رسالة جامعية
The Role of Plant-soil Feedback in the Invasion of Brachypodium sylvaticum in Douglas-fir Forests
| العنوان: | The Role of Plant-soil Feedback in the Invasion of Brachypodium sylvaticum in Douglas-fir Forests |
|---|---|
| المؤلفون: | Esterson, Andrew |
| المساهمون: | Kaye, Tom, Lauchenbruch, Barb, Jones, Andy, Kiser, Jim, Botany and Plant Pathology, Oregon State University. Graduate School |
| بيانات النشر: | Oregon State University |
| المجموعة: | ScholarsArchive@OSU (Oregon State University) |
| مصطلحات موضوعية: | Douglas fir -- Weed control, Brachypodium -- Soils, Invasive plants -- Control, Soil microbiology, Plant-soil relationships, Bacterial communities, Brachypodium -- Control |
| الوصف: | Invasive plants have the capacity to transform landscapes and alter ecosystem function, causing significant economic and ecological damage. These effects include displacement and reduction of native flora and fauna, altered fire regimes, modification of biotic and abiotic soil properties, as well as local, regional, and global economic impacts. With such large impacts it is important that we better understand invasion dynamics to help with prevention, control and mitigation of invasive species. One process that has been associated with plant invasion is plant-soil feedback (PSF). A PSF occurs when plants alter biotic and abiotic soil properties through a variety of root exudates and litter decomposition such that subsequent plant growth is either positively or negatively affected. Positive conspecific and negative heterospecific responses have been theorized to be invasive species traits that promote invasion. Once an invasive species is removed from a system, there is a chance that PSFs generated by that species will persist in the soil, which is often referred to as 'plant legacies' or 'legacy effects' and may negatively influence restoration efforts. In the U.S. Pacific Northwest (PNW), Brachypodium sylvaticum (slender false brome), a perennial bunch grass native to Eurasia, is listed as a quarantined invasive species in California, Oregon, and Washington. Currently, B. sylvaticum is in the midst of rapid population growth and range expansion with populations in New York, Virginia, and Ontario, Canada. With a quickly expanding range research is critical for successful efforts to reduce the spread of B. sylvaticum. We developed two experiments to determine if PSF is a contributing factor to B. sylvaticum invasion in PNW forests. We hypothesized that 1) B. sylvaticum has positive conspecific and negative heterospecific PSF, 2) native species PSF has no effect on B. sylvaticum, and 3) PSF generated by B. sylvaticum will persist in the soil once removed, but over time, response of native species, soil nutrients ... |
| نوع الوثيقة: | master thesis |
| اللغة: | English unknown |
| العلاقة: | https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/wm117s58rTest |
| الإتاحة: | https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/wm117s58rTest |
| حقوق: | All rights reserved |
| رقم الانضمام: | edsbas.F0DA4F23 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |