Overview of climate change and how this will effect Oregon gardeners.

1. Brooke Edmunds, PhD
Oregon State University Extension

3. Cause of climate change?
Increase in
Greenhouse Gases
Water vapor
Carbon dioxide
Methane
Nitrous oxide
CFC’s
Figure: http://climate.nasa.gov/causes/

5. http://www.climate-lab-book.ac.uk/files/2016/05/spiral_optimized.gif

6. Effect in the PNW?
• Predicted warming of 2.7ºF by 2030 & 5.4ºF by 2050
• Changes in precipitation?
• Increased extreme weather events?
(From: Scientific Consensus Statement on theLikely Impacts of Climate Change on the Pacific Northwest, 2004)

7. How could this affect our gardens?
• Plant phenology changes
• Exposed to new/different pest pressure
Good Read:
R. Bisgrove and P. Hadley. 2002. Gardening in the Global Greenhouse: The
impacts of climate change on gardens in the UK. Technical report online.

8. What is plant phenology?
Study of cyclic & seasonal natural phenomena
• Bud break timing
• Flowering
• Fruiting
• Leaf expansion
• Fall leaf color
• Dry matter
Photo: http://depts.washington.edu/uwbg/wordpress/wp-content/uploads/bigleafflower.jpg

10. www.usanpn.org

11. “Future projections suggest that warmer
temperatures, longer growing seasons, and increased
drought severity will stress Douglas-fir that are
adapted to current climate conditions.”
-Considering Assisted Migration for Trees in a Changing Climate on
http://blogs.oregonstate.edu/orforestscc

12. Effect of climate change on pest problems?
It’s Complicated!
Photo: Griffin Stewart via Flickr CC BY-NC-ND 2.0

13. 1st: Separate the effect of global trade & travel

14. 2nd: Effects on pest phenology?
Figure: https://upload.wikimedia.org/wikipedia/commons/f/f3/Plant_Disease_Triangle.png
Figure: http://www.420genetics.com/faq/pest/afig.2.JPG

17. Figure: http://www.420genetics.com/faq/pest/afig.2.JPG
Increased generations within
a growing season?

19. Stressed trees are more vulnerable
Many insect species are attracted to stressed trees
http://oregonforests.org/sites/default/files/blog_photos/Zombie_tree_feature.jpg

20. Precipitation can increase disease spread
Phytophthora ramorum spread facilitated by heavy
rain events (Rizzo & Garbelotto, 2003)
Photo: http://www.nature.com/nature/journal/v466/n7308/images/466824a-f1.2.jpg

21. Photo: http://www.howtobeadad.com/wp-content/uploads/2014/12/8-ball-header-575x250.jpg
What will the future hold for our gardens?

23. Education + action is key

24. Do your part &
educate others
From: http://www.un.org/climatechange/take-action/

25. http://toolkit.climate.gov/

26. Increase Diversity!
https://upload.wikimedia.org/wikipedia/commons/a/af/Avenue_of_trees_-_geograph.org.uk_-_185473.jpg

27. Visit: catalog.extension.oregonstate.edu

29. Take a class!

30. www.hungrypests.com

32. Get involved as a citizen scientist!

33. www.usanpn.org

34. Thank you!
brooke.edmunds@oregonstate.edu