1. Effects of tide pool volume on pool diversity Lindsay Grant, Anna Mairs, Charlotte Martin, Natalie Rideout and Gillian Tetlow

2. The Rocky Intertidal – Tide Pools The coastal area that is exposed during low tide and submerged during high tide Contains a high biodiversity of species A receding tide leaves an accumulation of pools

3. Tide pools Allow organisms to escape high temperatures and desiccation Acts as breeding and nursing grounds, provides protection and a feeding habitat Can also be stressful environments Changing ocean salinity, temperature and pH

4. Goal of Study To determine if the tide pool size affects the species diversity Hypothesis - Species abundance will increase with increased size and depth of tide pools - However, species distribution will not be significantly different between varying tide pool dimensions

5. Methods Sampled 10 random tide pools of different sizes Measured dimensions Used a quadrat (1m x 1m) for larger pools Collected samples of all plants and animals present Plant coverage estimated Identified all species in the lab http://vitalsignsme.org/sites/default/files/climatechange12012/0 49.jpg

6. Methods – Calculations

8. Results Plant average – 4.3 12 species total Animal average – 4.9 18 species total

9. Results

11. No significant patterns found for plant or animal diversity More sparse species of animals found than plants

12. Discussion Plants : 3 outliers Constant diversity irrespective of tide pool size Failed to support hypothesis http://www.clarku.edu/departments/biology/biol201/2002/EMachala/Galler y.htm

14. Discussion Animals: Similar to plants, 2 outliers Richness vs Abundance Failed to support hypothesis https://www.clarku.edu/departments/biology/biol201/2002/JDubois/Marine%20 Gastropods.htm

16. Discussion Confounding variables: Ambient conditions Elevation Uneven distribution of pool volumes http://www.acurite.com/7-5-thermometer-00338.html

17. Discussion Supporting studies: Cullity (2012) Found no significant relationship Biological relevance: Metaxas and Scheibling (1993) Refuge area from stressful conditions

18. Questions?