Suchergebnisse

Currently, we are experiencing biodiversity loss on different spatial scales. One of the best studied taxonomic groups in decline is the butterflies. Here, we review evidence for such declines using five systematic studies from southern Sweden that compare old butterfly surveys with the current situation. Additionally, we provide data on butterfly and burnet moth extinctions in the region's counties. In some local areas, half of the butterfly fauna has been lost during the last 60-100 years. In terms of extinctions, counties have lost 2-10 butterfly and burnet moth species. Land use has changed markedly with key butterfly habitats such as hay meadows disappearing at alarming rates. Grazed, mixed open woodlands have been transformed into dense coniferous forests and clear-cuts and domestic grazers have been relocated from woodlands to arable fields and semi-natural grasslands. Ley has increased rapidly and is used for bale silage repeatedly during the season. Overall, the changed and intensified land use has markedly reduced the availability of nectar resources in the landscape. Species that decline in Sweden are strongly decreasing or already extinct in other parts of Europe. Many typical grassland species that were numerous in former times have declined severely; among those Hesperia comma, Lycaena virgaureae, Lycaena hippothoe, Argynnis adippe, and Polyommatus semiargus. Also, species associated with open woodlands and wetlands such as, Colias palaeno, Boloria euphrosyne and the glade-inhabiting Leptidea sinapis have all decreased markedly. Current management practise and EU Common Agricultural Policy rules favour intensive grazing on the remaining semi-natural grasslands, with strong negative effects on butterfly diversity. Abandoned grasslands are very common in less productive areas of southern Sweden and these habitats may soon become forests. There is an urgent need for immediate action to preserve unfertilized, mown and lightly grazed grasslands. It is also crucial to encourage that management of ...

Currently, we are experiencing biodiversity loss on different spatial scales. One of the best studied taxonomic groups in decline is the butterflies. Here, we review evidence for such declines using five systematic studies from southern Sweden that compare old butterfly surveys with the current situation. Additionally, we provide data on butterfly and burnet moth extinctions in the region's counties. In some local areas, half of the butterfly fauna has been lost during the last 60-100 years. In terms of extinctions, counties have lost 2-10 butterfly and burnet moth species. Land use has changed markedly with key butterfly habitats such as hay meadows disappearing at alarming rates. Grazed, mixed open woodlands have been transformed into dense coniferous forests and clear-cuts and domestic grazers have been relocated from woodlands to arable fields and semi-natural grasslands. Ley has increased rapidly and is used for bale silage repeatedly during the season. Overall, the changed and intensified land use has markedly reduced the availability of nectar resources in the landscape. Species that decline in Sweden are strongly decreasing or already extinct in other parts of Europe. Many typical grassland species that were numerous in former times have declined severely; among those Hesperia comma, Lycaena virgaureae, Lycaena hippothoe, Argynnis adippe, and Polyommatus semiargus. Also, species associated with open woodlands and wetlands such as, Colias palaeno, Boloria euphrosyne and the glade-inhabiting Leptidea sinapis have all decreased markedly. Current management practise and EU Common Agricultural Policy rules favour intensive grazing on the remaining semi-natural grasslands, with strong negative effects on butterfly diversity. Abandoned grasslands are very common in less productive areas of southern Sweden and these habitats may soon become forests. There is an urgent need for immediate action to preserve unfertilized, mown and lightly grazed grasslands. It is also crucial to encourage that management of abandoned grasslands resumes before it is too late. In order to mitigate risks of further species loss and to work towards recovery of threatened butterfly populations using best known practises, we recommend twelve types of management measures favourable for many butterflies.

This book brings together fourteen edited contributions presented in the context of a Scandinavian researcher course organised in Uppsala, Sweden, on May 2-7, 1994. It addresses current issues of development, democratisation and civil society in a number of countries in Asia (India, Indonesia, Bangladesh, the Philippines), Africa (Nigeria, Zambia) and Latin America (Chile) against the background of theoretical introductions and comparisons with the Swedish historical experience of democratisation. The study indicates that there is no other possible way to promote the conjunction between constitutionalism and popular sovereignty necessary for sustainable democratisation than democratic self-organisation around common issues of survival and development. (DÜI-Hff)

All over Europe post-Second World War large-scale housing estates face physical, economic, social and cultural problems. This book presents the key findings of a major EU-funded research programme into the restructuring of twenty-nine large-scale housing estates in Northern, Western, Southern and Eastern Europe. Policy and practice between and within the ten countries studied - UK, the Netherlands, Sweden, Germany, Poland, Hungary, Slovenia, Italy, Spain, and France - is compared. While existing literature focuses on the negative aspects of large-scale housing estates, this book starts from the premise that the estates can be transformed into attractive places to live and focuses on the possibilities of sustainability and renewal through social, physical and policy actions. Specifically, the book explains the origins and nature of contemporary problems on the estates; examines which policy objectives, measures and processes have had the greatest impact; assesses and compares a wide range of local, regional and national initiatives; discusses current ideas and philosophies, such as 'place making' and 'collaborative planning' that are likely to influence future policy and practice and provides good practice guidance for neighbourhood sustainability and renewal. Written by a multi-national team of experts and drawing on original fieldwork, the book provides unique comparative insights into the present and future position of large-scale housing estates in Europe. Restructuring large-scale housing estates in Europe is an invaluable resource for a wide audience of academics, researchers, students and policy makers in the fields of housing, urban studies, community studies, regeneration, planning and social policy