Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal HAYATI Journal of Biosciences BIOTROPIA - The Southeast Asian Journal of Tropical Biology JURNAL BIOLOGI INDONESIA
Abywijaya, Ilham Kurnia
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Immunology & microbiology Veterinary

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
KEANEKARAGAMAN DAN POLA SEBARAN SPESIES TUMBUHAN ASING INVASIF DI CAGAR ALAM PULAU SEMPU, JAWA TIMUR Abywijaya, Ilham Kurnia; Hikmat, Agus; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i2.2103

Abstract

The presence of invasive alien plant species has been known to cause various negative impacts on ecosystems in theinvaded conservation area. This research aims to identify diversity and distribution pattern of invasive alien plantsspecies in Sempu Island Nature Reserve, and to determine the most influential environmental factors to theirdispersion. The methods used were the combination of quantitative vegetation analysis and rapid assessmenttechnique followed by the principal component analysis. As many as 10 invasive alien plants species (belonging to 7families) have been identified within this conservation area, e.g., Pistia stratoites, Ageratum mexicanum, Vernoniacinerea, Cyperus rotundus, Passiflora foetida, Centotheca lappacea, Eleusine indica, Imperata cylindrica, Hedyotiscorymbosa, and Lantana camara. All invasive alien plant species found in the sampling plots had a clumpeddistribution pattern. The most influential environmental factors to the invasive alien plants dispersion were landslope and distance from shoreline.Keywords: distribution pattern, environmental factors, invasive alien plants, Sempu Island Nature Reserve
Phenotypic and Estimated Genetic Variability in Endemic Diospyros celebica Bakh. and Widely-spread D. blancoi A.Dc. Cultivated at Purwodadi Botanic Garden, Indonesia Abywijaya, Ilham Kurnia; Rindyastuti, Ridesti; Jihans, Fira Fitria; Wibowo, Anjar Tri
HAYATI Journal of Biosciences Vol. 31 No. 4 (2024): July 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.4.781-792

Abstract

The endemic Diospyros celebica and widely spread D. blancoi are two valuable species of Diospyros (the genus of persimmons and ebonies) that have been conserved at botanic gardens in Indonesia. Understanding the biological contrasts between endemic and widely spread species is essential for plant conservation. This study aims to compare the phenotypic and estimated genetic variability between the endemic D. celebica and the widely spread D. blancoi to support their conservation. Fifty-three morphological characters from fifteen selected living plant specimens at Purwodadi Botanic Garden were measured directly or using variable encoding methods. Unpaired two-samples Wilcoxon test and hierarchical cluster analysis were used to compare morphological variations between both species. Further, genetic variabilities were estimated from encoded morphological characters using GenAlEx 6.503 software. The two Diospyros’ morphological characters were significantly different, except for the lamina length, pairs of leaf vein, number of flowers in each inflorescence, and the fruit sulci presence. The cluster analysis successfully distinguished D. celebica from D. blancoi according to thirteen comparable morphological characters. The endemic D. celebica has lower genetic variability (female/bisexual %P = 86.21%, He = 0.259, uHe = 0.277; male P = 54.29%, He = 0.195, uHe = 0.234) than the widely spread D. blancoi (female/bisexual %P = 86.76, He = 0.311, uHe = 0.355). Due to the importance of genetic diversity in plant conservation, both species’ population size needs to be maintained, if not increased, to preserve the existing phenotypic and genetic variabilities within the cultivated populations at the botanic garden.
Diversity and Ecology of Understory Plant in Sempu Island, East Java, Indonesia Hapsari, Lia; Abywijaya, Ilham Kurnia; Nurfadilah, Siti; Rindyastuti, Ridesti
BIOTROPIA Vol. 27 No. 3 (2020): BIOTROPIA Vol. 27 No. 3 December 2020
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.0.0.0.1145

Abstract

As an indicator of environmental disturbances, the understory is an important structural and functional component of forest ecosystems. Hence, this study was conducted to assess the diversity and composition of understory plants in the lowland forests adjacent to the trekking paths along Semut Bay (dock entrance), Segara Anakan Lagoon, and several coastal areas in Sempu Island, and to determine their relationship with the underlying environmental factors as disturbance indicators through the presence of understory invasive alien species (IAS). Sixty site plots of 2 × 2 m² were established to analyze the understory vegetation, site profiles, and environmental variables. A total of 135 understory plant species belonging to 108 genera and 60 families were recorded within the 60 plots of the study areas. Poaceae was the dominant family, followed by Compositae, Phyllanthaceae, Sterculiaceae, Rubiaceae, Putranjivaceae, and Cyperaceae. The understory communities in the lowland forest adjacent to Semut Path were dominated by tree seedlings and had a relatively lower composition of shrubs. Coastal areas, which have more open canopies, were dominated by grasses and shrubs. Some dominant native understory species included Grewia spp., Cycas rumphii, and others. Indicating disturbance, 12 understory IAS were found in the study areas. Four of these are among the world’s worst invaders (Ageratum conyzoides, Chromolaena odorata, Lantana camara, Mikania micrantha), and three are noxious weeds (Eleusine indica and Imperata cylindrica). Light intensity and air temperature were strongly and positively associated with disturbed sites, while relative humidity, soil pH, and elevation were associated with less disturbed sites. The study results provide a scientific basis and recommendations on the current diversity status of understory plant species at Sempu Island, helping justify further conservation of indigenous species and their protection from disturbances.
Co-Authors Agus Hikmat Anjar Tri Wibowo DIDIK WIDYATMOKO Jihans, Fira Fitria Lia Hapsari Ridesti Rindyastuti Siti Nurfadilah