The Water Quality of Lochaber Lake Past, Present and into the Future Prepared by Leslie Buckland-Nicks, John Lamb and Michael Arnott Lochaber Community Development Association 1281 Highway 7 RR # 5 Antigonish, Nova Scotia, B2G 2L3
[email protected] March 2013 Supported by Funding from The Government of Canada Summer Jobs 2012 Program; RBC Blue Water Project Community Action Grant; Dr. Barry Taylor, Department of Biology, St. Francis Xavier University; the Lochaber Community Development Association 1 Contents 1. Executive Summary 4 2. Acknowledgements 7 3. Introduction 8 a. Project Background 8 b. Lochaber Lake: A Portrait 9 c. Historic Context 13 d. Water Quality Studies Prior to 1994 14 e. The 1994 Study 15 4. The 2012 Study 16 a. Parameters measured 16 b. Site selection 20 c. Methods and Analysis 21 d. Results and Discussion 22 e. Comparison of 2012 and 1994 Findings 29 f. Conclusions from the Study 31 5. Issues Arising from the 2012 Study 32 a. Sources of Harmful Inputs 32 b. Carrying Capacity of the Lake 38 c. The Future of Fish Resources 40 6. Community Based Monitoring and Stewardship 41 7. Recommendations 44 8. Literature Cited 46 9. Appendices 49 A. Methods and Analysis 49 B. Tables 51 C. General Chemistry 60 D. Dr Barry Taylor’s Plankton Analysis 61 E. The Project Team 63 2 List of Tables Table 1. Characteristics of lakes of different trophic levels (modified from Wetzel 1983). 16, 51 Table 2. Range of acceptable levels for selected lake parameters. 17, 51 Table 3. Sampling sites on Lochaber Lake with description and geographic coordinates.