Understanding plant-soil-management interactions of Reynoutria spp. (knotweeds) to inform ecological restoration
department or school: Land and Food Systems, Faculty of
data provider: DSpace
degree campus: UBCV
creator: Jones, Vanessa L.
issued: 2022-12-22T21:18:00Z
issued: 2022
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: The management of knotweed species (Reynoutria spp.), aggressive clonal invasive plants of riparian areas, present unique management challenges, particularly within the province of British Columbia (BC) where a knowledge gap exists between field practitioners who work to control knotweed infestations and academic researchers who study them. Academic research on invasive plant management tends to apply a target-based lens, which limits our knowledge to effectively control invasive plants long-term. The primary objective of this research project was to shift this focus from a target-based approach to other often overlooked important relationships, such as plant-soil-management interactions. These are relationships that may reveal much needed solutions to effective long-term control and subsequent ecological restoration. Accomplishing this required a broad set of research questions: 1. Examining the soil microbial ecology of knotweed infestations and native salmonberry (Rubus spectabilis) dominated sites. We found that knotweed infestation altered the soil bacterial community, decreased arbuscular mycorrhizal fungi (AMF) abundance and increased phosphorus compared to soil from salmonberry; 2. Testing the efficacy of a non-chemical control method that could be used near waterways where herbicide use is restricted, wire mesh girdling. It was determined that wire mesh significantly reduced stem and patch height but did not eradicate knotweed infestations in a field setting after two years; and 3. Attempting to conduct a dose-response assay to test for resistance to glyphosate in knotweed. Invasive Plant Managers have been reporting cases of epinastic knotweed patches in BC for several years that seem unaffected by repeated annual herbicide treatment. Rhizomes were collected from two such epinastic populations in Port Alice and North Vancouver, BC. However, a series of climate events impacted the ability to conduct the necessary experiments, and resistance to glyphosate co…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/83481
note: UNDERSTANDING PLANT-SOIL-MANAGEMENT INTERACTIONS OF REYNOUTRIA SPP. (KNOTWEEDS) TO INFORM ECOLOGICAL RESTORATION by Vanessa L. Jones B.Sc., Trinity Western University, 2019 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in The Faculty of Graduate and Postdoctoral Studies (Plant Science) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) November 2022 © Vanessa L. Jones, 2022 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, the thesis entitled: Understanding plant-soil-management interactions of Reynoutria spp (knotweeds) to inform ecological restoration submitted by Vanessa L. Jones in partial fulfilment of the requirements for the degree of Master of Science in Plant Science Examining Committee: Jennifer Grenz, Assistant Professor, Department of Forest Resources Management and Applied Biology, Faculty of Forestry and Faculty of Land and Food Systems, UBC Co-supervisor David R. Clements, Professor, Biology, Trinity Western University Co-supervisor Jichul Bae, Agriculture and Agri-Food Canada Supervisory Committee Member Tara Martin, Professor, Department of Forest and Conservation Science, Faculty of Forestry, UBC Additional Examiner Additional Supervisory Committee Members: Mahesh K. Upadhyaya, Professor Emeritus, Department of Plant Science, Faculty of Land and Food Systems Supervisory Committee Member iii Abstract The management of knotweed species (Reynoutria spp.), aggressive clonal invasive plants of riparian areas, present unique management challenges, particularly within the province of British Columbia (BC) where a knowledge gap exists between field practitioners who work to control knotweed infestations and academic researchers who study them. Academic research on invasive plant management tends to apply a target-based lens, which limits our knowledge to effectively control invasive plants long-term. The primary objectiv…
has type: Thesis/Dissertation
date issued: 2023-05
is shown at: 10.14288/1.0422828
language: eng
degree discipline: Plant Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Grenz, Jennifer
contributor: Clements, David (David R.)
type: Text
identifier URI: http://hdl.handle.net/2429/83481