Jasper Ridge Biological Preserve - Ecology


In 1922, Cooper asserted that Jasper Ridge was historically chaparral, and cleared in the nineteenth century to open grasslands, primarily Eurasian wild oats (Avena fatua and Avena barbata). However much of the grassland has been replaced by various oaks, especially Coast Live Oak (Quercus agrifolia), and Pacific Madrone (Arbutus menziesii). More recently, the oak/madrone forest is being succeeded by specimens of large Douglas fir (Pseudotsuga menziesii) as in the image above. In addition there are several groves of second growth Coast Redwoods (Sequoia sempervirens) in the preserve, some in large "fairy rings" indicating that trees of immense girth were cut down in the nineteenth century.

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