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Biomes PowerPoint PPT Presentation

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Biomes. Chaparral Desert Savanna Taiga Temperate Deciduous Forests Temperate Grassland Tropical Rain Forest Tundra. epiphytes. succulents. Biotic factors. Abiotic factors. wetland. Areas where land is periodically underwater. plankton.

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  • Chaparral

  • Desert

  • Savanna

  • Taiga

  • Temperate Deciduous Forests

  • Temperate Grassland

  • Tropical Rain Forest

  • Tundra





Biotic factors

Biotic factors

Abiotic factors

Abiotic factors



Areas where land is periodically underwater.



Organisms that cannot swim against currents, they are drifters. The majority are microscopic.



  • Free swimming organisms, such as fish, turtles, and whales.



  • Bottom dwelling organisms, such as mussels, worms, and barnacles.

  • (Many live attached to hard surfaces)

Littoral zone

Littoral zone

  • Nutrient rich zone near the surface of a lake or pond

Benthic zone

Benthic Zone

  • The bottom of the pond or lake, which is inhabited by decomposers, insect larvae, and clams.



  • An increase in the amount of nutrients in an aquatic ecosystem.

Factor 1 salinity salinity the amount of dissolved salts in the water

Factor 1 – Salinity(salinity- the amount of dissolved salts in the water)

Fresh Water Ecosystem

Marine Ecosystem

Factor 2 sunlight

Factor 2 - Sunlight

  • Sunlight only reaches a certain distance below surface, so it effects the location of where photosynthetic organisms can live

Factors 3 oxygen

Factors 3 : Oxygen

  • Non photosynthetic organisms need oxygen to survive, so the amount of oxygen in an ecosystem determines how much life can be supported there.

Factor 4 nutrients

Factor 4: Nutrients

  • All organisms need nutrients to survive, but too much can be cause eutrophication

Factor 5 temperature

Factor 5: Temperature

  • Temperature controls the solubility of oxygen. As temperature increases, oxygen is less soluble.

  • Also influence the biological activity of aquatic organisms

Grouping of aquatic organisms

Grouping of aquatic organisms

  • Plankton Nekton Benthos

Ecosystems lakes and ponds

Ecosystems: Lakes and Ponds

How they form:

Naturally, where groundwater reaches Earth’s surface

Unnaturally – damming or rivers by humans or beavers

Life in a lake

Life in a lake

Life in the littoral zone

Life in the benthic zone


Littoral zone

Benthic Zone



Fish adapted to cooler water

Insect larvae


  • Rooted Plants, such as cattails

  • Further from shore – no rooted plants, instead there are phytoplankton

  • Fish

  • Insects

  • amphibians



  • Eutrophic lake – a lake that has a large amount of algae and plant growth



Fresh water wetlands

Fresh Water Wetlands



Dominated by woody plants (trees and shrubs)

-Occur on flat, poorly drained land often near streams

Species of trees depends on salinity

Birds such as wood ducks

Ideal habitat for amphibians (frogs, salamanders, etc)

Reptiles (ex. Alligator)

-Contain non woody plants (cattails)

-Tend to have low, flat lands and little water movement

-Benthic zones are nutrient rich and contain plants, decomposers, and scavengers

-Wide variety of water birds (ducks, herons, etc)

-Migratory birds

-Salinity varies(some slightly saline, some as salty as the ocean)

Marsh or swamp

Marsh or Swamp?

Marsh or swamp1

Marsh or Swamp?

Marsh or swamp2

Marsh or Swamp?

Marsh or swamp3

Marsh or Swamp?

Environmental functions of wetlands

Environmental Functions of wetlands

  • Absorb and remove pollutants from water that flow through them

  • Control flooding by absorbing extra water when rivers overflow

  • Provide spawning grounds and habitat to fish and shellfish we consume

  • Provide habitat for native and migratory wildlife (many which are rare, threatened, and endangered)



  • Many originate from snow melt in mountains.

    At it’s headwaters river is cold and full of oxygen

    -As it flows down mountain it becomes warmer, wider, and slower, containing more vegetation and less oxygen

    As it flows nutrients are added to river from sediment and runoff

Life in a river

Life in a river

At headwaters


Plants set roots in river’s rich sediment

Fish such as catfish and carp

  • – mosses anchor to rocks

  • Trout and minnows adapted to cold, oxygen-rich water

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