Trent University Graduate Thesis Collection

Item Description
Identifier
tula:etd
Type
Collection
Language
eng
Extent
1 item
Rights
Copyright for all items in the Trent University Graduate Thesis Collection is held by the author, with all rights reserved, unless otherwise noted.
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Discontinuities in stream networks: the effects of tributary size and type on benthic invertebrate communities downstream from confluences

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Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Brochu, Melissa, Thesis advisor (ths): Jones, Nicholas E, Thesis advisor (ths): Frost, Paul C, Degree committee member (dgc): Melles, Stephanie J, Degree granting institution (dgg): Trent University
Abstract: <p>The network composition hypothesis (NCH) suggests that i) large confluence symmetry ratios (drainage area of the tributary relative to the mainstem) and ii) landscape differences (differences in landscape characteristics between the mainstem and tributary drainages) lead to greater ecological changes below confluences. As a test of the NCH, 34 confluences were sampled in southern Ontario… more

Aquatic Invertebrate Studies from Two Perspectives: Function (Shredders) and Distribution (Dytiscidae)

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Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): DeGasparro, Sherri, Thesis advisor (ths): Beresford, David V, Thesis advisor (ths): Frost, Paul C, Degree committee member (dgc): Jones, Nicholas, Degree granting institution (dgg): Trent University
Abstract: <p>Leaf litter decomposition represents a major pathway for nutrient cycling and carbon flow in aquatic ecosystems, and macroinvertebrates play an important role in the processing of this material. To assess the causes of variable leaf breakdown and nutrient fluxes, I measured decomposition rates and the nutrient release ratios of decomposing leaf material across a broad latitudinal… more

Stoichiometric food quality affects responses of Daphnia to predator-derived chemical cues

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Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Bell, Alex T.C., Thesis advisor (ths): Frost, Paul C, Thesis advisor (ths): Murray, Dennis L, Degree committee member (dgc): Beresford, David V, Degree granting institution (dgg): Trent University
Abstract: <p>While both resource quality and predator-derived chemical cues can each have profound effects on zooplankton populations and their function in ecosystems, the strength and nature of their interactive effects remain unclear. We conducted laboratory experiments to evaluate how stoichiometric food quality (i.e., algal carbon (C):phosphorus (P) ratios) affects responses of the water flea,… more