Main content

Bed shear stress as a predictor of juvenile unionid habitat

Show full item record

Title: Bed shear stress as a predictor of juvenile unionid habitat
Author: Lum, Julian
Department: Department of Integrative Biology
Program: Integrative Biology
Advisor: Ackerman, Josef
Abstract: The association of bed shear stress (tb) and porewater chemistry with the settlement and persistence of juvenile unionid mussels was examined in the Sydenham River (southern Ontario). The law of the wall was applied to vertical velocity profiles to estimate tb at 118 locations, in which porewater was sampled and sediments excavated. Twenty-six juvenile unionids (< 30 mm long) from five species were found in quadrats with 0.07 ≤ tb ≤ 0.77 Pa and large amounts of sand and fine gravels (> 2 mm). Logistic regression (tb and tb2) indicated that the highest probability of juvenile presence was where tb = 0.4 Pa. Principal Component Analysis indicated that in addition to tb, porewater dissolved oxygen, pH, specific conductivity and temperature were associated as habitat characteristic. These results provide new insights into the location of juvenile unionids in riverbeds, their habitat characteristics, as well guidelines for their conservation and reintroduction.
URI: http://hdl.handle.net/10214/17811
Date: 2020-02
Rights: Attribution 4.0 International
Terms of Use: All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.


Files in this item

Files Size Format View
Lum_Julian_202002_MSc.pdf 1.307Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International