1 / 21

Freshwater Biomes

Freshwater Biomes. Four different freshwater ecosystems. Ponds/Lakes Streams Rivers Wetlands: marshes & swamps. Freshwater Biomes. Freshwater contains less than 1% salt. The main abiotic factors that determine the type of aquatic biome are: sunlight, temperature and salinity.

hermanb
Download Presentation

Freshwater Biomes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Freshwater Biomes

  2. Four different freshwater ecosystems • Ponds/Lakes • Streams • Rivers • Wetlands: marshes & swamps

  3. Freshwater Biomes • Freshwater contains less than 1% salt. • The main abiotic factors that determine the type of aquatic biome are: sunlight, temperature and salinity. • Sunlight and nutrients determine the distribution of organisms. The warmer the water the more life, the more food the more life.

  4. Ponds and Lakes • Scattered all over • Can be a few square meters to square kilometers • Ponds seasonal, lakes can last hundreds of years • 4 main zones • Littoral • Limnetic • Profundal • Benthic- bottom or floor

  5. Freshwater zones:

  6. Littoral Zone: • Located at the land at the edge of the water, shallow • Warmest water • Receives the most sunlight • Flora:cattails, rushes, water lilies, & weeds, plants rooted to the bottom • Fauna: snails, insects & larvae, clams, worms,, frogs, salamanders, turtles, fish, & snails

  7. Open Water Zone or Limnetic Zone • Located from the littoral zone across the top of water & goes as deep as light can reach, shallow water • Fauna:plankton,and fish, algae, microscopic Crustaceans, bass and trout • Plankton are small organisms that play a crucial role in the food chain.

  8. Profundal ZoneDeep Water Zone • Deepest freshwater zone • Coldest water • No light in this zone • Fauna: catfish, carp, worms, insect larvae, fungi, bacteria, crustaceans • All of these are bottom feeders and eat the dead things that fall to the bottom

  9. Benthic Zone • Benthic Zone is the area at the bottom of a lake or pond • The bottom is covered with dead and decaying plants and animals • Also covered with a layer of sediment

More Related