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Birds in Flint Hills of Kansas, Oklahoma face population decline despite large habitat
Date:3/3/2009

The wide-open spaces of the Flint Hills may no longer provide a secure home on the range for several familiar grassland birds, according to research by a Kansas State University ecologist and her colleagues.

The researchers found that three bird species common to the Flint Hills region of Kansas and Oklahoma are experiencing serious population decline in the face of extensive land-management practices like annual burning and widespread grazing

The Flint Hills contain the largest remaining tracts of tallgrass prairie, a habitat that once covered much of the Great Plains but of which only 4 percent is now left, mostly in the Flint Hills. Far from being pristine prairie, however, the Flint Hills region supports a major cattle industry and is intensively managed.

"Because of its size, the Flint Hills is assumed to be a population stronghold for grassland birds," said Kimberly With, a K-State associate professor of biology who led the study. "Mostly this has been based on bird counts, but they can be misleading because they don't show what the region is capable of producing. Birds are very mobile and thus birds could come from elsewhere to give the appearance of a stable population year after year. This is especially true if the region attracts birds because of its size, but birds do not breed successfully once they settle here."

With was joined by ecologists Anthony King from the Oak Ridge National Laboratory and William Jensen, a former postdoctoral researcher in With's lab at K-State. They conducted a two-year study of regional viability of three grassland birds: the dickcissel, grasshopper sparrow and eastern meadowlark. With and her colleagues found that none of these bird species is viable in the 4 million-acre Flint Hills region. They estimated population declines of as much as 29 percent per year during the years studied.

The results were published in December 2008 in the journal Biological Conservation, '/>"/>

Contact: Kimberly With
kwith@k-state.edu
785-532-5040
Kansas State University
Source:Eurekalert  

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