Population study and habitat preferences of Pinang Jawa (Pinanga javana) in Mt. Slamet, Central Java, Indonesia

Zulkarnaen, Rizmoon Nurul; Nisyawati, Nisyawati; Witono, Joko Ridho

doi:10.13057/biodiv/d200314

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…This condition is possible due to differences in the microclimate of the south slope with other slopes. This slope showed high rainfall and lower temperatures than others [9,10]. In contrast, the eastern slope exhibits that the palm population is the lowest (no palm population).…”

Section: The Southern Slopementioning

confidence: 76%

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Palm species diversity on Mount Slamet, Central Java, Indonesia

Zulkarnaen

Helmanto

Fikriyya³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The palm plant group exists widespread in the world, including in Indonesia. The palm population occupies limited and specific scope areas. Palm diversity on Mt Slamet of Central Java, Indonesia, has not been reported. This study aimed to reveal the existence of palm diversity that occupies different sides of Mt. Slamet, i.e., the southern, the eastern, the western, and the northern slopes. The method used purposive sampling consisting of 236 10×10-m-plots on the palm population found along the climbing path of the four sides. The results showed that the diversity of the palm within each slope was significantly different. The palm diversity on the southern slope reveals the highest species richness and abundance with Pinanga javana. However, there is no single palm population existing on the eastern slope. The palm population on the western and northern slopes was not significantly different because of the similar number of species found. The southern slope has more stable microclimate factors, such as rainfall and temperature, that support the conclusion that the habitat on the area is in the most stable condition for the palm population.

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Section: The Southern Slopementioning

confidence: 76%

“…The previous study was restricted to the southern slope population and could not be comprehensively analyzed [7] due to the lack of similarity data obtained. Also, note that Mt.Slamet forest is essential to conserve many plant species, especially endemic species such as Pinanga javana Blume [4,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Palm species diversity on Mount Slamet, Central Java, Indonesia

Zulkarnaen

Helmanto

Fikriyya³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…This may be due to the interfoliar type of flowering so that the appearance of the fruit sheath takes longer. This condition is different from the flowering type of infrafoliar palms where the prophyll appears after the leaf sheath falls off, such as the Pinanga javana (Zulkarnaen et al, 2019;Zulkarnaen et al, 2021).…”

Section: Flowering Phenology Of Nenga Gajahmentioning

confidence: 84%

Flowering Phenology of Pinang Gajah (Nenga gajah J. Dransf.) in The Bogor Botanic Gardens

Zulkarnaen¹,

Astuti²,

Witono³

et al. 2022

Al-Kauniyah J. Biol.

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Nenga gajah J. Dransf. is an endemic palm species originating from the island of Sumatra. The palm is one of the collections of the Bogor Botanic Gardens with seven collection numbers of N. gajah from Jambi and Riau. However, the reproduction information of the palm is still unknown until now. Information on the phenology of flowering is essential in conservation activities, especially its presence in nature and the production of seeds for reintroduction purposes. This study aims to determine the phases and timing of the flowering period and the factors that influence the flowering of N. gajah in the Bogor Botanic Gardens. This study was conducted on individuals at the phase of initiation of flowering. Flowering observation variables include the length of the period from flower buds to the anthesis phase until the flowers wither, and the fertilization process from young fruit to ripe. The flower and fruit of N. gajah were documented in each stage. The data recorded included flower and fruit development time for each phase and visiting insects. Data analysis was carried out descriptively to describe the process of flowering and fertilization that occurred. The results showed that the flower initiation phase took an average of 25.5 days, the anthesis phase took 6–7 days, the anthesis phase took 7–9 days, and the fruit formation and ripening phase took 100–120 days. Insects that are thought to act as pollinating insects for N. gajah include Trigona sp., Polyrachis sp., and Apis sp.AbstrakNenga gajah J. Dransf. merupakan salah satu jenis palem endemik yang berasal dari Pulau Sumatra. Palem tersebut menjadi salah satu koleksi Kebun Raya Bogor dengan tujuh nomor koleksi N. gajah yang berasal dari Jambi dan Riau namun informasi reproduksi palem tersebut masih belum diketahui hingga kini. Informasi fenologi pembungaan tersebut sangat diperlukan dalam kegiatan konservasi, khususnya keberadaannya di alam dan produksi biji untuk tujuan reintroduksi. Penelitian ini bertujuan untuk mengetahui fase-fase dan waktu periode pembungaan dan mengetahui faktor-faktor yang memengaruhi pembungaan N. gajah di Kebun Raya Bogor. Penelitian ini dilakukan terhadap individu yang berada pada tahap inisiasi pembungaan. Variabel pengamatan pembungaan meliputi panjang periode dari kuncup bunga menuju fase antesissampai bunga layu dan proses pembuahan dari buah muda sampai masak. Perkembangan bunga dan buah N. gajah didokumentasikan pada setiap fase, data yang dicatat meliputi waktu perkembangan bunga dan buah untuk setiap fase, serta serangga pengunjung. Analisis data dilakukan secara deskriptif untuk menggambarkan proses pembungaan dan pembuahan yang terjadi. Hasil pengamatan menunjukkan bahwa fase inisiasi bunga membutuhkan waktu rata-rata 25,5 hari, menuju fase antesis membutuhkan waktu 6–7 hari, fase antesis membutuhkan waktu 7–9 hari, dan fase pembentukan dan pematangan buah membutuhkan waktu 100–120 hari. Serangga yang diduga berperan sebagai serangga penyerbuk N. gajah antara lain Trigona sp., Polyrachis sp., dan Apis sp.

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“…Habitat preferences data were taken based on the presence (42 plots) and absence (61 plots) of S. microphylla in the observation plot. The environmental parameters included elevation recorded by GARMIN GPSMAP 78S, slope and aspect taken using Suunto® Tandem Global Compass/Clinometer, canopy cover recorded using Habitapp (Zulkarnaen et al 2019), soil pH and soil moisture taken by Takemura DM 5 Soil tester. Trees that grew around the habitat of S. microphylla were inventoried and identified to determine the association of tree species with a plot size of 20x20 m 2 .…”

Section: Sampling Methodsmentioning

confidence: 99%

Habitat preference and spatial distribution model of threatened species Saurauia microphylla in Mt. Slamet, Central Java, Indonesia

et al. 2020

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Abstract. Helmanto H, Nisyawati, Robiansyah I, Zulkarnaen RN, Fikriyya N. 2020. Habitat preference and spatial distribution model of threatened species Saurauia microphylla in Mt. Slamet, Central Java, Indonesia. Biodiversitas 21: 2946-2954. Saurauia microphylla de Vriese has the potentials for medicinal uses, yet it is listed in the IUCN Red List under Vulnerable status. The natural population of this species is only found in highlands one of which is in Mount Slamet, Central Java, Indonesia. This study aims to determine the population structure, habitat preference and predicted spatial distribution of S. microphylla in the Mount Slamet area. The method used was purposive sampling by establishing 103 observation plots with size of 20x20 m2 for each plot. The research parameters recorded were abiotic variables and biotic associations. Data were analyzed using Principal Component Analysis (PCA) to determine the most influencing environmental factors on the presence of S. microphylla. Species association of S. microphylla was analyzed using the Jaccard index equation. Spatial distribution model was analyzed using Maxent (Maximum Entropy) software. The results showed that S. microphylla populations were found in highland forest areas with elevations of 1689-2265 m above sea level, slope of 3-40°, temperature of 16°-26°C, air humidity of 49.3-90%, soil pH 5.8-7, soil moisture 5-70% and canopy cover of 0-92%. Our analyses revealed that elevation is the most influential factor in the presence of S. microphylla. There are 20 tree species which found around S. microphylla habitat with 4 species have significant association with the species. The spatial distribution model showed that S. microphylla spread across all the slopes of Mount Slamet with the southwestern slope was predicted had the most extensive habitat suitability for the species and become smaller to the north, east, and south slopes.

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Population study and habitat preferences of Pinang Jawa (Pinanga javana) in Mt. Slamet, Central Java, Indonesia

Cited by 8 publications

References 24 publications

Palm species diversity on Mount Slamet, Central Java, Indonesia

Palm species diversity on Mount Slamet, Central Java, Indonesia

Flowering Phenology of Pinang Gajah (Nenga gajah J. Dransf.) in The Bogor Botanic Gardens

Habitat preference and spatial distribution model of threatened species Saurauia microphylla in Mt. Slamet, Central Java, Indonesia

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