Mammal Surveys of the Lower Arroyo Seco Park, Pasadena, California and of Millard Canyon, Altadena, California
Koler, Janice A.
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This paper presents the results of a mammal inventon." of the Lower <br /><br />-Ajtovo Seco Park, Pasadena, California and of a similar but less disturbed com- <br /><br />parison site. Millard Canyon, -AJtadena. California. Results indicated that in com- <br /><br />parison the Lower .Ajtovo Seco Park has v,ithin a few decades experienced a <br /><br />moderate loss of mammal species rabbit size and larger and a severe loss of smaller <br /><br />species. Local species extinctions are attributed mainly to the loss of plant as- <br /><br />sociations required by habitat- specific species for foraging and shelter, and sec- <br /><br />ondarily to possible interspecific competition of mouse sized mammals v,ith pock- <br /><br />et gophers.