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All Journal Biodiversitas Journal of Biological Diversity
AMIN SETYO LEKSONO
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya. Jl. Veteran, Malang 65145, East Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Characteristics of olive ridley sea turtle (Lepidochelys olivacea) nesting beaches and hatcheries in Bantul, Yogyakarta, Indonesia Agung Budiantoro; CATUR RETNANINGDYAH; LUCHMAN HAKIM; AMIN SETYO LEKSONO
Biodiversitas Journal of Biological Diversity Vol. 20 No. 11 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d201103

Abstract

Abstract. Budiantoro A, Retnaningdyah C, Hakim L, Leksono AS. 2019. Characteristics of olive ridley sea turtle (Lepidochelys olivacea) nesting beaches and hatcheries in Bantul, Yogyakarta, Indonesia. Biodiversitas 20: 3119-3125. We analyzed the ecological conditions of the beaches in Bantul, Java, Indonesia, in supporting the olive ridley sea turtle emergences and nesting. The study was performed at four beaches in Bantul, namely Pelangi, Samas, Goa Cemara, and Pandansimo. We collected data in areas where olive ridley sea turtle nests, such as beach width, slope, sand size, the percentage of magnetic mineral, daily temperature fluctuations, hatchlings rates, and vegetation. The results showed that Pelangi Beach was broader and steeper (31.26 m; slope 5.10°) than the rest (p<0.05). There was no difference in the sand size (diameter of 0.99 mm). The magnetic mineral content in sand ranged from 51.68-87.50%, while the daily temperature ranged from 24.3-31.0°C. The average percentage of hatchlings from 2012 to 2018 was 60.89%. Vegetation on the four beaches is almost the same, which was shrimp pine trees, runny grass, thistle, papyrus, and pandanus thorns. The average pH level of the nest hatchery was 7, supporting the hatchling embryology process. Ecologically, Pelangi Beach is the best turtle landing site in Bantul. Furthermore, transferring olive ridley sea turtle eggs to seminatural nests is recommended due to the quite high hatching rate.
The abundance and diversity of grasshopper communities in relation to elevation and land use in Malang, Indonesia Amin Setyo Leksono; Bagyo Yanuwiadi; Aminudin Afandhi; MOHAMMAD FARHAN; Anisa Zairina
Biodiversitas Journal of Biological Diversity Vol. 21 No. 12 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d211206

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Abstract. Leksono AS, Yanuwiadi B, Afandhi A, Farhan M, Zairina A. 2020. The abundance and diversity of grasshopper communities in relation to elevation and land use in Malang, Indonesia. Biodiversitas 21: 5614-5620. Ecological factors include interactions of the community members with numerous biotic and abiotic factors such as temperature, humidity, precipitation, light intensity, and seasonality show an altitudinal gradient. Most grasshopper species play a role as herbivores and are a good source of protein for other animals such as amphibians, small reptiles, birds, and small mammals. This study aimed to analyze variations in the abundance, richness, and diversity of grasshopper species along an altitudinal gradient. This research was conducted in five locations in Malang District, East Java, Indonesia, namely Bantur, Sumber Pujung Lawang, Pujon, and Poncokusumo. Grasshopper sampling was carried out by the sweeping method using an insect net. Sweepings were carried out on four plots with each plot size of 2 x 10 m2. Sampling was conducted four times from June to August 2020. The data were analyzed using the Shannon Wiener index (diversity analysis) and the Bray-Curtis index. The differences between locations were tested by one-way analysis of variance. Land use was analyzed by ArcGIS, using Landsat imagery 8. The abundance of grasshoppers had a significant negative correlation with elevation. That correlation was positive to species richness and diversity of grasshoppers. That with species diversity was significant, while that with species richness was not significant. The greatest abundance of the grasshopper was found in the middle elevation in Lawang (19.39 ± 2.12). In contrast, the highest species richness and diversity were found in the highest elevation in Poncokusumo (richness = 15.75 ± 1.60 and H '= 2.58 ± 0.11). Land use variation was not significant on abundance, species, richness, and diversity of grasshoppers. Interestingly, the high similarity of the grasshopper compositions in low elevation habitats was detected, indicating that land use in the low land area was remarkable. The abundance of grasshopper had a significant positive correlation with temperature but negatively correlated with humidity. There was no significant correlation among species richness, species diversity with temperature and humidity.
Grasshopper diversity in organic and conventional farm lands in Batu City, East Java, Indonesia RISKA PUTRI QUROTAAYUNINA; AMIN SETYO LEKSONO; DWI SUHERIYANTO; WAHEED ALI PANHWAR
Biodiversitas Journal of Biological Diversity Vol. 27 No. 3 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270339

Abstract

Abstract. Qurotaayunina RP, Leksono AS, Suheriyanto D, Panhwar WA. 2026. Grasshopper diversity in organic and conventional farm lands in Batu City, East Java, Indonesia. Biodiversitas 27 (3): d270339. https://doi.org/10.13057/biodiv/d270339. Grasshoppers are sensitive to environmental changes and can serve as effective bioindicators in agroecosystems. This study assessed their abundance, diversity, and community composition across different farm types and sampling times in organic and conventional farming systems, and evaluated their indicator potential. Surveys were conducted at six sites: Organic Fruit (OF), Conventional Fruit (CF), Organic Paddy (OP), Conventional Paddy (CP), Organic Vegetables (OV), and Conventional Vegetables (CV). At each site, sampling was performed using sweep nets across five plots during morning, noon, and afternoon periods. Data were analyzed using Generalized Linear Mixed Models to test differences in abundance, species richness, diversity, and dominance. Community similarity was evaluated using the Bray-Curtis index, species-environment relationships using Canonical Correspondence Analysis (CCA), and indicator species using the Indicator Value (IndVal) method. A total of 25 species comprising 5,636 individuals were recorded. Farm type significantly affected all community parameters (abundance, species richness, dominance and diversity), while sampling time influenced only abundance and species richness, with no significant interaction effects. The highest abundance, richness, and diversity were observed in organic fruit and organic paddy systems, whereas the lowest values occurred in conventional vegetable fields. Community composition was shaped by farm type and wind speed. Several species were found to have potential as group or individual indicator species, such as Anaxipha sp., and Phlaeoba infumata in OF; Caryanda spuria and Tagasta marginella in CF; Conocephalus fasciatus and Atractomorpha angusta in OP; and Oxya hyla in CP. No indicator species were identified in vegetable farms. Overall, the results demonstrate that organic farming supports higher grasshopper diversity and more structured communities, highlighting its importance for biodiversity conservation and the use of grasshoppers as ecological indicators.
Co-Authors Agung Budiantoro Aminudin Afandhi Anisa Zairina Bagyo Yanuwiadi CATUR RETNANINGDYAH DWI SUHERIYANTO LUCHMAN HAKIM MOHAMMAD FARHAN RISKA PUTRI QUROTAAYUNINA WAHEED ALI PANHWAR