DEPT. of FOREST ECOSYSTEMS & SOCIETY
OREGON STATE UNIVERSITY
My interest is in quantitative population ecology, with a focus on understanding how environmental patterns at different scales affect biodiversity in both temperate and tropical forest systems. Specifically, I study how land-use and climate changes in montane forest landscapes influence species distributions, abundance trends, and community composition. I apply novel analytical tools (i.e., hierarchical models, machine learning) to address my research questions. Some of my recent research has examined 1) the potential for vegetation structure to provide microrefugia for biodiversity in the face of regional warming in the Pacific Northwest, 2) the influence of tropical forest fragmentation on hummingbird community structure and functional traits in Costa Rica, and 3) how scale and imperfect detection influence long term abundance trends of forest birds at Hubbard Brook.
Hadley, A.S., S.J.K. Frey, W.D. Robinson, and M.G. Betts (2017) Forest fragmentation and loss reduce richness, availability and specialization in tropical hummingbird communities. Biotropica: doi: 10.1111/btp.12487
Frey, S.J.K., A.S. Hadley, S.L. Johnson, M. Schulze, J. Jones, and M.G. Betts (2016) Spatial models reveal microclimatic buffering capacity of old-growth forest. Science Advances 2: e1501392.
Frey, S.J.K., A.S. Hadley, and M.G. Betts (2016) Microclimate predicts within-season distribution dynamics of montane forest birds. Diversity and Distributions 22: 944-959.