Allan D. Hollander

Contact Information

Dept. of Environmental Science and Policy
University of California, Davis
One Shields Avenue

Davis, CA 95616

Phone: (530) 752-4389
Office: Wickson 2120H


Dr. Hollander is a geographer whose work focuses on the use of information systems for environmental management. Areas of emphasis include spatial analyses of land cover and species distribution patterns, statistical analysis of large environmental datasets using multivariate techniques and machine learning approaches, and developing systems and standards for sharing environmental information, making use of digital cataloging systems and semantic web technologies. Common across this work is his use of a wide variety of open source technologies ranging from geographic information systems to web development platforms.

Current projects include working as a GIS analyst for the UC Davis SBX2 1 nitrate in groundwater project, serving as information architect and resource cataloger for the California Climate Commons website, and providing GIS analytical support for Dr. Louise Jackson of the Department of Land, Air, and Water Resources on various projects related to sustainable agriculture in California. Past projects include being the technical lead for the California Node of the National Biological Information Infrastructure, participating in SPIRE which is an effort to develop applications of the Semantic Web for biodiversity informatics, and helping develop the California Environmental Digital Library Network (CalEDLN).

Selected Publications


Viers, J. H., D. Liptzin, T. S. Rosenstock, V. B. Jensen, A. D. Hollander, A. McNally, A. M. King, G. Kourakos, E. M. Lopez, N. De La Mora, A. Fryjoff-Hung, K. N. Dzurella, H. E. Canada, S. Laybourne, C. McKenney, J. Darby, J. F. Quinn, and T. Harter. 2012. Nitrogen Sources and Loading to Groundwater. Technical Report 2. Center for Watershed Sciences, University of California, Davis. Harter, T., J. R.

Lund, J. L. Darby, G. E. Fogg, R. Howitt, K. K. Jessoe, G. S. Pettygrove, J. F. Quinn, J. H. Viers, D. B. Boyle, H. E. Canada, N. De La Mora, K. N. Dzurella, A. Fryjoff-Hung, A. D. Hollander, K. L. Honeycutt, M. W. Jenkins, V. B. Jensen, A. M. King, G. Kourakos, E. M. Lopez, M. M. Mayzelle, A. McNally, J. Medellin-Azuara, and T. S. Rosenstock. 2012. Addressing Nitrate in California’s Drinking Water with a Focus on Tulare Lake Basin and Salinas Valley Groundwater. Report for the State Water Resources Control Board Report to the Legislature. 78 pp. Center for Watershed Sciences, University of California, Davis.

Hollander, A. D. 2012. Using GRASS and R for landscape regionalization through PAM cluster analysis. OSGeo Journal 10:6.

Williams, J. N., A. D. Hollander, A. T. O’Geen, L. A. Thrupp, R. Hanifin, K. Steenwerth, G. McGourty, and L. E. Jackson. 2011. Assessment of carbon in woody plants and soil across a vineyard-woodland landscape. Carbon Balance and Management 6. doi:10.1186/1750-0680-6-11.

Jackson, L. E., S. M. Wheeler, A. D. Hollander, A. T. O’Geen, B. S. Orlove, J. Six, D. A. Sumner, F. Santos-Martin, J. B. Kramer, W. R. Horwath, R. E. Howitt, and T. P. Tomich. 2011. Case study on potential agricultural responses to climate change in a California landscape. Climatic Change 109:407–427. doi: 10.1007/s10584-011-0306-3.

Young-Mathews, A., S. Culman, S. Sánchez-Moreno, A. Toby O’Geen, H. Ferris, A. Hollander, and L. Jackson. 2010. Plant-soil biodiversity relationships and nutrient retention in agricultural riparian zones of the Sacramento Valley, California. Agroforestry Systems 80:41–60. doi: 10.1007/s10457-010-9332-9.

Jackson, L.E., F. Santos-Martin, A. D. Hollander, W. R. Horwath, R. E. Howitt, J. B. Kramer, A. T. O'Geen, B. S. Orlove, J. W. Six, S. K. Sokolow, D. A. Sumner, T. P. Tomich, S. M. Wheeler. 2009. Potential for Adaptation to Climate Change in an Agricultural Landscape in the Central Valley of California. Report CEC-500-2009-044. California Climate Change Center, California Energy Commission

Waetjen, D. P., J. H. Thorne, A. D. Hollander, A. M. Shapiro, and J. F. Quinn. 2010. The butterfly effect: an approach to web-based scientific data distribution and management with linkages to climate data and the Semantic Web. Page 326 in M. Anandarajan and A. Anandarajan, editors. e-Research Collaboration: Theory, Techniques and Challenges. Springer-Verlag, Heidelberg.

Culman, S., A. Young-Mathews, A. Hollander, H. Ferris, S. Sánchez-Moreno, A. O’Geen, and L. Jackson. 2010. Biodiversity is associated with indicators of soil ecosystem functions over a landscape gradient of agricultural intensification. Landscape Ecology 25:1333–1348. doi: 10.1007/s10980-010-9511-0.

 Holland, R.F. and A.D. Hollander, 2007. Hogwallow biogeography before gracias. In Vernal Pool Landscapes, R.A. Schlising and D.G. Alexander, eds. Studies From the Herbarium, California State University, Chico

Sachs, J., C.S. Parr, A. Parafiynyk, R. Pan, L. Han, D. Li, T. Finin, A. Hollander, T.D. Wang. 2006. Using the semantic web to support ecoinformatics. Pp. 56-61 in V. Honavar and T. Finin, editors. Proceedings of the AAAI Fall Symposium on the Semantic Web for Collaborative Knowledge Acquisition. October 2006. AAAI Press.

Thorne, J.H., S. Gao, A.D. Hollander, J. Kennedy, M. McCoy, R.A. Johnston, and J.F. Quinn. 2006. Modeling potential species richness and urban buildout to identify mitigation sites along a California highway. Transportation Research Part D 11:277-291.

Church, R.L., R.A. Gerrard, A.D. Hollander, and D.M. Stoms. 2000. Understanding the tradeoffs between site quality and species presence in reserve site selection. Forest Science 46:157-167.

Davis, F.W., D.M. Stoms, A.D. Hollander, K.A. Thomas, P.A. Stine, D. Odion, M.I. Borchert, J.H. Thorne, M.V. Gray, R.E. Walker, K. Warner, and J. Graae. 1998. The California Gap Analysis Project: Final Report, June 30, 1998. 255 pp.

Hollander, A.D. 1998. A GIS framework for modelling wildlife species distributions. Ph.D. dissertation, Department of Geography, University of California at Santa Barbara. 195 pp.

Davis, F.W., P.A. Stine, D.M. Stoms, M.I. Borchert, and A.D. Hollander, 1995.Gap analysis of the actual vegetation of California: 1. The Southwestern Region. Madroño, 42:40-78.

Hollander, A.D., F.W. Davis, and D.M. Stoms, 1994. Hierarchical representation of species distributions using maps, images, and sighting data, in Mapping the Diversity of Nature, R.I. Miller, ed.Chapman & Hall, London"


Resources (Data Contact)

Dataset: Geospatial

Resources (Contributor)

Dataset: Monitoring