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Some Aspects of Plant and Animal Distribution as Affected by Geologic Formations

出版	Biological Research Station, 1961
URL	http://books.google.com.hk/books?id=0R8AzwEACAAJ&hl=&source=gbs_api

註釋Data were collected at five different geologic areas, and is hereby recorded as the preliminary report of a proposed three year study which is designed to evaluate the quantitative and qualitative differences of various plant and animal populations occurring on different geological formations. At each study area, Macabee gopher traps were set for the mountain pocket gopher, Thomomys talpoides, the animal of study in this research project. The flowers, stems and leaves, and roots of four plants- agoseris, yarrow, lupine and erigeron - were clipped for study. In the field, plant and animal specimens were preserved in a portable home-made dry ice freezer unit, and then transported to a freezer locker in Jackson upon returning to the Station. In addition, vegetation plots 9.6 sq.ft. in area were clipped, rodent traps baited and set, insects collected, core and soil samples taken, and water infiltration studies carried out. Wet weight readings of the vegetation clippings were taken in the field. Upon returning to the Research Station, an oven heated at 65-80 degrees C. was used to determine oven-dry weight, and the average per cent of moisture by weight subsequently ascertained. The core and soil samples collected will be studied to determine texture, physical characteristics, organic and inorganic composition, and soil moisture. The specimens collected will be analyzed at a later date. The preliminary nature of this study necessarily restricts us from making any definite factual conclusions at this time, since most of the data gathered has yet to be studied and evaluated, and it is quite possible that they may not necessarily be representative of actual conditions.