Turkey Lakes Watershed Study reference list: 1982

Report includes a general description of the TLW (geology, geomorphology, forest type, lake characteristics) and provides information on sampling locations, data being collected, data storage, and preliminary water budget calculations.

Report gives results of an evaluation of a new wet-only collector designed to sample persistent organic chemicals in rain. Details of design and manufacture are included. Data from a TLW sampling site was used in the evaluation.

Report summarizes methodology used and bacterialogical data collected from surveys of lake water and sediments in TLW, May to October 1980. Parallel laboratory studies using batch fermentors are also reported.

Report presents results (data and interpretation) of studies on microbial populations and their activities in lake waters and sediments in the TLW and Kejimkujik Watershed, N.S. Field monitoring and laboratory fermentor experiments are both reported. Bacterial activity was found to be depressed in acid stressed lakes.

Report presents results (data and interpretation) of studies on the microbial populations and their activities in streams in the TLW. Organisms capable of conversion of S and N forms were emphasized. A literature survey on the effects of acidic precipitation on microbial populations is also included. Both field (leaf decomposition) and laboratory (reconstituted column) experiments are discussed. (see 88-24).

Presents results and discussion of studies on lake sediment cores from TLW. Data included profiles of pH, Cu, Ni, Pb, Zn, Al, Mn, and Ca. The distribution and abundance patterns of benthic invertebrates was also assessed.

Report contains absolute pollen frequencies of Acer, Ambrosia, Pinus, and Quercu in 9 lake sediment cores collected from all the lakes in the TLW. Methodology is outlined.

Subbottom profiling of the sediments in Turkey Lake and Little Turkey Lake (and 11 others in eastern Ontario and Quebec) using an acoustic profiler is reported. Profiles showed that many lake bottoms are filled with more than 25 m of lake glacial sediment which is generally covered in turn by up to 5 m of modern gyttja-like lake sediment.

Gives background information on acidic precipitation, potential effects on forests in general and to the forest type in the TLW in particular, and other physical characteristics of the TLW basin.

A brief description of the Great Lakes Forest Research Centre's studies in the TLW.

Report presents results of a survey of 85 headwater lakes in which an attempt is made to recognize relationships which may exist between the well-being of biological communities and chemical status. Biological communities reflected to varying degrees the acidic status of their aquatic habitat. Compared to plankton and benthic organisms, fish provide the most blatant response to changes in their habitat.

Distribution and physical characteristics of both modern and unconsolidated glacial sediments are reported for the material in the bottom of 4 shield lakes including Turkey and L. Turkey Lakes. Three to 5 m of gyttja overlies bedrock and glacial sediments in all but the steepest part of the lake basins. Anomalously high carbonate content in the drift adjacent to the lakes is reported.

Report summarizes daily air concentration and wet-only precipitation data collected in TLW (called "Algoma" in the report). Data is segregated by month and a statistical summary is provided for each month.

Report summarizes causes of acid precipitation and effects on forest soils, namely leaching of basin cations, changes in nutrient availability, and alteration of microbial decomposition. Report is essentially a public information sheet.

Two areas, Algoma and Ranger Lake are discussed in this report. The Algoma component which includes the TLW is designed to establish baseline information on waterfowl breeding and distribution density, so that future effects of acidification can be monitored. The Ranger Lake section (slightly south of the TLW) examines habitat parameters relating to reproductive success in waterfowl and the effects of acid precipitation on that success. Results indicate that headwater systems in Algoma are becoming acidified and this could have adverse effects on waterfowl reproduction.

Trophic relationships in 10 lakes in the Ranger Lake area (south of the TLW in Algoma) were examined to study the effects of acidification on the availability and abundance of waterfowl food. The focus is upon the relationships between macroinvertebrates and fish, and has implications for waterfowl reproductive success. The abundance and diversity of macroinvertebrates was higher in lakes without fish, thus as acid-sensitive fish disappear the selection of wetlands for breeding will change.