. Bio-ecology. Plant ecology; Animal ecology; Botany; Ecology; Zoology. 74 REACTION: THE INFLUENCE OF COMMUNITY ON HABITAT (1907), or about 1 to each 3 square centimeters. Since many species produce several generations in a year and others do not appear in the summer aspect at all, the total number annually must be much larger, probably reaching 1 or 2 per scjuare centimeter. It seems probable that the contribution made by excreta is more evenly distributed in general than the bodies of animals, though just. Fig. 15.—Diagram of a typical den of the banner-tailed kangaroo rat (Dipo- domys spect
. Bio-ecology. Plant ecology; Animal ecology; Botany; Ecology; Zoology. 74 REACTION: THE INFLUENCE OF COMMUNITY ON HABITAT (1907), or about 1 to each 3 square centimeters. Since many species produce several generations in a year and others do not appear in the summer aspect at all, the total number annually must be much larger, probably reaching 1 or 2 per scjuare centimeter. It seems probable that the contribution made by excreta is more evenly distributed in general than the bodies of animals, though just. Fig. 15.—Diagram of a typical den of the banner-tailed kangaroo rat (Dipo- domys spectabilis Mer.). Double shading indicates where one portion of tunnel lies above another and solid black a three-story arrangement; A, B, C, etc., active openings to surface; N, nest chamber; S, storage; OS, old storage; Y, probably an old nest chamber; Z, old, unused, or partially plugged openings. (After Vorhies and Taylor, 1922.) as little is known of its amount, apart from guano and similar deposits. A large ungulate will distribute a considerable amount of excrement in the course of a lifetime, as the "buffalo chips" of the Great Plains demonstrate, but the absence of accumulation renders this much less conspicuous than in the rookeries of birds, bats, etc. Concentration also occurs in respect to many rodents, especially in relation to sani- tation, and the intensity of the reaction can be estimated from pellet. 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 Clements, Frederic E. (Frederic Edward), 1874-1945; Shelford, Victor E. (Victor Ernest), b. 1877. New York, J. Wiley & Sons, inc. ; London, Chapman & Hall, limited
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