Ponds and Lakes

Ponds and Lakes are often called __________ ecosystems because they have ___________ water, unlike rivers or streams.

Have shallow enough water for rooted plants to grow across it.

• Pond

• Lake

Water stays warm throughout the day from top to bottom

• Pond

• Lake

• River

• Stream

Deeper water?

• Pond

• Lake

• River

• Stream

Why is lake water colder throughout the day?

• Where it is located

• Because it is deeper

• Because the water is moving

• Because it gets less sun

Plants rooted in the bottom of the pond but have leaves and stems that float on the surface or grow above the surface

• Emergent Plants

• Floating Plants

• Submersed Plants

Broad, flat-leafed plants like water lilies and duckweed.

• Emergent Plants

• Floating Plants

• Submersed Plants

Grow completely underwater until it is time to have their flowers pollinated. (Pondweed is a type of this plant)

• Emergent Plants

• Floating Plants

• Submersed Plants

Area closest to the shore where aquatic plants grow

• Littoral Zone

• Limnetic Zone

• Profundal Zone

• Benthic Zone

Open surface waters of the lake away from the shore

• Littoral Zone

• Limnetic Zone

• Profundal Zone

• Benthic Zone