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All Journal HAYATI Journal of Biosciences JURNAL BIOLOGI INDONESIA
Abywijaya, Ilham Kurnia
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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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.
Co-Authors Agus Hikmat Anjar Tri Wibowo DIDIK WIDYATMOKO Jihans, Fira Fitria Ridesti Rindyastuti