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Vegetation composition of extensive green roofs in Oslo, Norway / Defense of Master thesis
- 1. Vegetation composition of extensive green roofs in Oslo, Norway Master thesis in Environmental Science by Marina Bakhtina Supervisor Associate Professor Stefanie Reinhardt 1 University College of Southeast Norway 29-08-2016
- 2. University College of Southeast Norway Marina Bakhtina 29-08-2016 ▹ Introduction ▹ Material and Methods ▹ Results and Discussion ▹ Conclusion Outline 2 Outline
- 3. University College of Southeast Norway Marina Bakhtina 29-08-2016 What is a green roof ? Photo on the roof of Barcode project, Oslo 3 Introduction
- 4. University College of Southeast Norway Marina Bakhtina 29-08-2016 Extensive Semi-intensive Intensive 4 Classification Introduction Illustration: www.zinco-greenroof.co.uk Illustration: www.bergen.kommune.no
- 5. University College of Southeast Norway Marina Bakhtina 29-08-2016 One type of structure 5 Introduction Illustration: http://designmeans.com/work/illustration/green_roof.html
- 6. University College of Southeast Norway Marina Bakhtina 29-08-2016 Vegetation Sedum-moss type Species composition: ▹ Sedum ▹ Phedimus ▹ Hylotephium 6 Introduction
- 7. University College of Southeast Norway Marina Bakhtina 29-08-2016 “Objectives of the study 7 Introduction ▹ Has the vegetation composition on the studied EGRs changed after it has been established? ▹ How has the composition changed? ▹ What is the relation between vegetation composition and environmental variables?
- 8. University College of Southeast Norway Marina Bakhtina 29-08-2016 Data collection from companies and roof owers ▹ Area ▹ Year of installation ▹ Type of Sedum mat ▹ Type of green roof system and soil depth ▹ Flat roof and roof with slope ▹ Annual maintenance 8 Materials and Methods
- 9. University College of Southeast Norway Marina Bakhtina 29-08-2016 18 roofs, 92 plots 9 Materials and Methods Google map
- 10. University College of Southeast Norway Marina Bakhtina 29-08-2016 Data collection from fieldwork ▹ Floristic sampling ▹ Soil sampling, every second plot ▹ Depth of soil - 3 measurements ▹ Sun and shade exposure 10
- 11. University College of Southeast Norway Marina Bakhtina 29-08-2016 Species groups 11 Materials and Methods ▹ Originally Planted species ▹ Spontaneously Established species
- 12. University College of Southeast Norway Marina Bakhtina 29-08-2016 46 samples to measure: ▹ pH ▹ Nutrients (P, K, Mg and Ca) ▹ Organic matter ▹ Specific weight Soil analysis 12 Materials and Methods
- 13. University College of Southeast Norway Marina Bakhtina 29-08-2016 ▹ Ordinations ▹ Regressions ▹ Comparison of mean values and median values Statistical analysis 13 Materials and Methods
- 15. University College of Southeast Norway Marina Bakhtina 29-08-2016 15 Results and Discussion Species group Richness of originally planted species Richness found planted species and SES (observed during fieldwork) Succulents 15 10 Herbs 0 43 Graminoids 0 10 Woody plants 0 5 Bryophytes 0 25 Lichens 0 3 Sum 15 96 Species richness
- 16. University College of Southeast Norway Marina Bakhtina 29-08-2016 Abundance of Originally Planted Species in prefabricated Sedum mats 16 Results and Discussion 49% 51% Less than 80%80% or more 80% or more How it has changed
- 17. University College of Southeast Norway Marina Bakhtina 29-08-2016 Black list 17 Results and Discussion ▹ Phedimus hybridus SE ▹ Phedimus spurius SE ▹ Epilobium ciliatum SE ▹ Senecio viscosus HI Red list ▹ Veronica verna NT
- 18. University College of Southeast Norway Marina Bakhtina 29-08-2016 Vegetation 18
- 19. University College of Southeast Norway Marina Bakhtina 29-08-2016 Variables 19 Vegetation ▹ Abundance in % of species and species groups ▹ Richness in species groups ▹ Richness of originally planted vegetation and growing species Environment ▹ Mean soil depth ▹ Nutrients (P, K, Mg, Ca) ▹ pH ▹ Dry matter ▹ Loss on ignition ▹ Elevation ▹ Sun/shade ▹ Flat/Slope ▹ Area ▹ Type of green roof system ▹ Company ▹ Age Results and Discussion Originally planted vegetation ▹ Type of sedum mix
- 20. University College of Southeast Norway Marina Bakhtina 29-08-2016 20 PCA Results and Discussion PCA
- 21. University College of Southeast Norway Marina Bakhtina 29-08-2016 DCA 21 Results and Discussion
- 22. University College of Southeast Norway Marina Bakhtina 29-08-2016 22 Photo from ZinCo website Usual plot Results and Discussion Outlier
- 23. University College of Southeast Norway Marina Bakhtina 29-08-2016 Soil depth Results and Discussion 23
- 24. University College of Southeast Norway Marina Bakhtina 29-08-2016 pH 24 Results and Discussion
- 25. University College of Southeast Norway Marina Bakhtina 29-08-2016 Age 25 Results and Discussion
- 26. University College of Southeast Norway Marina Bakhtina 29-08-2016 Age 26 Results and Discussion
- 27. University College of Southeast Norway Marina Bakhtina 29-08-2016 “Summary 27 Conclusion ▹ Has the vegetation composition on the studied EGRs changed after it has been established? Yes ▹ How has the composition changed? SES have established on roofs 51% of studied plots experience decrease in originally planted species abundance Richness of originally planted species decrease, but richness in total increase ▹ What is the relation between vegetation composition and environmental variables? The most statistically significant for species distribution are type of sedum mix, soil depth, ph, loss on ignition, K and P levels and age
- 28. University College of Southeast Norway Marina Bakhtina 29-08-2016 28 Thank you!
- 29. University College of Southeast Norway Marina Bakhtina 29-08-2016 29 Contact information https://marinabakhtina.wordpress.com