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Exotic vs. native: global and urban investigations of leaf litter decay in streams

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dc.contributor.author Kennedy, Kimberly Theresa May
dc.date.accessioned 2016-08-30T20:03:26Z
dc.date.copyright 2016 en_US
dc.date.issued 2016-08-30
dc.identifier.uri http://hdl.handle.net/1828/7504
dc.description.abstract Exotic species alter the streamside plant community by changing the resources available to the stream food web, causing cascading changes throughout the entire aquatic ecosystem. To better understand the impacts of exotic litter species on stream communities, investigations were made at global and local levels. A meta-analysis was performed to understand which environmental and litter quality factors impact native and exotic litter decay rates on the global scale. It was found that exotic species are likely to decay faster than native species at larger mesh sizes, and in warm temperature environments because high quality exotic leaves have a lower C:N ratio than native leaves. An urban litter decay experiment in Victoria, B.C. streams contrasting Alnus rubra, Salix sitchensis, Hedera sp., Rubus armeniacus and plastic trash found that trash decays more slowly than leaf litter, but leaf species all decay at the same rate, and stream invertebrates colonize all litter types equally. Significant differences in litter decay rates and invertebrate community alpha and Shannon diversities were also observed across the four different streams. The more that is learned about the impacts of exotic leaf litter, the better we are able to respond to keep streams as healthy and as biodiverse as possible. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.rights.uri http://creativecommons.org/licenses/by-nd/2.5/ca/ *
dc.subject Leaf decay en_US
dc.subject Invasive species en_US
dc.subject Meta-analysis en_US
dc.subject Hedera helix en_US
dc.subject Rubus armeniacus en_US
dc.subject Salix sitchensis en_US
dc.subject Alnus rubra en_US
dc.subject Urban streams en_US
dc.subject Plastic decay en_US
dc.subject aquatic invertebrates en_US
dc.subject C:N en_US
dc.subject C:P en_US
dc.subject leaf toughness en_US
dc.subject leaf mass area en_US
dc.subject stream temperature en_US
dc.title Exotic vs. native: global and urban investigations of leaf litter decay in streams en_US
dc.type Thesis en_US
dc.contributor.supervisor El-Sabaawi, Rana
dc.degree.department Department of Biology en_US
dc.degree.level Master of Science M.Sc. en_US
dc.identifier.bibliographicCitation Perreault, K. 2009. The effect of population density on dispersal and settlement in armadillidium vulgare. Thompson Rivers University, Kamloops, B.C. en_US
dc.description.scholarlevel Graduate en_US
dc.description.embargo 2018-08-10
dc.description.proquestcode 0329 en_US
dc.description.proquestcode 0793 en_US


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