1. Relationships Between Tidal Height and Species Abundances: Implications for Monitoring Rocky Shores Steve Murray CSU Fullerton

3. Urban Influences

4. -4 -3 -2 0 1 2 3 Mean Monthly Anomalies (°C) 1950195519651960197019801990197519851995 Warm Regime Coastal Sea Temperature

5. Urban Influences? Fishing Pressures? Changing Sea Temperatures? Changing Sea Level? Changes in Intertidal Communities

6. Tides: Daily Regime Mixed Semi-diurnal Character

7. Tides: Monthly Patterns Neap and Spring Tides SPRINGNEAP SPRING

8. Tide Levels Feet Zero Datum = 0.0 ft Highest of High Tides = HHHW OR EHWS Lowest of Low Tides = LLLW OR ELWS MTL or MSL (Mean Tide Level or Mean Sea Level

9. Source: Doty, M. S. 1946. Critical tide factors that are correlated with the vertical distribution of marine algae and other organisms along the Pacific Coast. Ecology 27: 315-328. Zonation and Critical Tidal Levels (Max Doty)

10. Zonation

11. Quadrat Sampling

12. Line Point Contact Sampling

13. Source: Littler, M. M. and S. N. Murray. 1975. Impact of sewage on the distribution, abundance, and community structure of rocky intertidal macro-organisms. Mar. Biol. 30: 277-291. Zonation Patterns Quantified Tidal Height Species

14. Measuring Tidal Heights of Samples Measuring Rod Laser Target Laser Level

15. Calibrate Vertical Height on Shore with Tidal Datum

17. Acknowledgements Field and Lab Assistance: Janine Kido, Teri Denis, Jayson Smith, Everett Yee, Susan Frisch, Sarah Henkel, Erin Cox, Lisa Gilbane, Aimee Bullard, Amanda Gerrard, Julie Bursek, Jill Moeller, Tiffany Luas, Nicolle, Panos, Alison Kendall, Megan Williams, Erin Maloney, Kristen Kusic, Haven Livingston