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Community structure of gastropod in Bahowo mangrove ecotourism area
Handayani, M.; Rangan, J.K.; Lumingas, L.J.L.; Manginsela, F.B.; Kepel, R.C.; Ompi, M. (2021). Community structure of gastropod in Bahowo mangrove ecotourism area. Jurnal Ilmiah "PLATAX" 9(2): 281-288
In: Jurnal Ilmiah "PLATAX". Universitas Sam Ratulangi: Manado. e-ISSN 2302-3589, more

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Keyword
Author keywords
    Gastropod; Community; Mangrove; Bahowo

Authors  Top 
  • Handayani, M.
  • Rangan, J.K.
  • Lumingas, L.J.L.
  • Manginsela, F.B.
  • Kepel, R.C.
  • Ompi, M.

Abstract
    This article describes the structure of the gastropod community in the Bahowo Mangrove Ecotourism Area, Manado. From 30 sample units (squared) analyzed, obtained 185 individual gastropods belonging to 27 species with an average density of 6.17 individuals/m2. The Shannon index value (H') is quite high at 3.038, the evenness index (E) is also high at 0.922, and the dominance index (D) is low at 0.078. This variation in gastropod community structure occurs between transects. In Transect 1 there are 15 species with an average density of 7.6 individuals/m2. The most dominant species in this transect was Tectus fenestratus with a density of 1.6 individuals/m2 and a relative abundance of 21.05%. In Transect 2 there are 7 species with an average density of 2.6 individuals/m2. The most dominant species in this transect was Angaria delphinus with a density of 0.6 individuals/m2 and a relative abundance of 23.08%. On Transect 3 there are 9 species with an average density of 8.3 individuals/m2. The most dominant species in this transect was Terebralia sulcata with a density of 2.7 individuals/m2 and a relative abundance of 32.53%. Compared to the other two transects, Transect 2 had lower individual abundance and density, but also the poorest species richness. In terms of biodiversity, Transect 1 is the highest. With a composition of 15 species, Transect 1 has a higher H' index value than in Transect 2 and Transect 3. Between Transect 2 and Transect 3 there is no significant difference in the Shannon index value. The three transects showed a low dominance index value and a relatively high evenness index value.

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