Spatial Ecology and Movement Patterns of Apex Predators in Response to Habitat Loss and Human Disturbance

Abstract

Apex predators help control the populations of their prey and keep ecosystems intact. But habitat fragmentation and human disturbances threaten their survival. In this study, research investigated the spatial ecology and movements of three apex predator species across landscapes with varying levels of habitat loss and human disturbance. Satellite telemetry data spanning over 24 months were analyzed across three habitat zones: pristine, moderately disturbed, and highly fragmented. The parameters of movement – home range size, home range pattern, and habitat selection – were compared between disturbed areas. There were significant zone differences. The movement distance of apex predators was greater in areas with fragmented habitats, and their site fidelity was lower. The mean home range sizes were 47.2 km² in pristine areas, 89.6 km² in moderately disturbed areas and 156.8 km² in highly fragmented areas. Restricted movement corridors and increased edge effects were found in human-dominated landscapes. Spatial analysis showed that maintaining habitat connectivity and buffer zones of 2 km or more around protected areas significantly increased predator persistence. Substantial genetic differences were observed between populations separated by fragmentation, as revealed by gene flow analysis. There was a sharp drop in genetic diversity in isolated populations. Connectivity to continuous habitat dropped from 0.89 to 0.42 in fragmented habitats. The number of days moved per day rose by threefold, with the predator moving an average of 8.3 km/day in pristine areas and 21.4 km/day in fragmented areas. Core-area fidelity decreased from 0.78 in pristine landscapes to 0.42 in fragmented landscapes. Conservation strategies need to incorporate the landscape connectivity conservation, protection of corridors and limiting anthropogenic disturbance. Ecosystem integrity and the preservation of apex predator functions in modified landscapes depend on maintaining minimum buffer zones and corridors.