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Full-Text Articles in Physical Sciences and Mathematics
Identification Of Thresholds In Benthic Macroinvertebrate Communities Associated With Agricultural Land Cover, Jeremy Peter Grimstead
Identification Of Thresholds In Benthic Macroinvertebrate Communities Associated With Agricultural Land Cover, Jeremy Peter Grimstead
Electronic Thesis and Dissertation Repository
Agricultural land use affects benthic macroinvertebrate (BMI) community structure but riparian forest may mitigate its impact to within a specific threshold. BMI communities were sampled in small streams within the Grand River, Thames River, and Long Point watersheds in southwestern Ontario. The study assessed the location and amount of agricultural land use associated with variation in BMI assemblage structure. Three land use distribution scenarios were evaluated to isolate specific ranges of agricultural land use at either the riparian or catchment scale, with the adjoining scale covering as wide a gradient of agricultural land use as possible. We did identify thresholds …
Temporal Variability In The Daytime Green Roof Energy Balance During Drying Periods, Dimuth C. Kurukulaarachchi
Temporal Variability In The Daytime Green Roof Energy Balance During Drying Periods, Dimuth C. Kurukulaarachchi
Electronic Thesis and Dissertation Repository
Green roofs are a building design element intended to increase evaporative cooling in cities during the summer, which helps alleviate the daytime impacts of heat on human health and energy consumption, and supports mitigation and adaptation to the local effects of climate change. Time varying energy balances were measured on a 0.15 m deep, ~ 60 m2 modular green roof with Sedum spurium in London, Ontario for the summer of 2014. A lysimetry approach was used to measure latent heat QE. Net radiation Q* and ground heat flux QG were also measured, with sensible heat …