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Bryophyte responses to microclimatic edge effects across riparian buffers
Katherine J Stewart1, Azim U Mallik
1Biology Department, Lakehead University, Thunder Bay, Ontario, Canada.
Summary
Riparian buffers in Canada
Area of Science:
- Forest ecology
- Boreal forest research
- Riparian zone management
Background:
- Riparian buffers are crucial for boreal forest management.
- Habitat conditions within buffers are poorly understood due to complex edge effects.
- Edge effects originate from both clearcut areas and stream proximity.
Purpose of the Study:
- Investigate microclimatic conditions and bryophyte responses within riparian buffers.
- Assess the growth and vitality of two moss species (Hylocomium splendens and Polytrichum commune).
- Determine the relationship between microclimatic gradients and bryophyte health.
Main Methods:
- Transplanted two moss species (Hylocomium splendens, Polytrichum commune) along 60-m transects.
- Measured microclimatic parameters and bryophyte growth, cover, and vitality.
- Established transects from stream edge into undisturbed forest and clearcut sites.
Main Results:
- Both moss species responded to microclimatic changes.
- Vapor pressure deficit (VPD) significantly impacted H. splendens growth.
- Soil moisture was the primary factor for P. commune growth.
Conclusions:
- Interior forest bryophytes like H. splendens can indicate edge effects and biodiversity recovery.
- Bryophyte vitality reflects near-ground microclimatic conditions at forest edges.
- Abundance of specific bryophytes can quantify edge effect depth for buffer management.
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