2012 09-10 - upper rhinepresentation
- 1. Ecological enhancement of agricultural land in the Upper Rhine Plain 11. September 2012 Richard Bleil - Jessica Gelhausen - Dr. Rainer Oppermann Arno Schanowski - Dr. Volker Späth Supported by
- 2. Background Germany: 16.8 Mio ha agricultural area → At least 1.75 Mio ha of crops that profit from insect pollination wikimedia Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 2
- 3. Ecological enhancement measures Flower strips and areas Effect on pollinators? Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 3
- 4. The project area The farm in Rheinmünster: Enhancement area Control area Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 4
- 5. The project area Crops in 2010 … in the planned enhancement area Corn Cereals Fallow Other Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 5
- 6. Sampling 2010 Determination of status quo sweep-netting and observation on transects grass ways and flower rich meadows / marginal structures May - August Wild bees Butterflies Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 6
- 7. Ecological enhancements in 2011 Tübinger Mischung 10 % Flower strips Visselhöveder Insektenparadies MEKA 1 Kultur-Natur-blüht-auf Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 7
- 8. Ecological enhancements in 2011 Bee banks and nesting aids Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 8
- 9. Sampling 2011 • Observation and sweep-netting on transects • Focus on flower strips, June – August • Observation of behaviour (foraging / egg deposition) • Search for nests in bee banks Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 9
- 10. Results Butterflies Rheinmünster Dettenheim Total number of species (2010) 16 16 Species in flower strips (2011) 12 14 Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 10
- 11. Results Wild bees Rheinmünster Dettenheim Species in flower strips 48 54 Total number of species 2010 55 58 Individuals in flower strips 4000 3992 Individuals 2010 234 244 Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 11
- 12. Results Butterflies • No substancial increase in species richness • Flower strips predominantly used for foraging • Almost exclusively ubiquitous species Inachis io Gonepteryx rhamni Pieris rapae Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 12
- 13. Results Wild bees • No substancial increase in species richness • Few rare species and specialists use the flower strips • Enormously increased individual numbers • Bee banks are used as nesting sites Bombus lapidarius Bombus terrestris Oxybelus trispinosus Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 13
- 14. Conclusions • Flower strips are intensively used and constitute effective means of supporting local pollinator populations • Floristic diversity and resource availability early in the year are crucial for the promotion of faunal diversity / specialists Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 14
- 15. Prospect • Diverse perennial mixtures have been chosen and sown considering needs of endangered species • Control areas will be examined in detail for comparation • This year‘s data are being evaluated Enhancement area Control area Ecological enhancement of agricultural land in the Upper Rhine Plain 11. Septemeber 2012 15
- 16. Thank you very much for your attention 11. September 2012 Richard Bleil - Jessica Gelhausen - Dr. Rainer Oppermann Arno Schanowski - Dr. Volker Späth Supported by