The ecology of the sand lizard (Lacerta agilis L.) in forestry plantations and comparisons with the common lizard (Lacerta vivipara Jacquin)

Dent, Susan (1986) The ecology of the sand lizard (Lacerta agilis L.) in forestry plantations and comparisons with the common lizard (Lacerta vivipara Jacquin). University of Southampton, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

The sand lizaard, Lacerta agilis has a restricted habitat range and distribution in Great Britain. It is regarded as an endangered species in this country. The ecology of L. agilis on heathland habitats within forestry plantations in southern Britain has been studied. Where possible, comparisons have been made with the common lizard Lacerta vivipara. The distribution of L. agilis within forest heathland habitats was affected by both the nature of the vegetational habitat and the shade produced by the surrounding trees. The distribution of L. vivipara was also influenced by these factors but to a lesser extent than L. agilis. L. vivipara was able to thermoregulate under a greater range of weather conditions than L. agilis. Individuals of L. vivipara could therefore be active for longer than those of L. agilis, both on a seasonal and a daily basis. The home ranges of L. agilis within forest heathland habitats were found to be in the same size range as those previously reported from open habitats. The density and age and sex structure of L. agilis populations within forest heathland habitats were studied. Experiments conducted in the laboratory showed that L. vivipara were equally active within shaded and non-shaded areas of an artificial habitat. However, feeding occurred most frequently in non-shaded areas. A strategy is suggested which could be used as a basis for the conservation of L. agilis within forestry plantations. The differences observed between L. agilis and L. vivipara are discussed. (D72152/87)