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Burnet moths: what do they want? Camilla Sarin

Burnet presence. 10. 30. 50. Burnet moths: what do they want? Camilla Sarin Final thesis, International Master’s Programme in Ecology and the Environment 2009 Supervisor: Karl-Olof Bergman. Background. Burnet moths (Zygaenidae) are declining in Europe .

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Burnet moths: what do they want? Camilla Sarin

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  1. Burnet presence 10 30 50 Burnet moths: what do they want? Camilla Sarin Final thesis, International Master’s Programme in Ecology and the Environment 2009 Supervisor: Karl-Olof Bergman Background • Burnet moths (Zygaenidae) are declining in Europe. • Main reason: loss of appropriate habitat types, e.g. semi-natural grassland. • Effective conservation plans require knowledge of a species’ habitat preferences; for several life stages and at different spatial scales. • Aim • Find the habitat requirements of Zygaena filipendulae, Zygaena lonicerae and Zygaenaviciae • during different life stages and… • at two spatial scales • Preserve sites with a high cover of host plants and nectar sources. • Manage areas to keep them open and sunny, and to prevent grass domination. • Execute management with care (or late in the season) to not harm Z. filipendulae pupae or reduce substrates suitable for pupation. • Preserve and restore semi-natural grasslands to promote burnet presence on a larger scale. Implications for conservation ? Methods Results Small scale Larval host plants. Larvae: surrounded by a higherdensityof larval host plants than average, and than pupae or adults. Pupae: found inhigher vege-tation than larvae or adults. Adults:found in more sun than average, mainly on red and violet composite flowers such as Cirsium and Centaurea. Nectar plants. Large scale Positive relationship between burnet moths and the area of meadows and pastures in southern Sweden. • Smallscale • Measurements of habitat variables: • Larval host plants • Nectar sources • Vegetation height • Cover of bare ground & dry grass • Sun exposure • Large scale • GIS analyses: area of meadows and pastures in southern Sweden vs. burnet presence/absence. Z. lonicerae Z. filipendulae Z. viciae T. medium/pratense L. corniculatus Vicia spp. Probability offinding Zygaena filipendulae Probability of finding burnets (%) Probability of finding Zygaena lonicerae Probability of finding Zygaena viciae Cirsiumarvense Centaurea jacea

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