The abundance and diversity of Mollusks in mangrove ecosystem at coastal area of North Sulawesi, Indonesia

Abstract

Abstract. Baderan DWK, Hamidun MS, Utina R, Rahim S, Dali R. 2019. The abundance and diversity of Mollusks in mangrove ecosystem at coastal area of North Sulawesi, Indonesia. Biodiversitas 20: 987-993. The study reported in this paper sought to analyze the abundance and diversity of Mollusks species in the coastal mangrove areas of Panango in North Sulawesi, Indonesia. Data collected in the study lent support to policy making in reducing the loss of marine biotic species in the coastal mangrove areas. Data collection used stratified-random sampling method (plot size was 10 m x 10 m) with three plots at each research station was used. Data analyzed by Odum formula for abundance, Shannon Wiener index for diversity and evenness index for evenness. The samples were collected from 2 research station covering 15 sampling sites. This research found 14 families of mollusks comprised of 11 gastropod families (21 species) and bivalve families (3 types). The highest of the relative density was found in Terebralia sp (24,24%), and the lowest relative density was obtained (1,52%) in the following species: Spondylus violaceus, Conus sp., Semiricinula turbinoides, and Faunus ater. The diversity index of mollusks species (Gastropoda and Bivalvia) at the observation station was classified as a high category, indicating by H’ >3,32 (Station I H’= 2,19 and Station II H’= 2,12). The evenness value in range 0,4<e<0,6. This indicates that the Mollusks species found in the research site had a medium amount. This study suggests a need to regulate mangrove areas of Panango for sustainable mangrove ecosystems management.

Biological Conservation of Molluscs Based on Spatial and Temporal Distribution in Tropical Tidal Lake, Medan-Indonesia

“…The results of this study showed that there were more gastropods (six species) than bivalves (three species) in this location, consistent with previous research indicating that gastropod species are more numerous than bivalves, specifically in lake and estuary areas (including mangroves) (Hartoni and Muhtadi et al 2016;Baderan et al 2019). Gastropods found in the waters play an essential role in the structure of the food chain; i.e., in the process of litter decomposition and mineralisation of organic material, especially those that are detritivores (Suwignyo et al 2005).…”

Diversity and distribution of mollusks at three zones of mangrove in Pejarakan, Bali, Indonesia

“…The abundance, biomass and diversity of mollusks in mangrove communities are most likely influenced by the physical structure of mangrove forests (including the pneumatophores and related epiphytic algae), sediment texture and mangrove detritus. In addition, studies in mangrove stands show differences in benthic biomass and diversity associated with mangrove age (Kabir et al 2014, Baderan et al 2019, Halim et al 2019, Sahidin et al 2019.…”

The neritid snails of Brunei Darussalam: their geographical, ecological and conservation significance

“…However, biogeographical comparisons between regions assume equality of sampling effort, which is rarely the case. Such discrepancies may arise from the range of local neritid habitats not being sampled in studies (Burghardt et al 2006;Frey 2010aFrey , 2010bDolorosa & Dangan-Galon 2014;Hombre et al 2016;Ng et al 2017;Baderan et al 2019). More species (not listed here) are expected in regions centrally within the Coral Triangle, noting that Brunei is at the edge of this biogeographical region.…”

“…Other neritid species 0 Abbreviations and references used are as follows: BN, Brunei Darussalam (present study); SB, Sabah, Malaysia (Manjaji-Matsumoto et al 2017;Ng et al 2017); PL, Palawan, Philippines (Dolorosa & Dangan-Galon 2014;Hombre et al 2016); HI, Haruku Island, Eastern Indonesia (Haumahu & Uneputty 2018); BY, Banyuwangi, Indonesia (Susintowati et al 2018); SR, Sarangani, Philippines (Manzo et al 2014); BK, Bunaken National Park, Sulawesi (Burghardt et al 2006); PN, Panango, South Bolaang Mongondow, North Sulawesi (Baderan et al 2019); TR, Terengganu, Malaysia (Baharuddin et al 2018(Baharuddin et al , 2019; JH, Johor, Malaysia (Cob et al 2012); SW, Sarawak, Malaysia (Hamli et al 2013;Long et al 2014); AN, Anambas and Natuna Island, Indonesia (Tan & Kastoro 2004); VN, Khanh Hoa, Vietnam (Zvonareva et al 2015;Zvonareva & Kantor 2016); TH, Gulf of Thailand (Sri-aroon et al 2005;Printrakoon et al 2008;Wells et al 2021); SG, Singapore (Tan & Clements 2008). Species recorded at less than five regions are marked in bold.…”