- 78 views
- 30 downloads
Theoretical Considerations For Biological Control: A Case Study with Scentless Chamomile
- Author / Creator
- Tomas de-Camino-Beck
The introduction of invasive species is a significant driving force of global change.
Weed scientists, resource managers, conservation and restoration biologists have
focused their attention on the control of invasive species trying to understand,
mitigate and prevent impacts of biological invasions. Biological control, the control of
invading organisms by means of their natural enemy, is one way to prevent impacts of
biological invasions. Mathematical models are a useful tool for the design of biological
control strategies. These models allow for the analysis of population growth and
spread, and for determination of aspects of the life cycle of the organisms which can
be manipulated to control populations. In this dissertation I use matrix models to
study the life history of invading organisms. First, a new method for the calculation of
an analytical net reproductive rate formula is derived. I show with examples how this
formula can be applied to study the control of invading organisms, particularly weeds.
I extend these results, to calculate a mean and variance of the generation time. Later
in the thesis, I use coupled map lattice models, a time and space discrete formalism,
to calculate rate of spread for scalar and matrix population models. I derive formulae
for the wave speed for constant and stochastic environments for coupled map lattices.
I then apply these to scentless chamomile, an invasive weed distributed all across
North America. The methods for calculation of net reproductive rate and generation
time, and formulae for rate of spread in coupled map lattices, are new to biological
invasions and biological control.
- Graduation date
- Type of Item
- Doctor of Philosophy in Environmental Biology and Ecology
- This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.