Halvor Halvorson, Ph.D

Assistant Professor


LSC 154

(501) 852-1280


B.A. St. Olaf College, 2011
Ph.D. University of Arkansas, 2016
Postdoctoral Research, University of Southern Mississippi, 2016-2019
Started at UCA in 2019


Courses Taught:

General Ecology

Environmental Practicum

Freshwater Ecology

Science Ethics

Biology Capstone

Research Interests:

Ecosystem ecology, biogeochemistry, nutrition, stream ecology, aquatic invertebrates, microbial ecology


Laboratory Website:


Selected Publications:

Costello, D.M., S.D. Tiegs, L. Boyero, C. Canhoto, K.A. Capps, M. Danger, P.C. Frost, M.O. Gessner, N.A. Griffiths, H.M. Halvorson, et al. 2022. Global patterns and controls of nutrient immobilization on decomposing cellulose in riverine ecosystems. Global Biogeochemical Cycles 36: e2021GB007163. DOI: 10.1029/2021GB007163

Price, T.L., J. Harper, S.N. Francoeur, H.M. Halvorson, and K.A. Kuehn. 2021. Brown meets green: Light and nutrients alter detritivore assimilation of microbial nutrients from leaf litter. Ecology 102: e03358. DOI: 10.1002/ecy.3358

Hebert, T.A., H.M. Halvorson, and K.A. Kuehn. 2021. A literature synthesis resolves litter intrinsic constraints on fungal dynamics and decomposition across standing dead macrophytes. Oikos 130: 958-968. DOI: 10.1111/oik.08174

Brady, C.M., J. Bonney, S.N. Francoeur, H.M. Halvorson, and K.A. Kuehn. 2021. Leaf-litter decomposition and microbial responses to light and macroinvertebrate consumer manipulations in experimental streams. Freshwater Science 40: 340-353. DOI: 10.1086/714516

Lodato, M.B., J.S. Boyette, R.A. Smilo, C.R. Jackson, H.M. Halvorson, and K.A. Kuehn. 2021. Functional importance and diversity of fungi during standing grass litter decomposition. Oecologia 195: 499-512. DOI: 10.1007/s00442-020-04838-y