World's Major Communities

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Worlds Major Communities:


Biomes There are two main types of biomes Land Aquatic (water)

We will speed through both today

Land Biomes Land biomes1. Tropical Rain forest 2. Tropical Dry Forest 3. Tropical Savanna 4. Desert 5. Temperate Grassland 6. Temperate Woodland and Shrubland 7. Temperate Forest 8. Northern Coniferous Forest 9. Boreal Forest or Taiga 10. Tundra

Tropical rain forest Tropical dry forest Tropical savanna

Temperate grassland Desert Temperate woodland and shrubland

Temperate forest Northwestern coniferous forest Boreal forest (Taiga)

Tundra Mountains and ice caps

Biome Tropical Rain Forest Tropical Dry Forest Tropical Savanna Desert Temperate Grassland Temperate woodland and Shrubland Temperate Forest Northwestern Coniferous Forest Boreal Forest Tundra

Ten Major Biomes Precipitation Temperature Soil high hot poor variable variable low moderate mild mild variable summer hot rich clay poor rich poor

Diversity high moderate moderate moderate moderate low

Trees dense medium sparse sparse absent medium

Grasses sparse medium dense sparse dense medium

summer low, summer hot winter moderate moderate summer moderate, winter cold high summer mild, winter cold moderate low summer mild, winter cool summer mild, winter cold





rocky, acidic




poor, acidic moderate poor low

dense absent

sparse medium

Aquatic biomes There are 3 main types of aquatic biomes. Can you guess what might be the difference in the water for each biome? Salt content

The 3 main types of aquatic biomes Freshwater Marine (saltwater) Estuaries

Freshwater Pond EcosystemSection 4-4 SpoonbillFrogs lay eggs in the shallow water near shore.The eggs hatch in the water as tadpoles and move to the land as adults.

The shore is lined with grasses that provide shelter and nesting places for birds and other organisms.

Duck Water lilies


Mosquito Duckweed larvae

Dragonfly Phytoplankton

Snail The roots of water lilies cling to the pond bottom, Pickerel Diving beetle Fish share the pond while their leaves, on long with turtles and other flexible stems, float on the animals. Many of surface. them feed on insects at the waters edge. Trout The bottom of the pond is inhabited by decomposers and Hydra other organisms that feed on particles drifting down from the Snail Crayfish surface.

Plankton and the organisms that feed on them live near the surface where there is enough sunlight for photosynthesis. Microscopic algae are among the most important producers.

Benthic crustaceans

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Figure 4-17 Zones of a Marine EcosystemSection 4-4

land Coastal ocean Open ocean

200m 1000m

Photic zone


Aphotic zone


Ocean trench 10,000mContinental shelf Continental slope and continental rise Abyssal plain

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Tundra Tundra Located near the poles Treeless biome covered by moss, lichens, and grasses Permafrost a layer of permanently frozen subsoil

Boreal Forest Boreal Forest or Taiga Covered by coniferous (cone bearing) trees. Bears, wolves, moose, elk are some of the typical animals

Temperate Forest Temperate forest Plants change during the seasons (leaves change color)

Grasslands Grasslands Most of the rainfall occurs in one part of the season Hot summers, cold winters

Tropical Rain Forest Tropical rain forest Receive 200-400 centimeters of rain a year Constant temperature. Home of the most types of animals than any other biome. Many colorful

Deserts Deserts Less than 25 cm of rain falls a year Both plants and animals must be able to retain moisture. Birds, lizards, snakes, insects are typical Cactus and sagebrush sparsely cover the area

Freshwater biomes Rivers, streams, and lakes

Marine Biomes Includes all of the ocean Marine biomes are divided into 4 subcategories Intertidal zone Neritic zone Open-sea zone Deep-sea zone

Estuaries Estuaries are the boundaries between freshwater and saltwater. Since it is a mix of the two, a variety of organisms can be supported. Examples of estuaries Delta, swamp, lagoon