2.9 Major Aquatic Ecosystems Pages 60-62. Freshwater Ecosystems salt concentration below 1% Puddles...
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Transcript of 2.9 Major Aquatic Ecosystems Pages 60-62. Freshwater Ecosystems salt concentration below 1% Puddles...
2.9 Major Aquatic Ecosystems
Pages 60-62
Freshwater Ecosystemssalt concentration below 1%
• Puddles• Ponds• Rivers• Streams• Lakes
Rivers and Streams
Run from high elevations to low elevations
Animals that live in rivers and streams
• Organisms must swim or anchor themselves to the bottom
Plants
Freshwater Ecosystems
Oligotrophic lake• Deep• Cold• Nutrient poor• Clear
Plants that live in oligotrophic lakes
• Few algae• Few rooted plants
Animals that live in oligotrophic lakes
• Lake trout small mouth bass
• crayfish
Eutrophic Lakes
• High in nutrients• Many plants and algae• Cloudy with microscopic plankton
Eutrophic Lakes
• Lots of algae and rooted water plants
Eutrophic Lake Animals
• Very biodiverse
Wetlands and Bogs
• Shallow water• Saturated soils• Nutrient rich• Filters water• Huge biodiversity
Marsh
Bog
Wetlands
Watershed
• An area of land through which all water drains into a single river or lake.
Marine Ecosystems
• Important part of water cycle• 3% salt concentration• Produce oxygen • Absorbs carbon dioxide
Oceans
• Support little life• Open ocean is nutrient poor and deep ocean
is too dark for plants
Oceans
Continental shelves• Rich in nutrients• Huge biodiversity
Oceans
Cover 70% of Earth’s surface
Coral Reefs
• Warm shallow oceans• Huge biodiversity• Tourism• Sensitive
Estuaries
• Fresh water and saltwater environments mix• Shellfish • Rich in nutrients
Mangroves
• Along tropical and semitropical sandy shorelines
• Prevent erosion
The Intertidal Zone
• The area between high tide and low tide• 2 tides a day• Summer and winter extremes and wave action• Seaweeds• Barnacles• Sea stars• urchins
Intertidal zones