| fragmention by agriculture influences reproductive success of birds in a shrubsteppe landscape. | shrubsteppe communities are among the most imperiled ecosystems in north america as a result of conversion to agriculture and other anthropogenic changes. in the intermountain west of the united states, these communities support a unique avifauna, including several species that are declining and numerous others that are of conservation concern. extensive research in the eastern and central united states and in scandinavia suggests that fragmentation of formerly continuous forests and grasslands ... | 2007 | 17494408 |