Date of Award
Summer 2020
Rights
Access is available to all users
Date Available to Non-EWU Users
2022-08-14
Document Type
Thesis
Degree Name
Master of Science (MS) in Biology
Department
Biology
Abstract
Throughout the West, wetlands have been drained or filled in for agricultural or urban uses. Staff at Turnbull National Wildlife Refuge (TNWR) in Cheney work with local landowners to restore wetlands through excavation or flooding techniques. Unfortunately, TNWR staff cannot evaluate the wetlands to determine which technique is most successful. This thesis project compared the macroinvertebrate and plant communities and the limnological features of wetlands restored through excavation and flooding with those of unaltered, reference wetlands on TNWR. I hypothesized that the reference wetlands would hold water longest and would have higher plant diversity and macroinvertebrate diversity and abundance than restored wetlands. I also hypothesized that the invasive reed canary grass prevalence would be lowest in excavated wetlands. I evaluated eleven wetlands monthly (May – Sept. 2018, May – October 2019; four excavated, four flooded, three reference). While the reference wetlands held more water and had higher plant percent coverage than the restored wetlands, most other metrics did not differ between reference and restored wetlands. Plant and macroinvertebrate communities were more strongly influenced by season (time of collection), year, and the presence of a non-native fish than by wetland category. Collectively, these results confirm that both restoration techniques are effective at creating wetlands that are similar to wetlands than have never been altered for human use
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Recommended Citation
Clinkenbeard, Jade S., "Comparison of wetland restoration techniques in and around Turnbull National Wildlife Refuge, Cheney, WA" (2020). EWU Masters Thesis Collection. 638.
https://dc.ewu.edu/theses/638
Included in
Environmental Monitoring Commons, Terrestrial and Aquatic Ecology Commons, Water Resource Management Commons
