Community Structure of Gastropod in Seagrass Beds of Waleo Beach Waters, North Minahasa Regency
DOI:
https://doi.org/10.35800/jip.8.1.2020.28268Keywords:
Gastropod, Community Structure, WaleoAbstract
This study aims to determine the type of Gastropod and the community structure including Species Density, Relative Density, Diversity (H’), and Dominance (C). Based on observation, there is 124 individuals included in 11 species (7 genera) from 7 families (3 orders) obtained. The highest density value is 5,87 Ind/m2 by Euplica borealis, and has 35,48% of relative density. For the diversity, an index is H’ = 1,62 obtained, which is classified as low. This shows that seagrass beds in Waleo beach waters, North Minahasa Regency, there are several species obtained with abundant numbers of individuals compared to the other species, so the diversity index obtained relatively low. As for the range of dominance index is C = 0,36 to 0,44. The lowest value is in the transect number 1 while the highest in the transect number 2. This value shows that seagrass beds in Waleo beach waters, North Minahasa Regency there are no specific species that dominate in the community. Waleo beach waters, North Minahasa Regency has a temperature of about 29,3 °C illustrating the condition of the water temperature is relatively good for Gastropods' life. The salinity is 30 ‰ obtained, which is relatively good for Gastropod growth. pH obtained about 7 which is still relatively good for gastropods life.
Keywords: Gastropod, Community Structure, Waleo.
Abstrak
Penelitian ini bertujuan untuk menginventarisasi jenis-jenis Gastropoda serta mengetahui struktur komunitas termasuk: Kepadatan Spesies, Kepadatan Relatif, Keanekaragaman (H’), dan Dominansi (C). Berdasarkan hasil pengamatan diperoleh 124 individu yang termasuk dalam 11 spesies (7 genera) dari 7 famili (3 ordo). Nilai kepadatan tertinggi sebesar 5,87 Ind/m2 oleh spesies Euplica borealis, dan memiliki kepadatan relatif sebesar 35,48 %. Untuk indeks keanekaragaman diperoleh sebesar H’ = 1,62 yang tergolong rendah. Hal ini menunjukan bahwa daerah padang lamun perairan pantai Waleo, Kabupaten Minahasa Utara terdapat beberapa spesies yang diperoleh dengan jumlah individu yang melimpah dibandingkan jenis lainnya, sehingga indeks keanekaragaman yang diperoleh tergolong relatif rendah. Adapun untuk kisaran indeks dominansi yang diperoleh yaitu sebesar C = 0,36 sampai dengan 0,44. Nilai terrendah terdapat pada transek 1 sedangkan nilai tertinggi terdapat pada transek 2. Nilai tersebut menunjukan bahwa di padang lamun perairan Pantai Waleo, Kabupaten Minahasa Utara tidak terdapat jenis atau spesies tertentu yang mendominasi dalam komunitas tersebut. Wilayah perairan pantai Waleo, Kabupaten Minahasa Utara memiliki suhu 29,3 °C, menggambarkan bahwa kondisi suhu perairan tergolong baik untuk kehidupan Gastropoda. Salintas yang diperoleh sebesar 30 0/00, yang masih dalam kisaran baik untuk pertumbuhan Gastropoda. Derajat keasaman (pH) yang diperoleh yaitu 7 yang masih tergolong baik untuk kehidupan Gastropoda.
Kata Kunci : Gastropoda, Struktur Komunitas, Waleo.
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