. Bulletin. Science. 2 3 4 5 6 Human Impact o 40 n ^ 35 ^ 30 ^ â £ 25 .[if 20 - I V- 15 - <u 10 - 5 - 0 1-None 2-Organic Humus 3-Leaves/Sticks 4-Logs/Branches 1-No Bare Soil 2-50% Bare Soil 3-100% Bare Soil. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy

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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectscience