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All Journal Biodiversitas Journal of Biological Diversity
ZULFAIDAH PENATA GAMA
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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Habitat characteristics and threats of little-known endemic dragonfly, Neurothemis feralis (Burmeister, 1839) (Odonata: Libellulidae) in East Java, Indonesia MUHAMAD AZMI DWI SUSANTO; ZULFAIDAH PENATA GAMA; AMIN SETYO LEKSONO
Biodiversitas Journal of Biological Diversity Vol. 25 No. 7 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250712

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Abstract. Susanto MAD, Gama ZP, Leksono AS. 2024. Habitat characteristics and threats of little-known endemic dragonfly, Neurothemis feralis (Burmeister, 1839) (Odonata: Libellulidae) in East Java, Indonesia. Biodiversitas 25: 2907-2920. Neurothemis feralis is a dragonfly with limited distribution and is found only in the lowlands of Java, Sumatra, Krakatau, and Bangka. Its habitats that traverse anthropogenic area face various threats from human activities. Despite the imminent of its depopulation, many essential information regarding the biology of N. feralis remain scarce, deem it with data deficient conservation status according to the International Union for Conservation of Nature (IUCN) Red List. This study aims to study habitat characteristics of N. feralis for future conservation purposes. This study was conducted in Surabaya, Sidoarjo, and Gresik, East Java Province, with a five-month study period of July-November 2023. The results showed that N. feralis prefers locations with 36-64% air humidity, 29.2-35.8°C air temperature, and 16970-36400 lux light intensity. Air humidity positively correlated with the abundance of N. feralis, while high temperatures and light intensity tend to have negative impact. The coverage of vegetation with 20-100 cm height was found as another habitat component that positively affects its abundance, while the loss of this coverage understandably negate the dragonfly abundance. Vegetation provides habitat for N. feralis, as well as its prey, competitors and even predators. Despite N. feralis population can still be observed from urban areas with up to 82.40% residential allotment (within 500 m radius of the study site), the disappearance of its population is likely if believably impending if anthropogenic activities (e.g., land conversion and vegetation burning) continue to occur.
Population dynamics of Bactrocera spp., and parasitization efficacy of Opius sp. (Hymenoptera: Braconidae) in citrus varieties YUNITA FERA RAHMAWATI; AMIN SETYO LEKSONO; AKHMAD RIZALI; ZULFAIDAH PENATA GAMA
Biodiversitas Journal of Biological Diversity Vol. 25 No. 11 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251134

Abstract

Abstract. Rahmawati YF, Leksono AS, Rizali A, Gama ZP. 2024. Population dynamics of Bactrocera spp., and parasitization efficacy of Opius sp. (Hymenoptera: Braconidae) in citrus varieties. Biodiversitas 25: 4350-4359. Citrus crops play an important role in the agricultural sector of Indonesia. However, farmers face major challenges due to the infestations by the fruit fly, Bactrocera spp., which result in significant economic losses. Therefore, this research aimed to identify the periods of fruit fly infestation and evaluate the effectiveness of parasitoids. The population dynamics of Bactrocera spp. and parasitoids were analyzed across four citrus varieties in Malang District from January to December 2023. Bactrocera dorsalis (Hendel, 1912), Bactrocera carambolae Drew & Hancock, 1994, Bactrocera umbrosa (Fabricius, 1805), and Bactrocera cucurbitae (Coquillett, 1899) were identified using pheromone traps and rearing methods. The results showed that B. dorsalis was the dominant species in all citrus varieties, with the highest abundance in siam madu variety. The Duncan Multiple Range Test (DMRT) tested the fluctuation of Bactrocera spp. and the Bray-Curtis Index was used to measure the abundance in each variety, which was then visualized using Non-metric Multidimensional Scaling (NMMS). Meanwhile, Opius sp. exhibited parasitism rates ranging from 13.52 to 69.10% in the four citrus varieties. Environmental factors, variety characteristics, and monoculture influenced fruit fly abundance and parasitoid effectiveness. July was an important period for pest management interventions, as Opius sp. entered an active time to control fruit flies. Understanding the population dynamics of these pests can help predict outbreaks and optimize the timing of control measures using parasitoids.
Diversity, abundance, and ecological roles of insect pollinators in red guava flowers (Psidium guajava) in East Java, Indonesia BUDI PURWANTININGSIH; AMIN SETYO LEKSONO; BAGYO YANUWIYADI; ZULFAIDAH PENATA GAMA; SAIFUL ARIF ABDULLAH
Biodiversitas Journal of Biological Diversity Vol. 26 No. 3 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260320

Abstract

Abstract. Purwantiningsih B, Leksono AS, Yanuwiyadi B, Gama ZP, Abdullah SA. 2025. Diversity, abundance, and ecological roles of insect pollinators in red guava flowers (Psidium guajava) in East Java, Indonesia. Biodiversitas 26: 1211-1219. Red guava (Psidium guajava) is a high-value crop with relatively easy cultivation requirements. However, the decline in pollinating insects is a global issue that has led to reduced guava productivity and harvest yields. This study aimed to analyze the abundance, richness, diversity, evenness, and dominance of insects visiting red guava flowers, as well as to visually examine their visitation patterns across five locations in East Java, Indonesia: Pademonegoro, Tlekung, Oro-Oro Ombo, Junrejo, and Mulyoagung, and assess the ecological roles. A total of 3432 individual insects from 17 families and five orders were identified, with pollinators dominating in all locations. Junrejo exhibited the highest abundance (29.11%) but low diversity (0.78), whereas Pademonegoro had the highest diversity (1.80) with moderate abundance. Statistical analysis revealed no significant differences in insect composition between locations (p>0.05), although PCA analysis indicated variations in insect characteristics at certain sites. Insect activity was influenced by flowering periods, temperature, and light intensity, with peak activity varying across locations. These findings underscore the critical role of pollinators, particularly the Apidae family, in red guava pollination, highlighting their significant contribution. The study also highlights the diverse adaptations of insect communities to their local environments, providing insights into sustainable agroecosystem management through pollinator conservation.
Co-Authors AKHMAD RIZALI AMIN SETYO LEKSONO BAGYO YANUWIYADI BUDI PURWANTININGSIH MUHAMAD AZMI DWI SUSANTO SAIFUL ARIF ABDULLAH YUNITA FERA RAHMAWATI