Mountaintop Removal Affecting Bird Populations

This is just out from the U.S. Geological Survey. Mountaintop mining is not only changing the landscape, it is, unsurprisingly, changing the ecology of the Appalachians. According to a new study published in Landscape Ecology, songbirds that thrive in forested areas are in decline in areas adjacent to reclaimed mountaintop removal mines, while birds that live in shrub lands are increasing in these areas.

            The results make sense on the face of things. Even when MTR mines are reclaimed, they are mostly large grassland areas devoid of trees. And as you can surmise, it will take a while for trees to take root, grow, and reach maturity in reclaimed mines. Most optimistically the forests will grow to maturity in the mines in a matter of a few decades, but in most cases it will probably take longer.

            Here are some details from the USGS news release:

The study evaluated the bird communities in the forest that remains around the reclaimed habitats in West Virginia and Kentucky. Researchers found that even small amounts of forest lost to mineland or grassland within a landscape resulted in lower abundance for the majority of bird species in the forest that remained adjacent to the reclaimed lands.  Declines in abundance were detected for 12 species of forest interior birds and 11 species of interior edge birds including species of conservation concern such as Cerulean Warbler and Worm-eating Warbler.  But the numbers of some species did go up.

“Some shrubland species, for example the brown thrasher and song sparrow, or forest generalist species such as the brown-headed cowbird and the yellow-throated vireo, did have a positive response to the loss of forest and the gain in mineland or grassland, but most bird species did not,” said Doug Becker, professor of biology at Kutztown University in Pennsylvania and senior author of the study.  “If managers want to take actions that may benefit sensitive, forest-dependent species, they need to minimize the amount of forest lost in a landscape.”

A reclaimed mountaintop mine. No trees here. photo: ovec.org

The Cerulean Warbler, one of the bird species in decline around the mountaintop removal mines photo: nc.audubon.org

Other ecological effects have been documented, including the recent finding that the mining was threatening rare endemic crayfish. And it is needless to say that for years and decades we will be finding even more effects that mountaintop removal coal mining has had on the lives of Appalachians and the environment of their mountains.

Mountains that have not been removed for their coal, where many songbirds want to live