The central aim of my research is to elucidate the processes driving fluctuations in population abundance across time and space. I address theory that is relevant to conservation of native and beneficial insects as well as management of agricultural and forest pests. My approach blends field experiments, analysis of spatial data, and theoretical modeling.

My current research has three foci: 1) the role of multitrophic interactions in the spatial synchrony and periodicity of forest-insect outbreaks; 2) the effects of climate change on the outbreak dynamics of forest-defoliating insects; and 3) the influences of landscape structure on plant-herbivore and plant-pollinator interactions.

Selected Recent Publications

Haynes, K.J., A.M. Liebhold, T.M. Fearer, G. Wang, G.W. Norman, and D.M. Johnson. 2009. Spatial synchrony propagates through a forest food web via consumer-resource interactions. Ecology, in press.

Haynes, K.J., and T.O. Crist. 2009. Insect herbivory in an experimental agroecosystem: the relative importance of habitat area, fragmentation, and the matrix. Oikos, in press.

Haynes, K.J., A.M. Liebhold, and D.M. Johnson. 2009. Spatial analysis of harmonic oscillation of gypsy moth outbreak intensity. Oecologia 159: 249-256.

Reeve, J.D., J.T. Cronin, and K.J. Haynes. 2008. Diffusion models for animals in complex landscapes: incorporating heterogeneity among substrates, individuals, and edge behaviors. Journal of Animal Ecology 77: 898-904.

Diekötter, T., K.J. Haynes, D. Mazeffa, and T.O. Crist. 2007. Direct and indirect effects of habitat area and matrix composition on species interactions among flower-visiting insects. Oikos 116: 1588-1598.

Haynes, K.J., T. Diekötter, and T.O. Crist. 2007. Resource complementation and the response of an insect herbivore to habitat area and fragmentation. Oecologia 153: 511-520.

Haynes, K.J., F. Dillemuth, B. Anderson, A. Hakes, H.B. Jackson, S.E. Jackson, and J.T. Cronin. 2007. Landscape context outweighs local habitat quality in its effect on herbivore dispersal and distribution. Oecologia 151: 431-441.

Haynes, K.J., and J.T. Cronin. 2006. Interpatch movement and edge effects: the role of behavioral responses to the landscape matrix. Oikos 113: 43-54.

Cronin, J.T., and K.J. Haynes. 2004. An invasive plant promotes unstable host-parasitoid patch dynamics. Ecology 85: 2772-2782.

Haynes, K.J., and J.T. Cronin. 2004. Confounding of patch quality and matrix effects in herbivore movement studies. Landscape Ecology 19: 119-124.

Baum, K.A., K.J. Haynes, F. Dillemuth, and J.T. Cronin. 2004. Enhancing connectivity: corridors, stepping stones, and the matrix. Ecology 85: 2671-2676.

Cronin, J.T., K.J. Haynes, and F. Dillemuth. 2004. Spider effects on planthopper mortality, dispersal, and spatial population dynamics. Ecology 85: 2134-2143.

Haynes, K.J., and J.T. Cronin. 2003. Matrix composition affects the spatial ecology of a prairie planthopper. Ecology 84: 2856-2866.