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Learning the rhythm of the seasons in the face of global change: phenological research in the 21st Century. Frontiers in Ecology and the Environment.. In Press.
Woody plant proliferation in North American drylands: a synthesis of impacts on ecosystem carbon balance. Journal Geophysical Research – Biogeosciences. :116,G00K07.. 2011.
Phenological trend estimation: a reply to Sagarin. Frontiers in Ecology and the Environment. 7(6):296.. 2009.
Shrub encroachment in North American grasslands: Shifts in growth form dominance rapidly alters control of ecosystem carbon inputs. Global Change Biology. 14:615-623.. 2008.
Tracking the rhythm of the seasons in the face of global change: phenological research in the 21st century. Frontiers in Ecology and the Environment. 7(5):253-260.. 2008.
The use of large scale aerial photography to inventory and monitor arid rangeland vegetation. Journal of Environmental Management. 31:29-38.. 1990.
Monitoring arid land vegetation change with remote sensing: an example from southern Arizona. Arid Lands: Today and Tomorrow. :251-259.. 1988.