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| Marchi, Chiara; Andersen, Liselotte Wesley; Damgaard, Christian F.; Olsen, Kent; Jensen Secher, Thomas; Loeschcke, Volker. |
| The distribution of genetic differentiation and the directions of gene flow were determined mainly by landscape factors: thus the expectation that organic fields act as genetic reservoir was not met. The fact that agricultural area presented more sub-populations than the undisturbed one, together with the importance of connectivity and habitat size in shaping gene flow and genetic differentiation, shows that switching to organic farming might not be enough to ensure the conservation of species in the agricultural environment. These results emphasise the need to include landscape structure in management policies. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2010 |
URL: http://orgprints.org/19056/3/19056.pdf |
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| Marchi, Chiara; Andersen, Liselotte Wesley; Holm, Lars-Erik; Loeschcke, Volker. |
| This project aims at understanding the effect of different farming systems on the genetic diversity of common agricultural species. It is well known that organic farming generally improves the biodiversity and abundance of species in the agricultural landscape (Hole et al., 2005). A reduction in species number and abundance has been shown as a result of the intensification of farming suggesting a relationship between farming intensity and species abundance (e.g. Stoate et al., 2001). Anyway, none of the studies that investigated the effects of pesticides presence and farming intensity has investigated the effect on the genetic diversity and isolation of the populations. It has been shown that, despite the theoretical expectations, also very abundant... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2009 |
URL: http://orgprints.org/16304/1/16304.pdf |
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| Marchi, Chiara; Andersen, Liselotte Wesley; Damgaard, Christian F.; Olsen, Kent; Jensen Secher, Thomas; Loeschcke, Volker. |
| The impact of landscape structure and land management on the dispersal of populations of wild species inhabiting the agricultural landscape was investigated by determining the genetic diversity and gene flow of field vole (Microtus agrestis) in three different areas. The main hypotheses were: I) organic farms act as genetic sources and diversity reservoirs for species living in agricultural areas and II) gene flow and genetic structure in the agricultural landscape are influenced by the degree of landscape complexity and connectivity. A total of 443 individuals were sampled within two consecutive years from two agricultural areas and one relatively undisturbed grassland area. Fifteen polymorphic microsatellite loci and the central part of the cytochrome-b... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general. |
| Ano: 2010 |
URL: http://orgprints.org/19059/4/19059.pdf |
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