Diversity and abundance of terrestrial Gastropods on the slopes of Mount Arjuna-Welirang, East Java, Indonesia

Abstract

Abstract. Nurhayati PA, Affandi M, Nurinsiyah AS. 2021. Diversity and abundance of terrestrial Gastropods on the slopes of Mount Arjuna-Welirang, East Java, Indonesia. Biodiversitas 22: 4193-4202. Before this study, the latest list of land snail species from Mt. Arjuna-Welirang was published in 1952. The current study aims to update the list of terrestrial Gastropods in the area, focusing on Sumber Brantas Arboretum and Raden Soerjo Forest Park Conservation Area (Tahura), East Java, Indonesia. Live snails and dead shells were collected from 24 10 × 10 m2 sampling plots to determine species richness, composition, and abundance. Sampling was carried out by combining visual observation (direct collection) and sorting-sieving soil-leaf litter samples. Total 646 specimens belonging to eight families and 13 species were collected, all new records to the area. Thus, the number of species known from Mt. Arjuna-Welirang was increased to 16 species from nine families. The diversity index of the Mt. Arjuna-Welirang slope was 1.1, and the dominance index was 0.54. The Tahura had a higher diversity index than the Arboretum, at 2.0 and 0.38, respectively, but the dominance index for Tahura was lower (0.18 and 0.85, respectively). This was due to the dominance of Bradybaena similaris, an invasive species in the latter area. Less canopy cover and more human activity in the Arboretum are factors that might cause this discrepancy. Many land snail species are sensitive to desiccation and habitat disturbance. Therefore, minimizing habitat changes and human activities is necessary to maintain or increase native land snail species diversity.

Community distribution and utilization of gastropods in the Coastal Area of Liki Island, Sarmi District, Papua, Indonesia

“…Various types of environments in the coastal area of Liki Island provide suitable conditions and habitat types for many species of gastropods. Gastropod habitats are generally in the littoral zone, including tidal areas (Nurhayati et al 2021), where they can attach to seagrass and mangroves' roots, stems, and leaves (Rahman et al 2021). Most gastropods are also immersed in sandy mud substrates (Dharma 1988;Bula et al 2017;Saleky et al 2019).…”

Morphometric differentiation of Landouria smimensis along altitudinal gradient

“…In Java, there are at least 263 species of terrestrial gastropods among which 104 species are endemic to the island [5]. Mountains in Java harbor a high species diversity of land snails and endemicity [6][7][8][9]. Mt.…”

The Mangrove Density, Diversity, and Environmental Factors as Important Variables to Support the Conservation Program of Essential Ecosystem Area in Muara Kali Ijo, Pantai Ayah, Kebumen

“…The EEA in Muara Kali Ijo aims to support the conservation of the mangrove ecosystem as an essential ecosystem in Pantai Ayah, Kebumen, because the mangrove ecosystem has a specific affinity (Hilmi et al 2021e), specific environment (Hilmi et al 2021a(Hilmi et al , 2022bXiong et al 2018), specific habitat (Hilmi 2018;Hilmi et al 2021d;Purnama et al 2022), and specific ecosystem (Cochard 2017;Hilmi et al 2015;Lapolo et al 2018). In addition, the mangrove ecosystem in Muara Kali Ijo also has specific functions to reduce and protect tidal flooding (Hilmi et al 2022a;Marois and Mitsch 2017) and permanent water inundation (Bomer et al 2020), decreasing of coastal disasters (Cooray et al 2021;Nur and Hilmi 2021), decreasing of heavy-metal pollution (Chen et al 2021;Hilmi et al 2017b;Syakti et al 2013;Xin et al 2014;Zhang et al 2019), support carbon conservation (Hilmi 2017a), and support feeding, nursery dan spawning activity (Jones et al 2015;Lapolo et al 2018;Nurhayati et al 2021;Reis et al 2021). Besides, the mangrove ecosystem in Muara Kali Ijo is also used as a tourism area and Crocodylus porosus preservation (Tim Penyusun EEA Kali Ijo Kebumen 2020).…”