Turkey Lakes Watershed Study reference list: 1990

Paper presents a design for a volume recorder to measure large volumes of water from lysimeters. The unit is compact, portable, and inexpensive, and can be used at year-round field locations.

Two sites in the old-growth forest stand were compared with respect to total phytomass values and element concentrations. Growth processes are still influencing nutrient uptake, and weathering replenishes losses from the systems.

It is estimated that 390,000 lakes in eastern Canada are sensitive to acidification. Although fish losses are documented for Sudbury and Nova Scotia, acidification is probably more wide-spread. Recovery of fish populations and a rise in pH in Sudbury and Algoma lakes show that recovery is possible. Fish community responses depend on a variety of factors, making losses difficult to document. Reduction of acidifying pollutants is the recommended solution to the problem.

Chaoborid and chironomid (Diptera) fossils in sediments of 9 Ontario Precambrian Shield lakes indicate that 4 fishless lakes were historically fishless, while four had fish in the past. One of them was periodically fishless. Chironomid fossil associations are substantially different in historically fishless and inhabited lakes. Fish reappeared in 2 lakes in which alkalinity and pH made a recovery. Diptera associations are shown to be valuable indicators for the historical status of fish in acidified lakes.

A major assessment report. Acid rain has been monitored across Canada at many stations, including TLW, from 1980. Various mathematical models have also been developed over this period. Seasonal trends are documented.

A major assessment report. The effects of acid rain on Canadian aquatic systems have been monitored since 1980. Results of the survey which include TLW are assessed.

A major assessment report. Results of a 10-year monitoring of the effects of acid rain on Canadian terrestrial systems are assessed. The TLW is included in the survey.

Data from the Turkey Lakes Watershed were used to calibrate and confirm a hydrogeochemical model. The model reflects the role of hydrology in watershed acidification, with special linkage to soil and water chemistry, and contributes to the understanding of hydrogeochemical regimes in acidified Canadian watersheds.

A stochastic model for predicting the probability distribution of the frequency, duration, and magnitude of acidic episodes was applied to stream data from the Turkey Lakes Watershed and Mersey River in Kejimkujik Park, SW Nova Scotia. The model predicts that the maximum frequency of acidic episodes is three per year, 50% of which endure less than 15 days. The model can be used on any watershed affected by acid rain.