关键词: 华北豹, 栖息地利用, 红外相机, 生境破碎化, 占域模型

Abstract

Aims: Large carnivores play important roles in ecosystem functions yet are globally threatened and require urgent research and conservation actions. The North China leopard (Panthera pardus japonensis) is a leopard subspecies that is endemic to China. It is the only remaining large carnivore in many forest ecosystems in northern China, and the North China leopard facing severe threats such as habitat degradation and fragmentation. This study aims to assess the habitat use of North China leopards in the Liupanshan Mountains.
Methods: This study was conducted in the Liupanshan Mountains. Infrared cameras were used to survey North China leopard distribution. We constructed occupancy models to analyze species habitat use. Based on species-environmental associations obtained from occupancy modeling, we identified suitable habitat patches, measured species association with human interference, and evaluated habitat fragmentation patterns.
Results: Occupancy modeling revealed that North China leopards occupied habitat patches with mature forest in ragged terrain. The occurrence probability was high in landscapes that were distant from croplands and roads, but the species did not demonstrate significant avoidance to farmland edges and residential areas. We identified 35 suitable habitat patches that were primarily distributed along the east and west ridges of the Liupanshan Mountains. The largest suitable habitat patch had an area of 214 km², and the average area of suitable habitat patches were 16 km². Approximately 55% of all suitable habitat patches were located within the Liupanshan National Nature Reserve boundary.
Conclusions: The primary conclusion of this study is that while the Liupanshan National Nature Reserve effectively conserves existing suitable habitat of North China leopards, the risks of habitat fragmentation and anthropogenic interference still exist. We suggest conservation actions such as habitat capacity building and a restriction of anthropogenic activity in protected area be taken to ensure the long-term persistence of North China leopards. Conservation efforts beyond provincial boundaries should be reinforced to promote the dispersal of North China leopards as well as population recovery. This study fills in the knowledge gaps left by the North China leopards ecological study in the Ningxia Hui Autonomous Region, and has the potential to support conservation planning in the Liupanshan Mountains as well as other regions.

Key words: North China leopard, habitat use, camera trap, habitat fragmentation, occupancy model