Subba Asmit, Tamang Ganesh, Lama Sony, Limbu Jash Hang, Basnet Nabin, Kyes Randall C, Khanal Laxman
Central Department of Zoology, Institute of Science and Technology Tribhuvan University Kathmandu Nepal.
Nature Conservation and Study Center Kathmandu Nepal.
Ecol Evol. 2024 Dec 15;14(12):e70726. doi: 10.1002/ece3.70726. eCollection 2024 Dec.
Globally, urban expansion has led to habitat fragmentation and altered resource availability, thus posing significant challenges for wildlife. The Chinese pangolin () is a critically endangered species experiencing population decline due to illegal trade and habitat degradation. This study analyzed variables affecting habitat occupancy of Chinese pangolins using a single-season occupancy model across 134 study grids (600 m × 600 m) in peri-urban areas of Dharan Sub-Metropolitan City, eastern Nepal. We identified termite mounds as a significant key factor (top model with AICwt = 1) in the detection probability of Chinese pangolin burrows ( = 1.48, 95% CI = 1.07 to 1.89). Additionally, the Human Disturbance Index (HDI) emerged as the key variable for habitat use occupancy (AIC = 231.96, AICwt = 0.309), indicating a significant negative impact ( = -6.555, 95% CI = -11.324 to -1.7723). We observed a mean HDI of 0.475 ± 0.04 in the grids where Chinese pangolins were detected, with higher HDI values correlating with reduced Chinese pangolin occupancy. For the long-term conservation of Chinese pangolins in urban landscapes, it is crucial to reduce anthropogenic activities and implement conservation measures to protect suitable habitats with abundant termite mounds.
在全球范围内,城市扩张导致了栖息地破碎化和资源可利用性的改变,从而给野生动物带来了重大挑战。中华穿山甲()是一种极度濒危物种,由于非法贸易和栖息地退化,其种群数量正在下降。本研究使用单季占有率模型,分析了尼泊尔东部达兰次都市周边地区134个研究网格(600米×600米)中影响中华穿山甲栖息地占有率的变量。我们确定白蚁丘是中华穿山甲洞穴探测概率中的一个重要关键因素(AIC权重=1的顶级模型)(=1.48,95%置信区间=1.07至1.89)。此外,人类干扰指数(HDI)成为栖息地利用占有率的关键变量(AIC=231.96,AIC权重=0.309),表明存在显著的负面影响(=-6.555,95%置信区间=-11.324至-1.7723)。在检测到中华穿山甲的网格中,我们观察到平均HDI为0.475±0.04,HDI值越高,中华穿山甲的占有率越低。为了在城市景观中对中华穿山甲进行长期保护,减少人为活动并实施保护措施以保护有丰富白蚁丘的适宜栖息地至关重要。