1. Plant Competition

2. Today we will… Understand differences between intraspecific and interspecific competition Measure plant competition in Sanford Woodlot Apply our knowledge of correlations to understanding competition dynamics

3. Competition Intraspecific (within species) Interspecific (between species)

4. Competition Intraspecific (within species) Interspecific (between species)

5. Competition DirectIndirect Effects of one species impact another species indirectly Apparent Competition Exploitative Competition Animals: physical combat Plants: release of toxins

6. Apparent Competition (Indirect) Abundance of one species increases likelihood of consumption of other species

7. Exploitative Competition (Indirect) Individuals use same limiting resource (most common type of competition)

8. Why is it important to understand competition dynamics and outcomes?

9. What are the trade-offs between conducting controlled, manipulative experiments and observational studies?

10. Today’s Activity: Measuring Competition Read over page 65

11. Today’s Activity: Measuring Competition We will measure: – Intraspecific competition in beech trees – Interspecific competition between beech trees and other trees (collectively)

12. Today’s Activity: Measuring Competition Methods: What will you do? – Along transect, find focal beech tree, measure DBH – From that tree measure DBH of nearest beech and nearest “other” tree – Continue at every 6 meters (6 focal trees total)

13. Today’s Activity: Measuring Competition Each team needs – One 30-meter tape – Coursepack – Writing utensils

14. Data Analysis & Results Calculate mean, standard deviation, and correlation coefficient using Excel sheet (ANGEL) Graph results Answer questions on page 66 Class discussion of results Quiz