Biomes and Biodiversity ( Chapter 5) Terrestrial biomes Aquatic habitats Biodiversity.
BIOMES
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Transcript of BIOMES
![Page 1: BIOMES](https://reader034.fdocuments.in/reader034/viewer/2022042523/55cf96eb550346d0338ea4ab/html5/thumbnails/1.jpg)
World Biomes
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Biomes
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LIFE IN WATER
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I. Aquatic biomes• 2 types – marine and freshwater.• Stratified vertically – photic zone
(light) and aphotic zone (little light).• Bottom of aquatic is benthos – food is
detritus that falls from above.
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Aquatic• Littoral
• Limnetic
– Profundal Zone– Benthos
– Oligotrophic Lakes– Eutrophic Lakes– Mesotrophic Lakes
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Salt water Cover ~75% of Earth’s surface Contain ~95% of Earth’s liquid water
Four major regions Intertidal (along shoreline) Neritic (from shore to continental shelf, ~200 m deep) Oceanic (deep open water) Benthic (the ocean floor)
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http://www.geo.arizona.edu/Antevs/nats104/00lect17lakeutrophic.jpg
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Freshwater 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 seasonalhttp://mbgnet.mobot.org/fresh/
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• Freshwater – close to shore – littoral zone.
• Open water – limnetic zone.• ALakes classified by nutrients –
1eutrophic – shallow and nutrient-rich.• 2oligotrophic – deeper and nutrient-
poor.
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http://www.spatial.maine.edu/~snoox/images/eutrophic_lake.jpg
Eutrophic lake
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http://kentsimmons.uwinnipeg.ca/16cm05/1116/50-19b-Eutrophic.jpg
Oligotrophic lake
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• B Wetlands – area covered with water; supports plants.
• C Estuaries – area where freshwater meets ocean.
• Intertidal zone – land meets water.• D Coral reefs – dominated by coral.
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Wetlands• Estuaries
• Marshes
• Swamps
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http://www.usbr.gov/dataweb/assets/images/Wetlands.jpg
Wetlands
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http://www.cop.noaa.gov/images/estuaries.jpg
Estuary
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Oceans• Intertidal
• Neritic– Continental Shelf– Coral Reefs
• Pelagic– Abyssal Plains– Mid-Ocean Vents
• Benthic
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http://212.84.179.117/i/Coral%20Reef.jpg
Coral Reef
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• E Oceanic pelagic biome – away from shore.
• Abyssal zone – lowest part of benthos; deep-sea hydrothermal vents help chemoautotrophic organisms.
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http://206.110.20.50/web/schuh/students/jonathan/Monsters/MonstersofthDeep/seaslug.JPG
Abyssal zone
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Riparian• Rivers and Streams
• Flood Plains
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Ponds
• 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.
www.dnr.wi.gov
www.uwsp.edu
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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
All water systems are being polluted and degraded by human impact
www.aquaticbiomes.gov
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Marshhttp://mbgnet.mobot.org/fresh/wetlands/
Uses:
Animal/plant homes
Carbon “sink”
Water recharge areas, removing pollutants
Types: Brackish and freshwater
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Marsh—Plant adaptations
• Very shallow with land occasionally exposed
• Saturated soil • Low oxygen in water
and soil• Emergent plants
http://www.blueplanetbiomes.org/world_biomes.htm
Heron
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Swamp/Bogs
Location: Found on flat, poorly drained land, often near streams
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Swamps/Bogs Abiotic factorsLand soaked because of poor drainageDecay is slow - Soil is acidic
SwampsLarge trees/shrubsAdapted to muddy soils
Bogs - sphagnum moss is dominant
http://mbgnet.mobot.org/fresh/wetlands/
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Threats to Wetlands
Previous backfilling and clearing for farmland or development has been a concern.
www.kathimitchell.com
http://www.ucmp.berkeley.edu/glossary/gloss5/biome/aquatic.html
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RiversAt headwaters, usually cold and
highly oxygenated. As it flows, it will broaden out, warm up and this completely changes the biota you’ll find!
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River: Plant and Animal Adaptations
Will vary based on where in the river they are…at the headwaters, organisms need to hang on!
www.3d-screensaver-downloads.com
www.cs.dartmouth.edu
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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
www.nwk.usace.army.mil
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Estuarieshttp://mbgnet.mobot.org/salt/sandy/
• Fresh and salt water meet
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Plant and Animal Adaptations of Estuaries
Very productive biome because it receives lots of light and nutrients
Often used as nursery for young
www.lookoutnow.com & www.visualparadox.com
Manatee and goose
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Threats to Estuaries
Many ports are found on estuaries—pollution
Human population
www.davenewbould.co.uk
pers-erf.org
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Coral Reefs
• Close to equator• Consistent water temperature• Shallow water• Low in Nutrients
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• Breeding area for many fish
http://mbgnet.mobot.org/salt/coral/
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’t live there to create limestone
Human intrusion (scuba diving) is damaging if you touch/step on the reef
Pollution is also a concern.
www.calacademy.org
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Oceanshttp://mbgnet.mobot.org/salt/sandy/
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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.
http://www.worldbiomes.com/biomes_aquatic.htm
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Plants are micro and macroscopicHave floating plants (kelp shown here)
Ocean Plant adaptations
http://www.calstatela.edu/faculty/eviau/edit557/oceans/norma/onfrm.htm
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Ocean Animal Adaptations
Zooplankton—sea’s smallest herbivores
Deep ocean animals feed on detritus—floating debris in the water column.
http://www.kidzworld.com/site/p1951.htm
Hammerhead
Lion fish
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Threats to the Oceans
While the oceans are vast, they are becoming more polluted
Overfishing and some fishing methods are destroying fishing grounds.
http://www.worldbiomes.com/biomes_aquatic.htm
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LIFE ON LAND
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II. Terrestrial biomes• Defined vertically from the canopy
at top to the permafrost at the bottom.
• A Tropical forest – little light reaches ground because of deep canopy.
• Rainfall determines life in area.
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http://www.cotf.edu/ete/modules/msese/earthsysflr/
Tropical Rainforest
Location: Found near equator…little variation in temperatures. No distinct seasonal changes.
Earth's most complex land biome
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• GeographyEquator = 10 deg.lat.
N/S3 major regions:1.SE Asia2.West africa3.South and Central
America
• Outside the equatorial Band:Central America & Mexico, SE
Brazil, Eastern Madagascar,Southern India, NE Australia
• Climate: Warm and wet yr. round
• Ave T: 25-27 deg.C
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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
http://www.cotf.edu/ete/modules/msese/earthsysfl
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Bougainvillea
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 RainforestPlant adaptations
Bangul Bamboo
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Many symbiotic relationships
Live in different levels of canopy
Wagler’s pit viper
Silvery Gibbon
Slender Lorishttp://www.blueplanetbiomes.org/rnfrst_animal_page.htm
Tropical RainforestAnimal
AdaptationsMany animals are
specialists and require special habitat components to survive
Camouflage is common
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Threats to the Tropical Rainforest
http://www.blueplanetbiomes.org/rnfrst_animal_page.htm
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.
You can help by promoting sustainable use of the rainforests’ products
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• Tropical Rain Forest
– Canopy– Emergents– Epiphytes
– Desertification
Tropical
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http://www.hort.cornell.edu/mudge/bneimark/SC%202.jpg
Tropical Forest In Madagascar
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Temperate ForestDeciduousConiferous
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Temperate Deciduous Forests Location: found in temperate zone
(about 480 North lat) Much of the human population lives in this biome
http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tbdf/tbdf.html
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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
http://www.cotf.edu/ete/modules/msese/earthsysflr/taiga.html
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More diversity in the deciduous forest vs. the coniferous forest due to increased sunlight.Trees adapt to varied climate by becoming dormant in winter
White BirchBirchhttp://www.blueplanetbiomes.org/
deciduous_plant_page.htm
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
http://www.blueplanetbiomes.org/deciduous_animal_page.htm
Temperate Deciduous Forest
Animal Adaptations
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Threats to Temperate Deciduous Forests
http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tbdf/tbdf.html
Many forests are cleared to provide housing for humans.
Careful use of the resource can provide a renewable system if we don’t take too much habitat away.
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http://www.ccet.ua.edu/hhmi/images/Autumn.JPG
Deciduous forestB Temperate deciduous forest – small mammals, leaves fall during autumn
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http://www3.newberry.org/k12maps/module_07/images/coniferous.jpg
Coniferous forestC Coniferous forest – cone-bearing trees, trees have needles.
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Taigaaka Northern Coniferous Forest or Boreal Forest
Location: Found only in Northern Hemisphere
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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
http://www.uwsp.edu/geo/faculty/ritter/geog101/modules/ecosystems_biomes/biomes_northern_forest.html
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Balsam Fir
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 floorhttp://www.inchinapinch.com/hab_pgs/terres/coniferous/plants.htm
Fireweed
Taiga Plant adaptations
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Moose
Adapt for cold winters Burrow, hibernate, warm
coat, insulation, etc.
http://www.inchinapinch.com/hab_pgs/terres/coniferous/animals.htm Great Grey Owl
Animal Adaptations of the Taiga
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Threats to the TaigaMining operations can
irreparably damage this fragile ecosystem.
Pollution left behind can also put animals and plants at risk.
http://www.blueplanetbiomes.org/taiga.htm
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Grasslandshttp://www.blueplanetbiomes.org/grasslands.htm
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http://earthobservatory.nasa.gov/Laboratory/Biome/Images/picgrassland.jpg
GrasslandsPrairie, Savanna, Chaparral, Steppes
E Temperate grassland – seasonal drought, fires prevent tree growth. Most used for farming.
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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
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Tropical SavannaAbiotic Factors
Rainy and dry season 25-150 in/yr precipitation
Fire plays a large role in this ecosystem
http://www.cotf.edu/ete/modules/msese/earthsysflr/savannah.html
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Whistling Thorn
Umbrella Thorn AcaciaTropical Savanna
Plant Adaptations
Grows in TuftsResistance to DroughtMany plants have thorns and
sharp leaves to protect against predation.
http://www.blueplanetbiomes.org/savanna_plant_page.htm
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
http://www.blueplanetbiomes.org/savanna_animal_page.htm
Zebras
Chacma Baboon
Tropical SavannaAnimal Adaptations
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Threats to the Tropical Savanna
http://www.blueplanetbiomes.org/savanna_animal_page.htm
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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SteppeDry, cold, grasslands
Location: Found in Russia and the Ukraine
http://www.blueplanetbiomes.org/steppe.htm
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Steppe Abiotic Factors
www.plasmacy.de
www.wsu.edu
<50 in/year precipitation
Mountains often play a role in climate characteristics
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most abundant are plants called Bunch grasses, fine bladed grasses that grow in clumps to preserve water
Tumbleweed
Sweet Vernal
Plant adaptations of the Steppe
http://www.blueplanetbiomes.org/steppe_plant_page.htm
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Many migrate, hibernate or burrow during extremes in temp and precipitation
http://www.blueplanetbiomes.org/steppe_animal_page.htm
Adaptations of Steppe AnimalsMongolian Gerbil
Saiga Antelope
Gazelle herd
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Threats to the Steppe
Overgrazing…nomadic tribes have started to spend more time in one location,
Infrastructure development (roads, buildings, etc)
Unmanaged hunting and poaching is destroying herds of animals
Corsac fox
Lynx
Milk vetchhttp://www.blueplanetbiomes.org/
steppe.htm
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Prairie and Steppe: Grassland areas
50-75 cm/yr Characteristic high Winds
http://www.blueplanetbiomes.org/steppe.htm
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Sod-forming grasses that won’t dry out or blow away in wind.
Fleabanehttp://www.blueplanetbiomes.org/prairie_plants_page.htm
Buffalo Grass
Prairie Plant Adaptations
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Many adaptations to survive extremes
Prairie dog
Bobcat
http://www.blueplanetbiomes.org/pampas_animal_page.htm
Prairie Animal Adaptations
Geoffrey’s cat
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Chaparral—Abiotic FactorsClimate: hot, dry
summers, mild, wet winters. Slight variations in seasonal temperatures…NICE!
California Chaparral
Mediterranean Chaparral
http://www.blueplanetbiomes.org/world_biomes.htm
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ChaparralLocation: Primarily in
coastal areas with Mediterranean climates. About 300 N and S of the equator.
http://www.blueplanetbiomes.org/chaparral.htm
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Chaparral—Plant Adaptations
Mostly low-lying shrubs and small trees.
Many plants have leathery leaves to resist water loss
Many plant species have oils in leaves to help them resist fire…the fire will take out “weaker” plants that don’t belong.
Blue Oak
Fairy Duster
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Chaparral—Animal Adaptations
Camouflage—to avoid predation
Many animals will change their diet as the season changes.
Puma
Aardwolf
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Threats to the Chaparral
Human development—very desirable climate for humans to live.
Grey Fox
King Protea
Wild Goat
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Desert Ecosystems
Location: Depending on type of desert, you will find them in various locations.
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http://www.plantzafrica.com/vegetation/vegimages/savanna3.jpg
Savanna
D Savanna – scattered trees and grasses. > Fire helps increase diversity.> Has rainy season.
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http://www.cpluhna.nau.edu/images/semiaridgrasslands92rw.jpg
ChaparralF Chaparral – evergreen shrub; long, hot, dry summers with fires.
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• G Deserts – sparse rain, some are cold.• Plants have structures to allow survival
(i.e. water storage, alternative forms of photosynthesis)
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Deserts• 300 Latitudes
• High Deserts
• Arctic and Antarctic
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http://pangea.stanford.edu/~hsiao/desert.jpg
Desert
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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.
Too dry for decay
http://www.cotf.edu/ete/modules/msese/earthsysflr/taiga.html
While there are many types of deserts, they all share one characteristic: They are the driest places on Earth!
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Joshua Tree http://www.blueplanetbiomes.org/desert_plant_page.htm
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 =
less surface area
http://www.blueplanetbiomes.org/desert_animal_page.htm
Javelina
Bob Cat
Armadillo Lizard
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Threats to the DesertResidential development
Off road recreational activities destroy habitat for plants and animals.
Some plants are removed by collectors, endangering the population.
Sonoran Desert
Dry Desert
http://www.blueplanetbiomes.org/world_biomes.htm
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http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tundra/tundra.html
Tundra
Location: Found north of the Arctic Circle
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Polar• Taiga
• Tundra
– Permafrost
• Alpine
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Tundra Abiotic Factors <25 in/year Temp rarely higher than 100C Permafrost layer Short growing season
http://www.cotf.edu/ete/modules/msese/earthsysflr/taiga.html
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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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Perennials
Woody shrubs
http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tundra/tundra.html
Heaths
Examples of Tundra Plants
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Many visitors, migrationFew predatorsLittle Competition
Small earsInsulation, thick
coat
Arctic foxsnowy owl
Grizzly Bear
Tundra Animal Adaptations
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Threats to the TundraOne 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 SaxifragePolar Bear
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http://photojunkie.ca/photoblog/tundra.jpg
Tundra
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• HTundra – permafrost covers ground, low diversity.
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http://www.hesd.k12.ca.us/resource/biomes/Biome%20map.gif
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Arctic vs. Antarctic
ArcticRelatively shallow, lots of nutrients for large variety of animals in food web, People, seals and polar bears found here.
nmml.afsc.noaa.gov
AntarcticPenguins live here—only continent not used by humans (exc. Research)
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Polar EcosystemsCan be considered marine
ecosystems since the base of food chain is phytoplankton
www.defenders.org
www.awi-bremerhaven.de
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Threats to the Polar Ecosystems
Reserves of minerals draw humans to these fragile ecosystems.
The main threat to wildlife has been the increase in tourism—garbage left behind
newt.phys.unsw.edu.au
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Climate Change• Boundary Conditions
• Long-Term Climate Change– Glacial Cycles– Volcanism– Plate Tectonics
• Anthropogenic Factors
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THE END