Air-Pollution-Mediated Changes in Alpine Ecosystems and Ecotones.

Area of Science:

• Ecology
• Environmental Science
• Soil Science

Background:

• Long-term research in Tatra National Park reveals ecosystem sensitivity to acid deposition.
• Alpine and subalpine zones are particularly vulnerable to industrial air pollution.
• Previous studies in other Central European mountains show spruce forest dieback due to pollution.

Purpose of the Study:

• To assess the impact of acid deposition on alpine, subalpine, and spruce forest ecosystems and ecotones.
• To document changes in soil biological and chemical parameters, and plant communities since 1977.
• To investigate the potential of monitoring alpine changes for predicting broader environmental impacts.

Main Methods:

• Long-term monitoring of soil biological parameters (Collembola), soil types, chemical parameters (pH, humus), and plant communities.
• Analysis of ecosystem and ecotone changes in alpine, subalpine, and spruce forest zones.
• Comparison of ecosystem changes on limestone versus granite bedrock.
• Utilizing remote-sensing methods to detect changes in ecosystem extent.

Main Results:

• Significant soil pH decrease and leaching of humus substances observed in sensitive alpine grasslands.
• Changes in ecosystem parameters were more extensive on limestone than on granite.
• Shifts in soil animal community composition, with some species disappearing and others becoming dominant.
• Substantial changes in ecosystem aerial extent and ecotone boundaries detected since 1977.

Conclusions:

• Alpine ecotones and ecosystems exhibit high sensitivity to long-distance transported acid deposits.
• Detected alterations in alpine zones may foreshadow similar impacts in subalpine and forest belts.
• Monitoring high-altitude ecosystem changes can serve as an early warning system for acidification and global change effects.
• Changes in specific ecosystem extents can predict consequences of global climate change.