Central Research Questions
Amanda Leisser's thesis explores the trends, population size, and spatiotemporal variation of the Euphydryas aurinia (Marsh fritillary) through the following questions: How do the size and fluctuations of E. aurinia populations change over time on Gotland? How does the population vary across different habitats and seasons? And what are the critical habitat features, and how do patch size and isolation impact population stability?
Background and Aims
Amanda Leisser's master's project focuses on the trends, population size, and spatiotemporal variation of the E. aurinia on Gotland, Sweden. This species is currently listed as Vulnerable (VU) and has experienced significant fluctuations in population size due to environmental changes. This research highlights the critical importance of understanding spatiotemporal variation and habitat requirements for the conservation of E. aurinia. These insights can guide targeted conservation efforts to support the long-term survival of this vulnerable species on Gotland.
Key findings
Population fluctuations: the E. aurinia population on Gotland exhibits significant annual fluctuations, influenced by environmental conditions such as rainfall and temperature.
Habitat preferences: the species thrives in open wetlands and fens with abundant host plants like Succisa pratensis (Devil's-bit Scabious). However, habitat quality and connectivity are crucial for its survival.
Impact of habitat isolation: populations in isolated habitat patches are more vulnerable to decline, emphasizing the need for connected networks of suitable habitats.
Conservation implications
Habitat management: effective conservation strategies must focus on maintaining and restoring open wetland habitats, controlling succession, and ensuring habitat connectivity.
Monitoring and adaptation: continuous monitoring and adaptive management are essential to respond to the population's dynamic nature and environmental changes.