. An ecological survey of Isle Royale, Lake Superior. Animal ecology; Botany; Zoology; Plant ecology. 78 MICHIGAN SURVEY, 1908. through the tamarack swamp and peat bog; second, through the gravel beach and arbor vitae swamp; third, through the rock beach and Gladonia clearings. Physiographic forces have some direct part in causing the successive changes in ecological factors, but most of them are due to the retroaction of the vegetation upon the habitat. The first stages of the series are marked by a severity of conditions which limit the fauna to a few well adapted species. The intermediate s
. An ecological survey of Isle Royale, Lake Superior. Animal ecology; Botany; Zoology; Plant ecology. 78 MICHIGAN SURVEY, 1908. through the tamarack swamp and peat bog; second, through the gravel beach and arbor vitae swamp; third, through the rock beach and Gladonia clearings. Physiographic forces have some direct part in causing the successive changes in ecological factors, but most of them are due to the retroaction of the vegetation upon the habitat. The first stages of the series are marked by a severity of conditions which limit the fauna to a few well adapted species. The intermediate stages have generally a wide variety of conditions, leading to the development of a varied fauna. The most noteworthy in this respect is the fauna of the Gladonia clearings. The ultimate or climax stage is homogeneous because of the dominance of a few species, and the fauna is again lim- ited to a few well adapted species. , i^ke. }. Original Inland Lake Roek Be ash. Hook Clearing Jaok Pine Birch - Aspen ^ Beach Pool Grovel Beach Tamarack-Arbo Vltao Swamp. Intermediate Climax. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Adams, Charles Christopher, 1873-; Gleason, Henry A. (Henry Allan), 1882-1975; McCreary, Otto; Peet, Max Minor; University of Michigan. University Museum; Michigan. Geological Survey. Lansing, Mich. , Wynkoop Hallenbeck Crawford Co. , State Printers
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