Pioneer Vegetation Analysis and Ecological Disturbance Interpretation in the Sidoarjo Mudflow (LUSI) Area Based on Hazard Microzonation Map Classification
Analisis Vegetasi Pionir dan Interpretasi Gangguan Ekologi pada Kawasan Lumpur Sidoarjo (LUSI) Berdasarkan Klasifikasi Peta Mikrozonasi Tingkat Bahaya
DOI:
https://doi.org/10.21070/ups.11549Keywords:
Pioneer Vegetation, Sidoarjo Mudflow, Microzonation, Important Value Index, Ecological ConditionsAbstract
The Sidoarjo Mudflow (LUSI) disaster has altered landscape characteristics and environmental conditions, influencing pioneer vegetation colonization across different hazard zones. This study analyzed pioneer vegetation structure, determined the Important Value Index (IVI) of pioneer species, and interpreted ecological conditions across microzonation hazard levels. The research was conducted from April to May 2026 in six hazard zones using purposive sampling with 1 × 1 m belt transects. Vegetation structure was assessed through density, frequency, dominance, and IVI, followed by descriptive quantitative analysis and ecological interpretation. No pioneer vegetation was found in the very high hazard zone. Dominant species in the remaining zones were Typha latifolia (IVI = 222.18), Panicum repens (130.95), Ischaemum rugosum (113.30), Cleome rutidosperma (77.77), and Bidens pilosa (116.13). Vegetation structure varied along ecological gradients, primarily influenced by electrical conductivity and soil temperature, indicating its potential as a biological indicator of ecological conditions and ecosystem recovery the LUSI area.
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