. The Canadian field-naturalist. 1969 Weller, Trauger and Krapu: Birds of Great Slave Lake 357. LOON G. SCAUP MALLARD PINTAIL MERG. N. PHALAROPE P. JAEGER CALIF. GULL HERRING GULL MEW GULL ARCTIC TERN CASPIAN TERN SAV. SPARROW SONG SPARROW SPARROW Figure 9. Interspecific relationships of species as shown by species found nesting on the same island. Species diversity and island size The diversity of birds on any land mass seems generally more directly related to the size of that mass than to distance from the mainland source of pioneers (MacArthur and Wilson, 1967: 20-23). Becaus
. The Canadian field-naturalist. 1969 Weller, Trauger and Krapu: Birds of Great Slave Lake 357. LOON G. SCAUP MALLARD PINTAIL MERG. N. PHALAROPE P. JAEGER CALIF. GULL HERRING GULL MEW GULL ARCTIC TERN CASPIAN TERN SAV. SPARROW SONG SPARROW SPARROW Figure 9. Interspecific relationships of species as shown by species found nesting on the same island. Species diversity and island size The diversity of birds on any land mass seems generally more directly related to the size of that mass than to distance from the mainland source of pioneers (MacArthur and Wilson, 1967: 20-23). Because the West Mirage Islands form a tight cluster, distance to mainland was not analyzed. But an analysis of relative area of islands and breeding birds was made (Figure 11). The resulting plot provided only a suggestion of an increase in numbers of breeding birds with increased area but a stronger relationship exists between species of birds sighted and area of the islands. Unfortunately, sample size of larger islands was small (see data on frequency of occurrences in Figure 11). In general, larger land masses have greater habitat diversity, and pre- sumably this is the cause of the larger number of avian species. An effort \\ as made to compare wooded and nonwooded islands of equal size but the sample sizes of large unwooded islands and small wooded islands were small. In the. 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 Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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