CalJep: A spatial distribution database of CalFlora and Jepson plant species
Joshua H. Viers, Department of Environmental Science & Policy, University of California, Davis
James H. Thorne, Department of Environmental Science & Policy, University of California, Davis
James F. Quinn, Department of Environmental Science & Policy, University of California, Davis

Download the Paper (PDF format) - February 2006 Related Files: CalJepTables4-10_Viers.xls (214 kB) CalJep Tables CalJepMaps1-3.pdf (1880 kB) CalJep Maps 1-3 CalJepMaps4-9.pdf (6766 kB) CalJep Maps 4-9 CalJepMaps10-12.pdf (2511 kB) CalJep Maps 10-12 CalJepMaps13-15.pdf (2517 kB) CalJep Maps 13-15 CalJepMaps16-18.pdf (2503 kB) CalJep Maps 16-18 CalJepMaps19-23.pdf (4395 kB) CalJep Maps 19-23 CalJepMaps24-25.pdf (2105 kB) CalJep Maps 24-25 CalJepMaps26-27.pdf (1742 kB) CalJep Maps 26-27 CalJepMaps28.pdf (1693 kB) CalJep Map 28 The CalJep Geodatabase is available for download at http://cain.nbii.org/regional/caljep/CalJepGeoV1.zip This file is supplemental file to the paper and is a 200 MB Microsoft Access file. Be aware that you may experience long download times due to its large file size. Tell a colleague about it. Download Adobe Reader: Access to internal hyperlinks requires the full version of Adobe® Acrobat® 7.0. If you do not have this version, some internal hyperlinks may not work. This work has been peer reviewed.

ABSTRACT:
CalJep is a spatially enabled database that reconciles or cross-walks the two prominent electronic plant distribution lists for California: CalFlora and Jepson. We intersected the distribution information from the two data sources to create a refined spatial distribution repository that can be used to examine patterns of plant diversity, distribution ranges of individual plant species or infrataxa, or vegetation associations. These data will allow scientists and resource managers to examine potential range maps for non-native plants, create range maps for plant species of restoration interest, and corroborate lines of evidence for determining appropriate management and conservation activities. We present here a detailed description of the methods used to create the CalJep geodatabase, data rendered from its creation, and a discussion of its applicability to a wide range of biogeographical and ecological questions, including restoration planning and adaptive management for the Bay-Delta ecosystem. CalJep records 7,887 plant species, subspecies, and varieties mapped onto 228 ecological subunits with corresponding distributional information for vascular plant species at varying levels of confidence. Information derived from this geodatabase is inherently as accurate as the digital floras used to create it; hence, its utility is best realized when implemented at the regional or statewide scale. CalJep provides a previously unavailable service to vegetation science in California and to resource managers operating within the Bay-Delta ecosystem.