Globally, agriculture has intensified during the past 50 years due to increased
mechanization, changes in the timing of farming operations, grassland conversion to …

Organisms often rely on environmental cues to make behavioral and life-history decisions.
However, in environments that have been altered suddenly by humans, formerly reliable …

When an animal settles preferentially in a habitat within which it does poorly relative to other
available habitats, it is said to have been caught in an “ecological trap.” Although the …

The influence of area and vegetation structure on breeding bird communities associated
with 24 Illinois grassland fragments (0.5—600 ha) was studied between 1987 and 1989 to …

▪ Abstract Natural ecological disturbance creates habitats that are used by diverse groups of
birds. In North America, these habitats or ecosystems include grasslands or prairies …

Many species of birds that depend on grassland or savanna habitats have shown
substantial overall population declines in North America. To understand the causes of these …

There is growing evidence that many species of birds have declined throughout the eastern
United States during the past 40 years. In many cases this decline involves groups of …

Meadows require regular harvesting (cutting) to avoid vegetation succession, and this is well
known to promote high plant diversity. The impacts of the harvesting process on animal, and …

Abstract State-level Breeding Bird Survey (1980–1998) and US Department of Agriculture
statistics were used to test the hypothesis that changes in agricultural land use within the …

Life-history traits associated with midwestern breeding bird population trends were
assessed using data from the North American Breeding Bird Survey (BBS). Analyses of BBS …