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Welcome to Mr. Taylor's 6th Grade Science Class! This page was created to keep both students and parents connected to the classroom. Science is now everywhere.

Monday, April 18, 2011

Unit A-Chapter 4-Lesson 5

What Are The Features of Water Biomes?

Saltwater Biomes

The saltwater biome is a water biome that has a high salt content
The saltwater biome is the largest of all the earth's biome.
  • it can be divided into three zones:
  1. Shallow Ocean Zone
  2. Ocean Surface Zone
  3. Deep Ocean Zone
  • The shallow ocean zone along the coasts makes up only a small part of the saltwater biome.
  • Sunlight reaches the sea bottom in this zone, and the water temperature remains relatively constant
  • Sunlight penetrates the top few hundred meters of the ocean surface zone.  Here, photosynthesizing plankton are the primary producers; consumers include tuna, sharks, whales, and ocean birds.
  • Plankton are microscopic, free floating organisms that serve as food for larger organisms.
  • The deep ocean zone consists of everything deeper than 100 meters.
  • Too little sunlight penetrates the cold waters of the deep ocean zone to support photosynthetic organisms.
  • Most animals in the deep ocean eat other animals or feed on detritus that drifts from the sunlit waters above.
Freshwater Biomes

Freshwater biomes have a low salt content and can be divided into two types:
  1. those with standing water, such as lakes and ponds
  2. those with flowing water, such as rivers and streams
  • Lakes are usually larger and deeper than ponds and may be deep enough to have a colder, deeper layer that receives little or no sunlight.
  • Most organisms live in the upper, sunnier part of the lake.
  • Producers include floating and shallow-water plants.
  • Consumers include fish, insects, frogs, beavers, and birds.
  • Decomposers live at the bottom of the lake.
  • Rivers and streams have moving water.
  • The quick flow of water oxygen to the water, which allows certain organisms such as trout to live there.
  • Insect larvae, algae, and worms live on rocks in the streams.
  • Water plants are able to take root in areas of a stream where water flows more slowly.

  • In an estuary biome, fresh water from the rivers or streams mixes with slat water from the ocean.
  • Water in an estuary is usually warmer than ocean water and contains less salt.
  • Salt content changes with tides; During high tides, more ocean water flows in, so the water is saltier than when the tide is out.
  • Estuaries are important breeding grounds for fish, shellfish, and birds.
  • Fish and shellfish release their eggs in estuaries because there is plenty of plankton available on which the hatchlings can feed.
  • Migratory birds such as geese and ducks rest and feed in estuaries.

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