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Estuarine and Coastal Marsh Communities

Estuarine and Coastal Marsh Communities. Objectives: Describe estuary, coastal marsh, and their relationship to the ocean community. Introduce life cycles of the oopu and salmon, and discuss the physiological adaptations of each. Describe abiotic factors that shape these environments.

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Estuarine and Coastal Marsh Communities

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  1. Estuarine and Coastal Marsh Communities Objectives: Describe estuary, coastal marsh, and their relationship to the ocean community. Introduce life cycles of the oopu and salmon, and discuss the physiological adaptations of each. Describe abiotic factors that shape these environments. Discuss reasons to protect these environments.

  2. Estuaries • semi-enclosed areas where fresh water and seawater meet and mix • soft mud bottom • Includes: bays and sounds, salt water marshes, mangrove forests

  3. Coastal Marshes (wetlands) areas that are partially flooded during high tide dominated by grasses and salt-tolerant land plants Natural filter

  4. AbioticFactors 1. pollution 2. salinity • fluctuates widely • varies with depth 3. tidal currents 4. water temperatures 5. water clarity due to sediment

  5. Importance Most productive ecosystems in the world provide habitat for many species of birds nurseries for fishes and marine invertebrates

  6. Diadromous fish • use both fresh and salt water habitats during their life cycle • Examples: • Salmon • O’opu (Hawaii)

  7. O’opu Native fishes (gobies) eggs hatch in streams and hatchlings get washed into the ocean after 4 to 6 months, head back upstream to spawn (lay eggs)

  8. climb waterfalls suction-cup pectoral fins dip head into water to catch their breath http://hawaii.gov/dlnr/dar/pubs/Nopili.pdf

  9. Salmon

  10. Now… Time to work on your coral zonation lab …. Ask questions now. Due tomorrow!

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