The extent and pattern of Eucalyptus regeneration in an agricultural landscape

摘要: The process of natural regeneration is critical for sustaining remnant native vegetation and the ecosystem services it supports. We quantified extent pattern Eucalyptus within in a fragmented agricultural landscape south-eastern Australia. was absent at 42% sites. Using an information-theoretic approach, we explored 13 possible models across multiple scales. explanatory variables four with empirical support (and their summed Akaike weights) were: grazing intensity (1.0), ground cover (0.99), area (0.83), tenure (0.67), canopy (0.21) type (0.11). Averaging these predicted that probability highest (0.95) relatively unmodified vegetation, is, on public land where light understorey dominated by plants. In contrast, lowest (0.12) small remnants private heavy. Our results suggest large proportion all this will disappear under existing management farming practices. Reducing pressure intensively grazed appears to be single most effective intervention mitigate threat. This require shift conservation priorities away from large, intact does not appear affected, poorer quality remnants—often or scattered trees—where typically absent.