world biomes
DESCRIPTION
World Biomes. Taiga aka Northern Coniferous Forest or Boreal Forest. Location : Found only in Northern Hemisphere Russia, Canada, Alaska. Taiga Abiotic factors Winters are long and cold Averages 100 in/yr precipitation—mostly snow Soil poor in nutrients and very acidic - PowerPoint PPT PresentationTRANSCRIPT
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Location: Found only in Northern Hemisphere
Russia, Canada, Alaska
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TaigaAbiotic 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
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Coniferous (needle-bearing) trees are abundant
Roots long to anchor trees Needles long, thin and waxy Low sunlight and poor soil
keeps plants from growing on forest floor
Fireweed
Taiga Plant adaptations
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Adapt for cold winters Burrow, hibernate,
warm coat, insulation, etc.
Great Grey Owl
Animal Adaptations of the Taiga
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Mining operations can irreparably damage this fragile ecosystem.
Pollution left behind can also put animals and plants at risk.
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Tundra
Location: Found north of the Arctic Circle
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Tundra Abiotic Factors <25 in./year Temp rarely higher than 100C Permafrost layer Short growing season
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Tundra Plant AdaptationsGrowing close to the ground
Having shallow roots to absorb the limited water resources.
Trees grow less than 1 m high!
cottongrass
Reindeer lichen
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Many visitors, migration Few predators Little Competition
Small ears Insulation -
thick coatArctic fox
Snowy owl
Grizzly BearTundra Animal Adaptations
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Threats to the Tundra One of the
most fragile biomes on the planet
The tundra is slow to recover from damage.
Oil drilling is proposed in Alaska and other areas!
Tufted Saxifrage
Polar Bear
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Desert Ecosystems
Location: Depending on type of desert, you will find them in various locations.
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Desert Abiotic factors
<10 in/yr of rain
Little to no topsoil due to high winds.
Minerals not deep in soil.
While there are many types of deserts, they all share one characteristic: They are the driest places on Earth!
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Desert Plant Adaptations:
Spines Succulents Thick, waxy
cuticle Shallow, broad
roots
Barrel Cactus
Ocotollio
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Desert Animal Adaptations:
Get water from food Thick outer coat Burrow during day Large ears Smaller animals
Javelina
Bob Cat
Armadillo Lizard
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Threats to the Desert
Residential development
Off road recreational activities destroy habitat for plants and animals.
Some plants are removed by collectors, endangering the population.
Sonoran Desert
Dry Desert
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Temperate Deciduous Forests Location: Found in temperate zone
WHERE WE LIVE!!!
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Characterized by an abundance of deciduous (leaf bearing) trees
Characterized by 4 seasons
Soils: Deep soil layers, rich in nutrients.
Precipitation: 30–100 in/yr in all forms (snow, rain, hail, fog, etc.)
Temperate Deciduous Forests
Abiotic Factors
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White Birch
Lady Fern
Geulder Rose
Temperate Deciduous forest Plant adaptations
Deciduous forests grow in layers
More sunlight reaches the ground compared to a rainforest so you will find more ground dwelling plants.
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Lose Winter Coat
Adapt to many seasons
Eat from different layers of the forest
Bald Eagle
Fat Dormouse
Least Weasel
Temperate Deciduous Forest
Animal Adaptations
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Many forests are cleared to provide housing for humans.
Careful use of the resource can provide a renewable system if we do not take too much habitat away.
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Savannas - Tropical Grasslands- Location: Found in the tropics…near
equator Amount of precipitation supports tall
grasses but only occasional trees.
Contain the greatest number of grazing animals on Earth.
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Tropical Savanna
Prairie
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Tropical SavannaAbiotic Factors Rainy and dry season 25-150 in/yr precipitationFire plays a large role in this ecosystem
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Umbrella Thorn AcaciaTropical Savanna
Plant Adaptations Grows in Tufts Resistance to Drought Many plants have thorns and
sharp leaves to protect against predation.Kangaroos
Paws Baobab
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Adapt for short rainy season—migrate as necessary
Limited food leads to vertical feeding
Reproduce during rainy season—ensures more young survive
Zebras
Chacma Baboon
Tropical SavannaAnimal Adaptations
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Threats to the Tropical Savanna
Invasive species
Changes in fire management
Because of their low elevation, some savannas are threatened by minor rises in sea level associated with global climate change Koala
Elephant
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Prairie: Grassland areas 50-75 cm/yr
Characteristic high Winds
http://www.blueplanetbiomes.org/steppe.htm
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Buffalo Grass
Prairie Plant Adaptations
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Prairie dog
Bobcat
Prairie Animal Adaptations
Geoffrey’s cat
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Tropical Rainforest
Location: Found near equator…little variation in temperatures. No distinct seasonal changes.
Earth's most diverse land biome
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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
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Sunlight is a major limiting factor
Plants grow in layers (canopy receives most light)
Shallow, wide roots since soil is so thin and poor in nutrients
Little sun reaches the floor
Tropical Rainforest
Plant adaptations
Bangul Bamboo
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Many symbiotic relationships
Live in different levels of canopy
Wagler’s pit viperSilvery Gibbon
Slender Loris
Tropical Rainforest
Animal Adaptations
Many animals are specialists and require special habitat components to survive
Camouflage is common
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Humans strip the rainforests for uses including logging and cattle ranching.
In addition to the plants and animals that are displaced by this destruction, entire civilizations of people are also without a home.
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Ponds
• Lakes
• Rivers • Marshes
• Swamps
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Ponds and Lakes Ecosystems Salinity <0.5 ppt. Lake are the deepest of fresh water systems Lakes are fed by underground aquifer or stream Ponds are fed by rainfall and may be seasonal
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Sun can reach bottom
Fed by rainfall May be seasonal Algae and plants
throughout
Microscopic Animals and Algae
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Lakes and Ponds—Abiotic Factors
Littoral zone: nutrient rich area found close to shore
Benthic zone: bottom of the lake where no sunlight can reach.
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Plants are floating algae and plants along shoreline
Animals live in or near water
Lakes and Ponds: Plants and Animals Adaptations
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Threats to lakes and ponds
Are being polluted and degraded by human impact
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Uses: Animal/
plant homes
Carbon “sink”
Water recharge areas, removing pollutants
Types: Brackish and freshwater
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* Very shallow with land occasionally exposed
*Saturated soil
*Low oxygen in water and soil
*Emergent plants Heron
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Location: Found on flat, poorly drained land, often near streams
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Threats to Wetlands
Clearing for farmland or development has been a concern.
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Rivers
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River: Plant and Animal Adaptations
Will vary based on where in the river is located and how it flows.
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Threats to Rivers
Industry uses water to dispose of waste products
Runoff from homes and other places causes changes in acidity, pollution, etc.
Dams alter the flow of the water
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Close to equator Consistent water temperature Shallow water Low in Nutrients
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Breeding area for many fish
Animal adaptations of the Coral Reef
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Threats to the Coral Reefs
Temperature is important, too hot or too cold and the animals can not survive.
Human intrusion (scuba diving) is damaging if you touch/step on the reef
Pollution is also a concern.
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Ocean Abiotic factors
Open ocean is one of the least productive areas on earth, too little sunlight to support plant growth
Covers nearly ¾ of the Earth’s surface.
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Ocean Plant adaptations
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Ocean Animal Adaptations
Zooplankton—sea’s smallest herbivores
Deep ocean animals feed on detritus—floating debris in the water column.
Hammerhead
Lion fish
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Threats to the Oceans
Oceans, are becoming more polluted
Overfishing and some fishing methods are destroying fishing grounds.