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Ecology Chesapeake Bay Ecosystem Issue: Submerged Aquatic Vegetation

Ecology Chesapeake Bay Ecosystem Issue: Submerged Aquatic Vegetation. Warm Up. Decimals to percent review (as needed) Take time to review how to turn a decimal into a percent. “The 5 rule” If the thousandths place is 5 or higher round up

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Ecology Chesapeake Bay Ecosystem Issue: Submerged Aquatic Vegetation

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  1. EcologyChesapeake Bay EcosystemIssue: Submerged Aquatic Vegetation

  2. Warm Up • Decimals to percent review (as needed) • Take time to review how to turn a decimal into a percent. • “The 5 rule” • If the thousandths place is 5 or higher round up • If the thousandths place is 5 or lower the number stays the same • Example: .145 = 14% • (because the 3rd number is a 5 in the thousand place) • What is the difference between abiotic and biotic? • What is a habitat? • What is your habitat? • What is an ecosystem? • Explain both abiotic and biotic factors of the marine ecosystem? • How would you write the following numbers as a percent? • .98888 • .743 • .125

  3. Essential Questions: • What factors contribute to the health of the submerged aquatic vegetation? • Why is submerged aquatic vegetation importantn to the health of the Chesapeake Bay? (How do interaction and interdependencies contribute to the stability of the population, communities, ecosystem and biomes?) • Objective: You will research and explain the importance of submerged aquatic vegetation (SAV) in the Chesapeake Bay in order to describe how the stability of the Bay is dependent on the SAV plants.

  4. The Bay EcosystemIndependent Research and Power Paragraph!Read the article in order to explain the following in writing: What is an ecosystem? What are abiotic and biotic factors in the Chesapeake Bay ecosystem? What is special about the Chesapeake Bay? Provide at least one example of how Chesapeake Bay organisms interact (predator/prey etc). **Review as needed. Students should know this skill from middle school. How do humans affect the Bay?

  5. Power Paragraph Directions Main Idea Ecosystems

  6. Types of Aquatic Systems Rivers & Streams Lakes & Ponds Wetlands Estuaries Groundwater Where do you think we are? Marine system

  7. Types of Aquatic SystemsWhat type of system is the Chesapeake Bay? Rivers & Streams Lakes & Ponds Wetlands Estuaries Estuary! A body of water that has fresh water (from rivers, streams etc) and salt water connections. Groundwater Marine system

  8. Habitat ZonesWhere are the submerged aquatic vegetation in this picture?

  9. Littoral Zone- The intertidal zone is the area where land and sea meet. This zone is covered with water at high tide, and exposed to air at low tide. The land in this zone can be rocky, sandy or covered in mudflats. Within the intertidal, there are several zones, starting near dry land with the splash zone, an area that is usually dry, and moving down to the littoral zone, which is usually underwater. • Functions • Intercepts Nutrients • Refuge from Predators • Nursery for Fish

  10. Pelagic Zone-The open ocean, or pelagic zone, is the area of the ocean outside of coastal areas, and where you’ll find some of the biggest marine life species. The sea floor (demersal zone) is not included in the pelagic zone. • Functions • Plankton • Zooplankton

  11. Pelagic Zone • Submerged Aquatic Vegetation (SAV) • Nutrient uptake • Sediment stabilization • Habitat • Oxygen production

  12. Trophic State Change • How are these 3 pictures different? • How are the trophic levels different at each level? • Which has the fewest organisms? • Which has the most organisms?

  13. Low nutrients Low primary productivity Low grazers and insects Low fish production Clear water Sandy/low organic matter on bottom Oligotrophic- Low productivity/diversity

  14. Moderate nutrients Increased primary productivity More grazers and insects More fish production Moderate water clarity More aquatic plants Some organic sediment accumulation TROPHIC STATE Mesotrophic- Medium productivity/diversity

  15. High nutrients High primary productivity Large number of grazers and insects Moderate fish production Low water clarity, or Clear with aquatic plants High organic sediment accumulation TROPHIC STATE Eutrophic- High productivity/diversity

  16. Summarize what you learned today! Main Idea SAV Plants in the Chesapeake Bay

  17. Independent Research • Chesapeake Bay Journal • Submerged Aquatic Vegetation

  18. Other helpful slides below:

  19. Limiting Nutrient Concept …Plants need nutrients to grow • Nitrogen and Phosphorus are the main nutrients • For every unit of N you need so many units of P • If one nutrient is not in sufficient supply it will limit the total production potential.

  20. Summary • Lakes have longer residence time and more light than other freshwater systems • Littoral Zone, Pelagic Zone, Submerged Aquatic Vegetation • Nutrients regulate algae > grazers > fish • Removing algae doesn’t remove nutrient regulator • Phosphorus is typical nutrient limiting nutrients depending on N:P ratio Stormwater ponds respond just like lakes do to nutrients

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