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2011

Erbilgin, N., Gregoire, J. C., Gilbert, M., Kausrud, K. L., Skarpaas, O., Stenseth, N. C., Okland, B.

Abstract: Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may be exhausted and the inner bark successfully colonized, killing...

2012

Landhäusser, S. M., Chow, P. S., MacKenzie, M. D., Pinno, B. D., Quideau, S. A.

Trembling aspen (Populus tremuloides) is an important tree species for land reclamation. This study determined trembling aspen germination, establishment, initial growth and response to fertilizer on contrasting oil sands reclamation soils. In a greenhouse, eight soils varying in total nitrogen...

2016-08-01

Musante, Glenna B.

Next weekend, when you are at the grocery store or out running errands, take a good look at the people around you—in particular, the ladies. Chances are that instead of seeing weekend jeans and tee shirts, you will see an increasing number of women wearing compressive yoga pants and capris with...

2008

Newman, S. C., Schopflocher, D.

Objective: To analyze trends in antidepressant (AD) prescription rates among the elderly (aged 65 years and older) in Alberta during 1997 to 2004. Method: Numerical data on AD prescriptions were obtained from Alberta Blue Cross. Age-standardized prescription rates were calculated according to...

2019-01-01

James, Patrick M.A., Huber, Dezene P.W.

Forest insects are showing increasing intensity of outbreaks and expanded ranges, and this has become a major challenge for forest managers. An understanding of these systems often depends upon detailed examination of complex interactions involving multiple organisms. In 2013, a team of...

2010

Hauer, G., Adarnowicz, W., Boutin, S., Schneider, R.

Prioritization of conservation efforts for threatened and endangered species has tended to focus on factors measuring the risk of extirpation rather than the probability of success and cost. Approaches such as triage are advisable when three main conditions are present: insufficient capacity...

2018-01-15

Khan, Amanda S., Chu, Jackson W. F., Leys, Sally P.

Sponges link the microbial loop with benthic communities by feeding on bacteria. Glass sponge reefs on the continental shelf of western Canada have extremely high grazing rates, consuming seven times more particulate carbon than can be supplied by vertical flux alone. Unlike many sponges, the...

2001-01-01

Khaled, Annette R., Moor, Andrea N., Li, Aiqun Q., Kim, Kyungjae, Ferris, Douglas K., Muegge, Kathrin, Fisher, Robert J., Fliegel, Larry, Durum, Scott K.

Trophic factor withdrawal induces cell death by mechanisms that are incompletely understood. Previously we reported that withdrawal of interleukin-7 (IL-7) or IL-3 produced a rapid intracellular alkalinization, disrupting mitochondrial metabolism and activating the death protein Bax. We now...

2004

Tonn, W. M., Klatt, P. H., Paszkowski, C. A., Gingras, B. A., Wilcox, K.

We compared trophic ecology of grebes inferred from stable-isotope analysis to that from gut contents, and compared isotopic ratios of Red-necked Grebes (Podiceps grisegena) from lakes differing in their food webs. Analyses of different grebe tissues (egg yolk and albumen, pectoral and leg...

2005

Wilkinson, S.R., Schmeigelow, F.K.A., Naeth, M.A.

Current theory on non-equilibrium communities, thresholds of irreversibility, and ecological resilience suggests the goal of ecological restoration of degraded communities is not to achieve one target, but to reestablish the temporal and spatial diversity inherent in natural ecosystems. Few...