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Ecological Applications, 21(4), 2011, pp. 12411256 2011 by the Ecological Society of America
 

Summary: Ecological Applications, 21(4), 2011, pp. 12411256
2011 by the Ecological Society of America
Does dispersal limitation impact the recovery of zooplankton
communities damaged by a regional stressor?
DEREK K. GRAY
1
AND SHELLEY E. ARNOTT
Department of Biology, Queen's University, 116 Barrie Street, Kingston, Ontario K7L 3J9 Canada
Abstract. The acidification and ongoing pH recovery of lakes in Killarney Provincial
Park, Canada, provide a unique opportunity to increase our understanding of the role of
dispersal as communities respond to environmental change. Time lags in community recovery
following pH increases in acidified lakes have typically been attributed to local factors;
however, no studies have been conducted to determine if colonist availability could also play a
role. Moreover, the rates and mechanisms of dispersal to recovering lakes are poorly
understood. In this study, we sought to determine if dispersal limitation could impede the
recovery of zooplankton communities affected by a regional stressor. To achieve this
objective, we used a combination of empirical data collection along with spatial modeling and
variation partitioning techniques. Data were collected by measuring dispersal to four
recovering lakes in Killarney Park. Dispersal traps were placed next to lakes to measure
immigration overland, drift nets were used to measure immigration via streams, and in situ

  

Source: Arnott, Shelley - Department of Biology, Queen's University (Kingston)

 

Collections: Environmental Sciences and Ecology; Biology and Medicine