Associate Research Professor
More info: Merriam-Powell Center for Environmental
Research; Colorado Plateau
Museum of Arthropod Biodiversity
- arthropod biodiversity
- ecological gradients
- climate and land-use change
- PhD: Northern Arizona University,
- MS: Northern Arizona University, Biology,
- BS: Oregon State University, Entomology,
My current research interests include:
- ecological patterns in arthropod
biodiversity and the processes that mediate biodiversity
- population and community responses to
- climate change impacts on species
Although my research is not limited to
specific taxa I primarily work on arthropods and vascular plants.
As curator of the Colorado Plateau Museum of Arthropod Biodiversity I am interested in
documenting arthropod biodiversity across environmental gradients.
The Museum specializes in developing
regional arthropod biodiversity databases for the Colorado Plateau that can be
incorporated into species distribution-climate change models.
My teaching interests cover the fields of
entomology and ecology. I currently teach Entomology and several graduate
courses in ecology.
In addition to my research faculty
appointment in the Department of Biological Sciences, I serve as the Director
of the Merriam-Powell Center for Environmental Research.
The Merriam-Powell Center promotes
environmental research, education, and outreach, which provides me with
unlimited opportunities to interact with faculty and students from multiple
departments from computer science to geography.
Cobb, N.S., B.E. Ralston, S.L. Brantley,
J.E. Higgins, R.J. Delph, and K. Whitely. Ground-dwelling arthropods as
indicators of change in riparian habitat following regulation along the
Colorado River in Glen Canyon National Recreation Area, Arizona. (In Submission
to River Research and Applications).
Delph R.J., M.J. Clifford, P.L. Ford, and
N.S. Cobb. The Impact of Pinyon Pine Mortality on Ground-Dwelling Arthropod
Communities. (In Submission to Ecological Indicators).
Guardiola-Claramonte M., P.A. Troch, D.D.
Breshears, T.E. Huxman, M.B. Switanek, M. Durcik, and N.S. Cobb. Stream flow in
semi-arid basins unexpectedly decreases after drought-induced tree die-off. In
Submission to Hydroecology.
Ironside, K.E., N.S. Cobb, and K.L. Cole.
Potential Impacts of Climate Change on Races of Ponderosa Pine: Recognizing
Within-Species Variation. (In Submission to Journal of Biogeography).
Ikeda, D.H., K. E. Ironside, and N.S.
Cobb. Predicting Current and Future Potential Habitat of a Threatened
Foundation Species. (In Submission to Diversity and Distributions).
Lindsay, D.L., P. Bailey, R.F. Lance,
M.J. Clifford, R. Delph, and N.S. Cobb. Effects of a nonnative, invasive
lovegrass on Agave palmeri distribution, abundance, and insect pollinator
communities. In Submission to Biodiversity and Conservation.
Royer, P.D., D.D. Breshears., C.B. Zou,
N.S. Cobb, and S.A. Kurc. Density-dependent effects of evergreen woody plants
in rangelands: Ecohydrological implications for soil microclimate and potential
soil evaporation. (In submission to Rangeland Ecology and Management)
Higgins, J.E, N.S. Cobb, S. Sommer, R.J.
Delph, and S.L. Brantley. Ground dwelling arthropod responses to successional
endpoints from burned to old growth pinyon-juniper woodland. (In Prep for
Krause, C.M. N.S. Cobb and D.D.
Pennington. Range shifts and extinction risk under future scenarios of climate
change: Dispersal ability matters for Colorado Plateau endemic plants. (In Prep
for Diversity and Distributions).
In press/published (2010-2011)
Clifford, M.M., N.S. Cobb, and M.
Buenemann. 2011. Long-Term Tree Cover Dynamics in a Pinyon-Juniper Woodland:
Climate-Change-Type Drought Resets Successional Clock. (In final revision with
Royer, P.D., N.S. Cobb, M.M. Clifford, C.
Huang, , D.D. Breshears, J.C. Villegas, and H.D. Adams. 2011. Rapid
regional-scale die-off of woody plants and consequent effects on environment:
extreme event alteration of overstory attenuation of solar radiation. In Press,
J. of Ecology.
Royer, P.D., D.D. Breshears., C,B. Zou,
N.S. Cobb, and S.A. Kurc. 2010. Ecohydrological energy inputs in semiarid
coniferous gradients: Responses to management- and drought-induced tree
reductions. Forest Ecology and Management, 260, 1646–1655.
Wu, Z., Z. Hongjun, C. Krause, and N.S.
Cobb. 2010. Climate change and human activities: a case study in Xinjiang,
China. Climatic Change, 99, 457-472.
Garfin, G.M., J.K. Eischeid, M. Lenart,
K.L. Cole, K. Ironside, and N.S. Cobb. 2010. Downscaling climate projections to
model ecological change on topographically diverse landscapes of the arid
Southwestern United States. In: The Colorado Plateau IV: Shaping Conservation
Through Science and Management (van Riper, C., III, B. F. Wakeling, and T. D.
Sisk, Eds). University of Arizona Press, Tucson, AZ. 368 pp.
Allen C.D, A.K. Macalady, H. Chenchouni, D.
Bachelet, N. McDowell, M. Vennetier, T. Kitzberger, A. Rigling, D.D Breshears,
E.H. Hogg, P. Gonzalez, R. Fensham, Z. Zhang, J. Castro, N. Demidova; J.-Hwan
Lim, G. Allard; S.W Running, A. Semerci, and N. Cobb. 2010 A Global Overview of
Drought and Heat-Induced Tree Mortality Reveals Emerging Climate Change Risks
for Forests. Forest Ecology and Management 259, 660–684.