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.
(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.
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,
H. Reşit, Janet Franklin, Alexandra D. Syphard, and John Stephenson,
Viability of Bell's Sage Sparrow (Amphispiza
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;
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,
P., J. Franklin, and D. McArthur, 2003, Predictive
soil mapping: a review, Progress in Physical Geography, vol. 27,
no. 2, pp. 171-197.
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,
vol. 157, pp. 227-247.
J., 2002, Enhancing a regional vegetation map with
predictive models of dominant plant species in chaparral,
Science vol. 5, pp. 135-146.
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.
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.
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.
R., A. Moody, and J. Franklin. 2001, Landscape-scale
patterns of shrub-species abundance in California
chaparral: the role of topographically mediated resource
Ecology, vol. 156, no. 1, pp. 19-41.
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.
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.
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,
D.W. and J. Franklin, 2000, A preliminary survey of
landbirds on Lakeba, Lau Group, Fiji, Emu,
vol. 100, pp. 227-235.