1999

• "Nitrogen and phosphorus dynamics in relation to grazing pressure in subtropical rangelands," "Phosphorus status of wetland sediments in subtropical rangelands," "Agro-ecosystem indicators of sustainability as affected by cattle density in ranch management systems," and "New directions for long-term agro-ecological research: a focus on grazing lands," Soil Science Society of America, Salt Lake City, 3 November.
• "Plant-soil-microbial interactions in a northern hardwood forest," Ecological Society of America, Spokane, 9-13 August.
• "Nutrient status of wetland sediments in relation to land use in subtropical rangelands," Sixth Symposium on Biogeochemistry of Wetlands, Ft. Lauderdale, 11-14 July.

2000

• "Soil fertility management in rangelands: from microbes to macroinvertebrates," Society for Range Management, Boise, 17 February.
• "Soil ecology of rangelands: the final frontier," Soil Science Society of America, Minneapolis, 7 November.
• "Nitrogen and phosphorus cycling in relation to grazing and land use in subtropical rangelands," and "Earthworms, fine roots, and soil microorganisms in a northern hardwood forest," Ecological Society of America, Snowbird, Utah, 4-9 August.
• "Research at the MacArthur Agro-ecology Research Center," Florida Chapters of the Wildlife Society and the Society for Range Management, Archbold Biological Station, Lake Placid, 16-17 October.
• "Sediment nutrient dynamics of seasonal wetlands in relation to grazing land use," University of Florida, Center for Wetlands, Gainesville, 18 October.
• "Agricultural land use intensity and cattle grazing density impacts on water quality," American Society of Civil Engineers World Water and Environmental Resources, Orlando, 21-24 May.
• "The interactions between earthworm invasion and land use history on the distribution of soil C and N in northern forest ecosystems," Soil Ecology Society, Pine Mountain, Georgia, 20-23 May.

1999

• "Nest success and the timing of nest failure of Florida scrub-jays in urban and natural habitats," (with Glen E. Woolfenden), and "Summary and future needs in the study of urbanization effects on birds," Cooper Ornithological Society, Portland, Oregon, 29 March-3 April.
• "Vegetation structure and post-fledging survival of Florida scrub-jays in suburban and natural habitats; (with Michelle L. Dent), "Effects of supplemental food across a suburban gradient on pre-breeding behavior of female Florida scrub-jays," (with Arthur L. Fleischer, Jr.), "Survival and recruitment of Florida scrub-jays across a suburban gradient: are suburban jay populations stable?" (with Glen E. Woolfenden), "Metabolic rates of Florida scrub-jays," (with Glen E. Woolfenden), "Introduction to urban bird studies: an historical perspective," "Variation in the timing of breeding in two Florida scrub-jay populations: do physiological measures reflect different environments?" and "Synthesis, opportunities and future directions in urban avian ecology," American Ornithologists’ Union, Ithaca, 10-14 August.
• "Integrating population biology, landscape patterns, and viability analyses into habitat conservation planning for the Florida scrub-jay," National Marine Fisheries Service Workshop, Seattle, 6-9 December.

2000

• "Proximate causes of brood reduction in Florida scrub-jays in suburban habitats,"Florida Academy of Sciences, Melbourne, 10-12 March.
• "Assessing restoration potential of Florida scrub-jay habitat using an individual-based model," International Association for Landscape Ecology, Ft. Lauderdale, 15-19 April.
• "Influence of demography, helpers, and landscape on variation in individual dispersal patterns," Animal Behavior Society, Atlanta, 5-9 August.
• "Habitat use and diet of suburban Florida scrub-jays across a gradient of human density," (with Arthur L. Fleischer, Jr.), and "Proximate causes of brood reduction in Florida scrub-jays in suburban habitats," American Ornithologists’ Union, St. Johns, Newfoundland, 14-19 August.
• "Variation in life history traits in a small red-cockaded woodpecker population in central Florida," (with Diana Swan), Florida Ornithological Society, Tallahassee, 29-31September.

1999

• "Vegetation structure and post-fledging survival of Florida scrub-jays in suburban and natural habitats," (with Reed Bowman), American Ornithologists’ Union, Ithaca, 10-14 August.

1999

• "Environmental education at the Archbold Biological Station," Florida Native Plant Society, Palm Coast, 6-9 May.
• "A new Florida scrub curriculum," Lake Wales Ridge Ecosystem Communications Committee, Babson Park, 6 April.

2000

• "Discovering Florida Scrub-a guide to exploring science in a native ecosystem," League of Environmental Educators of Florida, Wakulla Springs, 30 March–2 April.
• "Discovering Florida Scrub-a guide to exploring science in a native ecosystem," Florida Association of Science Teachers-FAST Forward, Miami, 13-15 October.

1999

• "Effects of supplemental food across a suburban gradient on pre-breeding behavior of female Florida scrub-jays," (with Reed Bowman), American Ornithologists’ Union, Ithaca, 10-14 August.
• "Pre-breeding time budgets and timing of breeding of Florida scrub-jays in natural and suburban habitats," Florida Ecological and Evolutionary Symposium, Archbold Biological Station, Lake Placid, 9-11 April.

2000

• "Habitat use and diet of suburban Florida scrub-jays across a gradient of housing density," (with Reed Bowman), American Ornithologists’ Union, St. John’s, Newfoundland, 14-19 August.

1999

• "Egg recognition in the Florida scrub-jay," Florida Ecological and Evolutionary Symposium, Archbold Biological Station, Lake Placid, 9-11 April.

2000

• "Egg rejection in the absence of selection in the Florida scrub-jay," American Ornithologists’ Union, St. John’s, Newfoundland, 14-19 August.

1999

• "Migration patterns of Florida ospreys," Raptor Research Foundation, La Paz, Mexico, 3-7 November.

2000

• "Long-term trends in osprey nesting populations on Lake Istokpoga, Florida," Raptor Research Foundation, Jonesboro, Arkansas, 8-11 November.

1999

• "Comparative genetics of seven plants endemic to Florida’s Lake Wales Ridge," Association of Southeastern Biologists, Wilmington, North Carolina, 14-17 April.
• "Comparative genetics of seven plants endemic to Florida’s Lake Wales Ridge," Ecological Society of America, Spokane, 9-13 August.
• "What do scrub plants need?" Scrub Management Workshop, Tampa, 24-25 August.
• "What is the effect of seed collection on extinction risk? Strategies for survival," Ex Situ Plant Conservation Symposium, Chicago, 29 September-1 October.
• "Population viability analyses in plants: applications to conservation and management," Natural Areas Association, Tucson, 10-16 October.

2000

• "Geographic predictors of genetic variation in Nolina brittoniana, a Florida scrub endemic plant: comparing current and past landscapes," (with Roberta L. Pickert and Carl W. Weekley, Jr.), British Ecological Society and Ecological Society of America, Orlando, 10-13 April.
• "Effects of current and past landscapes on genetic variation in a Florida scrub endemic plant," (with Roberta L. Pickert and Carl W. Weekley, Jr.), Society for Conservation Biology, Missoula, 9-12 June.
• "Integrating long-term demographic monitoring and research in plant ecology: an example from the Florida scrub," Natural Areas Association, St. Louis, 12-16 October.

2000

• "Geographic predictors of genetic variation in Nolina brittoniana, a Florida scrub endemic plant: comparing current and past landscapes," (with Eric S. Menges and Carl W. Weekley, Jr.), British Ecological Society and Ecological Society of American, Orlando, 10-13 April.
• "Effects of current and past landscapes on genetic variation in a Florida scrub endemic plant," (with Eric S. Menges and Carl W. Weekley, Jr.), Society for Conservation Biology, Missoula, 9-12 June.
• "Society for Conservation GIS International Scholarship Programme," Russian Far East Conservation GIS Conference, Khabarovsk, Russia, 16-29 November.

2000

• "Hypericum cumulicola population dynamics in human modified and natural habitats," Society for Conservation Biology, Missoula, 9-12 June.

1999

• "The Organization of Biological Field Stations: an established network of field sites for detecting long-term ecological change," Ecological Society of America, Spokane, 9-13 August.
• "Integrating ecological, economic, and policy factors in grazing lands," Society for Conservation Biology, College Park, Maryland, 17-21 June.
• "Developing priorities for conservation research in Florida," Florida Chapter of The Wildlife Society, Orlando, 1-2 April.
• "New directions for long-term agro-ecology research: a focus on grazing lands," American Society of Agronomy, Salt Lake City, 26-29 October.

2000

• "Current Research at the MacArthur Agro-ecology Research Center," Florida Native Plant Society, Dade City, Florida, 20 October.
• "A critique of state land acquisition programs: are we protecting the state’s most critical resources?" Public Lands Acquisition and Management Partnership 2000 Conference, Haines City, Florida, 15-17 November.

1999

• "Characteristics of woodpecker nests in longleaf pine forest," Florida Ornithological Society, Gainesville, 24-26 September.
• "Characteristics of woodpecker nest-sites in longleaf pine forest," American Ornithologists’ Union, Ithaca, 10-14 August.

1999

• "Restoration ecology of Florida jujube, Ziziphus celata," Florida Native Plant Society, Palm Coast, 6-9 May.
• "Seed germination, seedling survival and fire management of an endangered annual mustard," Natural Areas Association, Tucson, 10-16 October.

2000

• "The breeding system of Ziziphus celata Judd and D. Hall (Rhamnaceae), a rare shrub endemic to the Lake Wales Ridge, Florida," South Florida Plant Biologists, Miami, 1 April.
• "Demography, ecology and reproductive biology of Lewton’s polygala, a rare herb endemic to the central ridges of Florida," and "Natural history of blackbead galls," Florida Native Plant Society, Miami, 4-6 May.
• "The breeding system of Ziziphus celata Judd and D. Hall (Rhamnaceae), a rare shrub endemic to the Lake Wales Ridge, Florida," Botanical Society of America, Portland, Oregon, 6-10 August.
• "Geographic predictors of genetic variation in Nolina brittoniana, a Florida scrub endemic plant: comparing current and past landscapes," (with Eric S. Menges and Roberta L. Pickert), British Ecological Society and Ecological Society of America, Orlando, 10-13 April.
• "Effects of current and past landscapes on genetic variation in a Florida scrub endemic plant," (with Eric S. Menges and Roberta L. Pickert), Society for Conservation Biology, Missoula, 9-12 June.

1999

• "Metabolic rates of Florida scrub-jays," (with Reed Bowman), "Survival and recruitment of Florida scrub-jays across a suburban gradient: are suburban jay populations stable?" (with Reed Bowman), "All in the family: Florida scrub-jay style," "Contrasting genetic structures of scrub-jay sister species," and "Ecological influences on interannual variation in timing of breeding in Florida scrub-jays," American Ornithologists’ Union, Ithaca, 10-14 August.
• "Nest success and the timing of nest failure of Florida scrub-jays in urban and natural habitats," Cooper Ornithological Society, Portland, Oregon, 29 March-3 April.

2000

• "Climate change, timing of breeding, and conservation threats: insights from long-term study of Florida scrub-jays," American Ornithologists' Union, St. Johns, Newfoundland, 14-19 August.