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All Journal Biodiversitas Journal of Biological Diversity
IMAM WIDHIONO
Faculty of Biology, Universitas Jenderal Soedirman. Jl. dr. Suparno No. 63, Banyumas 53122, Central Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Species distribution model and population dynamics of invasive alien plant Calliandra calothyrsus in Gunung Ciremai National Park, West Java, Indonesia IING NASIHIN; IMAM WIDHIONO; EMING SUDIANA; NURDIN NURDIN; NINA HERLINA; WITIYASTI IMANINGSIH
Biodiversitas Journal of Biological Diversity Vol. 25 No. 12 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251217

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Abstract. Nasihin I, Widhiono I, Sudiana E, Nurdin, Herlina N, Imaningsih W. 2024. Species distribution model and population dynamics of invasive alien plant Calliandra calothyrsus in Gunung Ciremai National Park, West Java, Indonesia. Biodiversitas 25: 4806-4815. Invasive alien plants are a serious threat to conservation areas since they will threaten biodiversity by over-dominating species composition and reducing diversity. However, conservation area managers have not taken invasive alien plant management seriously. Calliandra calothyrsus is one of the invasive alien plant species that has been reported to occur in conservation areas. The purpose of this study was to develop a habitat suitability model and investigate population dynamics of C. calothyrsus in Gunung Ciremai National Park (GCNP), West Java Province, Indonesia. Maximum Entropy (MaxEnt) was used to build the model using 13 environmental predictors, including climate, physical, and soil characteristic variables. Population structure data were collected from 98 sampling plots, each measuring 10x10 m. The population dynamics and distribution of C. calothyrsus populations were analyzed using RangeShifter software with 50 years of simulation. The results showed an AUC value of >0.80, indicating the distribution model of C. calothyrsus has a high level of agreement between the model prediction and actual observation. Simulation analysis shows that the population of C. calothyrsus in GCNP will continue to increase over the next 50 years and spread throughout the park from where the occurrences of C. calothyrsus were recorded. The findings of this study suggest that managing the growth of the C. calothyrsus population from seedling to sapling is necessary, while restoring bare ground and shrub can prevent the spread of C. calothyrsus.
Selection of Ficus spp. species for rehabilitation of degraded land in Kuningan District, West Java, Indonesia YAYAN HENDRAYANA; ILHAM ADHYA; DEDE KOSASIH; IMAM WIDHIONO; FAWAZ FAUZI ALFAHRI; INDRI SIGI APRIANTIKA; SURYA VAINES
Biodiversitas Journal of Biological Diversity Vol. 26 No. 7 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260711

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Abstract. Hendrayana Y, Adhya I, Kosasih D, Widhiono I, Alfahri FF, Apriantika IS, Vaines S. 2025. Selection of Ficus spp. species for rehabilitation of degraded land in Kuningan District, West Java, Indonesia. Biodiversitas 26: 3199-3208. Land degradation is an environmental problem caused by various factors, including unsustainable land use, deforestation, and harmful agricultural practices. An effective method to overcome this problem is through land rehabilitation by replanting trees in the degraded areas. Therefore, this study aimed to select Ficus tree species for the rehabilitation of critical lands in Kuningan District, West Java, Indonesia. Data was collected using a field survey by making observation plots to document the presence of Ficus tree species in three land use types in the district, namely sand excavation area (Cidahu, Ciawigebang, and Japara Sub-districts), community gardens (Ciniru, and Hantara Sub-districts), and secondary forests (Selajambe, Subang, Cilebak Sub-districts). Vegetation analysis was conducted to calculate the importance value index and species similarity index. The results showed that there were 16 Ficus tree species across the surveyed locations with six species were found simultaneously in all three land uses, including F. benjamina, F. fistulosa, F. septic, F. variegata, F. ampelas, F. virens var. glabella. Other species included F. annulata, F. callosa, F. elastica, F. fulva, F. gibbosa, F. hispida, F. microcarpa, F. racemosa, F. sinuata, and F. subulata. Thus, the six species are recommended for the rehabilitation of degraded lands in Kuningan District.
Co-Authors DEDE KOSASIH EMING SUDIANA FAWAZ FAUZI ALFAHRI IING NASIHIN ILHAM ADHYA INDRI SIGI APRIANTIKA NINA HERLINA NURDIN NURDIN SURYA VAINES WITIYASTI IMANINGSIH YAYAN HENDRAYANA