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Energy-based corridor identification for mammals between protected areas in Iran.

Ehsan Rahimi¹, Pinliang Dong², Faraham Ahmadzadeh¹

¹Environmental Sciences Research Institute Shahid Beheshti University Tehran Iran.

Ecology and Evolution

|June 12, 2024

Summary

Body mass influences animal energy expenditure and movement. This study used energy landscapes to map corridors for mammals in Iran, finding many shared paths for small and large species, highlighting the need for inclusive mapping methods.

Keywords:

barriers corridor mapping energy usage linkage mapper pinch‐points protected areas

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Area of Science:

Ecological modeling
Landscape ecology
Biogeography

Background:

Body mass is a key determinant of energy expenditure in terrestrial locomotion.
The energy landscape concept aids in understanding animal movement in relation to environmental characteristics.
Previous methods for resistance mapping and corridor delineation have limitations.

Purpose of the Study:

To generate resistance maps incorporating digital elevation models and mammal body size data.
To delineate potential corridors and identify barriers/pinch-points for mammals in Iran.
To compare corridor use by small versus large mammals.

Main Methods:

Utilized the enerscape R package to create resistance maps (kcal) using DEMs and body mass (0.5–100 kg).
Adjusted maximum dispersal distances (50–200 km) for different body sizes.
Employed the Linkage Mapper toolkit to identify corridors between protected areas in Iran.

Main Results:

Generated four resistance maps per body size scenario.
Identified numerous shared corridors utilized by both small (e.g., 500g) and large (e.g., 100kg) mammals.
Found significant overlap in least-cost paths despite differing energy requirements.

Conclusions:

Many corridors are viable for a wide range of mammal body sizes in Iran.
Comprehensive resistance map creation, including species-specific traits and infrastructure, is crucial.
Accurate corridor identification aids in pinpointing critical pinch points and barriers for conservation.