By Oliver Gilbert, with assistance from Graham & Marilyn Band, Lindsey Berry, Heather Clarke, David Jordan, Shelagh McDonald, Christopher Nicholson, and Derek Whiteley.
Line Drawings by Heather Clarke.
Ecological Survey of the Porter Valley (2001)
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Overview This document presents an ecological survey of Porter Valley, detailing its biodiversity, geology, and conservation needs.
Executive Summary
- The report identifies and publicises the ecological capital of Porter Valley.
- It highlights the valley's gradient from urban to rural over 3 miles.
- The valley features a mix of designed landscapes and ancient woodlands.
- Six disused dams contribute to the valley's ecological richness.
- Wildlife includes species like grey squirrels, herons, and native freshwater crayfish.
- An Action Plan is proposed to address threats to biodiversity and improve management.
Introduction
- The survey was conducted by Friends of Porter Valley from 2000 to 2001.
- It covers the valley's ecology, archaeology, and user experiences.
- The valley is designated as Green Belt and an Area of High Landscape Value.
- It is recognized as a Key City Site with potential for increased visitor engagement.
Geology
- The valley is underlain by Carboniferous rocks, including Millstone Grit and Lower Coal Measures.
- Geological features include sandstone and shale, with notable fossil assemblages.
- The valley's geology influences its biodiversity and landscape features.
Biodiversity Habitats
- The valley contains ancient woodlands, scrub, grasslands, wetlands, and road verges.
- Ancient woodlands are at least 400 years old, supporting diverse flora.
- Grasslands include amenity leys, permanent pastures, and species-rich areas.
- Wet flushes and hedgerows contribute to the valley's ecological diversity.
Biodiversity Groups
- Mammals: Includes species like water voles and badgers.
- Birds: Notable species include kingfishers and dippers.
- Insects: The valley supports various butterflies and moths.
- Flora: The area is rich in flowering plants, ferns, and lower plants.
Site Evaluation
- The valley's ecological capital is significant for local biodiversity and public enjoyment.
- Certain features are under threat, necessitating conservation efforts.
Action Plan
- Major repair work is needed for the six dams to prevent loss of open water.
- A lottery grant will be sought for funding.
- Woodland management requires immediate implementation due to neglect.
- Monitoring of species-rich grasslands is essential to prevent deterioration.
- Path network extensions are needed to reduce congestion and improve access.
- Community involvement and education are key components of the action plan.