Community Structure and Macrobenthos Diversity in the Coastal Waters of Tasik Ria, Mokupa Village, North Sulawesi
Kata Kunci:
Community structure, diversity, macrobenthos, tasik riaAbstrak
Benthic organisms belong to a group of aquatic ecosystems that have a role as key organisms in the food web. Macrobenthos are aquatic bottom organisms that are 1 mm in size. Macrobenthos community structure can be known based on its composition, abundance, diversity, and distribution. This study aims to determine the community structure of macrobenthos in Tasik Ria waters. The method used in this research is Survey method with purposive sampling technique. Sampling was conducted at 2 stations using 50 cm x 50 cm plots. Macrobenthos sampling was conducted in the water using a 8x2 inch sieve and selecting locations with different substrates, namely rocky and seagrass beds. The results showed that macrobenthos found in Tasik Ria Beach consisted of 74 species, 26 orders, 14 classes and 615 individuals. The value of Shannon-Wiener diversity index (H') in Tasik Ria Beach was 3.30 which indicated high diversity. The species richness index of Station 1 (11.81) Station 2 (14.81) is high in both stations, as well as the evenness index of Station 1 (0.71) and Station 2 (0.76) and uniformity of Station1 (0.71) and Station 2 (0.76) which shows the distribution of individuals between species is quite even. Low dominance index values indicate the absence of dominating species. The species Cymodocea rotundata Ascherson & Schweinfurth, 1870 has the highest importance value, indicating its ecological dominance in the study area. This study proves that the ecosystem conditions in Tasik Ria Waters support diverse and balanced macrobenthos life.
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