• The influence of extrafloral nectaries on the location of ant nests: implications for plant nutrition
• The role of extrafloral nectaries in defense of aspen during a widespread insect outbreak
• The influence of intensive willow herbivory by an outbreak insect population on succession and ecosystem function

Teaching

• Principles of Ecology, BIOL F271
• Research Design, BIOL F602
• Animal-Plant Interactions, BIOL F693
• Fundamentals of Biology II, BIOL F116X

Education

• PhD, Princeton University 1994
• BA, University of California Berkeley 1986

Employment

• 2007 - present: Associate Professor of Biology, University of Alaska, Fairbanks
• 2002 - 2007: Assistant Professor of Biology, University of Alaska, Fairbanks
• 1998 - 2002: Assistant Professor, University of Nevada Las Vegas
• 1996 - 1998: Postdoctoral Research Associate, Stanford University
• 1996: Visiting Assistant Professor, Mills College
• 1994 - 1996 - USDA Postdoctoral Fellow
• 1994: Postdoctoral Research Associate, Washington State Univeristy

Publications (please contact me for reprints)

• Mortensen BD, Wagner D & Doak P. Defensive effects of extrafloral nectaries in quaking aspen differ with scale. Oecologia, in press.

• Wagner D & Nicklen EF (2010) Ant nest location, soil nutrients, and nutrient uptake by ant-associated plants: Does extrafloral nectar attract ant nests and thereby enhance plant nutrition? Journal of Ecology 98: 614-624.

• Young BD, Wagner D, Doak P & Clausen TP (2010) Within-plant distribution of phenolic glycosides and extrafloral nectaries in trembling aspen, Populus tremuloides. American Journal of Botany 97: 601-610.

• Young BD, Wagner D, Clausen T & Doak P (2010) Induction of phenolic glycosides in aspen (Populus tremuloides) in response to epidermal leaf mining by an outbreak insect species, Phyllocnistis populiella. Journal of Chemical Ecology 36: 369-377.

• Wagner D, DeFoliart L, Doak P, Schneiderheinze J. (2008) Impact of epidermal leaf mining by the aspen leaf miner (Phyllocnistis populiella) on growth, physiology, and leaf longevity of quaking aspen. Oecologia 157: 259-267.
• Wagner D, DeFoliart L, Doak P, Schneiderheinze J. (2008) Impact of epidermal leaf mining by the aspen leaf miner (Phyllocnistis populiella) on growth, physiology, and leaf longevity of quaking aspen. Oecologia 157: 259-267.

• Doak P, Wagner D & Watson A. (2007) Variable extrafloral nectary expression and its consequences in quaking aspen.  Canadian Journal of Botany, 85: 1-9.
• Nicklen EF & Wagner D (2006) Conflict resolution in an ant-plant interaction: Acacia constricta traits reduce ant costs to reproduction. Oecologia 148: 81-87.
• Wagner D & Jones JB (2006) The impact of harvester ant nests on decomposition, N mineralization, litter quality, and availability of N to plants in the Mojave Desert. Soil Biology & Biochemistry 38: 2593-2601.
• Jones JB, Wagner D (2006) Microhabitat-specific controls on soil respiration and denitrification in the Mojave Desert: the role of harvester ant nests and vegetation. Western North American Naturalist 66: 426-432.
• Wagner D, Jones JB, & Gordon DM (2004) Development of harvester ant colonies alters soil chemistry. Soil Biology & Biochemistry 36: 797-804.
• Wagner D & Jones JB (2004) The contribution of harvester ant nests (Pogonomyrmex rugosus, Hymenoptera, Formicidae) to soil nutrient stocks and microbial biomass in the Mojave Desert. Environmental Entomology 33:599-607.
• Sanders NJ, Moss J & Wagner D (2002) Patterns of ant species richness along elevation gradients in an arid ecosystem.  Global Ecology and Biogeography 12: 93-102.
• Wagner, D & Kay, A. (2002) Do extrafloral nectaries distract ants from visiting flowers? An experimental test of an overlooked hypothesis. Evolutionary Ecology Research 4: 293-305.
• Wagner, D, Tissot, M & Gordon, DM. (2001) Task-related environment affects the cuticular hydrocarbon composition of harvester ants. Journal of Chemical Ecology 27: 1805-1819.
• Wagner D, Tissot M, Cuevas W and Gordon DM (2000) Harvester ants utilize cuticular hydrocarbons in nestmate recognition. Journal of Chemical Ecology, 26: 2245-2257.
• Wagner D (2000) Pollen viability reduction as a potential cost of ant association for Acacia constricta. American Journal of Botany, 87: 711-715.
• Hughes L, Siew-Woon Chang B, Wagner D and Pierce NE (2000) Effects of mating history on ejaculate size, fecundity, longevity and copulation duration in the ant-tended lycaenid butterfly, Jalmenus evagoras. Behavioral Ecology and Sociobiology 47: 119-128.
• Wagner D and Gordon DM (1999) Colony age, neighborhood density and reproductive potential in harvester ants. Oecologia 119: 175-182.
• Wagner D, Brown MJF, Broun P, Cuevas W, Moses LE, Chao DL and Gordon DM (1998) Task-related differences in the cuticular hydrocarbon composition of harvester ants, Pogonomyrmex barbatus. Journal of Chemical Ecology 24: 2021-2037.
• Wagner D, Brown M, and DM Gordon (1997) Harvester ant nests, soil biota, and soil chemistry. Oecologia 112: 232-236.
• Wagner D (1997 The influence of ant nests on Acacia seed production, herbivory, and soil nutrients. Journal of Ecology 85: 83-94.
• Wagner D and L Kurina (1997) The influence of ants and water availability on oviposition behaviour and survivorship of a facultatively ant-tended herbivore. Ecological Entomology 22: 352-360.
• Wagner D and DM Gordon (1997) Neighborhood density and reproductive potential in harvester ants. Oecologia 109:556-560 .
• Wagner D and C Martinez del Rio (1997) Experimental tests of the mechanism for ant-enhanced growth in an ant-tended lycaenid butterfly. Oecologia 112: 424-429.
• Thompson JN, Althoff DM, Cunningham B, Segraves K, and D Wagner (1997) Plant polyploidy and insect/plant interactions. American Naturalist 150: 730-743.
• Wagner D (1995) Pupation site choice of a North American lycaenid butterfly: the benefits of entering ant nests. Ecological Entomology 20: 384-392.
• Wagner D (1993) Species-specific effects of tending ants on the development of lycaenid butterfly larvae. Oecologia 96: 276-281.