Case Study:
Charlotte’s Wood
Location: Somerset, UK
Area: 2 hectares
Habitat: Wet woodland, floodplain meadow
Number of Trees: 23,959
Project Focus: Biodiversity Net Gain
Wet woodland creation
Miyawaki Method plantation
Floodplain meadow
Wildlife pond
Reedbed and aquatic marginal plants
BNG UPLIFT – 94%
Area: 2 hectares
Habitat: Wet woodland, floodplain meadow
Number of Trees: 23,959
Project Focus: Biodiversity Net Gain
Wet woodland creation
Miyawaki Method plantation
Floodplain meadow
Wildlife pond
Reedbed and aquatic marginal plants
BNG UPLIFT – 94%
Site History
This site is situated on the Somerset Levels and was formerly a willow plantation that was subsequently turned into grazing pasture. It remains underwater for a couple of months of the year so had only limited use for grazing. The site was predominantly rye grass with some rush patches and the baseline survey showed limited botanical and invertebrate interest.
Project Design
A mixed wet woodland planting scheme was designed using the Miyawaki Method, where saplings are planted at much higher densities to mimic natural regeneration processes. The species selection was tailored to the conditions onsite, and consisted of predominantly black poplar, alder, and willow species. Bird cherry and wayfaring trees were included to increase nectar and pollen availability for insects. A mixture of whips, feathereds, and standards were used to accelerate forest establishment by creating a vertical canopy structure from the outset. A pond was created in the middle of the site to attract aerial invertebrates and to aid water retention during dry periods, and a floodplain meadow mix was sown around the tree plantation areas.
Click image to expand.
Click image to expand.
Project Implementation
The project was started in 2020, by taking a hay crop from the field, which was then used as a mulch for the Miyawaki Method planting. The field was ploughed to aid in seeding, then a pond was dug in the centre, and the drains on the edge of the site were cleared. The trees were planted into the mulch and wetland specialist wildflower seed sown around the edge to create a floodplain meadow. Aquatic marginal plants were transplanted around the pond to provide shelter for invertebrates and amphibians.
Project Results
The estimated BNG uplift at Charlotte’s Wood is 10 units (94%). The trees have shown extraordinary growth rates due to the planting technique and the suitability of the species selected to the environmental conditions. Pond water sampling has shown a very healthy mix of aquatic invertebrates, and it is also home to numerous damselflies and dragonflies and rare water violet plants. The meadow has red campion, ragged robin, meadowsweet, and purple loosestrife, which has attracted a high diversity of butterflies including brown argus. The meadow area has supported a population explosion of voles, providing food for nearby kestrels and barn owls.