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ARI PITOYO
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret. Jl. Ir. Sutami 36A, Surakarta 57126, Central Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Projecting expansion range of Selaginella zollingeriana in the Indonesian archipelago under future climate condition AHMAD DWI SETYAWAN; JATNA SUPRIATNA; NISYAWATI NISYAWATI; ILYAS NURSAMSI; SUTARNO SUTARNO; SUGIYARTO SUGIYARTO; SUNARTO SUNARTO; PRAKASH PRADAN; SUGENG BUDIHARTA; ARI PITOYO; SAPTA SUHARDONO; PRABANG SETYONO; MUHAMMAD INDRAWAN
Biodiversitas Journal of Biological Diversity Vol. 22 No. 4 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220458

Abstract

Abstract. Setyawan AD, Supriatna J, Nisyawati, Nursamsi I, Sutarno, Sugiyarto, Sunarto, Pradan P, Budiharta S, Pitoyo A, Suhardono S, Setyono P, Indrawan M. 2021. Projecting expansion range of Selaginella zollingeriana in the Indonesian archipelago under future climate conditions. Biodiversitas 22: 2088-2103. The expansion of plant species to outside areas of its original localities has attracted great interest in theoretical ecology. The scientific curiosity of such phenomenon is even deeper when the geographical expansion is confined by natural boundaries and affected by environmental changes, including climates. This study aimed to predict the current suitable habitat niche of Selaginella zollingeriana Spring, a species with original distribution in Java Island, and to project its potential suitable niche in the Indonesian archipelago accounting for future climate conditions. In doing so, we applied the Ecological Niche Modelings (ENMs) using MaxEnt algorithm by employing 30 presence data of S. zollingeriana and twelve enviro-climatic variables. The model predicted around 17.22% (22,095 km2) of the Java Island area is potentially suitable for current habitat niche of S. zollingeriana, consisting of 10.93% (14,028 km2), 4.75% (6,097 km2), and 1.54% (1,970 km2) of low, medium, and high suitability areas, respectively. Under future scenarios, the model predicted the possibility of species expansion into the other four big islands (i.e., Sumatera, Borneo, Sulawesi, and Papua). Nonetheless, the model also predicted a declining trend of the availability of suitable niches wherein from 2030 to 2080 the modeled niche declined about 58% and 59% under the most optimistic and most pessimistic climate change projections, respectively. While this study provides a primary example in predicting species expansion in tropical archipelago, similar studies in a range of contexts (e.g., species, region) are recommended to add more evidence to strengthen the theoretical ground of expansion ecology under climate changes.
Anticipated climate changes reveal shifting in habitat suitability of high-altitude selaginellas in Java, Indonesia AHMAD DWI SETYAWAN; Jatna Supriatna; Nisyawati; Ilyas Nursamsi; SUTARNO SUTARNO; SUGIYARTO SUGIYARTO; SUNARTO SUNARTO; Prakash Pradan; SUGENG BUDIHARTA; ARI PITOYO; SAPTA SUHARDONO; PRABANG SETYONO; MUHAMMAD INDRAWAN
Biodiversitas Journal of Biological Diversity Vol. 21 No. 11 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d211157

Abstract

Abstract. Setyawan AD, Supriatna J, Nisyawati, Nursamsi I, Sutarno, Sugiyarto, Sunarto, Pradan P, Budiharta S, Pitoyo A, Suhardono S, Setyono P, Indrawan M. 2020. Anticipated climate changes reveal shifting in habitat suitability of high-altitude selaginellas in Java, Indonesia. Biodiversitas 21: 5482-5497. High-altitude ecosystems with humid and cool climate are the preferred habitat for some Selaginella species (selaginellas). Such habitats are available in Java, Indonesia, which also has fertile soils with rich mineral contents resulted from volcanic activities. However, the high-altitude ecosystems in Java are threatened by various anthropogenic activities as well as changes in climate conditions, potentially affecting some Selaginella species. This study aimed to investigate the shift in suitable habitat of four species of high-altitude Selaginella spp. (Selaginella involvens, S. opaca, S. ornata, and S. remotifolia) in Java Island under current and future climate conditions predicted by several representative greenhouse gas concentration pathways. Presence data of Selaginella localities were collected from field survey between 2007 and 2014 across the island, as well as occurrence points from the Global Biodiversity Information Facility database. A total of 1,721 occurrence points data along with environmental and climate data were used to develop species distribution models using MaxEnt. Future habitat distributions were projected under four climate scenarios to see the shift in suitable habitat and altitudinal ranges. The results showed that the distribution of the four high-altitude Selaginella species are strongly influenced by altitude, annual average temperature, and annual rainfall. In the present time, 37.32% (48,974 km2) of the area of Java has been predicted to be suitable for high-altitude Selaginella. Under the optimistic climate scenario (RCP 2.6), the highly suitable area will likely to decrease by almost 35% in the year 2080, whereas the medium and low suitable areas will reduce by about 37.2% and 18.3%, respectively. Under the pessimistic scenario (RCP 8.5), about 21.2% of low suitable areas will be lost in 2080, whereas the medium and highly suitable areas are predicted to decrease by around 38.1% and 33.4%, respectively. Under the pessimistic scenario, there will be upward shift by 51.1 m in the year 2030 from the current’s mean altitude and will shift by almost 150 m in the year 2080. The maximum altitude of predicted suitable habitat is also predicted to increase to reach almost 3500 m asl in the year 2080. The results of this study imply that habitat shift of four high-altitude Selaginella species varies depending on the scenario, but in all cases, the losses are greater than gains.
Population, habitat characteristic, and modelling of Endangered Orchid, Paphiopedilum javanicum in Mt. Lawu, Java, Indonesia Muh Arif Romadlon; Fatimah Azzhara; Gilang Dwi Nugroho; Ari Pitoyo
Biodiversitas Journal of Biological Diversity Vol. 22 No. 4 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220448

Abstract

Abstract. Romadlon MA, Azzhara F, Nugroho GD, Pitoyo A. 2021. Population, habitat characteristic, and modelling of Endangered Orchid, Paphiopedilum javanicum in Mt. Lawu, Java, Indonesia. Biodiversitas 22: 1996-2004. Paphiopedilum javanicum (Reinw. ex Blume) Pfitzer or Java Paphiopedilum is an endangered orchid categorized as appendix I in CITES. In its natural habitat, forest fire, habitat fragmentation, and extreme poaching are considerably the prominent threats for the species. The study aims to assess the population distribution, the habitat characteristics and model the suitable habitat of P. javanicum in Mt Lawu, Java, Indonesia using Maxent (Maximum Entropy) modelling. Eighteen subpopulations of P. javanicum spread across the region with a total number of 103 individuals. The majority of the individuals are in the generative phase (93.81%) and the rest are in the vegetative phase (6.19%). In Mt Lawu, P. javanicum can be found at an elevation of 1,231-1,825 m asl. in a deep shady forest floor with a thick litter and canopy cover between 0-77.4%. The soil has pH between 7-7.1 with 21.7%-36.7% of moisture. The air temperature ranging between 21.8?-29.7?C, with humidity of 61%-78.5%. Based on the Maxent test, annual mean temperature, vegetation cover, type of land use, and elevation are the most influencing factor of P. javanicum distribution in Mt Lawu. The model identifies 6814.75 ha areas in Mt Lawu that are suitable for the species distribution. Lawu Purba, the biggest suitable area for P. javanicum habitat in the southern part of the mountain holds the remaining natural forests in the region. The result is expected to provide recommendations for determining priority areas in the conservation efforts for this threatened orchid.
Diversity of root bacterial community associated with seven orchid species from Mount Merbabu National Park, Central Java, Indonesia ARTINI PANGASTUTI; ARI PITOYO; ARI SUSILOWATI; RIZKA MEISARI; IRVY YULIANA; KHATSANATUL AULIA; LIANA PUTRI PUSPITASARI; RUSIANI RUSIANI; HENDRO PRASOJO
Biodiversitas Journal of Biological Diversity Vol. 24 No. 10 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d241050

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Abstract. Pangastuti A, Pitoyo A, Susilowati A, Meisari R, Yuliana I, Aulia K, Puspitasari LP, Rusiani, Prasojo H. 2023. Diversity of root bacterial community associated with seven orchid species from Mount Merbabu National Park, Central Java, Indonesia. Biodiversitas 24: 5676-5684. Indonesia has a high diversity of wild orchids. One of the orchid habitats that has not been widely explored is Mount Merbabu National Park (TNGMb), Central Java, Indonesia. The dependence of orchids on specific microorganisms for survival and growth, especially during early development, has not been widely studied. Endophytes, such as bacteria, can help the host plant grow, tolerate stress, resist disease, acquire nutrients, or form symbiotic relationships. However, bacterial endophytes associated with orchids have not been extensively explored. This research examined the diversity of bacteria associated with orchid roots in Mount Merbabu National Park using a culture-independent method. Seven orchid species were sampled for root bacterial community analysis, that identified as Spathoglottis plicata, Dendrobium sagittatum, Malaxis kobi, Apendicula alba, Pholidota carnea, Dendrobium tenellum, and Bulbophyllum compressa. Bacterial diversity in all orchid roots was high, with several dominant bacterial species. Proteobacteria, Firmicutes, Bacteriodota, and Actinobacteriota were the four most abundant phyla, with Proteobacteria having the highest abundance (37 to 90%) in all samples. The top ten bacteria genera were Pseudomonas, Serratia, Rhodanobacter, Acinetobacter, Escherichia, Bifidobacterium, Clostridium, Parabulkholderia, Faecalibacterium, and Muribaculaceae family that could not be identified at the genus level. Overall, 61, 42, 838, 98, 78, 973, and 1383 OTUs were unique to S. plicata, D. sagittatum, M. kobi, A. alba, P. carnea, D. tenellum, and B. compressa, respectively, whereas all seven species shared 335 OTUs. Our research suggested that environmental factors and the host plant's genetics affect the plant microbiome's composition and diversity. These elements might be essential for ecosystem function and conservation.
Biodiversity and conservation status of flora and fauna in Magetan, East Java, Indonesia: A focus on rare and protected species of mammals, birds and plants OKID PARAMA ASTIRIN; ARI PITOYO; AGUNG HIDAYAT; AMRITA YULI ASTUTI; WIDYA MEGA RAHMAWATI; RADEN WISNU NURCAHYO
Biodiversitas Journal of Biological Diversity Vol. 26 No. 4 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260412

Abstract

Abstract. Astirin OP, Pitoyo A, Hidayat A, Astuti AY, Rahmawati WM, Nurcahyo RW. 2025. Biodiversity and conservation status of flora and fauna in Magetan, East Java, Indonesia: A focus on rare and protected species of mammals, birds and plants. Biodiversitas 26: 1606-1617. Indonesia is recognized for its high level of species endemicity across its islands, but this biodiversity is under significant threat due to high loss rates. Magetan District, East Java Province, Indonesia comprises 8% of protected areas, located adjacent to Mount Lawu, which harbor substantial biodiversity. This study aims to assess the diversity, distribution and protection status of wildlife in Magetan, based on the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and the Minister of Environment and Forestry Regulation of the Republic of Indonesia, especially for mammals, birds and plants. The research utilized a combination of methods, including the collection of biodiversity data from 2013 to 2022, interviews with relevant stakeholders, and field observations. The findings identified three mammalian species and one plant listed under CITES Appendix I. Additionally, 19 wild animal species and one plant species were found to be rare and protected under the government regulation. Among these, five species belong to the mammal group, while 14 species are avifauna group. The highest concentrations of these protected species were observed in the Panekan and Plaosan Sub-districts, highlighting the importance of these two areas for conservation. Conservation strategies are required to protect these animals and plants by avoiding deforestation and habitat restoration. Other conservation strategies are by enforcing laws, addressing human-wildlife conflicts, raising awareness, and conducting regular monitoring. The study provides critical insights for conservation policy development and biodiversity documentation, specifically for Magetan District.
Co-Authors AGUNG HIDAYAT AHMAD DWI SETYAWAN AHMAD DWI SETYAWAN AMRITA YULI ASTUTI ARI SUSILOWATI ARTINI PANGASTUTI Fatimah Azzhara Gilang Dwi Nugroho HENDRO PRASOJO ILYAS NURSAMSI IRVY YULIANA JATNA SUPRIATNA KHATSANATUL AULIA LIANA PUTRI PUSPITASARI Muh Arif Romadlon MUHAMMAD INDRAWAN Nisyawati NISYAWATI NISYAWATI OKID PARAMA ASTIRIN PRABANG SETYONO PRAKASH PRADAN RADEN WISNU NURCAHYO RIZKA MEISARI RUSIANI RUSIANI SAPTA SUHARDONO SUGENG BUDIHARTA SUGIYARTO SUGIYARTO SUNARTO SUNARTO SUTARNO SUTARNO WIDYA MEGA RAHMAWATI