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2009-01-01

Reid, T.A., Cahill, J.F., Navabi, A.

Competition with weeds decreases crop yields globally. Breeding for competitive ability against elevated weed pressure can be difficult because the selection for specific traits which contribute to competitive ability may result in yield losses. The widely studied International Triticeae Mapping...

2020-06-11

Cahill, J.F.

Plant trait data collected and processed by the Cahill Lab in Experimental Plant Ecology. The core data was collected with funding provided by the Rangeland Research Institute, University of Alberta. Included are raw data for core plant traits, including root and leaf characteristics. Standard...

2006-01-01

Cahill, J.F., Ingersoll, C.M., Niesenbaum, R.A.

Simply visiting and manipulating plants in a way consistent with measurement in typical ecological studies influences the amount of leaf herbivory experienced by some plant species. We examined the mechanistic basis for why Apocynum cannabinum is particularly responsive to such visitation and...

1996-01-01

Casper, B.B., Cahill, J.F.

An experiment was conducted to determine if spatial nutrient heterogeneity affects mean plant size or size hierarchies in experimental populations of the weedy annual Abutilon theophrasti Medic. (Malvaceae). Heterogeneity was imposed by alternating 8 X 8 X 10 cm blocks of low and high nutrient...

2004

Paquet, P.C., Hik, D.S., Frame, P.F., Cluff, H.D.

Wolves (Canis lupus) on the Canadian barrens are intimately linked to migrating herds of barren-ground caribou (Rangifer tarandus). We deployed a Global Positioning System (GPS) radio collar on an adult female wolf to record her movements in response to changing caribou densities near her den...

2005-01-01

Kembel, S.W., Cahill, J.F.

Many plants proliferate roots in nutrient patches, presumably increasing nutrient uptake and plant fitness. Nutrient heterogeneity has been hypothesized to maintain community diversity because of a trade-off between the spatial extent over which plants forage (foraging scale) and their ability to...

1998-01-01

Cahill, J.F., Casper, B.B.

An experimental approach was used to examine the effects of spatial nutrient heterogeneity and planting density on the sizes of plants within populations of Abutilon theophrasti. Planting locations were generated using random numbers and replicated among populations growing on two different...

2003-01-01

Brown, M., Hik, D.S., Weir, J., Dabros, A., Cahill, J.F.

Various effects on plant growth associated with handling or touching plants are well documented from greenhouse and laboratory studies, but are generally unknown or ignored under field conditions. We examined the prevalence of the effects of handling, at levels typical of many ecological...

2008-01-01

Lamb, E.G., Cahill, J.F.

We examined whether the intense root competition in a rough fescue grassland plant community in central Alberta, Canada, was important in structuring plant species diversity or community composition. We measured competition intensity across gradients of species richness, evenness, and community...

2008

Cluff, H.D., Frame, P.F., Hik, D.S.

Reproductive success of mammals is greatly influenced by food availability. Where wolves (Canis lupus) prey on migratory barren-ground caribou (Rangifer tarandus), caribou migration patterns strongly influence food availability for wolves. However, industrial development in formerly undeveloped...