John H Markham

Assistant Professor

Department of Biological Sciences, University of Manitoba

Winnipeg, Manitoba, Canada, R3T 2N2

Office: Z434 Duff Roblin Building

 

markhamj@cc.umanitoba.ca

Telephone: (204) 474-7180

Fax: (204) 474-7588

COURSES I TEACH

Field Ecology (BOTN 3420, ZOOL 3450)

Foundations of Life (BIOL 1000)

Principles of Ecology (BOTN/ZOOL 2370)

Plant Interactions (BOTN 4150)

Advanced Plant Ecology (BOTN 7490)  

 

RESEARCH INTERESTS

My general research interests are the ecology and evolution of interactions between organisms.  In particular, I am interested in the ecology and evolution of actinorhizal plants and their nitrogen fixing symbiont, Frankia. This is an interesting model system for understanding mutualisms because of the large taxonomic range of host plant species and because the relationship results from the formation of distinct anatomical structures (nodules) which can be quantified. Nitrogen fixation occurring as a result of this relationship also plays an important role in the functioning of many terrestrial ecosystems.

 

RECENT PUBLICATIONS

 

Markham, J. H., Grime, J.P. and Buckland, S. 2008. Reciprocal interactions between plants and soil in a upland grassland. Ecological Research.  In Press.

Markham, J. H. 2008. Variability of Frankia spore types on Alnus. Botany. In Press.

Markham, J. H. 2008. Population size effects on germination, growth and symbiotic nitrogen fixation in an actinorhizal plant at the edge of its range. Botany.  In Press.

Markham, J.H.  and Zekveld, C. 2007. Nitrogen fixation makes allocation to roots independent of nitrogen supply. Canadian Journal of Botany.  85: 787-793.

Markham, J. 2005. The effect of mycorrhizae and nitrogen fixing nodules on the performance of Alnus incana spp. rugosa in mine tailings. Canadian Journal of Botany. 83: 1384 – 1390.

Markham, J. 2002. A Hierarchical Analysis of Seed Production by Alnus rubra. Am. Mid. Nat. 148: 246 ­ 252.

Chanway, C.P., Shishido, M., Nairn, J., Jungwirth, S., Markham, J., Xiao, G. And Holl, F. B. 2000. Endophytic colonization and field responses of hybrid spruce seedling after inoculation with plant growth-promoting rhizobacteria. For. Ecol. and Man. 133: 81-88.

Markham, J. H. and Chanway, C.P. 1999. Does past contact reduce the degree of mutualism in the actinorhizal plant/Frankia symbiosis? Canadian Journal of Botany. 77: 434 - 441. ABSTRACT. PDF version.

Markham, J. H. Chanway, C.P. 1998. Response of red alder (Alnus rubra Bong.) seedlings to a woolly alder sawfly (Eriocampa ovata L.) outbreak. Canadian Journal of Forest Research. 28: 591 - 595. ABSTRACT. PDF version

Markham, J. H. and Chanway, C.P. 1998. Distribution of red alder nodule spore types in southwestern Brtitsh Columbia. Plant Ecology. 135: 197 - 205. ABSTRACT. PDF version

Chanway, C.P., Shishido, M., Jungwirth, S., Nairn, J., Markham, J., Xiao, G. and Holl, F. B. 1997. Second year growth responses of outplanted conifer seedlings inoculated with PGPR. pp. 172 - 176. In: Plant growth-promoting rhizobacteria: present status and future prospects. Proceedings of the fourth international workshop on plant growth promoting rhizobacteria. Eds: Ogoshi, A., Kobayashi, K., Homma, Y., Kodama, F., Kondo, N. and Akino, S. Sapporo, Japan.

Markham, J. H. 1997. Measuring and modeling plant neighbour effects: reply to Freckleton and Watkinson. Functional Ecology. 11: 534 - 535.

Markham, J. H. and Chanway, C.P. 1996. Measuring plant neighbour effects. Functional Ecology. 10: 548 - 549.

Markham, J. H. and Chanway, C.P. 1996. Alnus rubra inoculation capacity of soil under 5 species in harvested sites in coastal British Columbia. Plant and Soil. 178: 283 - 286.

Lazo, L., Markham, J. H. and Chapman, A. R. O. 1994. Herbivory and harvesting: effects on sexual recruitment and vegetative modules of Ascophyllum nodosum. Ophelia. 40: 95 - 113.

Lowell, R. B., Markham, J. H. and Mann, K. H. 1991. Herbivore-like damage induces increased strength and toughness in a seaweed. Proc. Roy. Soc. Lond. B. 243: 31 - 38. PDF version

Denton, A., Chapman, A. R. O. and Markham, J. H. 1990. Size specific concentrations of phlorotannins (antiherbivore compounds) in two species of Fucus. Mar. Ecol. Prog. Ser. 65:103-104.