respectively. Heteromastus filiformis was the dominant species (48.6%, 297 ind./m2) followed by Macrophthalmus japonicus (10.1%, 62 ind./m2) and Upogebia major (6.9%, 42 ind./m2). Three assembly groups resulted from cluster analysis were more distinguished by interaction between organisms and frequency of dominant species than by physical and chemical environment characteristics. In addition, macrobenthic community in the Hakseong intertidal flat showed seasonal changes based on non metric multidimensional scaling using species abundance.

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표/그림 (13)

그림 Fig. 1. Location of sampling stations at the study site in an intertidal mudflat in Hakseong-ri, Boryeong, western coast of Korea.
그림 Fig. 2. Mud content (%) and loss on ignition (LOI, %) at each station, tide level and transect line in the Hakseong intertidal flat. Closed circles indicate mean with standard deviation.
표 Table 1. Seasonal variation of a number of species, mean density and mean biomass by taxonomic groups in the Hakseong intertidal flat in 2016 and 2017
그림 Fig. 3. The number of species, density and biomass at each station in the Hakseong intertidal flat in 2016 and 2017.
표 Table 2. Mean density, percentage of total individuals and frequency of dominant macrobenthic species in the Hakseong intertidal flat during the study period. Frequency means a number of stations where species occurred among all of 72 sampling stations
그림 Fig. 4. Mean density of dominant species at each station, tide level and transect line in the Hakseong intertidal flat in 2016 and 2017.
그림 Fig. 5. Dendrogram of cluster analysis comparing the species composition of macrobenthic communities in the Hakseong intertidal flat in 2016 and 2017.
그림 Fig. 6. Seasonal distribution of three species assembly groups based on results of cluster analysis in the Hakseong intertidal flat in 2016 and 2017.
표 Table 3. Comparisons of ecological characteristics among three species assembly groups based on results of cluster analysis. mean ± standard deviation. The numbers in parentheses indicate percentages of the species composition
그림 Fig. 7. Score and loading plots of principal component analysis (PCA) based on environmental and ecological factors of species assembly groups.
표 Table 4. Results of SIMPER analysis for species assembly groups of macrobethos in the Hakseong intertidal flat during the study period
그림 Fig. 8. Non-metric multidimensional scaling (NMDS) plot of macrobenthos community composition at 9 stations in Hakseong, 2016 (A) and 2017 (B). Symbols indicate sampling times.
표 Table 5. Results of ANOSIM and pair-wise tests of the macrobenthos community composition among collected seasons in the Hakseong inertidal flat, 2016 and 2017

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