Project Metadata Quality Assurance + Control Data Archiving

Metal budgets of lakes and catchments on the Precambrian Shield: compartment sizes and fluxes between compartments (Processes)

Objectives being Investigated
1. Establish the metal levels in compartments and the fluxes between compartments in a catchment that is not impacted by local point sources of metals
2. Evaluate the role of long-range transport vs. internal sources (weathering) of metals

Study/Sampling Design

• a small oligotrophic lake (Plastic Lake) on the Precambrian Shield in Haliburton County, Ontario, and its catchment basin constitute the study site
• input of metals from the atmosphere is measured as bulk and wet-only deposition
• the pool size in the forest vegetation (9 tree species, bark, wood, foliage, branches, roots), the upland soils (Lfh, Ae, B, C horizons), the shallow groundwater, the upland stream, the wetland, the lake inflow, the lake, the lake sediments, and the lake outflow are measured
• changes in flux as precipitation passes through the canopy are measured as throughfall, transport from the forest to the soil is measured as litterfall
• changes in metal transport as water moves through the soil column are measured using lysimeters
• the aqueous concentration data are combined with hydrology data to calculate fluxes through the catchment and into and out of the lake
• the storage in the lake sediments is measured via dated sediment cores
• total and soluble (<0.45 um) metals are measured
• Pb isotopes are used to estimate natural vs anthropogenic sources, and to estimate weathering rates
  

Location of Field Site(s)
Plastic Lake, 45° 11’ N; 78° 05’ W

Biota Studied

Species
Metal pools in 9 tree species are measured (not toxicological work)

Metals, etc. Quantified
Cu, Ni, Zn, Pb, Cd, Al, V, Cr, Mn, Fe, Co, As, Rb, Sr, Tl, Bi, U, Na, Mg, Ca, K, Li

Biological Endpoint(s)
--- none provided ---

Physical Material(s) Studied

Medium/Media
Lake, stream, wetland and groundwater
Soil, vegetation, lake sediments

Metals, etc. Quantified
Cu, Ni, Zn, Pb, Cd, Al, V, Cr, Mn, Fe, Co, As, Rb, Sr, Tl, Bi, U, Na, Mg, Ca, K, Li, Ba (water only)

Bibliographic References on-file with Secretariat: No

Data Available: Yes

Data Archived with MITHE-SN: No