Preliminary ecological appraisal
Assessing the biodiversity value of a site for planning
As part of the planning process, local planning authorities will expect the applicant to consider a site’s biodiversity value. A preliminary ecological appraisal (PEA) is the first stage in assessing the site’s biodiversity value. It outlines potential ecological constraints, identifies any habitat features and recommends mitigation actions. ADAS ecologists are qualified to undertake PEAs following CIEEM Technical Guidance.
A PEA comprises two distinct parts
- A desk study to search for records of any protected species or habitats within the area.
- A walkover of the site to evaluate and map the habitats present and to assess any suitability for protected species such as great crested newts or bats.
Depending on the results and what is discovered, we may recommend further surveys to investigate impacts on a particular species. As well as being highly skilled ecology professionals, we take a pragmatic and practical approach to ecological issues on a site from the earliest stage possible. We pride ourselves in offering sustainable solutions.
When to carry out a PEA
April to September is the optimum time to carry out a PEA; however, it is possible to do at any time of year.
As the PEA provides the baseline ecological data for a site, it is important to get it right and allow time for any further recommended ecology surveys.
This is particularly important because of the seasonal constraints of many protected species.
A PEA as part of an ecological impact assessment
If required, a PEA can be supplemented with further survey information (e.g., protected species survey results) to form an ecological impact assessment (EcIA) for planning. It addresses, in more detail, the legislation and planning policy relevant to the ecological constraints affecting the development. It also assesses the overall impact of the development and provides recommendations for mitigation.
The recommendations will show that the project can meet any biodiversity obligations and, hopefully, lead to a successful planning outcome. In addition to this, an EcIA can also be presented in the environmental statement chapter of an Environmental Impact Assessment.