Natural hybridization between Malacothrix polycephala W . Davis (ined.), an annual, and M . incana (Nutt.) Torrey & A. Gray, a perennial, on San Nicolas Island, California was examined using herbarium studies, studies in the field, and studies of plan . . .

Major-oxide and trace-element compositions of middle Miocene volcanic rocks from north Santa Cruz and Anacapa Islands are very similar. In contrast, they are geochemically distinct from the volcanic clasts from the Blanca Formation, of similar age but . . .

The striking development in the 9,500 year adaptation of the maritime culture to San Clemente Island is the increasing-importance of kelp bed fishing. This evolution can be traced through faunal and artifact records. The artifact assemblage has been c . . .

This paper constitutes the second investigation of the lichens of Santa Barbara Island. The collections made on the island by Blanche Trask in 1901-1902 were previously reported by Hasse (1903a-d, 1913). The known lichen flora is increased from 22 to . . .

The carbonized vegetation associated with Pleistocene "fire areas" and mammoth and bird fossils on the Northern Channel Islands has been attributed to wildfires and to the cooking of mammoths by humans. This paper elaborates on the hypothesis (Cushing . . .

Present populations of black abalone (Haliotis cracherodii Leach) at Santa Cruz Island, California are presently dense, up to 90/m^2. Examination of shell middens created by Chumash Indians suggests that such high present-day densities may have develo . . .

Research on San Nicolas Island prehistory currently describes an aboriginal maritime adaptation which appeared about 6,800 years ago. Faunal data from the stratified site of SNI-11 indicate an early procurement strategy dominated by shellfish gatherin . . .

Despite the importance of fire in the maintenance of chaparral and closed-cone pine forests on the mainland, there have been only three documented lightning-caused fires in such habitats on the islands during the past 140 yr. We examine evidence for p . . .

Natural hybridization between Malacothrix polycephala W . Davis (ined.), an annual, and M . incana (Nutt.) Torrey & A. Gray, a perennial, on San Nicolas Island, California was examined using herbarium studies, studies in the field, and studies of plan . . .

Certain archaeological sites on the northern Channel Islands dating between ca. 4,500 and 7,500 B.P. contain unusually high frequencies of red abalone (Haliotis rufescens) shells. Assuming that aboriginal peoples living at these sites collected shellf . . .