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The effect of water velocity on carbon isotope fractionation of aquatic macrophytes

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dc.contributor.advisor Ackerman, Josef Harris, Lisa 2016-01-14T14:27:59Z 2016-01-14T14:27:59Z 2016-01 2016-01-08 2016-01-14
dc.description.abstract Smith and Walker (1980) proposed that the diffusive limitation of the boundary layer surrounding aquatic plants would limit carbon availability and result in less discrimination against 13C. I investigated this mechanism in a laboratory experiment with Vallisneria americana, a HCO3- user, and Sagittaria subulata, not known to use HCO3-, and a field study with V. americana in the Maitland River, Goderich, ON. The δ13C signatures of V. americana in the laboratory and field became significantly more negative with increasing velocity whereas those of S. subulata became more positive. The results for V. americana support Smith and Walker’s (1980) mechanism, however those for S. subulata were opposite, which is likely due to differences in carbon uptake mechanisms between the two species. When analyzing δ13C signatures of aquatic macrophytes, it is important to consider the fluid velocity, the photosynthetic mechanism and the type of carbon available. en_US
dc.language.iso en en_US
dc.publisher University of Guelph en_US
dc.rights Attribution 2.5 Canada *
dc.rights.uri *
dc.subject aquatic ecosystems en_US
dc.subject Vallisneria americana en_US
dc.subject Sagittaria subulata en_US
dc.subject Boundary layer en_US
dc.subject velocity en_US
dc.subject aquatic macrophytes en_US
dc.subject δ13C signature en_US
dc.subject isotope fractionation en_US
dc.subject food webs en_US
dc.title The effect of water velocity on carbon isotope fractionation of aquatic macrophytes en_US
dc.type Thesis en_US Integrative Biology en_US Master of Science en_US Department of Integrative Biology en_US University of Guelph en_US

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Attribution 2.5 Canada Except where otherwise noted, this item's license is described as Attribution 2.5 Canada
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