公路亚洲象通道生境质量评估与营造对策
Evaluation and Improvement of Habitat Quality Around Crossing Structures for Asian Elephants
为评估公路亚洲象通道生境质量,提升公路两侧亚洲象栖息地的连通性,减少人象冲突事件的发生,基于现场调查与无人机航拍技术,解析云南思小高速和思澜高速13处通道的生境特征,识别亚洲象利用通道的适宜区域和非适宜因素,构建通道生境扰动度指数,定量评价了亚洲象通道的扰动程度。结果显示,思澜高速的通道适宜面积大小、适宜面积比例和平均扰动程度均高于思小高速的通道,但差异并不显著。思澜高速亚洲象通道附近人为干扰程度较高,主要体现在居民点和人工林分布多且零散,部分通道与地方道路交叉等,但亚洲象利用了几乎所有的通道。思小高速亚洲象通道附近人为干扰程度低,通道附近虽然有人工林干扰,但由于周边原始次生林广泛分布,且通道距离河流较近,抵消了不利影响。根据不同通道的干扰因素,提出了保护和恢复原生植被、保护自然河流和水塘、补植亚洲象食源植物等生境营造对策。研究结果为改善两条高速公路亚洲象通道的利用效果提供了科学依据。
To assess the habitat quality of the Asian elephant crossing structures along highways, enhance the connectivity of the Asian elephant habitats on both sides of the road, and reduce human-elephant conflicts, this study combined field surveys with UAV photography to analyze the habitat characteristics of 13 crossing structures on the Simao-Xiaomengyang Expressway and Simao-Lancang Expressway in Yunnan province. It identified the suitable regions and unsuitable factors for Asian elephants using the crossing structures, constructed a crossing habitat disturbance index, and quantitatively evaluated the disturbance levels of the Asian elephant crossing structures. The results showed that the area and proportion of suitable areas and the average disturbance level of crossing structures on Simao-Lancang Expressway were higher than those on Simao-Xiaomengyang Expressway, but the differences were not significant. The area around the Asian elephant crossing structures on the Simao-Lancang Expressway had a higher degree of human disturbance, mainly manifested by scattered residential points and artificial forests, and some crossing structures intersected with local roads, but Asian elephants utilized almost all of the crossing structures. The area around the Asian elephant crossing structures on Simao-Xiaomengyang Expressway had a lower degree of human disturbance; although there were disturbances from artificial forests, the widespread distribution of surrounding secondary forests and the proximity of the crossing structure to rivers offset the adverse effects. Based on the disturbance factors of different crossing structures, the study proposed habitat enhancement strategies such as protecting and restoring native vegetation, protecting natural rivers and ponds, and supplementing food plants for Asian elephants. The research provides a scientific basis for improving the utilization of the Asian elephant crossing structure on the two expressways.
道路生态学 / 野生动物 / 亚洲象 / 栖息地 / 动物通道 / 无人机
road ecology / wildlife / Asian elephant / habitat / wildlife crossing structure / UAV(Unmanned Aerial Vehicle)
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