Terrestrial Biomes.

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Presentation transcript:

Terrestrial Biomes

What is a Biome? Biomes – large regions characterized by a specific type of climate and certain types of plant and animal communities

What is a Biome? Biomes are described by their vegetation because plants that grow in an area determine the other organisms that can live there

What is a Biome? Climate is the average weather conditions in an area over a long period of time. Temperature and precipitation are the two most important factors that determine a region’s climate.

What is a Biome? Biomes that do not receive enough rainfall to support large trees support communities dominated by small trees, shrubs, and grasses.

What is a Biome? Latitude – the distance north or south from the equator, and is expressed in degrees Altitude – the height of an object above a reference point, such as sea level or the Earth’s surface As latitude and altitude increase, biomes and vegetation change

What is a Biome?

Tropical Rain Forests Of all the biomes in the world, forest biomes are the most widespread and the most diverse.

Tropical Rain Forests Tropical rain forests are forests or jungles near the equator and contain the greatest known diversity of organisms on Earth.

Tropical Rain Forests

Climograph

Tropical Rain Forests There are four main layers of the rain forest: The Emergent Layer The Upper Canopy The Lower Canopy The Understory

Tropical Rain Forests

Tropical Rain Forests The emergent layer is the top foliage layer in a forest where the trees extend above surrounding trees. Animals such as eagles, bats, monkeys, and snakes live in the emergent layer.

Tropical Rain Forests The canopy is the layers of treetops that shade the forest floor, and is considered to be the primary layer of the rain forest.

Tropical Rain Forests Understory – the foliage layer that is beneath and shaded by the main canopy of a forest Little light reaches this layer allowing only trees and shrubs adapted to shade to grow there.

Temperate Deciduous Forests The range of temperatures can be extreme, with summer temperatures soaring to 95ºF and winter temperatures often falling below freezing. Dominated with trees that shed their leaves

Temperate Deciduous Forests

F = 9/5 (C+32)

Taiga The taiga is the region of evergreen, coniferous forest below the arctic and subarctic tundra regions. The taiga has long winters and little vegetation.

Taiga

Taiga A conifer is a tree that has seeds that develops in cones. Their leaves’ arrow shape and waxy coating helps them to retain water in the winter.

Savanna Plains full of grasses and scattered trees and shrubs Many animals are only active during the wet season

Savanna Grass fires help to restore nutrients to the soil during the dry season

Savanna

Grassland Dominated by grasses and has some trees Few trees survive on the grasslands because of the lack of rainfall, fire, and constant winds Characterized by hot summers and cold winters

Grassland The roots system of prairie grasses form dense layers that survive drought and fire allowing the plants to come back from year to year.

Grassland

Chaparral Temperate woodland biome with vegetation that includes broad leafed evergreen shrubs

Chaparral

Desert Regions that have little or no vegetation, long periods without rain, and extreme temperatures

Desert Deserts are often located near large mountain ranges because mountains can block the passage of moisture-filled clouds, limiting precipitation

Desert

Desert Succulents – plants with thick, fleshy stems and leaves that conserve water Most desert animals are nocturnal

Tundra A treeless plain that is located in the Arctic or Antarctic and that is characterized by very low winter temperatures, short, cool summers, and vegetation that consists of grasses, lichens, and perennial herbs

Tundra Permafrost – the permanently frozen layer of soil or subsoil

Tundra