제주도 남부 사계리 연안 저서무척추동물 출현양상 및 군집구조 특성 (2016-2023)
Occurrence Patterns and Community Structure of Macrobenthic Invertebrates in the Coastal Waters of Sagye-ri, Jeju Island, Korea from 2016 to 2023
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Here, we aimed to determine and compare the community structures of macrobenthic invertebrates in the coastal waters of Sagye-ri in the southern part of Jeju Island from 2016 to 2023. In total, 461 species were identified in this study. Mollusks comprised 238 species (51.6%), arthropods 68 (14.8%), Poriferans 45 (9.8%), Echinodermata 31 (6.7%), Bryozoans 24 (5.2%), Annelida 24 (5.2%), and others, including Cnidarians 19 (4.1%). The density and biomass were estimated to be 188 ind./m2 and 1,017.4 gwwt/m2, respectively. Gastropoda was the most dominant taxon in terms of abundance (87 ind./m2) and number of species. Meanwhile, Gastropoda was predominant in biomass (321.7 gwwt/m2). The dominant species of Gastropoda, Crustacea, Ascidiacea and Stelleroidea were Bittium alutaceum, Perampithoë sp., Herdmania monus, Bittium variegatum, Ophiomastix mixta Lütken, and Bittium glareosum at 5–20 m. Based on cluster analysis, the study area was divided into two groups. The annual biodiversity, evenness, and richness index appeared as follows: H'=3.381-4.458, E'=0.672-0.838, R=16.706-25.021. The dominance index was the highest in 2017 and lowest in 2019.
Abstract
Here, we aimed to determine and compare the community structures of macrobenthic invertebrates in the coastal waters of Sagye-ri in the southern part of Jeju Island from 2016 to 2023. In total, 461 species were identified in this study. Mollusks comprised 238 species (51.6%), arthropods 68 (14.8%), Poriferans 45 (9.8%), Echinodermata 31 (6.7%), Bryozoans 24 (5.2%), Annelida 24 (5.2%), and others, including Cnidarians 19 (4.1%). The density and biomass were estimated to be 188 ind./m2 and 1,017.4 gwwt/m2, respectively. Gastropoda was the most dominant taxon in terms of abundance (87 ind./m2) and number of species. Meanwhile, Gastropoda was predominant in biomass (321.7 gwwt/m2). The dominant species of Gastropoda, Crustacea, Ascidiacea and Stelleroidea were Bittium alutaceum, Perampithoë sp., Herdmania monus, Bittium variegatum, Ophiomastix mixta Lütken, and Bittium glareosum at 5–20 m. Based on cluster analysis, the study area was divided into two groups. The annual biodiversity, evenness, and richness index appeared as follows: H'=3.381-4.458, E'=0.672-0.838, R=16.706-25.021. The dominance index was the highest in 2017 and lowest in 2019.