Greg Barron-Gafford is an Assistant Professor with a split appointment between the School of Geography & Development and Biosphere 2. He received is B.S. in Environmental Sciences from Texas Christian University before earning his M.S. in Forest Ecology from the University of Georgia and a Ph.D. in Ecology & Evolutionary Biology from the University of Arizona. His research is centered on developing our understanding of semiarid ecosystem responses and adaptation to climatic changes, such as increased temperature and reduced precipitation. Due to concomitant changes in our earth’s climate and anthropogenic uses of natural systems, regional-scale vegetative cover has been in a state of flux across many semiarid areas. These transitions in vegetation have significant implications for plot, landscape, and regional carbon, water, and energy balance. Barron-Gafford has used a combination of growth chambers, greenhouses, Biosphere 2 macrocosms, and a series of natural-system eddy covariance towers to quantify carbon and water flux across a mosaic of ecosystem types - both natural and built environments. Such data area leading to estimations of environmental limitations to productivity and enhancing the parametrization of regional models aimed at quantifying the influence that vegetative cover has on ecosystem carbon and water flux under current and project climate regimes.
Barron-Gafford GA, Cable JM, Bentley LP, Scott RL, Huxman TE, Jenerette GD, Ogle K. (2014). Quantifying the timescales over which exogenous and endogenous conditions affect soil respiration. New Phytologist, 202, 442–454, doi: 10.1111/nph.12675.
Potts DL, Barron-Gafford GA, Jenerette GD (2014). Metabolic acceleration quantifies biological systems' ability to up-regulate metabolism in response to episodic resource availability. Journal of Arid Environments. 104, 9-16.
Scott RL, Huxman TE, Barron-Gafford GA, Jenerette GD, Young JM, Hamerlynck EP. (2014). When vegetation change alters ecosystem water availability. Global Change Biology. doi: 10.1111/gcb.12511.
Nelson, K, Kurc SA, John G, Minor RL, Barron-Gafford GA. (2014). Influence of snow cover duration on soil evaporation and respiration efflux in mixed- conifer ecosystems. Ecohydrology. 7, 869-880.
Kimball S, Gremer JR, Barron-Gafford GA, Angert AL, Huxman TE, Venable DL. (2014). High water-use efficiency and growth contribute to success of non-native Erodium cicutarium in a Sonoran Desert winter annual community. Conservation Physiology. doi:10.1093/conphys/cou006.
Hamerlynck EP, Scott RL, Sánchez-Cañete EP, Barron-Gafford GA. (2013). Nocturnal soil CO2 uptake and its relationship to subsurface soil and ecosystem carbon fluxes in a Chihuahuan Desert shrubland. Journal of Geophysical Research-Biogeosciences, 118, 1593–1603, doi: 10.1002/2013JG002495.
Barron-Gafford GA, Scott RL, Jenerette GD, Hamerlynck EP, Huxman TE. (2013). Landscape and environmental controls over leaf and ecosystem carbon dioxide fluxes under woody plant expansion. Journal of Ecology, 101, 1471–1483, doi: 10.1111/1365-2745.12161.
Hamerlynck EP, Scott RL, Cavanaugh ML, Barron-Gafford GA. (2013). Water use efficiency of annual- and bunchgrass-dominated savanna intercanopy space. Ecohydrology. doi: 10.1002/eco.1452
Cable JM, Ogle K, Barron-Gafford GA, Bentley LP, Cable WL, Scott RL, Williams DG, Huxman TE. (2013). Antecedent conditions influence soil respiration differences in shrub and grass patches. Ecosystems, 16, 1230-1247, doi: 10.1007/s10021-013-9679-7.
Barron-Gafford GA, Angert AL, Venable DL, Tyler AP, Gerst KL, Huxman TE. (2013). Photosynthetic temperature responses of co-occurring desert winter annuals with contrasting resource-use efficiencies and different temporal patterns of resource utilization may allow for species coexistence. Journal of Arid Environments. 91, 95-103.