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AUTECOLOGY OF INVASIVE SPECIES Cyperus rotundus L. IN FOREST EDGE OF POHEN MOUNTAIN, BATUKAHU NATURE RESERVE, BALI, INDONESIA Sutomo Sutomo; Dini Fardila
Metamorfosa: Journal of Biological Sciences Vol 2 No 2 (2015)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2015.v02.i02.p01

Abstract

Anthropogenic-origin forest disturbance has been known to increase the risk of invasion to native habitat. Invasive species caused problems for local ecosystems and their native species. TheĀ  research on the dynamics and autecology of invasive species Cyperus rotundus was conducted on anthropogenic disturbed Pohen mountain forest in Bali, Indonesia. Results showed significant changes in microclimatic variables from forest edge to interior. C. rotundus in Pohen mountain forest can be found in a road edge and forest exterior where sunlight is abundant and decrease in a more shady sites and absent under thick forest canopies CCA ordination analysis showed that C. rotundus in Pohen mountain forest tends to co-occur together with Imperata cylindrica and Bidens biternata. To be able to control potentially troublesome exotic invasive species, firstly we have to understand what factors limit their growth and development. Therefore this study is has important value because the data which fromĀ  result in studying invasive species autecology will act as baseline data that will be useful to generate management program including rehabilitation and restoration program. Key words: species dynamics, autecology, Cyperus rotundus, Pohen mountain forest, Bali
PLANT COMMUNITY AND SOIL RELATIONSHIP FOLLOWING WILDFIRES FROM NUEES ARDENTES ON MT. MERAPI Sutomo, Sutomo; Fardila, Dini
BIOTROPIA Vol. 19 No. 1 (2012): BIOTROPIA Vol. 19 No. 1 June 2012
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13052.702 KB) | DOI: 10.11598/btb.2012.19.1.248

Abstract

At a local scale, vegetation patterns are known to have strong relationships with edaphic factors. In the case of Mt. Merapi volcanic eruption, studies on the relationships between edaphic factors and plant community composition and distribution following the nuees ardentes-ignited wildfires will provide valuable information on post-disturbance secondary successional processes. We collected soil and vegetation data from five different ages of nuees ardentes fire-affected secondary succession forests and one un-affected forest. Our results showed significant correlation of species composition and edaphic factors among sites of secondary forests. Nitrogen and soil water content were found to be the important factors in structuring species composition in the youngest site, where the N-fixing legume species such as Calliandra callothyrsus was found to be dominant. CCA ordination also revealed strong negative correlation between nitrogen content and legume group, while non-legume group were positively correlated with other edaphic factors such as phosphor and potassium. These findings suggested that changes in soil properties due to recovery of this system after volcanic eruption correlated with plant community composition and can be crucial factors in driving the successional trajectory. Understanding ecosystem reassembly process and trajectory of succession will improve how we approach the restoration of Mt. Merapi ecosystem.