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| Andersen, Liselotte Wesley; Marchi, Chiara; Strandberg, Beate; Bruus Pedersen, Marianne; Damgaard, Christian; Jensen, Thomas Secher; Olsen, Kent; Dalgaard, Tommy; Topping, C.J.. |
| • Økologiske marker har mere ukrudtsbiomasse end konventionelle. • Der er flere blomstrende arter i økologiske hegn end konventionelle forudsat, at der er kontinuitet i den økologiske drift. • Der er flere små pattedyr i små økologiske biotoper end konventionelle. • Fjernmålinger fra fly eller satellit, kaldet remote sensing, kan skelne hvilken afgrødetype der dyrkes, samt forekomsten af småbiotoper. • Uanset driftformen er det vigtigt at inddrage naturhensyn i driften, dvs., at der findes ekstensivt drevne arealer (græsmarker, overdrev, enge) til natur og direkte afsatte arealer til natur. |
| Tipo: Other |
Palavras-chave: "Organics" in general; Biodiversity and ecosystem services. |
| Ano: 2010 |
URL: http://orgprints.org/23299/7/23299.pdf |
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| Jensen, Thomas Secher; Hansen, Tine Sussi; Olsen, Kent. |
| Habitat fragmentation, the process by which relatively continuous habitats is broken into smaller pieces, occurs in natural systems but is to a high degree also human-induced through landscape use. Fragmentation of the landscape produces a series of habitat patches surrounded by a matrix of different habitats and land use regimes. The major landscape consequences of fragmentation are loss of habitat, reduction in habitat patch size, and increasing isolation of habitat patches. In general, population performance declines in response to habitat loss but size of remaining area and isolation effects is known also to influence the population trend. Small mammals are well suited for examination of population responses to habitat fragmentation as they have... |
| Tipo: Working paper |
Palavras-chave: Farming Systems; Environmental aspects; Knowledge management. |
| Ano: 2011 |
URL: http://orgprints.org/19072/7/19072.pdf |
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| Jensen, Thomas Secher; Olsen, Kent; Hansen, Tine Sussi; Vedel-Smith, Christina. |
| During 2008-2011 field voles (Microtus agrestis) were studied in a Danish agro-ecosystem in connection with a programme elucidating the role of organic farming as refuge for biodiversity, due to the observed biodiversity losses in conventional farmland. The aim of the study was to quantify home ranges and movements of voles in order to test a hypothesis that vole populations living in organic farm could colonize unoccupied areas in conventional farms. Voles were radiocollared and tracked until death or disappearance. Results showed that vole home-ranges were larger during onset of the breeding season than during the height of the breeding season and the non-breeding period. Males had larger home ranges than females. Voles occupying isolated small... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Farming Systems; Environmental aspects. |
| Ano: 2012 |
URL: http://orgprints.org/19073/7/19073.pdf |
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| Andersen, Liselotte Wesley; Marchi, Chiara; Topping, C.J.; Strandberg, Beate; Bruus Pedersen, Marianne; Damgaard, Christian; Jensen, Thomas Secher; Olsen, Kent; Dalgaard, Tommy. |
| Changes in agriculture might drive changes in biodiversity and are expected to have just as serious an effect as climate change. These changes are results of complex changes in land-use as well as land management, intensification of management and structural developments in agriculture. In this review we present results of a recent research project (ICROFS 2013) focusing on organic farming and biodiversity in Denmark and relate the results to international studies that focus on drivers of biodiversity in the agricultural landscape. The project was organized under five major themes, forming the main sections of the present review paper: Impact on i) plant biodiversity ii) insect and food-webs in cereal fields, iii) small mammals, iv) natural genetic... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general. |
| Ano: 2013 |
URL: http://orgprints.org/23312/13/23312.pdf |
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| Andersen, Liselotte Wesley; Marchi, Chiara; Strandberg, Beate; Topping, C.J.; Jensen, Thomas Secher; Olsen, Kent; Bruus Pedersen, Marianne; Damgaard, Christian; Dalgaard, Tommy. |
| Organic farming is generally acknowledged for its positive effects on biodiversity and other landscape services. However, the intensity of farming has changed significantly through the last decade as ranks of traditional holistic organic farmers have been joined by much more economically-driven new organic farmers. At the same time there have also been steady improvements in farming methodology and crop types resulting in efficiency in organic farming which can often rival its conventional counterparts. Therefore, large variations occur between organic farms. |
| Tipo: Other |
Palavras-chave: "Organics" in general. |
| Ano: 2008 |
URL: http://orgprints.org/23298/7/23298.pdf |
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| Jensen, Thomas Secher; Hansen, Tine Sussi; Olsen, Kent. |
| Habitat fragmentation, the process by which relatively continuous habitats is broken into smaller pieces, occurs in natural systems but is to a high degree also human- induced through landscape use. Fragmentation of the landscape produces a series of habitat patches surrounded by a matrix of different habitats and/or land use regimes. The major landscape consequences of fragmentation are loss of habitat, reduction in habitat patch size, and increasing isolation of habitat patches. In general, population performance declines in response to habitat loss but size of remaining area and isolation effects is known also to influence the population trend. Small mammals are well suited for examination of population responses to habitat fragmentation as they have... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2009 |
URL: http://orgprints.org/16306/1/16306.pdf |
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| Jensen, Thomas Secher; Olsen, Kent. |
| North European landscapes are highly dominated by agriculture, where small biotopes, e.g. meadows, uncultivated grassland, hedge rows, field boundaries, surroundings of water ponds, only comprise a low percentage. In recent years organic farming has expanded in acreage due to customers increased awareness regarding pesticide and fertilizer use and biodiversity conservation. However, organic farming has changed from an extensive production with small fields, low mechanical impact and high crop diversity towards larger fields, intensive mechanical treatment, lower weed densities and lower field diversity. Still, organic farms could play an important, role in the agricultural landscape as refuges for some small mammal species. We studied the responses of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems; Environmental aspects. |
| Ano: 2010 |
URL: http://orgprints.org/19461/4/19461.pdf |
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