Anette Edvardsen

• Halvorsen, Rune; Edvardsen, Anette & Bakkestuen, Vegar (2011). Romlig prediksjonsmodellering av griseblad (Scorzonera humilis) i Østfold. In Halvorsen, Rune (Eds.), Faglig grunnlag for naturtypeovervåking i Norge – grunnlagsundersøkelser. Universitetet i Oslo, Naturhistorisk museum. ISSN 978-82-7970 022 7. p. 118–126.
• Edvardsen, Anette; Bakkestuen, Vegar & Halvorsen, Rune (2011). A fine-grained spatial prediction model for the red-listed vascular plant Scorzonera humilis. Nordic Journal of Botany (NJB). ISSN 0107-055X. 29(4), p. 495–504. doi: 10.1111/j.1756-1051.2010.00984.x.
• Hamre, Liv Norunn; Halvorsen, Rune; Edvardsen, Anette & Rydgren, Knut (2010). Plant species richness, composition and habitat specificity in a Norwegian agricultural landscape. Agriculture, Ecosystems & Environment. ISSN 0167-8809. 138(3-4), p. 189–196. doi: 10.1016/j.agee.2010.04.018. Show summary

  In this study the variation in species richness, species composition and habitat specificity is examined among all land patches in a 43-ha landscape in W Norway, created by traditional agricultural management practices, with particular focus on the distribution of semi-natural grassland species, i.e. species known to be typical of species-rich semi-natural grasslands. In 2002 about one half of the study area was intensively managed for agricultural purposes, 19.3% was woodland and 14.4% was semi-natural grassland. The main vegetation gradient in the area reflected long-term management (land-use) intensity. Both species richness and habitat specificity decreased with increasing management intensity. Semi-natural grassland species occurred throughout the landscape, although with some concentration to semi-natural grasslands. The two measures of habitat specificity both peaked in semi-natural grasslands. Comparison of the present patterns of vascular plant distributions with information on past land-use derived from a map from 1865, indicate that species typical of semi-natural grasslands persist long after land use activities have come to an end and that there is an extinction debt in the vascular flora. The significant positive relationship between patches with high richness of species typical of semi-natural grasslands, remnant semi-natural grassland patches and man-made structures with long continuity, shows that restoring formerly open semi-natural grassland 'hot spots' in a agricultural landscapes is advantageous both for conservation of cultural and biological values. (C) 2010 Elsevier B.V. All rights reserved.

• Edvardsen, Anette; Halvorsen, Rune; Norderhaug, Ann; Pedersen, Oddvar & Rydgren, Knut (2010). Habitat specificity of patches in modern agricultural landscapes. Landscape Ecology. ISSN 0921-2973. 25(7), p. 1071–1083. doi: 10.1007/s10980-010-9481-2. Show summary

  Habitat specificity analysis provides a tool for partitioning landscape species diversity on landscape elements by separating patches with many rare specialist species from patches with the same number of species, all of which are common generalists and thus provide information of relevance to conservation goals at regional and national levels. Our analyses were based upon species data from 2201 patch elements in SE Norwegian modern agricultural landscapes. The context used for measuring habitat specificity strongly influences the results. In general the gamma diversity contribution and core habitat specificity calculated from the patch data set were correlated. High values for both measures were observed for woodland, pastures and road verges whereas midfield islets and boundary transitional types were ranked low, as opposed to findings in traditional, extensively managed agricultural landscapes. This is due to our study area representing intensively used agricultural landscape elements holding a more trivial species composition, in addition to ruderals being favoured by fertility and disturbance, a finding also being supported by the semi-natural affiliation index. Results obtained by use of checklist data from the same study area diverged from patch data. Caution is needed in interpretation of habitat specificity results obtained from checklist data, because modern agricultural landscapes contain several land types which are seldom surveyed by botanists, thus being under-represented in the data set. We propose the use of core habitat specificity and gamma diversity contribution in parallel to obtain a value neutral diversity assessment that addresses patch uniqueness and other properties of conservation interests.

• Halvorsen, Rune & Edvardsen, Anette (2009). The concept of habitat specificity revisited. Landscape Ecology. ISSN 0921-2973. 24(7), p. 851–861. doi: 10.1007/s10980-009-9363-7.
• Økland, Rune Halvorsen; Bratli, H; Dramstad, WE; Edvardsen, Anette; Engan, Gunnar & Fjellstad, Wendy [Show all 9 contributors for this article] (2006). Scale-dependent importance of environment, land use and landscape structure for species richness and composition of SE Norwegian modern agricultural landscapes. Landscape Ecology. ISSN 0921-2973. 21, p. 969–987.
• Edvardsen, Anette & Økland, Rune Halvorsen (2006). Variation in plant species richness in and adjacent to 64 ponds in SE Norwegian agricultural landscapes. Aquatic Botany. ISSN 0304-3770. 85, p. 79–91.
• Edvardsen, Anette & Økland, Rune Halvorsen (2006). Variation in plant species composition in and adjacent to 64 ponds in SE Norwegian agricultural landscapes. Aquatic Botany. ISSN 0304-3770. 85, p. 92–102.

View all works in Cristin