Biodiversity Net Gain

Biodiversity baseline surveys

A Biodiversity Baseline Survey is an initial assessment of the species, habitats, and ecosystems in a specific area before any significant development or interventions occur. It establishes a reference point against which future changes in biodiversity can be measured.

Our baseline surveys use the DEFRA biodiversity metric scheme to

  • Quantify the biodiversity value of a site

  • Identify key species, habitats, and ecosystem services to monitor

  • Calculate the number of biodiversity units the site can produce.

  • Assess habitat size, condition, distinctiveness, strategic significance, temporal risk, and spatial risk

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