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Relationships Between Tidal Height and Species Abundances: Monitoring Rocky Shore Ecosystems

Explore the implications of tidal height fluctuations on species abundance in rocky shore ecosystems. Investigate the influences of urbanization, sea temperature changes, and fishing pressures. Learn about zonation patterns and critical tidal levels affecting intertidal communities.

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Relationships Between Tidal Height and Species Abundances: Monitoring Rocky Shore Ecosystems

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

  2. Urban Influences

  3. Coastal Sea Temperature Warm Regime 3 2 1 Mean Monthly Anomalies (°C) 0 -1 -2 -3 -4 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995

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

  5. Tides: Daily RegimeMixed Semi-diurnal Character

  6. NEAP SPRING NEAP SPRING Tides: Monthly PatternsNeap and Spring Tides

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

  8. Zonation and Critical Tidal Levels (Max Doty) 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.

  9. Zonation

  10. Quadrat Sampling

  11. Line Point Contact Sampling

  12. Zonation Patterns Quantified Tidal Height Species 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.

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

  14. Calibrate Vertical Height on Shore with Tidal Datum

  15. 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

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