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Welcome to Class! Friday 9-11
Complete the following: Take out Ecological Pyramid Lab and Food Web
Reconstruction Lab New entry “Biomes” Finish Vocabs 1-4 (many of you haven’t)
Agenda Lecture notes on Biomes
Ecological succession worksheet Review Symbiosis Relationship if time allow
Homefun: Cornell Notes on “Population Growth 9-14 and 9-15” Next Friday 9-18 is our Unit One Test!!! Study!
Biomes
Learning Objectives Describe what biotic and abiotic factors characterize
biomes. Identify the areas that are not classified into a major
biome.
Regional Climates
Upwind side Downwind side
Air rises and cools, releasing moisture.
Air descends, warms, and becomes drier, decreasing moisture.
Earth’s Biomes
Reading a Climate Diagram
Tropical Rain Forest
Abiotic: warm and wet year-round; soils are thin and nutrient-poor
Abiotic: warm and wet year-round; soils are thin and nutrient-poor
Biotic: plants with large leaves and buttress tree roots; animals active year-round
Biotic: plants with large leaves and buttress tree roots; animals active year-round
Tropical Dry Forest
Rainy season
Abiotic: warm year-round; alternating wet-dry seasons; rich soils
Abiotic: warm year-round; alternating wet-dry seasons; rich soils
Biotic: deciduous plants, waxy plant leaves; many animals estivate or migrate
Biotic: deciduous plants, waxy plant leaves; many animals estivate or migrate
Tropical Grassland/Savanna/Scrubland
Biotic: plants with waxy leaves, seasonal leaf loss; many animals migrate or are dormant during dry season
Biotic: plants with waxy leaves, seasonal leaf loss; many animals migrate or are dormant during dry season
Abiotic: warm; seasonal rainfall; compact soils; frequent fires set by lightning
Abiotic: warm; seasonal rainfall; compact soils; frequent fires set by lightning
Desert
Precipitation, not temperature, defines deserts.
Biotic: small plant leaves; many animals nocturnal, many get water from their food
Biotic: small plant leaves; many animals nocturnal, many get water from their food
Abiotic: low precipitation; variable temperatures; soils poor in organic material
Abiotic: low precipitation; variable temperatures; soils poor in organic material
Temperate Grassland
Biotic: plants resistant to grazing and fire; small animals use camouflage and burrowing as protection
Biotic: plants resistant to grazing and fire; small animals use camouflage and burrowing as protection
Abiotic: warm summers, cold winters; moderate precipitation; fertile soils; occasional fires
Abiotic: warm summers, cold winters; moderate precipitation; fertile soils; occasional fires
Temperate Woodland and Shrubland
High threat of wildfire
Biotic: plants adapted to drought and fire; animals commonly browsers
Biotic: plants adapted to drought and fire; animals commonly browsers
Abiotic: warm, dry summers; cool, moist winters; nutrient-poor soils; periodic fires
Abiotic: warm, dry summers; cool, moist winters; nutrient-poor soils; periodic fires
Temperate Forest
Biotic: deciduous trees; some animals hibernate, some migrate in winter
Biotic: deciduous trees; some animals hibernate, some migrate in winter
Abiotic: cold winters, warm summers; year-round precipitation; fertile soils
Abiotic: cold winters, warm summers; year-round precipitation; fertile soils
Northwestern Coniferous Forest
Biotic: dense plant growth, tall trees; many animals have varied diets
Biotic: dense plant growth, tall trees; many animals have varied diets
Abiotic: mild temperatures; abundant precipitation in fall, winter, and spring; cool, dry summers; rocky, acidic soils
Abiotic: mild temperatures; abundant precipitation in fall, winter, and spring; cool, dry summers; rocky, acidic soils
Boreal Forest
Biotic: dark-green conifers; many animals have extra insulation, some migrate in winter
Biotic: dark-green conifers; many animals have extra insulation, some migrate in winter
Abiotic: long, cold winters; mild summers; moderate precipitation; acidic, nutrient-poor soils
Abiotic: long, cold winters; mild summers; moderate precipitation; acidic, nutrient-poor soils
Tundra
Low precipitation
Biotic: small plants growing low to the ground; many animals migrate in winter or have heat-saving adaptations
Biotic: small plants growing low to the ground; many animals migrate in winter or have heat-saving adaptations
Abiotic: strong winds; low precipitation; short, soggy summers; long, cold, dark winters; permafrost
Abiotic: strong winds; low precipitation; short, soggy summers; long, cold, dark winters; permafrost
Other Land Areas
Mountain ranges and polar ice caps are not easily defined by typical plant and animal communities.
Overview: Biomes
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