The preferred habitats and life histories of two bog ericads, Andromeda glaucophylla and Kalmia polifolia.

Observational data on vegetational communities and water levels, plus pH measurements show that the small-scale distribution of Andromeda glaucophylla and Kalmia polifolia results from chemical and moisture gradients within a given bog. Zonation occurs on the microhabitat scale of hummock and hollow and on the larger scale of surrounding forest to bog mat to lake edge. As Crum (1988) observed, even on a hummock-scale, zonations of bryophytes and bryophyte succession create habitats of differing suitability for Kalmia and Andromeda. The effects of vegetation on the pysical environments makes a sort of bog-within-a-bog effect: small areas take on their own unique chemical and hydrological properties, so influencing the communities of flora which can colonize and thrive on that spot.http://deepblue.lib.umich.edu/bitstream/2027.42/54496/1/2934.pdfDescription of 2934.pdf : Access restricted to on-site users at the U-M Biological Station

South Fishtail Bay Douglas Lake.

South Fishtail Bay of Douglas Lake, Cheboygan County, Michigan was sampled for evaluation on June 30, 1993 as part of the Limnology class Comparative Lake Survey. Dissolved oxygen, temperature, pH, and conductivity profiles were constructed for the limnetic zone. Water from the epilimnion, metalimnion, and hypolimnion was evaluated for hardness, alkalinity, ammonia, nitrate, silica, phosphorus, and heavy metals. A light profile was constructed for the limnetic zone and water samples in the upper, middle, and lower euphotic zone were analyzed for chlorophyll-a content. Vertical and horizontal plankton tows were made and phytoplankton and zooplankton communities were evaluated. In the littoral zone, macrophytes, invertebrates, and fish were collected for identification and community analysis. The results of this survey indicate that Douglas Lake is a meso-eutrophic lake.http://deepblue.lib.umich.edu/bitstream/2027.42/54411/1/2848.pdfDescription of 2848.pdf : Access restricted to on-site users at the U-M Biological Station