Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2014
Authors
Inger HansenAbstract
No abstract has been registered
Authors
Inger HansenAbstract
No abstract has been registered
Authors
Inger HansenAbstract
No abstract has been registered
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Authors
Jutta Kapfer Einar Heegaard Svein Olav Krøgli Christian Pedersen Gregory Taff Wenche DramstadAbstract
Background & Aim: Land-use regimes and their changes, as well as landscape heterogeneity are key determinants of the distribution and composition of species in cultural landscapes. In European agricultural landscapes, habitat loss due to both abandonment and intensification of agriculture fields are major causes for the decline of species diversity. Landscapes that are diverse in habitats and species are important to maintain basic ecosystem functions and services as, for instance, pollination or habitat preservation. In Norway, semi-natural species-rich habitats, such as agricultural grasslands, often occur in mosaics with forests and crop fields. This research studies key information for design of conservation plans focused on these habitats, addressing how landscape structure and land-use history affect the distribution, richness and composition of species in species-rich grasslands across geographical regions. Material & Methods: We recorded vegetation (species occurrence and cover) in agricultural grasslands with varying intensity and type of use from 569 plots of 8 x 8 m size systematically distributed throughout Norway (from 64 to 78 °N latitude). To identify the most important driving factors of species diversity and composition we explored the combined effects of historic and current land-use and the spatial landscape configuration of nearby land cover types (e.g. minimum distance to or area of neighbouring wetland, forest, cultivated land) taking into account the effects of grazing, elevation, and moisture conditions. Non-metrical multidimensional scaling (NMDS) was applied to identify the most important drivers of species composition. We used Generalized Additive Mixed Models to test the relationship of these drivers with patterns in species richness. Main results & Interpretations: NMDS revealed species composition to be explained most by the distance to surface cultivated land and transportation corridors (r=0.905, p<0.001 and r=-0.982, p<0.001; 1. NMDS axis) as well as shape of the patch in which the vegetation plot is embedded (patch shape) and grazing intensity (r=0.988, p<0.001 and r=-0.952, p<0.001; 2. NMDS axis). Observed patterns in species richness were statistically significantly linked to the combined effects of elevation, grazing intensity, historical land-use, patch shape, distance to transportation corridors and forest, and area of nearest wetland. Our results demonstrate the importance of a variety of factors influencing the species composition and richness in Norwegian grasslands. We found that both the landscape element harbouring the observed plot and also the surrounding landscape structure and intensity of land-use are important determinants of species diversity. The fact that distance to more intensively managed agricultural land is one of the strongest explanatory facts signals how effects of agricultural management practices reaches outside the field itself and into adjacent landscape elements. This suggests that the entire landscape needs to be taken into consideration when management of a particular habitat patch is planned.
Authors
Knut Egil Bøe Aksel Bernhoft Inger Hansen Kristian Hoel Randi Oppermann Moe Siri Christine Seehus Birger Svihus Anne C Whist Olav Østerås Åshild Kristine Andreassen Augustine Arukwe Bjarne Olai Braastad Ulf Gøran Erikson Margaretha Haugen Gro Ingunn Hemre Brit Kristine Hjeltnes Åshild Krogdahl Torsten Källqvist Jørgen Fredrik Lassen Stein Håkon Mortensen Bjørn Næss Rolf-Erik Olsen Espen Rimstad Janneche Utne Skåre Inger-Lise Steffensen Leif Sundheim Ole Torrissen Jan AlexanderAbstract
No abstract has been registered
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No abstract has been registered
Abstract
No abstract has been registered