Per Arvid Åsen

Per Arvid Åsen
Universitetet i Agder | UIA · Natural history museum and botanical garden

MS

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14
Publications
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Introduction
Per Arvid Åsen currently works at the Department of Botany, Natural history Museum and Botanical Garden, University of Agder, Kristiansand, Norway. Per does research in monastic gardens in the Nordic coutries
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Publications

Publications (14)
Article
Full-text available
Gardening was an important part of the daily duties within several of the religious orders in Europe during the Middle Ages. The rule of Saint Benedict specified that the monastery should, if possible, contain a garden within itself, and before and above all things, special care should be taken of the sick, so that they may be served in very deed,...
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Full-text available
Gardening was an important part of the daily duties within several of the religious orders in Europe during the Middle Ages. The rule of Saint Benedict specified that the monastery should, if possible, contain a garden within itself, and before and above all things, special care should be taken of the sick, so that they may be served in very deed,...
Article
Full-text available
1 . Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in local biodiversity and ecosystem functioning, and, ultimately, to biotic homogenisation. 2 . We risk‐assessed all alien plants, a...
Article
Full-text available
We present the results of an inventory and status assessment of alien species in Norway. The inventory covered all known multicellular neobiota, 2496 in total, 1039 of which were classified as naturalised. The latter constitute c. 3% of all species known to be stably reproducing in Norway. These figures are higher than expected from Norway’s latitu...
Article
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In the multidisciplinary project presented here, 12 known monastic grounds in Iceland were surveyed by a group of medievalists from different fields in the summers of 2009, 2010 and 2011. The aim of the survey was to increase knowledge of the Icelandic monastic garden and of the plants that were known and used there; to look for possible medieval c...
Conference Paper
Full-text available
In the middle ages Monastic gardens were common in Europe, and we assume that this tradition was also present in Norway, but most likely on a much smaller scale. There were 31 medieval monasteries in Norway. All were dissolved and shut down during the Reformation around 1537. In order to find out if any medieval relict plants still were present at...
Conference Paper
Full-text available
Recently in Norway there has been a growing awareness for historical gardens plants, and the inclusion of these plants in gene banks. This includes plants known in culture at least before 1940. From 1998 to present Agder Botanical Garden, Kristiansand, South Norway, has documented several hundred different historical perennials, bulbs, ornamental s...
Article
Full-text available
Incubation of [1-14C]linoleic acid with an enzyme preparation obtained from the red algaLithothamnion corallioides Crouan resulted in the formation of 11-hydroxy-9(Z),12(Z)-octadecadienoic acid as well as smaller amounts of 9-hydroxy-10(E),12(Z)-octadecadienoic acid, 13-hydroxy-9(Z),11(E)-octadecadienoic acid and 11-keto-9(Z),12(Z)-octadecadienoic...
Article
Full-text available
Many benthic marine algae of the Norwegian flora, especially red algae, reach their geographical limits betweem More and Nordland (63°-68°N). The Skagerrak coast is another stretch where many species fail to penetrate. Species with distribution limits within these areas are discussed in view of gradients in seawater temperatures and other ecologica...
Article
Full-text available
The upright gametophyte of Bonnemaisonia asparagoides is a summer annual. It alternates with a perennating crustose stage that resembles Hymenoclonium serpens. Cultures started from carpospores produced Hymenoclonium and subsequently monoecious Bonnemaisonia gametophytes were formed directly on Hymenoclonium, with no indications of tetrasporangium...
Article
Full-text available
Chondria dasyphylla, Hymenoclonium serpens (Rhodophyta) and Bryopsis lyngbyei (Chlorophyta) are reported for the first time in Norway from several localities in Vest-Agder county on the south coast. C. dasyphylla is reported from two localities situated in sheltered fjords. H. serpens is growing mostly epizoic on ascidians; in July-September often...

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Project (1)
Project
The main aim is to document which plants were cultivated by the people at lighthouse stations, which plants were useful and also hardy enough to survive, how they were cultivated, and in particular to document the plants still remaining alive as living evidence of the former gardens.