Over the past three centuries successive land-use decisions have led to significant changes in the composition and structure of the floristic resources at Evansburg State Park in southeastern Pennsylvania. A recent survey of the park identified 544 vascular plant species from 116 families and 337 genera across 26 distinct, yet extremely fragmented, plant communities. Slightly less than 66% of the recorded species are native to the eastern United States and only two species of concern were discovered. Forty-six species were added to the flora of Montgomery County. In addition, woody vegetation in seven mature forest types of the 16 naturally occurring community associations were sampled. A histogram of species importance across these sites reveals a trend towards increasing compositional homogeneity in forested areas. The remaining ten communities are anthropogenically influenced habitats which comprise 75% of the park's acreage, are scattered widely throughout the park, and contain a high percentage of non-native invasive species. A clear shift in the composition of the forested areas towards Acer saccharum and/or Acer rubrum dominated associations is already apparent and likely to persist given the magnitude of adverse events that continue to alter the landscape and disrupt successional processes.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 135 • No. 3