Invasive Plant Task Force - James River Park System

Ancarrow's Landing/Manchester Slave Dock Study Area

Ancarrow's Landing/Manchester Slave Dock Study Area Map

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Study area summary

The Ancarrow’s Landing/Manchester Slave Dock study area includes approximately 40.1 acres of park land and was divided into four management units of various sizes. The lead organization for the baseline study of this park section was the James River Association. The task force field team in this study area identified a total of 21 invasive plant species across all management units, including:

  • 11 species ranked with high invasiveness;
  • 8 species ranked with medium invasiveness; and,
  • 2 species ranked with low invasiveness.

Due to extremely high densities of Chinese privet and Japanese honeysuckle, each of the four management units in this study area were observed with more than 75 percent cover (Cover Class 5) of invasive plants. In addition, three other invasive plants are considered dominant components of the overall forest community within one or more management units. Of these, tree-of-heaven was recorded with 20 to 50 percent coverage (Cover Class 3) in Management Unit 1. English ivy was dominant in Management Unit 2 and 3, and has nearly 100 percent coverage (Cover Class 5) in Management Unit 4. Japanese Hop was also dense in Management Unit 4, and was considered dominant due to a nearly 50 percent cover.

The density of non-native invasive plants within the overall study area also limited the amount of information recorded regarding native species within individual management units. However, based on prior knowledge, the forest canopy is generally similar to other natural upland island habitats located within the JRPS, with dominant canopy trees such as tulip tree, black walnut, American sycamore, green ash, red maple, and cottonwood. Notable populations of native herbaceous plants included common pokeberry (Phytolacca americana) in Management Unit 1 and 2, bear’s-feet (Smallanthus uvedalia) within Management Unit 3, and common blue violet (Viola sororia) in Management Unit 4. While considered a native plant in Virginia, common pokeweed was very dense in Management Unit 1 and 2, and may be considered for during Stage 3 control measures if the plant continues to proliferate.

ยป Phase One Baseline Study Data Summary (PDF)

Updates from the study area

None at this time.