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Flora and Fauna Changes During Conversion from Conventional to Organic Farming
Table of Contents
Preface and acknowledgements
Sammenfatning og konklusioner
Summary and conclusions
1 Introduction (Esbjerg, P. & Petersen, B.)
1.1 Background
1.2 Aim and conditions
1.3 The study area
1.4 Weather
1.5 Data sampling
1.6 Statistical analyses
2 Wild flora (Jensen, A.-M.M. & Johnsen, I.)
2.1 Vegetation studies
2.1.1 Non-destructive method used to study the density, the phenology, the species richness and the composition of the wild flora
2.1.2 Destructive method used to study the biomass and the correlation between weed density and biomass
2.1.3 Method used to study the bird available seed mass
2.2 Results
2.2.1 Results of the non-destructive method used to study density, phenology, species richness and composition of weed plants
2.2.2 Results of the destructive method used to study the biomass
2.2.3 Results of the bird available seed mass
2.3 Discussion
2.3.1 Density
2.3.2 Flowering
2.3.3 Species richness
2.3.4 Weed composition
2.3.5 Biomass
2.3.6 Bird available seeds
3 Arthropods (Navntoft, S. & Esbjerg, P.)
3.1 Methods
3.1.1 Data sampling
3.1.2 Statistical analyses
3.2 Results
3.2.1 Dry mass analyses
3.2.2 Density analyses
3.2.3 Aphididae
3.2.4 Arthropods in relation to vegetation
3.3 Discussion
4 Birds (Petersen, B.S.)
4.1 Methods
4.1.1 Bird counts
4.1.2 Statistical analyses
4.2 Results
4.2.1 Analysis of Skylark numbers
4.2.2 Skylark numbers in relation to vegetation and arthropod abundance
4.3 Discussion
5 Food choice of Skylarks (Petersen, B.S. & Navntoft, S.)
5.1 Methods
5.1.1 Collection of faeces
5.1.2 Analysis of faeces
5.1.3 Data analysis
5.2 Results
5.3 Discussion
5.3.1 Sources of bias
5.3.2 Skylark food preferences
5.3.3 Effects of conversion to organic farming
6 General discussion and conclusions (Esbjerg, P., Petersen, B.S., Navntoft, S., Jensen, A.-M.M. & Johnsen, I.)
6.1 Summary of results
6.2 Discussion
6.3 Conclusions
6.4 Perspectives
7 References
Appendix A Herbicide and insecticide applications 1997-1999
Appendix B Basic field treatments
Appendix C Names of organisms studied
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