Definition of Favourable Conservation Status for Round-mouthed Whorl Snail, Vertigo genesii.
Abstract
This document sets out Natural England's view on Favourable Conservation Status (FCS) for Vertigo genesii in England. Favourable conservation status is defined in terms of 3 parameters: natural range and distribution; population; and extent and quality of habitat necessary for long-term maintenance of populations. Section 2 provides the summary definition of favourable conservation status in England. Section 3 covers contextual information, section 4 the units used, and section 5 describes the evidence considered when defining favourable conservation status for each of the three parameters. Section 6 sets out the conclusions on favourable values for each of the 3 parameters.