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Biodiversity Action Plan for the National Cycle Network ... - Sustrans

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Appendix 2 – Phase 1 and 2 habitat surveys methodology<br />

Phase 1 habitat survey<br />

This is <strong>the</strong> standard method <strong>for</strong> habitat survey in <strong>the</strong> UK. It is a qualitative method based on<br />

mapping <strong>the</strong> distribution of habitat types across a site by using <strong>the</strong> standard field<br />

methodology set out in <strong>the</strong> ‘Handbook <strong>for</strong> Phase 1 Habitat Survey – a technique <strong>for</strong><br />

environmental audit’ - Joint Nature Conservation Committee, 1990 (2003 edition).<br />

It aims to provide a record of <strong>the</strong> semi-natural vegetation and identify wildlife habitat on a<br />

site and is based principally on vegetation, augmented by topographic and substrate<br />

features. There are around 90 standard habitat types identified according to characteristic<br />

vegetation and o<strong>the</strong>r environmental features. Mapping of habitat types usually uses<br />

standardised colour codes.<br />

Extended Phase 1 survey<br />

Most Phase 1 habitat surveys will include surveys <strong>for</strong> vertebrate and invertebrate fauna as<br />

well as flora. This is known as an extended Phase 1 survey. This combined approach is<br />

likely to include protected, BAP, notable and even lists of species found or observed during<br />

<strong>the</strong> survey. The purpose of extending <strong>the</strong> habitat survey is to make sure that all features of<br />

conservation interest are identified as a purely botanical approach does not always highlight<br />

key features.<br />

Phase 2 survey<br />

Where fur<strong>the</strong>r detailed survey work is required, this is known as a Phase 2 survey. For<br />

vegetation, this is a (semi)quantitative method based on <strong>the</strong> <strong>National</strong> Vegetation<br />

Classification (NVC) system. For many faunal species, fur<strong>the</strong>r survey work usually follows set<br />

protocols that must be adhered to. These may include requiring licences, setting restrictions<br />

about when and how often to survey, appropriate methodologies and <strong>the</strong> extent of survey<br />

ef<strong>for</strong>t required.<br />

<strong>Sustrans</strong>’ <strong>Biodiversity</strong> <strong>Action</strong> <strong>Plan</strong> <strong>for</strong> <strong>the</strong> <strong>National</strong> <strong>Cycle</strong> <strong>Network</strong> (December 2007)<br />

53

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