진도군 주요 무인도서 암반 조간대의 해안무척추동물 종목록 = Species Inventory of Marine Benthic Invertebrates on the Rocky Intertidal Area of Uninhabited Islands around Jindo Island, Southwest Coast of Korea

다국어 초록 (Multilingual Abstract)

In August 2019, we have conducted qualitative samplings at low tide in exposed intertidal zones and tide pools of 14 uninhabited islands around Jindo Island, located on the southwest coast of Korea. The main purpose of the survey was to make a species inventory of the organisms that inhabited the study area. In addition, the dominant species with high density in the area were also examined through quantitative survey. Rocky substrate and tidal pools were developed in all uninhabited islands. Taponies and cracks on the surface of substrate were also deveploped, which provided living habitats for marine benthic invertebrates. A total of 52 species were collected, consisting of six phyla, 11 classes, 18 orders, 34 families and 52 species, and the molluscs were the most dominant faunal group among them, with 32 species (61.5%), 3 classes, 8 orders and 16 families. The arthropods formed the second dominant faunal group, amounting to 9 species (17.3%), 2 classes, 3 orders and 9 families. In addition, Porifera, Cnidaria, Bryozoa and Echinodermata in the area numbered between one and three species, respectively. The greatest number of species were found on Dureukdo island, with 27 species that included 20 species of molluscs, and seven other islands such as Donseo island featured more than 20 species. The rest of the remaining uninhabited islands featured more than 10 species, with those found on Shineudo island being the lowest in number (14 species). The ones that were found in all the sampling areas were Reishia clavigera and Ligia exotica. In addition, Echinolittorina radiata was found to be the dominant species in 10 areas including Sososongdo island. The dominant species found in other areas were as follows: Tetraclita japonica in 9 islands including Haesuyeo(Gochiyeodo) island, Pollicipes mitella in 8 islands including Judo island, Mytilisepta virgata in 5 islands including Donseo island, Lottia dorsuosa in 3 islands including Bukdo(Siruseum) island, Littoraria brevicula in 2 islands including Shineudo island, Nerita japonica in Donseo island, Cellana grata in Shindo island, and Omphalius rusticus in Judo islands. Comparative analysis of marine invertebrates on the rocky intertidal area between the study area and adjacent southwest coastal area showed that the two areas featured similar type of dominant species, zonal distribution pattern, and total number of species. However, type of dominant species and total number of species were found to be slightly different in Shinan and Wando areas due to sampling methods and sediment environment. These results indicated that the dominant species and distribution pattern of macroinvertebrate in rocky area of Jindo uninhabited island were similar to those of other islands in southwest coast of Korea, that can be useful in establishing management policies for uninhabited islands regarding the monitoring of changes in the coastal marine ecosystem and environment.

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