StandingWater Ecosystems There are two main categories of

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Standing-Water Ecosystems There are two main categories of freshwater ecosystems What is the main

Standing-Water Ecosystems There are two main categories of freshwater ecosystems What is the main difference between these two ecosystems?

• Standing water v. flowing-water ecosystems • Standing water—staying still, not moving •

• Standing water v. flowing-water ecosystems • Standing water—staying still, not moving • Flowing-water ecosystems—MOVING water – Organisms living in flowing water ecosystems have special adaptations. WHY? What are the challenges associated with living in a flowing water ecosystem? • Classify the following as standing or flowing water ecosystems – Pond – river – Swamp --stream --lake

Types of standing-water ecosystems • Lake—the deepest type, main producers are phytoplankton (floating algae)

Types of standing-water ecosystems • Lake—the deepest type, main producers are phytoplankton (floating algae) • Pond—More Shallow (less deep) than lakes. Main producers are plants that grow on the bottom • Marsh—VERY shallow, saturated (wet) soil, low oxygen in water, Plants that have roots on the bottom come out on the top (emergent). Mostly grasses. • Swamp—Shallow like a marsh, with oxygen poor soil (anoxic) but dominant vegetation is trees • Bog—Inland wetland with little movement of water in or out. Slow decomposition. Sphagnum moss is the dominant organism.

• Plankton is any organisms that drift in the water. • Phytoplankton are

• Plankton is any organisms that drift in the water. • Phytoplankton are like plants in that they carry out photosynthesis. (The prefix phyto means plant) • Zooplankton are like animals in that they cannot carry out photosynthesis, and are heterotrophs. (The prefix zoo means animal.

What are the types of wetlands that we’ve talked about? • Wetlands are ecosystems

What are the types of wetlands that we’ve talked about? • Wetlands are ecosystems in which the roots of plants are submerged under water at least part of the year. • Emergent plants—roots are under the water but tops are out of the water

Benefits of Wetlands • Wetlands can have fresh or brackish water. What does that

Benefits of Wetlands • Wetlands can have fresh or brackish water. What does that mean? They can have only standing water or some flowing water. • Wetlands are an endangered ecosystem because people don’t typically see as much value in them. They aren’t traditional places of recreation. • Sometimes they stink like methane, or are full of insects • BUT, wetlands act as natural filters, and breeding and resting grounds for aquatic organisms and waterfowl

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