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2006.
“Host usage and seasonal activity patterns of Ixodes kingi and I. sculptus (Acari: Ixodidae) in Colorado prairie landscape, with a summary of published North American host records”
31 (1): 168-180.
2006.
“Structural asymmetry and the stability of diverse food webs”
442 (7100): 265-269.
2007.
“A new paradigm for assessing the role of agriculture in the climate system and in climate change”
142 (4-Feb): 234-254.
2006.
“Climate change and managed ecosystems”
35 (1966a): 1967a.
2006.
“Extreme plasticity in thermoregulatory behaviors of free-ranging black-tailed prairie dogs”
79 (3): 454-467.
2006.
“Forage preferences in two species of prairie dog (Cynomys parvidens and Cynomus ludovicianus): Implications for hibernation and facultative heterothermy”
269: 249-259.
2006.
“Root biomass of individual species, and root size characteristics after five years of CO2 enrichment on native shortgrass steppe”
279: 219-228.
2006.
“Chemical structural information from solid state 13C NMR studies of a suite of humic materials from lower montane forest soil, Colorado, USA”
130: 124-140.
2006.
“Response of soil microbial biomass and enzyme activities to the transient elevation of carbon dioxide in a semi-arid grassland”
38: 2448-2460.
2006.
“Extreme climatic events shape arid and semiarid ecosystems”
4: 87-95.
2005.
“Functional- and abundance-based mechanisms explain diversity loss due to N fertilization”
102(12): 4387-4392.









