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Providing evidence to improve practice

Individual study: Effects of water level management on usage by non-breeding American avocet Recurvirostra americana of coastal impoundments at South Island, South Carolina, USA

Published source details

Boettcher R., Haig S.M. & Bridges W.C. Jr. (1995) Habitat-related factors affecting the distribution of nonbreeding American avocets in coastal South Carolina. The Condor, 97, 68-81

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Manage water level in wetlands Bird Conservation

A trial in Janurary-May 1991-1992 at coastal impoundments and intertidal mudflats on South Island, South Carolina, USA (Boettcher et al. 1995), found that significantly higher numbers of American avocets Recurvirostra americana used the impoundments as water was drawn down over the spring, compared to mudflats, despite mudflats being significantly larger. Avocet distribution within impoundments was highest where water was 10-17 cm deep and 1-30% of the area was exposed; but lowest where there were high daily fluctuations in water depth. Water was slowly drawn down from impoundments from November to April, creating a wide range of water depths, before reflooding in June.