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Full-Text Articles in Life Sciences
Spatial And Temporal Activity Of Migratory Bats At Landscape Features, Rachel M. Hamilton
Spatial And Temporal Activity Of Migratory Bats At Landscape Features, Rachel M. Hamilton
Electronic Thesis and Dissertation Repository
Geographical landmarks may be important features for navigation of migrating bats although spatial and temporal activity may depend on species-specific migration strategies. I predicted that latitudinal migrating bats would have higher activity along north-south oriented linear landscape features, especially during late-seasonal migration periods, compared to bat species that migrate within a regional area. I acoustically sampled four species of bats classified as latitudinal and regional migrants. I monitored twelve sites located in southwestern Ontario at four landscape features between May and October 2011. I found that specific landscape features may have greater importance to specific species rather than their migration …
Metals And Persistent Organic Pollutants As Ecological Determinants Of Human Health In Naivasha, Kenya, Chelsea R. Hicks
Metals And Persistent Organic Pollutants As Ecological Determinants Of Human Health In Naivasha, Kenya, Chelsea R. Hicks
Electronic Thesis and Dissertation Repository
The main industries in Naivasha are floriculture and geothermal energy, with both industries beginning in the 1980s. Increased employment caused a 20-fold increase in population over 3 decades. These changes have the potential to increase the release of environmental contaminants, such as metals and persistent organic pollutants (POPs). This study uses an ecosystem health approach to study the distribution and health risks associated with metals in airborne dust and POPs and metals in Cyprinus carpio dorsal muscle, in Naivasha, Kenya. Findings suggest that Ni in airborne dust may be derived from natural catchment substrate, but still exists at concentrations above …
Bats And The Landscape: The Influence Of Edge Effects And Forest Cover On Bat Activity, Meredith K. Jantzen
Bats And The Landscape: The Influence Of Edge Effects And Forest Cover On Bat Activity, Meredith K. Jantzen
Electronic Thesis and Dissertation Repository
The habitats in which bat species may most effectively forage are often determined by species-specific differences in wing morphology and echolocation call structure. Habitat edges are important for bat navigation and foraging, but no study to date has examined the depth of edge influence (DEI--the extent of quantifiable change in activity with distance from an edge) for bats. I predicted that DEI would vary with species-specific differences in wing structure and echolocation call characteristics. Additionally, because different habitats may be required to fulfill species’ foraging and roost requirements, I predicted that bat activity would be highest in areas with a …