Using a GIS model to assess terrestrial salamander response to alternative forest management plans

Area of Science:

• Ecology
• Conservation Biology
• Geographic Information Systems (GIS)

Background:

• Terrestrial salamanders are sensitive indicators of forest ecosystem health.
• Predicting species abundance is crucial for effective forest management and conservation planning.

Purpose of the Study:

• To develop and validate a GIS model for predicting terrestrial salamander abundance.
• To assess the impact of different forest management strategies on salamander populations.

Main Methods:

• A GIS model was created using topography and forest age data.
• Model predictions were validated against field-sampled salamander abundance data.
• A timber-harvest simulator (HARVEST) projected forest changes over 150 years under various management scenarios.

Main Results:

• The GIS model showed a significant ability to predict salamander abundance and biomass.
• Projected salamander abundance was more sensitive to harvest rate than to management area delineation.
• Management alternatives influenced the distance salamanders would need to travel to colonize new habitats.

Conclusions:

• GIS modeling provides a valuable tool for evaluating the ecological impacts of forest management alternatives.
• Harvest intensity is a key factor influencing salamander populations in managed forests.
• Understanding spatial dynamics is essential for conserving sensitive species like terrestrial salamanders.