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- Title
LOCAL FACTORS AND COLONIST DISPERSAL INFLUENCE CRUSTACEAN ZOOPLANKTON RECOVERY FROM CULTURAL ACIDIFICATION.
- Authors
Binks, Jessie A.; Arnott, Shelley E.; Sprules, W. Gary
- Abstract
The article investigates the roles of local environmental conditions and dispersal limitation in crustacean zooplankton recovery from acidification in Swan Lake, Ontario, a historically acidified, metal-contaminated lake. Mesocosm and emergence trap experiments were conducted. The preindustrial pH of the lake was estimated to be between 5.6 and 6.1 but sulphur dioxide emissions from nearby smelters caused a reduction in pH to 4.0 in 1977. Three colonist species-C. b. thomasi and S. ore-gonensis and, to a lesser extent,. M. edax-were not affected by the pH treatment in the enclosure experiment but were reduced in abundance by the resident zooplankton community indicating an effect of local biotic conditions. The results suggests that local and regional processes are instrumental in zooplankton community assembly. This indicates that a multifaceted management solution will be required for complete restoration of acidified ecosystems. Recovery of some - taxa, such as Ceriodaphnia and Daphnia, will be affected without further reductions in acid deposition and subsequent increases in take pH.
- Subjects
ONTARIO; ZOOPLANKTON; LAKES; CHEMICAL reactions; ACIDIFICATION; SULFUR dioxide; BIOTIC communities
- Publication
Ecological Applications, 2005, Vol 15, Issue 6, p2025
- ISSN
1051-0761
- Publication type
Article
- DOI
10.1890/04-1726