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4.4 Biomes Pg.110-113
Transcript of 4.4 Biomes Pg.110-113
Abiotic Factors- warm year round; alternating wet and dry seasons; rich soils subject to erosion.
Plant Life- Adaptations to survive the dry season include seasonal loss of leaves.
Animal Life- Many animals reduce their need fro water by entering long periods of inactivity called estivation.
1. What abiotic and biotic factors characterize biomes?
Biomes are described in terms of abiotic factors like climate and soil type, and biotic factors like plant and animal factor.
Tropical Rain Forest
Abiotic Factors- hot and wet year-round; thin, nutrient-poor soils subject to erosion.
Plant Life- Understory plants compete for sunlight, so most have large leaves that maimize capture limited light. Tall trees growing in poor shallow soil often have buttress roots for support. Epiphytic plants grow on the branches of tall plants as opposed to soil. This allows epiphytes to take advantage of available sunlight while obtaining nutrients through their host.
Animal Life: Animals are active all year. Many animals use camouflage to hide from predators; some can chage color to match their surroundings. Animals that livein the canopy have adaptations for climbing, jumping, and/or flight.
The Major Biomes
Regional Climates: Cold ocean currents that flow north to south have the same effect of making summers in the region cool relative to other places at the same altitude.
Defining Biomes: Major biomes include tropical rain forest, tropical dry forest, tropical grassland/ savanna/ shrubland, desert, temperature grassland, temperature woodland and shrubland, temperature forest, northwestern temperature forest, boreal forest/taiga, and tundra.
Canopy- dense covering formed by the leafy tops of tall rain trees.
Understory- layer in a rain forest found underneath the canopy formed by shorter trees and vines.
Deciduous- term used to refer to a type of tree that sheds its leaves during a particular season each year.
4.4 Biomes Pg.110-113
Sarah Mostafa and Lexi Bombenger
Tropical Grassland/ Savanna/ Shrubland
Abiotic Factors- warm; seasonal rainfall; compact soils; frequent fires set by lighting.
Plant Life- Plant adaptations are similar to those in the tropical dry forest, including waxy leaf coverings ans seasonal leaf loss.
Animal Life- Many animals migrate during the dry season in search of water. Some smaller animals burrow and remain dormant during the dry season.
Abiotic Factors- low precipitation; variable temperatures; soils in rich minerals but poor in organic material
Plant Life- Many plants, including cacti, store water in their tissues, and minimize leaf surface area to cut down on water loss.
Animal Life- Mnay desert animals get the water they need from the foosd they eat.
Abiotic Fcators- warm to hot summers; cold winters; moderate seasonal precipitation; fertile soils; occasional fires.
Plant Life- Grassland plants- specially grasses, which grow from their base- are resistant to grazing and fire.
1. Define Canopy....
Temperate Woodland and Shrubland
Abiotic Fcators- hot dry summers; cool moist winters; thin, nutrient-poor soils; periodic fires.
Plant Life- Plants in this biome have adapted to drought.
Animal Life- Animals tend to be browsers-meaning they eat varied diets of grasses, leaves, shrubs, and other vegetation.
1. Dense covering formed by the leafy tops of tall rain trees.
2. What are the major biomes?
2. Defining Biomes: Major biomes include tropical rain forest, tropical dry forest, tropical grassland/ savanna/ shrubland, desert, temperature grassland, temperature woodland and shrubland, temperature forest, northwestern temperature forest, boreal forest/taiga, and tundra.
3. True or False:
Cold ocean currents that flow north to south have the same effect of making summers in the region cool relative to other places at the same altitude.