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Found 10 records similar to Common loons - Kejimkujik
Brook trout are top predators in aquatic ecosystems at Kejimkujik that integrate the effects of stressors throughout the aquatic trophic structure. They are sensitive to a variety of stressors, including acidification, changes in water quality, climate change, fishing pressure, exotic species introductions, trophic structure alterations, land use change, and watershed fragmentation. The monitoring program tracks Brook trout population status, as assessed by relative abundance and trout condition at two watersheds in Kejimkujik. Volunteer anglers record morphometric and catch per unit effort data during the months of April, May and June for 3 years in a row every 5 years.
The number of common loons and their breeding range have decreased significantly since the beginning of the century. There is concern about the number of breeding pairs and the number of fledglings. In order to determine what the population status is throughout La Mauricie National Park, loons are monitored through two aerial surveys carried out over all the lakes in the park of more than three hectares as well as by canoe on the most accessible lakes in order to confirm the presence of loons and locate their nests.
The hydrological regime of a stream plays a critical role in determining the biodiversity and ecological processes of aquatic, wetland and riparian ecosystems. As a result, hydrological characteristics provide important information on the integrity of freshwater systems and how they may be changing over time. The monitoring program assess and detect changes in a Streamflow Index of key hydrological measures in major transboundary watersheds at Kejimkujik. Stream water level is recorded hourly using in-situ water level data loggers.
Kejimkujik National Park, in Nova Scotia, Canada, is a sensitive region for heavy metal contamination, such as mercury, in part due to long-range atmospheric deposition from global and regional industrial regions. The region is remote from industrial centres, but is downwind of major pollution sources in North America and Canada, and historically had numerous gold mining sites. The region has also experienced anthropogenic acidification from sulphate deposition over the 20th century, which has resulted in limnological conditions favourable for mercury (Hg) methylation within Kejimkujik lakes. Kejimkujik is therefore known to be a hotspot for methylmercury (MeHg) bioaccumulation and biomagnification, with the highest mercury concentrations detected within common loon (Gavia immer) populations across Canada and North America.
The European Green crab is a pan-global invasive exotic species. Its detrimental effects are well documented, including effects on eelgrass and soft-shelled clams and have defined the species of crab as an 'ecosystem engineer'. A population control program was initiated in 2009 whereby modified shrimp traps are used to remove as many green crabs from Kejimkujik's estuaries as possible. These management efforts are evaluated through standardized monitoring whereby 14 traps are deployed for the same period of time in the same place annually.
ADMINISTRATIVE MAP PLAN OF DECLARED WILDERNESS AREA PARCEL DWA-1 KEJIMKUJIK NATIONAL PARK OF CANADA COUNTIES OF QUEENS, DIGBY AND ANNAPOLIS
Lichen abundance was selected as a measure of stress in forest ecosystems because lichens are well-established bioindicators and have been used for monitoring air pollution globally for many years. They are particularly sensitive to changes in their environment. Lichen species vary in their sensitivity to pollutants, and as a result by monitoring the assemblage and abundance of different species, we can obtain a measure of the prevailing air quality. This monitoring work is performed in Kejimkujik once every 5 years using field observations from trained Lichenologists.
The effects of climate warming, eutrophication, air pollutant inputs and forestry activity that occurred before La Mauricie National Park was created influenced and continue to influence today water quality in the park. These stress factors threaten the natural evolution of aquatic ecosystems. On several small lakes, the quality of the habitat has not ensured the maintenance of the eastern brook trout population and has decreased the beaver population. In order to monitor the aquatic ecosystems, sampling of a number of predetermined lakes is being carried out and water quality is being measured by evaluating parameters related to acidification, eutrophication, general water quality, and oxygen and temperature conditions.