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Plant Diversity Effects on Predation Rates
- 1. Introduction Methods Results Discussion Increase in Predation Rates along an Experimental Plant Diversity Gradient Lionel Hertzog Anne Ebeling Sebastian Meyer Wolfgang Weisser
- 2. Introduction Methods Results Discussion Impacts of Predation on communities and ecosystems keepwolveslisted.blogspot.de
- 3. Introduction Methods Results Discussion Impacts of Predation on communities and ecosystems keepwolveslisted.blogspot.de Pearson Education
- 4. Introduction Methods Results Discussion Theoretical relationships between plant diversity and predation Exploitative ecosystem hypothesis Oksanen 1981 Marquard et al 2009 zoologi.su.se
- 5. Introduction Methods Results Discussion Theoretical relationships between plant diversity and predation Structural hypothesis Gotceitas 1989
- 6. Introduction Methods Results Discussion Questions 1 What is the effect of plant diversity and plant biomass on predation rates?
- 7. Introduction Methods Results Discussion Questions 1 What is the effect of plant diversity and plant biomass on predation rates? 2 What is the effect of season and position on predation rates?
- 8. Introduction Methods Results Discussion Field Site
- 9. Introduction Methods Results Discussion Sown Plant Species
- 10. Introduction Methods Results Discussion Baits Aphids Larvae Dummy
- 11. Introduction Methods Results Discussion Design: Baits Days of the experiment Σ 1 2 3 4 5 6 7 Aphids - - - 2 2 3 3 10 Larvae 3 4 3 2 3 2 3 20 4 3 3 3 2 3 2 20 Dummy 2 2 1 2 1 1 1 10 1 1 3 1 2 1 1 10 Σ 10 10 10 10 10 10 10 70
- 12. Introduction Methods Results Discussion Design: Spatial Replication N = 80
- 13. Introduction Methods Results Discussion Some numbers Proportion of removed baits (aphids + larvae) and of dummy with bite marks: May August Aphids 0.72 0.48 Larvae 0.54 0.17 0.86 0.55 Dummy 0.07 0.11 0.23 0.34
- 14. Introduction Methods Results Discussion Some numbers May August Gasteropods 3.8 2.5 17.6 13.4 Insects (bites) 4.3 6.3 8.1 20.9 Mammals 0.3 1.4 0.4 5.7 Birds 0.6 0.0 0.3 0.1
- 15. Introduction Methods Results Discussion Effect of Biomass Ground Vegetation
- 16. Introduction Methods Results Discussion May on the ground
- 17. Introduction Methods Results Discussion August on the ground
- 18. Introduction Methods Results Discussion May in the vegetation
- 19. Introduction Methods Results Discussion August in the vegetation
- 20. Introduction Methods Results Discussion Effect of vertebrate predation in May
- 21. Introduction Methods Results Discussion Plant diversity effect on predation Effect of plant diversity interacting with season and layer Phenology of prey and predator communities Different groups of predator between ground and vegetation Without vertebrate predation positive plant diversity effect on the ground
- 22. Introduction Methods Results Discussion Plant biomass effect on predation Weak biomass effect Only negative effects in May for larvae Might be correlated with vegetation complexity
- 23. Introduction Methods Results Discussion Summary 1 Variation in predation between ground and vegetation layer
- 24. Introduction Methods Results Discussion Summary 1 Variation in predation between ground and vegetation layer 2 Without vertebrate predation consistent increase of predation with plant diversity on the ground
- 25. Introduction Methods Results Discussion Summary 1 Variation in predation between ground and vegetation layer 2 Without vertebrate predation consistent increase of predation with plant diversity on the ground 3 Predator phenology render relationships complex
- 26. Introduction Methods Results Discussion Summary 1 Variation in predation between ground and vegetation layer 2 Without vertebrate predation consistent increase of predation with plant diversity on the ground 3 Predator phenology render relationships complex 4 No support for the exploitative hypothesis
- 27. Introduction Methods Results Discussion Summary 1 Variation in predation between ground and vegetation layer 2 Without vertebrate predation consistent increase of predation with plant diversity on the ground 3 Predator phenology render relationships complex 4 No support for the exploitative hypothesis 5 Potential support for the structural complexity hypothesis
- 28. Introduction Methods Results Discussion Future direction
- 29. Introduction Methods Results Discussion The thank you slide Ilka Wolf Sylvia Creutzburg Gerlinde Kratzsch Silke Schroekh Diana von Unruh Heike Scheffler Silke Hengelhaupt Ute K¨ober Many student helpers DFG for funding
- 30. Introduction Methods Results Discussion
- 31. Introduction Methods Results Discussion