[논문]보령 갯벌의 인위적 영향 및 생물학적 요인에 따른 대형저서동물 군집 변화

전승렬; 옹기호; 이지호; 정윤아; 구준호; 오광석; 박종우

doi:10.7850/jkso.2023.28.4.143

보령 갯벌의 인위적 영향 및 생물학적 요인에 따른 대형저서동물 군집 변화
Changes in Macrobenthic Community Depending on the Anthropogenic Impact and Biological Factors of Boryeong Tidal Flat, Korea 원문보기

바다 : 한국해양학회지 = The sea : the journal of the Korean society of oceanography, v.28 no.4, 2023년, pp.143 - 157

전승렬 (국립수산과학원 갯벌연구센터) , 옹기호 (제주대학교 해양생명과학과) , 이지호 (국립수산과학원 갯벌연구센터) , 정윤아 (국립수산과학원 갯벌연구센터) , 구준호 (국립수산과학원 갯벌연구센터) , 오광석 (해온부유생태연구소) , 박종우 (국립수산과학원 갯벌연구센터)

초록
AI-Helper

본 연구는 바지락과 쏙의 서식 구역이 대비되는 보령 주교 갯벌의 인위적인 환경 영향에 의한 저서동물 군집 특성을 확인하였다. 조사 기간 내 대형저서동물은 총 55종이 출현하였으며, 평균 서식밀도는 338 ind./m², 생체량은 212.2 gWWt/m²이었다. 출현 종수는 상부(27종)에서 하부(37종)로 갈수록 증가하였고, 우점종은(상부: 둥근가시사자머리참갯지렁이, 중부: 고리버들갯지렁이, 하부: 바지락) 조위별로 다르게 나타났다. 집괴분석과 다차원척도법을 이용한 상위 10종의 저서동물 군집구조는 하부의 바지락 어장과 쏙 서식공 밀도가 높은 중부 정점 중심의 두 그룹으로 나뉘며, 특정 생물 종의 영향을 반영하였다. 쏙 서식 공간의 퇴적물 입도 조성은 변동 폭이 컸으나 연간 유지되었으며, 분급은 2.1 𝜑로 낮아져 같은 입자로 구성된 비율이 증가하였다. 특히, 중부는 인위적인 영향이 높음에도 고리버들갯지렁이가 우점하고, 쏙 서식공 밀도와의 연관성을 보여 이는 종간 상호작용에 기인하는 것으로 판단된다.

Abstract ▼ AI-Helper

This study confirmed the characteristics of macrobenthic community due to anthropogenic environmental changes in the Boryeong Jugyo tidal flat, where the habitat of manila clam (Ruditapes philippinarum) and mud shrimp (Upogebia major) is separated. The total number of occurring species was 55 during the study period with an average habitat density of 338 ind./m2 and a biomass of 212.2 gWWt/m2. The number of occuring species increased from 27 species at the upper flat to 37 species at the lower flat, and the dominant species differed by tide levels (Upper: Leonnates persica, Middle: Heteromastus filiformis, Lower: R. philippinarum). The macro-benthic community sturctures of the top 10 species using cluster analysis and nMDS were divided into two groups, focusing on Manila clam culture farm of lower flats and middle flats with high habitat density, reflecting the influence of specific species. The sediment composition of the U. major habitat space fluctuated highly, but it was maintained annually, and the sorting coefficient was 2.1 𝜑, and the proportion of the same particle size was increased. In particular, because the middle flat has a dense anthropogenic impact, a dominant species, H. filiformis dominated and revealed a relationship with the density of burrow holes of U. major, which is considered to be a biological interaction between these two macrofauna in this tidal flat.

주제어

표/그림 (11)

그림 Fig. 1. A map of study area and showing the locations of sampling sites (circle symbols) in Boryeong Jugyo tidal flat on the west coast of Korea.
표 Table 1. Seasonal change of sediment properties by tide levels in Boryeong Jugyo tidal flat
표 Table 2. The Species number and dominant species (proportion, %) by taxa according to tide levels in the Boyeong Jugyo tidal flat
그림 Fig. 2. (a) Composition of abundance on benthic macrofauna by tide levels of study area. (b) Comparison of diversity (Shannon-Weaver diversity index, left Y-axis) and dominance (Simpson dominance index, right Y-axis) indices for a benthic macrofauna given by sites and tide levels.
그림 Fig. 3. Bar chart of mean density of benthic macrofauna in 2020 and 2021: (a) Heteromastus filiformis, (b) Ruditapes philippinarum, (c) Leonnates persica, and (d) Upogebia major. Mud shrimp population is estimated from burrow hole density (D'Andrea and DeWitt, 2009).
그림 Fig. 4. Contour maps showing a burrow hole density of mud shrimp (Upogebia major) in Boyeong Jugyo tidal flat. (a) Mud shrimp burrow hole density in 2012 and bottom plow work point in 2019 (blue inverted triangle symbols), (b) Mud shrimp burrow hole density in 2020 and extending habitats of mud shrimp in compared to 2012 (red thatch pattern).
표 Table 3. List of benthic macrofauna species occurred in the Boryeong Jugyo tidal flat during study period
그림 Fig. 5. Dendrogram of cluster analysis and non-metric multidimensional scaling (nMDS) based on top 10 rank abundance of benthic macrofauna by sites showing the difference pattern between non- and shellfish farm according to the Bray-Curtis similarity method (square-root-transformed data and 25% of similarity). Dotted line in the cluster means that it is divided into two groups by SIMPROF test. Vectors indicate that species with the highest contribution within each group by SIMPER analysis. Results for SIMPER analysis can be found in Table 4.
표 Table 4. Species that contribute to similarity within each group in macrobenthic communities, as revealed by the SIMPER analysis
그림 Fig. 6. Comparison of sediment composition (left Y-axis) and sorting coefficient (right Y-axis) between the two sites (Line B) where mud shrimp (BB-2) and manila clam (BB-3) habitat on the border within the clam aquaculture farm license area.
그림 Fig. 7. Correlation between the density and biomass of a polychaete species, Heteromastus filiformis and the burrow hole density of a mud shrimp, Upogebia major.

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