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Effects of Human Land Use on the Activity, Diversity, and Distribution of Native Bats
Başlık:
Effects of Human Land Use on the Activity, Diversity, and Distribution of Native Bats
Yazar:
Turner, Tyler Norman, author.
ISBN:
9780438093577
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (131 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Karen Root Committee members: Kevin McCluney, PhD; Helen Michaels, PhD.
Özet:
Bats play critical roles in the numerous ecosystems they inhabit as nutrient cyclers, pollinators, and major sources of pest control. In agricultural landscapes, such as those in the Oak Openings, these services can be extremely valuable. Unfortunately, bats face population declines due to threats such as wind farms along migration routes, the lethal fungal disease white-nose syndrome, and habitat degradation and loss due to anthropogenic pressures. The objective of this study was to examine how native bats are using both natural and human dominated landscapes within this region while identifying features within these landscapes that promote bat activity and diversity. To do so I developed a three-part study to observe spatial and temporal trends. First, driving transects were conducted from May through September to analyze activity and diversity in three different landscape types (natural, mosaic, and agricultural landscapes). Second, paired stationary sites were set up overnight to compare core sites within Oak Openings Preserve to edge sites to assess how bats responded to areas of natural landscapes directly facing human pressure. Finally, with the help of citizen science volunteers, walking surveys were conducted through three different parks, as part of an ongoing project of the Root Lab at BGSU, to look at temporal trends in bat populations. Over the course of five months and more than 50 nights, I recorded and identified over 2,200 bat calls. The majority of these calls (95%) were dominated by just three bat species (big brown, silver-haired, and eastern red). I found a significant decrease in activity in agricultural landscapes (p=0.04, Pearson’s Test), compared to mosaic and natural landscapes. I also found certain landscape features, such as canopy cover and distance to riparian systems, were correlated with bat activity. Within the Oak Openings Park, I found that core natural sites had significantly more activity than edge or savanna sites. There was no difference between interior edges and exterior edges, suggesting human impact has little to do with how bats are using these edges. However, vegetation density and canopy cover were predictors of increased relative foraging activity, increasing our understanding of how the bats are using their environment. This finding suggests that both natural and human dominated landscapes can be managed to promote bat activity and diversity. This is important as there was evidence of long term population declines and declines in total number of observed species in the third study. By properly managing both natural and human dominated landscapes, we can help mitigate both current and future threats that bats may face.
Notlar:
School code: 0018
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(696309.1) | 696309-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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