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The inventory process is the first method to protect and safeguard animal biodiversity. This study carries out a quantitative and qualitative inventory of terrestrial gastropods at three sites in Skikda province (north-eastern Algeria). The relationship between terrestrial gastropod diversity and soil physicochemical factors was investig...
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... In recent years, there has been significant progress in the study of terrestrial malacology in Algeria (DAMERDJI, 2009(DAMERDJI, , 2018DAMERDJI & CHEKROUNI, 2015 ;BOUAZIZ-YAHIATENE & MEDJDOUB-BENSAAD, 2016 ;AMEUR et al., 2019 ;BELHIOUANI et al., 2019 ;CHERITI et al., 2021 ;RAMDINI et al., 2021aRAMDINI et al., , 2021bZAIDI et al., 2021 ;SADOUK et al., 2023). However, in the Souk Ahras region of Northeastern Algeria, no research has been conducted on the diversity of terrestrial gastropods. ...
The current study is a qualitative inventory as it aims at assessing the diversity of terrestrial gastropods in the Souk Ahras region of Eastern Algeria, and to help update our knowledge of the distribution of terrestrial gastropod species in Algeria. The research sample was carried out at four sampling stations using hand sampling. The researcher came up with that a species richness of nine snail and slug species belonging to four different families. The Helicidae family is the most represented, with six species: Cornu aspersum, Cantareus koraegaelius, Helix melanostoma, Eobania vermiculata, Eobania constantina and Theba pisana. The other families are less rich in species. Résumé-Cette étude, qui constitue un inventaire qualitatif, vise à évaluer la diversité des gastéropodes terrestres dans la région de Souk Ahras, dans l'est de l'Algérie, et à actualiser nos connaissances sur la répartition de ces espèces en Algérie. L'échantillonnage a été réalisé à la main dans quatre stations d'échantillonnage. Les chercheurs ont identifié une richesse spécifique de neuf espèces d'escargots et de limaces appartenant à quatre familles différentes. La famille des Helicidae est la plus représentée, avec six espèces : Cornu aspersum, Cantareus koraegaelius, Helix melanostoma, Eobania vermiculata, Eobania constantina et Theba pisana. Les autres familles sont moins riches en espèces.
... At 1000 m, the soil temperature and light intensity are lower, and soil moisture is higher compared to the 800 m and 900 m locations, as shown in Table 3. The higher moisture is crucial for terrestrial gastropods, as they depend on a humid environment to prevent dehydration, maintain metabolic activity, and enhance mobility (Nunes and Santos, 2012;Dos Santos et al., 2021;Zaidi et al., 2021). Additionally, at an altitude of 1000 m asl, the lower sunlight intensity caused by more frequent clouds or fog creates a cooler and shadier microenvironment, which is highly favored by gastropods. ...
Terrestrial gastropods are a group of soil biota that function as herbivores, detritivores, and predators, with their presence contributing to the balance of soil ecosystems, including agroecosystems. This study aims to analyze the community structure of terrestrial gastropods based on elevation at the Kabawetan Tea Plantation, Kepahiang Regency, Bengkulu Province. Observation stations were determined using the stratified sampling method, consisting of locations at elevations of 800, 900, and 1000 meters above sea level (m asl). Sample collection was conducted using the horizontal line transect method along a 100-meter transect at each research location, with 20 plots of 50 cm × 50 cm along each transect, spaced 5 m apart. The spesies of terrestrial gastropods in the Kabawetan Tea Plantation comprised four species belonging to four families: Achatinidae (Achatina fulica), Subulinidae (Allopeas gracile), Camaenidae (Bradybaena sp.), and Ariophantidae (Parmarion martensi). Based on elevation, different species of terrestrial gastropods were found; at elevations of 800 and 900 m asl, two common species were identified, namely Achatina fulica and Bradybaena sp., while at 1000 m asl, three species were found, namely: Allopeas gracile, Bradybaena sp., and Parmarion martensi. The highest density of terrestrial gastropods wasrecorded at 1000 m asl. The species Bradybaena sp. consistently exhibited the highest abundance across all three research locations. The diversity of terrestrial gastropods at the three elevation strata in the Kabawetan Tea Plantation was classified as low (H′ < 1), and their distribution followed a cluster pattern.
... Terrestrial snails are classified into two major groups: the Eupulmonata and the Caenogastropoda, which include the majority of prosobranch species (Sosa et al. 2014;Bouchet et al. 2017). Terrestrial snails are involved in a variety of ecosystem processes, including pollination, nutrient recycling, decomposing detritus and plant material, calcium enrichment in calcium-deficient habitats, soil generation, and providing food for other species (Astor et al. 2015;Zaidi et al. 2021). Additionally, they are good bioindicators due to their sensitivity to environmental variables and typically restricted capacity to disperse (Nurinsiyah et al. 2016;Hodges and McKinney 2018). ...
Tañan VB, Sumaya NHN. 2024. Bio-inventory of terrestrial gastropod species in Northern Mindanao, Philippines. Biodiversitas 25: 3391-3402. Gastropods are the largest class in the phylum Mollusca, with an estimated 70,000 to 76,000 species. The prevalence of gastropods is undeniable evidence of their successful adaptation to various habitats, including terrestrial, freshwater, and marine environments. Slugs and snails are extremely effective in the terrestrial environment, where they are involved with several ecological activities such as nutrient recycling, decomposing waste material, and calcium enrichment in calcium-deficient habitats. However, many species (notably the non-indigenous ones) are well-known pests that damage crops, increase pesticide demand, harm natural ecosystems, reduce native biodiversity, and even carry pathogens and parasites. Northern Mindanao is one of the regions in Mindanao, Philippines, with abundant agricultural resources. In comparison to other taxa in Mindanao, gastropod species have received less attention from researchers. Thus, we collected, characterized, and delineated species of gastropods from the different agricultural areas in Northern Mindanao, Philippines. During sampling, environmental parameters were recorded, and it was established which gastropod species are associated with crops and, at their worst, can become pests to banana (Musa acuminata Colla), corn (Zea mays L.), cabbage (Brassica oleracea L.), carrots (Daucus carota L.), rice (Oryza sativa L.), eggplant (Solanum melongena L.), chayote (Sechium edule (Jacq.) Sw.), radish (Raphanus sativus L.), and many more. Morphology and morphometrics following published protocols on the collected organisms successfully characterized the gastropod species. Slug species, namely, Laevicaulis alte (Férussac, 1822), Sarasinula plebeia (P.Fischer, 1868), and Deroceras (Deroceras) laeve (O.F.Müller, 1774) and snail species, Lissachatina fulica (Férussac, 1821), Pomacea canaliculata (Lamarck, 1822), Subulina octona (Bruguière, 1789), Oxychilus (Ortizius) alliarius (J.S.Miller, 1822), and Bradybaena similaris (A.Férussac, 1822), were identified. The study reveals that exotic terrestrial gastropods are prevalent in the agricultural areas across Northern Mindanao. Consequently, additional surveys are necessary to determine the extent of their dispersal, crop preferences, pest status, and to its associated parasites within the Philippines.
... Several studies on land snail inventories have been carried out in several biotopes of Algeria, notably in the northwestern (Damerdji, 2008(Damerdji, , 2013, and northeastern regions (Larbaa and Soltani, 2013;Douafer and Soltani, 2014;Belhiouani et al., 2019 andZaidi et al. 2021). Recently, a survey of gastropods was conducted in many areas of northeastern, western Algeria (Bouchiba et al., 2021). ...
Understanding both the genetic diversity and geographical distribution of animal genetic resources is essential for their sustainable utilization, improvement, and conservation. Land snails that have adapted to arid conditions confront imminent threats such as habitat loss stemming from urbanization, agriculture, pollution, and the ever-growing impacts of environmental and climate change. The present study was undertaken to explore the current morphological variability within the land snail's population in Algeria. From November 2022 to June 2023, 4 quantitative body measurements (shell size and live weight) and 2 qualitative traits (shell and flesh color) were recorded on 211 adult land snails from the 4 geographic provinces that comprise different climate zones of Algeria. The collected data were first analyzed using multiple comparisons of least-square means (LSmeans), followed by generalized linear model (GLM) procedures, to explore the relationships among the measured morphometric traits and the 4 geographic zones. Univariate analyses indicated that all quantitative linear body measurements varied significantly (P < 0.05) across the phytogeographical zones. The covariance analysis using the sampling month to illustrate the heat stress effect shows a significant difference of body weight among land snails' population from 4 regions. In addition, multivariate analysis shows that individuals from Ain Temouchent province are distinguished by their small shell size and low weight. These results need to be investigated further to clarify this biodiversity among land snails and their environmental adaptation.
... Recent research suggests that snails excrete approximately 10% of their body weight in waste matter daily and that their excrement contains an amount of organic matter (11.75%) [32]. The sustained buildup of apple snail waste enriches soil horizons and increases the soil SOM [56]. This finding aligns with the work of Jong-Song et al. [9], who highlighted the beneficial impact of apple snails on reclaimed sodic soil with low salt concentrations over six years. ...
Recent studies have indicated that the invasive apple snail (Pomacea canaliculata) exhibits tolerance to the salinity levels present in coastal agricultural soils, suggesting that apple snails could potentially invade salt-affected coastal agricultural areas. However, the effects of the alien snail Pomacea canaliculata invasion on coastal saline soils, such as in terms of soil properties, microbial diversity, and abundance, remain poorly understood. To fill this gap, we conducted experiments involving three salinity levels (0, 2‰, and 5‰, w/w), coupled with varying snail densities (0, 5, and 10 snails per box), applied to agricultural soil. We analyzed soil chemical properties, enzyme activities, and bacterial communities. The findings revealed that heightened soil salinity increased soil electrical conductivity (EC) (exceeding 1312.67 μS cm⁻¹). Under saline conditions, snail treatments significantly increased the soil organic matter (SOM) content from 15.82 mg kg⁻¹ to 18.69 mg kg⁻¹, and concurrently diminished the dissolved organic carbon (DOC) from 47.45 mg kg⁻¹ to 34.60 mg kg⁻¹. Both snail and salinity treatments resulted in ammonia nitrogen (NH4⁺-N) accumulation, while nitrate nitrogen (NO3⁻-N) concentrations remained low in salt-affected soils. A notable positive correlation existed between the EC and the activities of hydroxylamine reductase (HR) and peroxidase (POD), where HR exhibited a positive correlation with NH4⁺-N, and POD displayed a negative correlation with NO3⁻-N. Salinity substantially decreased the diversity and altered the composition of soil bacterial community, with the phyla Bacteroidota, Proteobacteria, and Firmicutes adapting to salt-affected soil environment and proliferating. Structural equation modeling (SEM) analysis indicated that snails exerted a direct influence on soil-available nitrogen (including NO3⁻-N and NH4⁺-N), while salinity impacted available nitrogen by modulating soil enzyme activities and bacterial communities. Our findings provide insights into how soil responds to the concurrent impacts of snail invasion and soil salinization, establishing some references for future research.
... spesies gastropoda teridentifikasi di seluruh dunia. Kelas ini memiliki cakupan distribusi yang luas, baik di perairan darat (Belhiouani et al., 2019;Zaidi et al., 2021), maupun perairan laut (Baharuddin et al., 2018;Haumahu dan Uneputty, 2022). Gastropoda juga dapat ditemukan di ekosistem mangrove (Pietersz et al., 2022), baik yang bersifat epifauna, infauna, maupun treefauna. ...
Mangrove forests in Desa Bakau, Sambas Regency, West Kalimantan play an important role as a habitat for various types of aquatic biota, one of them being gastropods. Gastropods are reported to have a wide distribution in both inland and marine waters. Local people catch them for sale and consumption. An inventory of gastropod species in the mangrove area of Desa Bakau can provide initial information regarding the diversity of existing species. This data can be used as a database for sustainable management and utilization of natural resources. The purpose of this study was to identify the species of gastropods in the mangrove of Desa Bakau, Sambas Regency, West Kalimantan. This study used the exploratory method of collecting gastropods at the observation station. The results found 5 types of gastropods in Desa Bakau, such as Cassidula, Ellobium, Cerithidea, Littoraria, and Pirenella. Keywords: gastropods, mangrove, mollusk, Sambas Abstrak Hutan mangrove di Desa Bakau, Kabupaten Sambas, Kalimantan Barat berperan penting sebagai tempat berbagai jenis biota perairan, salah satunya yaitu gastropoda. Gastropoda dilaporkan memiliki distribusi luas baik di perairan darat maupun laut. Masyarakat setempat melakukan penangkapan untuk dijual dan dikonsumsi. Inventarisasi jenis gastropoda yang ada di area mangrove Desa Bakau dapat menjadi informasi awal mengenai keanekaragaman jenis yang ada. Data tersebut dapat digunakan sebagai database dalam pengelolaan berkelanjutan serta pemanfaatan sumberdaya alam yang ada. Tujuan penelitian ini adalah mengidentifikasi jenis gastropoda di area mangrove Desa Bakau, Kabupaten Sambas, Kalimantan Barat. Penelitian ini menggunakan metode eksplorasi dengan mengambil gastropoda yang ada di stasiun pengamatan. Hasil penelitian ditemukan 5 jenis gastropoda mangrove di Desa Bakau, yaitu Cassidula, Ellobium, Cerithidea, Littoraria, dan Pirenella. Kata kunci: gastropoda, mangrove, moluska, Sambas
... Limestone habitats are seriously threatened by a range of human activities, including mining and quarrying, which have led to the loss of some terrestrial mollusk species, as these limestone habitats are an important reservoir for the regional malacofauna (Fontaine et al., 2007;Osiele et al., 2022;Rehman et al., 2021). Terrestrial mollusks show a positive correlation in terms of abundance and species richness with calcium levels available in forest environments (Zaidi et al., 2021). However, snail abundance may be somewhat reduced with higher levels of environmental calcium (León et al., 2022). ...
... In several studies in our country and abroad, the fauna of terrestrial and aquatic gastropod molluscs in certain regions has been studied in detail. Nedjoua et al. (2021) determined the variation of the diversity of gastropod molluscs in North-East Algeria depending on the composition of the external environment and soil factors. They showed that eight species belonging to 4 families are distributed in this area. ...
Kudratov J, Pazilov A, Maxammadiyev Z, Urazova R, Otakulov B, Bazarov B, Keldiyarov K, Soatova Z, Urinova X. 2023. Diversity and ecology of molluscs (Gastropods) in mountain streams, Nurota mountain range, Uzbekistan. Biodiversitas 24: 2402-2408. Characterization of the faunal biodiversity of the regions is one of the important tasks in today's era when the influence of the anthropogenic factor has increased, and the natural ecosystems are undergoing drastic changes. Therefore, the faunal composition analysis of molluscs as a part of the natural food chain, the development of measures related to their protection, the disclosure of bioecological features, and the substantiation of scientific solutions are of great scientific and practical importance. This study provides information on the species composition of gastropod molluscs in the streams of the Nurota Mountains of Uzbekistan. Sampling was carried out at 11 stations from April to November 2019. Molluscs include 4 families (Belgrandiellidae, Lymnaeidae, Physidae and Planorbidae), 5 genera, and 15 species. The dominant family in the malacofauna of the study area is Lymnaeidae, one genus and eight species belonging to this family are found in the area. Most molluscs are found on rocky, sandy substrates around plants. This article describes the biological diversity of animals in streams in the Nurota Mountains of Uzbekistan.
... In other hands, the constancy index indicates that 12 of terrestrial snails prospected are considered as constant species, which represents 52% of the total species, this confirms the stability of the dune ecosystem and the adaptation of its species to climatic and edaphic factors. These results are in harmony with the findings reported by Zaidi et al. (2021). ...
Guennoun et al.: Biodiversity assessment of terrestrial snails (mollusca, gastropoda) of Essaouira' dunes of Morocco: testing factors affecting the distribution of terrestrial molluscs-1957-APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 21(3):1957-1978. Abstract. Essaouira dunes of Morocco is a Biological and Ecological Interest Site (BEIS) that is recently impacted and threatened by human activities and climate change. Hence, this dune ecosystem needs thorough attention to preserve its biodiversity. Our study was carried out to assess the terrestrial mollusc diversity of this BEIS, and to figure out the relationship between environmental factors and terrestrial gastropods distribution. Six stations were chosen according to the variation of ecological factors, such as: type of soil, presence of limestone rocks, type of vegetation, and wind speed. The sampling was adopted using both visual search and quadrat approach. The results revealed the existence of 23 species of terrestrial molluscs; belonging to 18 genera and 11 families. Geomitridea and Helicidae are the most dominant families (56.52%). The highest specific richness was recorded in Ounagha' station, with 17 species. The malacofaunal diversity between stations was also determined by: Constancy, Shannon, Equitability, Simpson and Jaccard indices. The relationship between the distribution of terrestrial snails and abiotic factors were involved using Canonical Correspondence Analysis (CCA). The results showed that wind speed and type of soil represent those relevant factors affecting the distribution patterns of terrestrial gastropods.
... In natural settings, researchers have investigated the factors that influence the distribution and abundance of slugs, including temperature, moisture, and food availability 7 . They have also studied the interactions between slugs and other organisms, including predators, parasites, and competitors. ...
