Aquatic Ecosystems Aquatic Ecosystems Freshwater Ponds Lakes Streams
































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Aquatic Ecosystems

Aquatic Ecosystems • Freshwater –Ponds & Lakes –Streams & Rivers –Wetlands • Marine – Mangroves *Sargasso Sea – Open Oceans – Coral Reefs – Estuaries – Hydrothermal vents – Kelp Forest

Freshwater • Ponds & Lakes • Streams & Rivers • Wetlands

Freshwater Ponds • Freshwater=low salt (<1%) • Ponds – seasonal or 100+ years, limited species • Ponds -3 Zones based on sunlight • Photosynthesis impacts species


Parts of a lake – How would each layer be affected by light and oxygen?

A Lake Ecosystem

Ponds and Lakes

Streams & Rivers • Water moving in one direction • Headwaters Mouth • Water is cleaner until the end www. noaa. gov/str-plan/images/river. gif

Stream vs. River • Trout stream, NW NJ Mississippi R. Greenville, MS

Mouth • Mississippi River delta Review question: What Is the difference Between a delta and an Alluvial fan?

Life in a River • Mosses anchor themselves to rocks. • Trout and minnows are adapted to the cold, oxygen rich water. • Plankton can float in the warmer, calmer waters. • Plants here can set roots in the river’s rich sediment. • Fish such as catfish and carp also live in these calmer waters.

Streams & Rivers

Rivers in Danger • Trash • Pollution • Run-off from Agriculture

Wetlands • Standing water that support aquatic plants Examples: Marshes, swamps, and bogs – Lots of diversity –Fresh or Brackish –Help to reduce flooding –Filter pollution

Freshwater Wetlands

Environmental Functions of Wetlands

Plants Wetlands • Moist and humid conditions Pond lilies Cattails Tamarack Gum Sedges Black Spruce Cypress

Human Impact on Wetlands • Used to think they were breeding ground for insects • Most have been cleared for development • Laws protect wetlands now

Wetlands • CA OR AK

River Otter Wetlands Damselfly Crayfish Catfish Snails Leech Sculpin Minnow Dragonfly Mayfly Bluegill Bass Snakes Frog Great Blue Heron Canadian Goose Turtle

Eutrophication • Too many nutrients • Phosphorus (Detergent) • Nitrogen (Fertilizer, Animal Waste) • NOT GOOD- Plants overgrow • Cuts off light and oxygen levels

Marsh • Lots in U. S. • Occur along streams • Wet soil and no trees

Swamp • Wood vegetation • Common in Southeast U. S.

Mangroves – trees grow in salty water

Plants and Animals of Estuaries • Rooted plants and plankton. • Provide food for plants. • Oysters and Clams on rocks • Can tolerate variations in salinity

Threats to Estuaries • Trash • Pollutants- sewage, pesticides, fertilizers, and toxic chemicals.

Estuaries • Estuary is an area where fresh and salt water mix – Very productive- nutrients from river and not in ocean so they are protected from waves

Sargasso Sea- affected by currents

Kelp Forest-protection/food

Hydrothermal Vents- deep ocean, chemosynthesis

Review Questions • Name one example of a freshwater vs. marine ecosystem • Describe 1 characteristic of a… freshwater pond, stream/river, wetland, marsh, swamp, estuary, mangrove, Sargasso Sea, Kelp Forest, Hydrothermal Vent. • What are the benefits of wetlands and why are they being destroyed? • What is Eutrophication? • Which ecosystems are in North Carolina?
Profundal zone
Mardu graw
Fun facts about freshwater ecosystems
Lentic ecosystem
Describe freshwater
4-4 aquatic ecosystems answer key
Savanna biome plants
Interest grabber
Aquatic vs terrestrial
Lesson outline lesson 2 aquatic ecosystems answer key
Chapter 7 aquatic ecosystems test answers
Chapter 6 biomes and aquatic ecosystems
Ecosystem webquest
What factors describe aquatic ecosystems
Section 3 aquatic ecosystems worksheet answers
Biomes and aquatic ecosystems
Chapter 3 lesson 3 biomes and aquatic ecosystems
Section 4-4 aquatic ecosystems
Section 4-4 aquatic ecosystems
Chapter 7 environmental science
Aquatic ecosystems webquest
Lesson 3: aquatic ecosystems
4-4 aquatic ecosystems
Coir rolls for ponds
Aerobic ponds
Pond ecosystem biotic and abiotic factors
Piute ponds
Management of rearing ponds
What condition threatens peeta’s life?
Post stocking management
The great ponds
Oxidation ponds
Lentic lake