THE DYNAMICS OF LAND OCCUPATION BY INVASIVE ALIEN SPECIES ON POST FIRE FOREST AREA IN MOUNT CIREMAI NATIONAL PARK
IAS occupation in burnt areas is a major problem because of its ability to grow rapidly to cover the area, thus inhibiting the regeneration of native species. The purpose of this study was to determine the dynamics of land occupation by IAS in the former fire area in the TNGC area. The research was...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68726 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | IAS occupation in burnt areas is a major problem because of its ability to grow rapidly to cover the area, thus inhibiting the regeneration of native species. The purpose of this study was to determine the dynamics of land occupation by IAS in the former fire area in the TNGC area. The research was conducted by taking a sample location in the Lambosir Block and classified into three based on the vegetation cover (shrubs, calliandra stands, and natural forest). Then the vegetation data was collected using the quadratic transect method with plot sizes for trees (20x20 m2), poles (10x10 m2), saplings and shrubs (5x5 m2), seedlings and herbs (2x2 m2). Vegetation data analysis was carried out to obtain species dominance (INP) and the Shannon-Wiener species diversity index (H'). Furthermore, the types included in the IAS were identified based on the list of “75 Important IAS in Indonesia” in 2016. After that, the most dominant IAS was modeled using MaxEnt with environmental variables including NDVI, slope, elevation, aspect, hillshade, solar radiation, distance from rivers and rainfall. Then a risk analysis is carried out through the parameters of invasiveness, impact, and potential distribution. The results showed that in the three types of vegetation cover, 75 types of plant species were found. The most dominant species in the scrub cover were Acmena acuminatissima and Dalbergia latifolia. In calliandra stand cover, it was dominated by Radermachera glandulosa, Toona sinensis, and Pinus merkusii. The natural forest cover was dominated by Villebrunea rubescens, Cinnamomum iners, Caryota mitis, and Schima wallichii. Of all plant species, 13 species of IAS were identified, all of which were herbs and shrubs. The most dominant IAS were Imperata cylindrica, Pteridium aquilinum, Calliandra calothyrsus, and Melatoma affine. MaxEnt modeling results show that the area has the potential as a distribution area for I. cylindrica (42.1 Ha) and C. calothyrsus (22.97 Ha). In general, the most dominant IAS has a clustered distribution pattern (Id>1). The risk of IAS invasiveness was categorized as high to very high, indicated by Imperata cylindrica (481.58), Calliandra calothyrsus (392.98), Melastoma affine (117.89), and Pteridium aquilinum (128).
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