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

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Presentation transcript:

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

Urban Influences

Mean Monthly Anomalies (°C) Warm Regime Coastal Sea Temperature

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

Tides: Daily Regime Mixed Semi-diurnal Character

Tides: Monthly Patterns Neap and Spring Tides SPRINGNEAP SPRING

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

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

Zonation

Quadrat Sampling

Line Point Contact Sampling

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

Measuring Tidal Heights of Samples Measuring Rod Laser Target Laser Level

Calibrate Vertical Height on Shore with Tidal Datum

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