dc.contributor.advisor |
Hallett, Lauren |
|
dc.contributor.author |
Hernandez, Eliza |
|
dc.date.accessioned |
2021-11-23T15:11:05Z |
|
dc.date.available |
2021-11-23T15:11:05Z |
|
dc.date.issued |
2021-11-23 |
|
dc.identifier.uri |
https://scholarsbank.uoregon.edu/xmlui/handle/1794/26870 |
|
dc.description.abstract |
Conserving rare serpentine grasslands is a challenge with ongoing nitrogen deposition. Nutrient-poor patches are fertilized by nitrogen-rich smog and exotic grasses can rapidly spread. Water resources are also being altered in this system via climate change. Using a greenhouse experiment and a long-term survey, I test how rainfall variability interacts with nitrogen deposition to shift native patches to an exotic state. We found that wetter years interact with intermediate nitrogen to drive invasion. Restoring exotic-dominated patches is difficult once an established layer of litter reasserts exotic dominance. Capitalizing on a long-term dataset, I test burning and grazing as restoration tools to promote native forb recovery. I found that a burn and continual grazing is effective in controlling exotic cover and litter levels to restore invaded patches to a native state. As global change continues to reinforce exotic dominance, continual and well-timed management is necessary to maintain native serpentine grasslands.This thesis includes both previously published/unpublished and co-authored material. |
en_US |
dc.language.iso |
en_US |
|
dc.publisher |
University of Oregon |
|
dc.rights |
All Rights Reserved. |
|
dc.title |
Species Dynamics and Restoration in Rare Serpentine Grasslands under Global Change |
|
dc.type |
Electronic Thesis or Dissertation |
|
thesis.degree.name |
M.S. |
|
thesis.degree.level |
masters |
|
thesis.degree.discipline |
Environmental Studies Program |
|
thesis.degree.grantor |
University of Oregon |
|