Browsing Biology, Department of by Author "Grogan, Paul"
Now showing items 1-8 of 8
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As Above so Below? - Impacts of Water Limitation on Growth and Nutrient Accumulation of a Crop Plant and its Soil Microbes Across a Fertility Gradient
Ivens, HarrisStrategies to increase crop yields and drought stress tolerance are urgently needed to meet future global food demands in a changing climate. Although the effects of fertilizer application and drought stress in agriculture ... -
Controls on Seasonal Nitrogen Cycling in Canadian Low Arctic Tundra Ecosystems
Buckeridge, Kathleen (2009-09-27)Soil nitrogen availability to plants is a fundamental control on the structure and functioning of arctic tundra ecosystems. Despite recent evidence that biogeochemical and microbial dynamics during the non-growing season ... -
Evaluation and Improvement of the Stoichiometric Homeostasis Model for Understanding and Predicting the Structure and Functioning of a Low Arctic Tundra Plant Community
Gu, QianArctic tundra vegetation structure profoundly affects ecosystem processes and climatic regulation. Therefore, there is a growing urgency for more accurate biogeochemical models to better understand how tundra vegetation ... -
Integrating the effects of climate change and caribou herbivory on vegetation community structure in low Arctic tundra
Zamin, Tara (2013-06-07)Arctic tundra vegetation communities are rapidly responding to climate warming with increases in aboveground biomass, particularly in deciduous shrubs. This increased shrub density has the potential to dramatically alter ... -
Seasonal Controls on Litter and Soil Carbon and Nutrient Cycling in Arctic Tundra Ecosystems and Potential Impacts of Climate Change
Christiansen, Casper Tai (2016-01-29)Climate change is leading to warmer temperatures and greater snowfall in Arctic regions. Microbial decomposition activities are strongly regulated by temperature, and therefore climate warming is projected to enhance decay ... -
Shrub expansion in the low Arctic: The influence of snow and vegetation feedbacks on nitrogen cycling
Vankoughnett, Mathew (2009-09-19)Climate change has coincided with expansion of deciduous shrub species in the Arctic. Increased deciduous vegetation in the tundra could have profound implications on regional climate, carbon balance, and biogeochemical ... -
Soil carbon and nitrogen dynamics along replicated chronosequences of abandoned agricultural lands in southeastern Ontario
Foote, Robyn Louise (2007-12-20)Widespread abandonment of agricultural land has occurred in northeastern North America over the past two centuries. Soil carbon often increases as sites naturally regenerate towards perennial grasslands or forests. ... -
Warming and Chronic High Nutrient Manipulations Yield Differing Legacy Effects on the Soil Microbial Community and Nutrient Pools in the Low Arctic
Wright, Veronika (2016-08-05)Climate warming is predicted to increase summer air temperatures in the Arctic, warming soils and enhancing microbial decomposition of soil organic matter. Given the size of the soil carbon stores in the Arctic, even a ...