Paul Barnes

Professor and Rev. John H. Mullahy, SJ Endowed Chair of Environmental Biology
e-mail: pwbarnes@loyno.edu
Phone: 504-865-2008 , Office: Monroe Hall 350
Home Page:

Ph.D. in Biological Sciences, University of Nebraska, 1984. 

Research interests

Functional ecology of plants and global change biology.

Current research interests

Competition/facilitation and woody plant increase in grasslands and savannas; ecological and physiological effects of stratospheric ozone depletion and increased ultraviolet-B radiation on plants and ecosystems. 

Recent publications

Shinkle JR, Derickson DL, Barnes PW.  2005. Comparative photobiology of growth responses to two UV-B wavebands and UV-C in dim-red-light- and white-light-grown cucumber (Cucumis sativus) seedlings: Physiological evidence for photoreactivation.  Photochemistry and Photobiology, 81 (5): 1069-1074.

Zou, CB; Barnes, PW; Archer, S;  McMurtry CR  2005.  Soil moisture redistribution as a mechanism of facilitation in Savanna tree-shrub
clusters.  Oecologia, 145 (1): 32-40.

Shinkle JR, Atkins AK,  Humphrey EE, Rodgers CW, Wheeler SL, Barnes PW. 2004. Growth and morphological responses to different UV wavebands in cucumber (Cucumis sativum) and other dicotyledonous seedlings  Physiologica Plantarum, 120 (2): 240-248.

Barnes , P.W., J. R. Shinkle, S.D. Flint , and R.J. Ryel. 2004. UV-B radiatio n, photomorphogenesis and plant-plant interactions. Progress in Botany Vol. 66 ( Esser, K.; Lüttge, U.; Beyschlag, W.; Murata, J., editors), 420 pp., Springer, Berlin .

Jessup KE, Barnes PW, Boutton TW.  2003. Vegetation dynamics in a Quercus-Juniperus savanna: An isotopic assessment. Journal of Vegetation Science, 14 (6): 841-852.

Phillips PL, Barnes PW.  2003. Spatial asymmetry in tree-shrub clusters in a subtropical savanna. American Midland Naturalist, 149 (1): 59-70.

Nelson JA, Barnes PW, Archer S. 2002.  Leaf demography and growth responses to altered resource availability in woody plants of contrasting leaf habit in a subtropical savanna.  Plant Ecology, 160 (2): 193-205.

Barnes PW, Searles PS,  Ballare CL, Ryel RJ, Caldwell MM   2000. Non-invasive measurements of leaf epidermal transmittance of UV radiation using chlorophyll fluorescence: field and laboratory studies  Physiologica Plantarum, 109 (3): 274-283

Barnes PW.  1999.  Tree-shrub interactions in a subtropical savanna parkland: Competition or facilitation? Journal of Vegetation Science, 10 : 525 .

 

Courses

Global Ecology, Plant Ecology.