Mapping potential connections between Southern Africa's elephant populations

Area of Science:

• Ecology and conservation biology
• Spatial analysis of wildlife populations

Background:

• Southern Africa hosts 80% of the world's savannah elephants (Loxodonta africana).
• Elephant populations are largely confined to isolated protected areas, raising concerns about fragmentation.
• Understanding connectivity is crucial for the long-term survival of Loxodonta africana.

Purpose of the Study:

• To assess the prospects for improving landscape connectivity for savannah elephants in Southern Africa.
• To identify key environmental and human-induced barriers to elephant dispersal.
• To map suitable habitats that accommodate both elephants and human land use.

Main Methods:

• Integration of 1.2 million telemetry observations from 254 elephants.
• Analysis of spatial data on environmental factors and human land use across eight countries.
• Geospatial modeling to identify suitable elephant landscapes considering anthropogenic constraints.

Main Results:

• Telemetry data revealed natural features limiting elephant movement.
• Human factors, such as fencing, significantly restrict or prevent elephant dispersal.
• A map of suitable, human-compatible landscapes for elephants was generated.
• Five case studies detailed environmental and anthropogenic constraints.

Conclusions:

• Landscape fragmentation poses a significant threat to Southern Africa's savannah elephant metapopulation.
• Strategic landscape management is needed to restore and maintain crucial elephant corridors.
• Feasible connections for Loxodonta africana were identified, while others were deemed no longer viable.