Abstract
Plant species composition, dominance, richness, and diversity were measured across a 15-year chronosequence of created wetland sites in Virginia, USA. Using an age-class categorization (1–2 years, 3–5 years, 6–10 years, or 11–15 years), all classes had a predominance of herbaceous species with perennial life history strategy, and perennials contributed 68.6 % to the overall dominance measure (importance value; IV) averaged across all sites. There was no significant difference in species richness or diversity among age classes. Analysis of Similarity (ANOSIM) indicated that herbaceous species composition was similar between the youngest and oldest age classes, but not the intermediate classes. For woody shrubs and saplings, planted species were more prevalent in the youngest age classes, and volunteer species predominated in the oldest age classes. These results suggest that perennial herbaceous species are important in early plant development on created wetland sites, and may be influential in observed patterns of species composition over time. In the context of plant development in newly created wetlands, dominance shifts from planted to volunteer woody species suggest that planting early successional species, or species with reproductive strategies attuned to created wetland site management, may favor survivorship and recruitment of other species over time.
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Acknowledgments
The authors wish to thank Dr. Donna M. E. Ware for help with verification of the collections, Mr. Steve Russell, Mr. Leo Snead, and the Virginia Department of Transportation for use of the sites and for filling informational gaps, and Dr. Gene M. Silberhorn for botanical assistance in the overall project. We would also like to thank Mr. Keith Goodwin, Dr. Johan F. Gottgens, and two anonymous reviewers for comments on the manuscript. This is VIMS contribution number 3,229.
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DeBerry, D.A., Perry, J.E. Vegetation dynamics across a chronosequence of created wetland sites in Virginia, USA. Wetlands Ecol Manage 20, 521–537 (2012). https://doi.org/10.1007/s11273-012-9273-3
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DOI: https://doi.org/10.1007/s11273-012-9273-3