Faculty Profile


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    Janet Franklin

    Professor of Biology
    Adjunct Professor of Geography

    Ph.D., Geography, University of California,
    Santa Barbara (1988)

    Ecology Doctoral Program
    Ecology Masters Program

    Email:  janet@sciences.sdsu.edu

    Lab Web Page



Research Interests:

My research interests include, landscape ecology, plant ecology, biogeography, biophysical remote sensing, digital terrain analysis, and geographic information science.  I have developed techniques for biophysical and floristic vegetation mapping based on classification and machine learning methods using remotely sensed and digital terrain data and geographic information systems.  I have conducted research on the dynamics and spatio-temporal patterns of woody plant communities in the Mediterranean-climate chaparral and conifer forest ecosystems of California, in arid regions of North America and West Africa, and in the tropical forests of remote Oceania. I am currently interested in the following research areas: a) incorporating spatial effects into statistical models predicting species distributions from environmental variables using modern regression methods (generalized additive and linear models, decision trees); b) exploring the impacts of anthropogenically-altered fire regimes on southern California vegetation communities using spatially explicit landscape simulation models and long-term datasets (historical vegetation surveys); and c) understanding the long term impacts of human and natural disturbance on tropical forest ecosystems in the Pacific islands, especially West Polynesia.

Recent Publications (Last five years)

Franklin, J, A. D. Syphard, H. He and D. Mladenoff, The effects of altered fire regimes on patterns of plant succession in the foothills and mountains of southern California, Ecosystems accepted 9/04.

Syphard, Alexandra D., Keith Clarke and Janet Franklin, Using a cellular automaton model to forecast the effects of urban growth on habitat pattern in southern California, Ecological Complexity accepted 7/04.

Akçakaya, H. Reşit, Janet Franklin, Alexandra D. Syphard, and John Stephenson, Viability of Bell's Sage Sparrow (Amphispiza belli ssp. belli) under altered fire regimes, Ecological Applications accepted 6/04.

Syphard, A. D. and J. Franklin, 2004. Spatial aggregation effects on the simulation of landscape pattern and ecological processes in southern California plant communities, submitted to Ecological Modelling vol. 180, no. 1, pp. 21-40. Special Issue; accepted 1/4/04.

Franklin, J., C. Coulter and S. J. Rey, 2004, Change over 70 years in a southern California chaparral community related to fire history, Journal of Vegetation Science vol. 15, no. 15, pp. 701-710.

McConkey, K. R., D. R. Drake, J. Franklin, and F. Tonga, 2004, Effects of Cyclone Waka on fruit bat populations in Tonga, Journal of Tropical Ecology vol. 20, no. 4, pp. 555-561.

Franklin, J., D. R. Drake, K. R. McConkey, F. Tonga and L. B. Smith, 2004, The effects of Cyclone Waka on the structure of lowland tropical rain forest in Vava’u, Tonga, Journal of Tropical Ecology, vol. 20, no. 4, pp. 409-420.

Wells, M. L., J. F. O’Leary, J. Franklin, J. Michaelsen and D. E. McKinsey, 2004, Variations in a regional fire regime related to vegetation type in San Diego County, California, Landscape Ecology, vol. 19, pp. 139-152.

Franklin, J., 2003, Regeneration and growth of pioneer and shade-tolerant rain forest trees in Tonga, New Zealand Journal of Botany, vol. 41, no. 4, pp. 669-684.

Rogan, J., J. Miller, D. Stow, J. Franklin, L. Levien and C. Fischer, 2003, Land cover change monitoring in southern California using multitemporal Landsat TM and ancillary data, Photogrammetric Engineering and Remote Sensing; vol. 69, no. 7, pp. 793-804.

Scull, P., J. Franklin, and D. McArthur, 2003, Predictive soil mapping: a review, Progress in Physical Geography, vol. 27, no. 2, pp. 171-197.

Franklin, J., 2003, Clustering versus regression trees for determining Ecological Land Units in the southern California mountains and foothills, Forest Science, Special Issue on Forestry Remote Sensing, vol. 49, no. 3, pp. 354-368.

Phinn, S.R., D.S. Stow, J. Franklin, L.A.K. Mertes and J. Michaelsen, 2003, Optimizing Remotely Sensed Data For Ecosystem Analyses: Combining Hierarchy Theory and Scene Models, Environmental Management, vol. 31, no. 3, pp. 429-441.

Miller, J. and J. Franklin, 2002, Predictive vegetation modeling with spatial dependence -- vegetation Alliances in the Mojave Desert, Ecological Modelling vol. 157, pp. 227-247.

Franklin, J., 2002, Enhancing a regional vegetation map with predictive models of dominant plant species in chaparral, Applied Vegetation Science vol. 5, pp. 135-146.

Rogan, J., J. Franklin, and D. A. Roberts, 2002, A comparison of methods for monitoring multitemporal vegetation change using Thematic Mapper imagery, Remote Sensing of Environment vol. 80, no.1, pp. 143-156.

Rogan, J., and J. Franklin, 2001, Mapping wildfire burn severity in southern California forests and shrublands using Enhanced Thematic Mapper imagery, GeoCarto International vol. 16, no. 4, pp. 89-99.

Franklin, J., D. Simons, D, Beardsley, H. Gordon and J. M. Rogan, 2001, Evaluating errors in a digital vegetation map with forest inventory data and accuracy assessment using fuzzy sets, Transactions in GIS vol. 5, no. 4, pp. 285-304.

Meentemeyer, R., A. Moody, and J. Franklin. 2001, Landscape-scale patterns of shrub-species abundance in California chaparral: the role of topographically mediated resource gradients, Plant Ecology, vol. 156, no. 1, pp. 19-41.

Franklin, J., A. D. Syphard, R. P. Martin, D. J. Mladenoff, H. S. He, D. K. Simons, D. Deutschman, and J. F. O’Leary, 2001, Simulating the effects of different fire regimes on plant functional groups in Southern California, Ecological Modelling vol. 142, no. 3, pp. 261-283.

Swenson, J. J. and J. Franklin, 2000, The effects of future urban development on habitat fragmentation in the Santa Monica Mountains, Landscape Ecology, vol. 15, no. 8, pp. 713-730.

Franklin, J., C. E. Woodcock, and R. Warbington, 2000, Digital vegetation maps of forest lands in California: Integrating satellite imagery, GIS modeling, and field data in support of resource management, Photogrammetric Engineering and Remote Sensing, vol. 66, no. 10, pp. 1209-1217.

Steadman, D.W. and J. Franklin, 2000, A preliminary survey of landbirds on Lakeba, Lau Group, Fiji, Emu, vol. 100, pp. 227-235.

 

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