| Autor: |
Svedarsky, W. Daniel, Westemeier, Ronald L., Robel, Robert J., Gough, Sharron, Toepher, John E. |
| Zdroj: |
Wildlife Biology; December 2000, Vol. 6 Issue: 4 p277-284, 8p |
| Abstrakt: |
Greater prairie-chickens Tympanuchus cupido pinnatusare grouse of the tallgrass prairie of North America. Their range expanded greatly following the spread of early European agriculture into the grasslands and logging in forested areas. When the optimum mix of cropland and grass was exceeded, their range generally contracted to the regions where climatic and/or soil factors favoured the retention of grassland. Historically they probably occurred in 20 states of the United States and four Canadian provinces, but presently they only occur in 11 states and no longer in Canada. Their current status throughout the range varies considerably depending on habitat conditions, population levels, management capabilities and local land-use economic factors. A variety of conservation efforts, including translocation, are underway in the states where they occur, the intensity of which is generally inverse to numbers remaining. Noteworthy, is the Conservation Reserve Program (CRP) which has increased grassland cover on private land through incentive payments. |
| Databáze: |
Supplemental Index |
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