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Similar resilience attributes in lakes with different management practices
Didier L Baho1, Stina Drakare1, Richard K Johnson1
1Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Uppsala, Sweden.
Plos One
|March 13, 2014
Summary
Liming acidified lakes increases phytoplankton diversity but does not restore resilience. Limed lakes remain a degraded state, highlighting the need for better ecosystem management strategies.
Area of Science:
- Aquatic ecology
- Environmental science
- Ecosystem resilience
Background:
- Liming is a common method to counteract lake acidification.
- Limed lakes often revert to acidified conditions after management stops, indicating low resilience.
- Understanding resilience attributes is crucial for evaluating liming effectiveness.
Purpose of the Study:
- To assess phytoplankton community metrics, structure, and resilience in limed, acidified, and circum-neutral lakes.
- To evaluate the impact of liming on lake ecosystem resilience.
- To explore the use of multivariate time series modeling for assessing restoration outcomes.
Main Methods:
- Phytoplankton community metrics (diversity, richness, evenness, biovolume) and structure were analyzed.
- Multivariate time series modeling was used to identify temporal frequencies and assess resilience attributes.
- Resilience was evaluated using cross-scale and within-scale structure, and the dynamics of stochastic species.
Main Results:
- Liming enhanced phytoplankton diversity and richness.
- Multivariate community structure differed between limed and other lake types.
- Resilience attributes were similar across lakes, but stochastic species contribution was higher in acidified and limed lakes.
Conclusions:
- Limed lakes represent a specific condition of acidified lakes, not a full restoration.
- Liming does not shift lakes out of a degraded state, explaining limited long-term recovery.
- Time series modeling can quantify ecosystem resilience and assess restoration management efficacy.
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