Name:
Eupatorium serotinum - Verbesina alternifolia Depositional Bar Alliance
Reference:
NatureServe Biotics 2019
Description:
This alliance consists of vegetation of active shorelines and depositional bars of streams and rivers in the Central Appalachians and Interior Low Plateau. Examples occur on sandy riverbanks and depositional bars, as well as in sand deposits on bedrock floodplains and boulder bars. The vegetation is maintained by periodic flooding, and flood dynamics vary from low to high rates of sediment erosion and turnover. These habitats experience high rates of sediment erosion and turnover during even moderate floods and are inundated for 3-12% of the year, but are generally exposed for most of the growing season. Vegetation may be sparse during years of more continuous high water during the growing season. In normal growing seasons, the vegetation is a dense growth of tall (1-2 m), fast-growing annual and perennial forbs. There may be some spatial separation within stands between perennial forbs, found on more stable shores and bars, and weedy annuals, found on high-gradient reaches that experience high rates of sediment erosion and turnover. Examples may have a very high cover of weedy and invasive species. Some typical components include <i>Amaranthus spinosus, Artemisia annua, Datura stramonium, Eupatorium serotinum, Polygonum lapathifolium, Polygonum pensylvanicum, Polygonum punctatum, Teucrium canadense, Verbesina alternifolia</i>, and <i>Verbena urticifolia</i>, which are relatively constant and generally contribute most of the cover. Additional, less constant or abundant species include <i>Polygonum cespitosum var. longisetum, Conoclinium coelestinum, Perilla frutescens, Chenopodium ambrosioides, Mollugo verticillata, Solanum ptycanthum, Verbena hastata, Urtica dioica ssp. dioica, Solanum carolinense</i>, and <i>Hibiscus laevis</i>. Herbaceous vines may also be numerous, with <i>Calystegia sepium, Cynanchum laeve</i>, and <i>Cuscuta gronovii</i> most frequent. Scattered individuals of shrubby to full-sized flood-tolerant trees (e.g., <i>Platanus occidentalis, Acer saccharinum</i>), as well as saplings of <i>Betula nigra</i> may be present.
Accession Code:
urn:lsid:vegbank.org:commConcept:38328-{5FF9E7B0-5450-440C-B52E-C34417A4F9ED}
Plot-observations of this Community Concept:
0
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