Todd Keeler-Wolf

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Todd Keeler-Wolf is a California botanist and ecologist who co-developed the "Sawyer and Keeler-Wolf classification system" of vegetation types. [1]

He is Senior Vegetation Ecologist at the California Department of Fish and Game and headed the Vegetation Classification and Mapping Program. He was Program Director of the California Native Plant Society’s Vegetation Program. He is the author of numerous books and academic publications. He wrote Introduction to California Plant Life with Robert Ornduff and Phyllis M. Faber, and co-edited Terrestrial Vegetation of California with Alan A. Schoenherr and Michael Barbour.

Selected publications

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<span class="mw-page-title-main">Vegetation</span> Assemblage of plant species

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Robert Ornduff (1932–2000) was an American botanist. He was Director of the University and Jepson Herbaria, Director of the University of California Botanical Garden, Executive Director of the Miller Institute for Basic Research in Science, and Chair of the (former) Department of Botany and Professor of Integrative Biology at the University of California at Berkeley. Botanist Phyllis M. Faber said of him following his death, "his extensive knowledge and love of the California flora remains unmatched."

Allan A. Schoenherr was a Californian author, ecologist, and naturalist. He is the author of the widely used reference book, A Natural History of California.

Michael G. Barbour was a Californian botanist and ecologist. He was a Professor Emeritus at the University of California, Davis. His fields of expertise were in autecology and synecology of plants and vegetation in stressful environments, including marine strand, tidal salt marsh, vernal pools, warm desert scrub, mixed evergreen forest, oak forest, and montane conifer forest. This research was conducted in Alta and Baja California along the Pacific coast of North America, on the Gulf of Mexico coast, in northwestern Argentina, in southern Australia, in coastal and arid parts of Israel, in mountains of central-to-northern Spain, in mountains of the Canary Islands, and in mountains of Coast Range and Sierra Nevada of California.

The Sawyer and Keeler-Wolf classification system is an evolving system of classification of vegetation types, plant communities, or floristic characterization. It was first developed in 1995 by John O. Sawyer and Todd Keeler-Wolf for the California Native Plant Society, in the mission to classify all vegetation in California. Particular attention was paid to recognizing rare types that were "lumped" into general categories in previous systems, such as the Munz and Keck classification system, Chetham and Haller classification system, and Holland classification system. It uses constantly updated quantitative measurements of both species diversity and cover to define its types. It intended to be evolving and to continue to be refined.

<span class="mw-page-title-main">Sycamore Alluvial Woodland</span>

Sycamore Alluvial Woodland is a rare open woodland plant community, or vegetation type, dominated by California sycamore Platanus racemosa, existing only in small parts of California. It exists only in small areas of California in the foothills of the southern Sierra Nevada range and the California Coastal Range. It is rare as a plant community, even though California sycamore is a common component of other vegetation types where it is not dominant. It exists at the base of flat valleys having deep alluvial gravel, where water from the hills hit the flat valley floor having an intermittent stream and large seasonal fluctuations in the water table. It is a habitat type defined by broad-leafed woodland and stable levels of groundwater. Sycamore Alluvial Woodland is identifiable through open savanna riparian structures, with wide floodplains.


    • Introduction to California Plant Life, Robert Ornduff, Phyllis M. Faber, Todd Keeler-Wolf, California Natural History Guides No. 69, University of California Press, Ltd., 2003, ISBN   978-0-520-23704-9, pages 114, 138–9
    • Santa Margarita River Recharge and Recovery Enhancement Program, United States Bureau of Reclamation,
    • Biological Resources Report, Elder and Plunge Creek Project, San Bernardino County Department of Public Works Environmental Management Division,
    • Placer County Natural Resources Report, Chapter 2: Methods, 2004
    • Todd Keeler-Wolfe bio, California Native Plant Society