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Response of Floodplain Bird and Butterfly Communities to Arundo donax Removal in Big Bend National Park, TX
Başlık:
Response of Floodplain Bird and Butterfly Communities to Arundo donax Removal in Big Bend National Park, TX
Yazar:
Coffey, Julie Ellen, author.
ISBN:
9780438069411
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (69 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Eric M. Wood Committee members: Andres Aguilar; Robert Nissen; Lars Y. Pomara.
Özet:
In riparian systems of the US desert southwest, the invasive plant Giant Cane (Arundo donax, hereafter A. donax) has colonized large sections of river floodplain, altering hydrologic regimes, displacing native plants, and reducing wildlife habitat. In one of the largest A. donax removal efforts in the southwest, US and Mexican partners are using prescribed fire and herbicide applications to remove A. donax along a 118-mile, bi-national reach of the Rio Grande/Bravo. Along with project collaborators, I completed a 2-year study to examine the response of birds and butterflies to A. donax management efforts. I used a space-for-time sampling design whereby, in May-July, 2016-2017, I surveyed sites that were last managed (hereafter, burned) three or fewer years prior to sampling (n = 26), four to eight years prior to sampling (n = 21), and unburned A. donax sites ( n = 11). I structured my sampling design to capture a succession gradient following management efforts. We found significantly less A. donax in burned sites relative to unburned, as well as twice the herbaceous plant cover in older relative to recently burned sites. We also noted a 25% increase in vegetation structure in older burned relative to unburned and recently burned sites. Further, bird abundance increased by 30% between recent and older burned sites, and bird richness was positively related to increased herbaceous plant and tree cover, as well as vegetation structure (adj. R2 = 0.19, p < 0.01). For butterflies, we found a 40% increase in richness between recently burned and older burned sites, and a similar increase in abundance. However, unburned A. donax sites had the highest abundance and diversity of butterflies in our study, likely because these habitats supported twice the flower abundance of older burned sites. Our results showed increased bird and butterfly diversity at burned sites following vegetation recovery, suggesting that removing A. donax promotes the recovery of floodplain biodiversity.
Notlar:
School code: 0962
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(691774.1) | 691774-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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