Matthews, E.R. (corresponding author, email@example.com); Peet, R.K. (firstname.lastname@example.org) & Weakley, A.S. (email@example.com): Curriculum for the Environment and Ecology, CB#3275, University of North Carolina, Chapel Hill, NC 27599-3280, USA
Classification and description of alluvial plant communities of the Piedmont region, North Carolina, USA
Article first published online: 1 SEP 2011
© 2011 International Association for Vegetation Science
Applied Vegetation Science
Special Issue: Including Special Feature on Vegetation Survey: Edited by Milan Chytrý, Joop H.J. Schaminée & Angelika Schwabe
Volume 14, Issue 4, pages 485–505, October 2011
How to Cite
Matthews, E. R., Peet, R. K. and Weakley, A. S. (2011), Classification and description of alluvial plant communities of the Piedmont region, North Carolina, USA. Applied Vegetation Science, 14: 485–505. doi: 10.1111/j.1654-109X.2011.01150.x
- Issue published online: 1 SEP 2011
- Article first published online: 1 SEP 2011
- Received 29 September 2010, Accepted 1 June 2011
- Cluster analysis;
- Fluvial geomorphology;
- Random forests;
- US National Vegetation Classification;
Questions: What are the alluvial vegetation types of the North Carolina Piedmont? How is species composition related to site conditions?
Location: Catawba, Yadkin-PeeDee, Cape Fear, Neuse and Tar-Pamlico River Basins, North Carolina Piedmont region, southeast USA.
Methods: We recorded 194 alluvial vegetation plots. Vegetation types were derived using flexible β-hierarchical cluster analysis and random forests classifiers to reassign misclassified plots. We used canonical correspondence analysis to show the relationship between species composition and key environmental variables.
Results: Twelve forested vegetation types and two herbaceous types were distinguished, nested within a hierarchical classification structure ive higher-level groups. The five mega groups describe broad geomorphic–floristic conditions, whereas the narrower vegetation types characterize finer-scale floristic variation. Floristic variation is related to stream order and soil chemistry (pH and Ca:Mg ratio), as well as soil texture variables (percentage sand and percentage clay). We present a summary of floristic composition and structure, environmental setting and geographic distribution for each of the 14 vegetation types.
Conclusions: We suggest recognition of 14 alluvial vegetation types in the North Carolina Piedmont. In comparing our vegetation types with the community concepts currently recognized in the US National Vegetation Classification, some of our types fit well within recognized NVC associations, whereas others deviate sharply from established types, suggesting the need for reworking the currently recognized NVC alluvial type concepts.