World Biomes Follow along with your note packet to add notes as you watch the power point presentation.
http://www.cotf.edu/ete/modules/msese/earthsysflr/ http://www.cotf.edu/ete/modules/msese/earthsysflr/
Tropical Rainforest Abiotic factors high biodiversity and biomass both hot and moist; ideal for bacteria and other microorganisms; they quickly decompose matter on the forest floor allowing nutrients to be recycled. <1 cm of topsoil About 100 in/yr of rainfall
Bougainvillea Sunlight is a major limiting factor Plants grow in layers (canopy receives most light) Little sun reaches the floor
Many symbiotic relationships Many symbiotic relationships Live in different levels of canopy
Threats to the Tropical Rainforest
Temperate Deciduous Forests Location: found in temperate zone (about 480 North latitude) Much of the human population lives in this biome
Characterized by an abundance of deciduous (leaf bearing) trees Characterized by an abundance of deciduous (leaf bearing) trees Characterized by 4 seasons
More diversity in the deciduous forest vs. the coniferous forest due to increased sunlight. Trees adapt to varied climate by becoming dormant in winter
Adapt to many seasons Adapt to many seasons Lose Winter Coat
Threats to Temperate Deciduous Forests
Taiga aka Northern Coniferous Forest or Boreal Forest
Taiga Taiga Abiotic factors Winters are long and cold Averages 100 in/yr precipitation—mostly snow Soil poor in nutrients and very acidic Growing season is very short
Balsam Fir Roots long to anchor trees Needles long, thin and waxy Low sunlight and poor soil keeps plants from growing on forest floor http://www.inchinapinch.com/hab_pgs/terres/coniferous/plants.htm
Moose Adapt for cold winters Burrow, hibernate, warm coat, insulation, etc. http://www.inchinapinch.com/hab_pgs/terres/coniferous/animals.htm
Threats to the Taiga
Grasslands
Savannas (Tropical Grasslands) Savannas (Tropical Grasslands) Contain the greatest number of grazing animals on Earth. Location: Found in the tropics…near equator Amount of precipitation supports tall grasses but only occasional trees. The word savanna stems from an Amerind term for plains http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/savanna/savanna.html
Tropical Savanna Abiotic Factors Rainy and dry season Fire plays a large role in this ecosystem http://www.cotf.edu/ete/modules/msese/earthsysflr/savannah.html
Whistling Thorn
Adapt for short rainy season—migrate as necessary Adapt for short rainy season—migrate as necessary Limited food leads to vertical feeding
Steppe Dry, cold, grasslands
The most abundant are plants called Bunch grasses, fine bladed grasses that grow in clumps to preserve water.
http://www.blueplanetbiomes.org/steppe_animal_page.htm
Prairie and Steppe: Prairie and Steppe: Grassland areas 50-75 cm/yr Characteristic high winds
Sod-forming grasses that won’t dry out or blow away in wind. Fleabane http://www.blueplanetbiomes.org/prairie_plants_page.htm
Many adaptations to survive extremes
Desert Abiotic factors Desert Abiotic factors <10 in/yr of rain Little to no topsoil due to high winds. Minerals not deep in soil Too dry for decay Usually very hot days and very cold nights http://www.cotf.edu/ete/modules/msese/earthsysflr/taiga.html
Joshua Tree http://www.blueplanetbiomes.org/desert_plant_page.htm Desert Plant Adaptations: Spines Succulents Thick, waxy cuticle
Desert Animal Adaptations: Get water from food Thick outer coat Burrow during day Large ears Often are nocturnal Smaller animals = less surface area http://www.blueplanetbiomes.org/desert_animal_page.htm
http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tundra/tundra.html
Tundra Abiotic Factors Tundra Abiotic Factors <25 in/year Temperature rarely higher than 100C Permafrost layer Short growing season
Perennials
Many visitors, migration Few predators Little Competition
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