Suchergebnisse

The policy term green infrastructure highlights the need to maintain functional ecosystems as a foundation for sustainable societies. Because forests are the main natural ecosystems in Europe, it is crucial to understand the extent to which forest landscape management delivers functional green infrastructures. We used the steep west-east gradient in forest landscape history, land ownership, and political culture within northern Europe's Baltic Sea Region to assess regional profiles of benefits delivered by forest landscapes. The aim was to support policy-makers and planners with evidence-based knowledge about the current conditions for effective wood production and biodiversity conservation. We developed and modeled four regional-level indicators for sustained yield wood production and four for biodiversity conservation using public spatial data. The western case study regions in Sweden and Latvia had high forest management intensity with balanced forest losses and gains which was spatially correlated, thus indicating an even stand age class distribution at the local scale and therefore long-term sustained yields. In contrast, the eastern case study regions in Belarus and Russia showed spatial segregation of areas with forest losses and gains. Regarding biodiversity conservation indicators, the west-east gradient was reversed. In the Russian, Belarusian, and Latvian case study regions, tree species composition was more natural than in Sweden, and the size of contiguous areas without forest loss was larger. In all four case study regions, 54-85% of the total land base consisted of forest cover, which is above critical fragmentation thresholds for forest landscape fragmentation. The results show that green infrastructures for wood production and biodiversity conservation are inversely related among the four case study regions, and thus rival. While restoration for biodiversity conservation is needed in the west, intensified use of wood and biomass is possible in the east. However, a cautious approach should be applied because intensification of wood production threatens biodiversity. We discuss the barriers and bridges for spatial planning in countries with different types of land ownership and political cultures and stress the need for a landscape approach based on evidence-based collaborative learning processes that include both different academic disciplines and stakeholders that represent different sectors and levels of governance.

The beetle Osmoderma eremita has received much attention in the last few years, as it is among those species with the highest priority in the European Union's Habitat Directive. In this paper the species is evaluated as a potential indicator and umbrella species for the endangered beetle fauna in tree hollows. To be useful as an indicator of a species rich fauna it should be easy to inventory and be strongly correlated with the presence of other species. An umbrella species is a species which is so demanding that the protection of this species will automatically save many others. The species richness of saproxylic beetles and occupancy of O. eremita were surveyed in tree hollows in an area in southeastern Sweden by assessing presence/absence of living and dead adults (including fragments) and larvae. The species richness was higher when O. eremita was present, both at tree and stand level. Several threatened species were associated with the presence of O. eremita, whereas others did not correlate with occurrence of O. eremita. As O. eremita is easy to find and identify, it is useful as an indicator of stands with a rich beetle fauna in tree hollows. O. eremita is possible to use as an umbrella species, because if measures are taken to conserve O. eremita, many other species in the same habitat are also conserved. However, there are some beetles in tree hollows which seem to be more sensitive to habitat fragmentation than O. eremita, and may go extinct if only O. eremita is taken into consideration.

Biodiversity conservation is an important contemporary issue on global, EU and national policy agendas. However, in the face of human economic development, the important question is how to protect, maintain and restore biodiversity, without compromising economic and social dimensions of sustainability. Two sectors that can to a large extent influence biodiversity are forestry and road infrastructure development. Forestry is a sector very important for biodiversity conservation, since a large amount of protected and threatened species resides in forest ecosystems and many natural processes crucial for biodiversity occur in the forest. In addition, forests and woodlands form a network of habitats for many area-demanding species. Due to intensive forest management and fragmentation of forest and woodlands many elements of biodiversity are threatened, including species, habitats and processes. Road infrastructure development is another process that can negatively influence biodiversity. A growing network of transport infrastructure without doubt affects the functionality of the forest habitat networks. Negative effects include traffic mortality due to road collisions and barrier effect for individuals caused by high traffic volume, noise, wide roads and fencing. Cumulative effects of the infrastructure development can also lead to a loss of different elements of biodiversity at the landscape scale. Poland, with a legacy of less intensive forest management and still without a well-developed road infrastructure, is fortunate in terms of biodiversity maintenance. Due to economic underdevelopment of some regions of the country, Poland is rich in natural values including specialized species, functional habitat networks and ecological processes. However, after entering the European Union, Poland has started a process of rapid economic development, mainly with the help of EU funding. Enhancing road infrastructure is presently a key issue of economic development in this country. Dramatic growth in the amount of new roads can have large scale consequences for the biodiversity of the country, and can even influence biodiversity at the European scale. Policies aiming at biodiversity maintenance underline the need for implementing sustainability ideas in the planning and management for biodiversity. Traditionally, economic, environmental and social pillars of sustainability are identified. To be able to balance these three dimensions in the efforts for biodiversity conservation, there is a need to incorporate social dimensions in the nature science research concerning biodiversity. Especially, consideration of local attitudes is necessary in planning for biodiversity conservation. The aim of this thesis is to examine actors' attitudes and underlying values in two situations of conflict related to biodiversity conservation in Poland. One case concerns forest management in a biodiversity hot-spot, Białowieża forest and the other is about a development of a controversial road project of Augustów bypass. The results show that differences in attitudes may have various sources. The knowledge possessed by actors, their values, as well as scale at which they perceived biodiversity issues were identified as the main reasons for different attitudes. It was observed that in general, the actors whose attitudes were more "ecologically oriented" had to a large extent a cognitive view, that is their attitudes were mainly based on cognition (ecological knowledge) while "socially" or "economically oriented" actors' attitudes were more connected to emotions. In addition to differing attitudes, lack of trust was recognized in both cases as a factor escalating the conflict. The results showed also that legal issues are crucial to consider when biodiversity conservation is at stake. The results may have implications for the practical biodiversity conservation, since they show that both learning and legal incentives would be beneficial for the biodiversity conservation in controversial planning cases. This calls for the need for neutral forum for efficient public participation, communication and trust building between the actors and learning about important issues