Surface mining often changes the native landscape and vegetation of an area.
Reclamation is used to counter this change, with the goal of restoring the land to its
original pre-mined state. The process of reclamation creates early successional-stage
lands, such as grasslands, shrublands, and wetlands, attracting new plant and animal
species to the area. I compared avian species density (number of individuals/ha),
diversity (H'), and richness (number of species/ha) on reclaimed and non-mined lands at
TXU's Big Brown Mine in Fairfield, Texas. I also compared my results to those of a
previous study conducted 25 years earlier. Avian counts were conducted using a fixedradius
point-count method on 240 points placed in four different vegetation types and in
four land-age groups (time since being reclaimed). Vegetation was measured both
locally, and at a landscape level. Overall bird species density did not exhibit a clear
relationship on non-mined versus reclaimed land. Overall bird species diversity was
greater on non-mined lands, whereas overall species richness was greater on reclaimed
lands. My results demonstrated a lower mean/point bird density and higher mean/point
bird diversity than were found 25 years earlier. Different nesting guilds occurred on the
reclaimed lands than occurred on the non-mined lands. Results suggested different species were attracted to the several successional stages of reclaimed lands over the nonmined
lands, which consisted of climax vegetation. The different successional stages of
reclaimed lands increased overall diversity and richness of the landscape as a whole.
Five bird species of conservation concern were observed in the study, all of which
occurred on reclaimed land. Four of the five species primarily occurred on reclaimed
lands. Future land management should include conserving different successional-stage
lands to increase overall biotic diversity and richness of mined land, preserving
reclaimed habitat for species of concern, and educating future private landowners on the
importance of maintaining vegetative and bird species diversity.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/4202 |
| Date | 30 October 2006 |
| Creators | Wenzel, Dawn Nicole |
| Contributors | Silvy, Nova J. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Electronic Thesis, text |
| Format | 1377124 bytes, electronic, application/pdf, born digital |
Page generated in 0.0024 seconds