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Resource-Area-Dependence Analysis: Inferring animal resource needs from home-range and mapping data.
Robert E Kenward1, Eduardo M Arraut2,3,4,5, Peter A Robertson6
1Centre for Ecology & Hydrology, Wallingford, Oxfordshire, United Kingdom.
Plos One
|October 26, 2018
Summary
A new method, Resource-Area-Dependence Analysis (RADA), estimates animal resource needs by analyzing home-range size and habitat maps. This tool helps understand habitat use and resource requirements for species like squirrels and buzzards.
Area of Science:
- Ecology
- Wildlife Biology
- Spatial Analysis
Background:
- Animal home-range size is influenced by resource availability in heterogeneous landscapes.
- Estimating home-range size and mapping key resources are crucial for understanding habitat use.
Purpose of the Study:
- To introduce a novel method, Resource-Area-Dependence Analysis (RADA), for inferring animal resource requirements.
- To quantify the minimum area of specific habitat types needed by animals within their home ranges.
Main Methods:
- RADA utilizes telemetry data and categorical habitat maps to identify resource locations and estimate required areas.
- The method was applied to radio-tracked data of red squirrels, gray squirrels, and common buzzards in southern England.
Main Results:
- Red squirrels require approximately 0.48 ha of pine wood; gray squirrels need 0.34 ha of deciduous woodland and wheat.
- Common buzzards utilize 0.54 ha of rough ground and 14 ha of meadow, with some also using suburban land.
Conclusions:
- RADA is an effective tool for inferring critical resource needs and habitat use patterns in wildlife studies.
- The method provides quantitative estimates of habitat area essential for animal survival and reproduction.
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