| vegetation composition, dynamics, and management of a bracken-grassland and northern-dry forest ecosystem. | we investigated differences in vegetation composition and dynamics for two globally rare ecosystems, bracken-grasslands and northern-dry forests of northern wisconsin. these ecosystems commonly have been viewed as degraded pine barrens. bracken-grasslands contained a high dominance of exotic species, low native richness, and no obvious prairie species, suggesting logging-era anthropogenic origins. differences in cover for common plants among ecosystems were examined using mann-whitney u tests of ... | 2003 | 14565700 |