Plants, insects and birds in semi-natural pastures in relation to local habitat and landscape factors
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Published source details
Söderström B., Svensson B., Vessby K. & Glimskär A. (2001) Plants, insects and birds in semi-natural pastures in relation to local habitat and landscape factors. Biodiversity and Conservation, 10, 1839-1863.
Published source details Söderström B., Svensson B., Vessby K. & Glimskär A. (2001) Plants, insects and birds in semi-natural pastures in relation to local habitat and landscape factors. Biodiversity and Conservation, 10, 1839-1863.
Actions
This study is summarised as evidence for the following.
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Protect in-field trees Action Link |
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Reduce grazing intensity on grassland by reducing stocking density Action Link |
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Protect in-field trees
A replicated, site comparison study in 1997 in 20 pastures in the Uppsala region, Sweden (Söderström et al. 2001) found that where more trees and trees of more species had been retained in pastures, butterfly species richness was higher, but richness was lower when a high proportion of those trees were large. There was higher butterfly species richness in pastures with more trees and with more species of tree. However, there was lower species richness when a greater proportion of the trees were large (>30 cm diameter at breast height). All data presented as model results. Butterflies were surveyed along the borders of a 100 m2 square walking transect in 20 grazed semi-natural pastures, repeated 18 times/pasture in July 1997. Tree cover was assessed using maps, aerial photos and field surveys, and tree species and diameter were assessed in the field.
(Summarised by: Eleanor Bladon)
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Reduce grazing intensity on grassland by reducing stocking density
A replicated, site comparison study in 1997 in 20 pastures in the Uppsala region, Sweden (Söderström et al 2001) found that on pastures with lower grazing intensity, butterfly species richness was higher. In pastures with lower grazing intensity butterfly richness was higher (data presented as model results). Pastures were mostly cattle-grazed annually from May–October. Grazing intensity was measured as the proportion of grass shorter than 5 cm throughout the period. Grass height was estimated three times in May–June 1997 in 1-ha quadrats covering the whole of each of 20 grazed semi-natural pastures. In July 1997, butterflies were surveyed along the borders of a 100 m2 square walking transect in pastures, repeated 18 times/pasture.
(Summarised by: Eleanor Bladon)
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