Habitat Suitability Index (HSI) Assessment


One of our experienced ecologists will undertake a great crested newt Habitat Suitability Index assessment in accordance with Oldham et al. (2000). An ecologist will survey, where possible, all ponds within a 250/500m radius of the proposed development site or suitable water bodies.

The ponds identified will be subject to an assessment during which a range of ten abiotict variables will be recorded, including: surface area; water quality; shading and the presence of emergent flora; macrophytes and fish.  These variables will be used to inform a calculation of the Habitat Suitability Index (HSI) for each waterbody.

The HSI assessment is a measure of the suitability of each waterbody to support great crested newts.  The results of this assessment will be used to inform the scope of great crested newt survey works if required.


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