Presentation on theme: "World Biomes Follow along with your note packet to add notes as you watch the power point presentation."— Presentation transcript:
1World BiomesFollow along with your note packet to add notes as you watch the power point presentation.
2Earth's most complex land biome Tropical RainforestLocation: Found near equator…little variation in temperatures. No distinct seasonal changes.Earth's most complex land biome
3Tropical 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 topsoilAbout 100 in/yr of rainfall
4Tropical Rainforest Plant adaptations BougainvilleaTropical RainforestPlant adaptationsSunlight is a major limiting factorPlants grow in layers (canopy receives most light)Shallow, wide roots since soil is so thin and poor in nutrientsLittle sun reaches the floorBangul Bamboo
5Tropical Rainforest Animal Adaptations Silvery Gibbon Many animals are specialists and require special habitat components to surviveCamouflage is commonWagler’s pit viperMany symbiotic relationshipsLive in different levels of canopySlender Loris
6Threats to the Tropical Rainforest 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
7Temperate Deciduous Forests Temperate Deciduous ForestsLocation:found in temperate zone(about 480 North latitude)Much of the human population lives in this biome
8Temperate Deciduous Forests Characterized by 4 seasons Temperate Deciduous ForestsAbiotic FactorsCharacterized by an abundance of deciduous (leaf bearing) treesCharacterized by 4 seasonsSoils: Deep soil layers, rich in nutrientsPrecipitation: 30–100 in/yr in all forms (snow, rain, hail, fog, etc.)
9Temperate Deciduous forest Plant adaptations Lady FernTemperate Deciduous forest Plant adaptationsMore diversity in the deciduous forest vs. the coniferous forest due to increased sunlight. Trees adapt to varied climate by becoming dormant in winterWhite BirchBirchhttp://www.blueplanetbiomes.org/deciduous_plant_page.htmDeciduous forests grow in layersMore sunlight reaches the ground compared to a rainforest so you will find more ground dwelling plants.Geulder Rose
10Temperate Deciduous Forest Animal Adaptations Bald EagleTemperate Deciduous Forest Animal AdaptationsAdapt to many seasonsLose Winter CoatEat from different layers of the forestLeast WeaselFat Dormouse
11Threats to Temperate Deciduous Forests 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.
12Taiga aka Northern Coniferous Forest or Boreal Forest Location: Found only in Northern Hemisphere
13Taiga Abiotic factors Winters are long and cold Averages 100 in/yr precipitation—mostly snowSoil poor in nutrients and very acidicGrowing season is very shortecosystems_biomes/biomes_northern_forest.html
14Taiga Plant adaptations Balsam FirFireweedConiferous (needle-bearing) trees are abundantRoots long to anchor treesNeedles long, thin and waxyLow sunlight and poor soil keeps plants from growing on forest floor
15Animal Adaptations of the Taiga MooseAnimal Adaptations of the TaigaAdapt for cold wintersBurrow, hibernate, warm coat, insulation, etc.Great Grey Owl
16Threats to the TaigaMining operations can irreparably damage this fragile ecosystem.Pollution left behind can also put animals and plants at risk.
18Savannas (Tropical Grasslands) Contain the greatest number of grazing animals on Earth.Location: Found in the tropics…near equatorAmount of precipitation supports tall grasses but only occasional trees.The word savanna stems from an Amerind term for plains
19Tropical Savanna Abiotic Factors Rainy and dry seasonin/yr precipitationFire plays a large role in this ecosystem
20Tropical Savanna Plant Adaptations Whistling ThornTropical Savanna Plant AdaptationsUmbrella Thorn AcaciaGrows in TuftsResistance to DroughtMany plants have thorns and sharp leaves to protect against predation.Kangaroos PawsBaobab
21Tropical Savanna Animal Adaptations Chacma BaboonTropical Savanna Animal AdaptationsZebrasReproduce during rainy season—ensures more young surviveAdapt for short rainy season—migrate as necessary Limited food leads to vertical feeding
22Threats to the Tropical Savanna Invasive speciesChanges in fire managementElephantBecause of their low elevation, some savannas are threatened by minor rises in sea level associated with global climate changeKoala
23Steppe Dry, cold, grasslands Location: Found in Russia and the Ukraine
24Steppe Abiotic Factors <50 in/year precipitationMountains often play a role in climate characteristics
25Plant adaptations of the Steppe The most abundant are plants called Bunch grasses, fine bladed grasses that grow in clumps to preserve water.TumbleweedSweet Vernal
26Adaptations of Steppe Animals Mongolian GerbilMany migrate, hibernate or burrow during extremes in temperature and precipitationSaiga AntelopeGazelle herd
27Threats to the SteppeOvergrazing…nomadic tribes have started to spend more time in one location,Infrastructure development (roads, buildings, etc)Unmanaged hunting and poaching is destroying herds of animalsLynxCorsac foxMilk vetch
28Prairie and Steppe: Grassland areas 50-75 cm/yr Prairie and Steppe:Grassland areas50-75 cm/yrCharacteristic high winds
29Sod-forming grasses that won’t dry out or blow away in wind. Prairie Plant AdaptationsSod-forming grasses that won’t dry out or blow away in wind.FleabaneBuffalo Grass
30Many adaptations to survive extremes Prairie Animal AdaptationsMany adaptations to survive extremesBobcatGeoffrey’s catPrairie dog
31Desert EcosystemsLocation: Depend-ing on type of desert, you will find them in various locations.
32Desert Abiotic factors <10 in/yr of rainLittle to no topsoil due to high winds.Minerals not deep in soilToo dry for decayUsually very hot days and very cold nightsWhile there are many types of deserts, they all share one characteristic: They are the driest places on Earth!
34Desert Animal Adaptations: Get water from food Thick outer coat Bob CatDesert Animal Adaptations:Get water from foodThick outer coatBurrow during dayLarge earsOften are nocturnalSmaller animals =less surface areaArmadillo LizardJavelina
35Threats to the Desert Residential development Threats to the DesertResidential developmentOff road recreational activities destroy habitat for plants and animals.Some plants are removed by collectors, endangering the population.Dry DesertSonoran Desert
36Tundra Location: Found north of the Arctic Circle
37Tundra Abiotic Factors <25 in/yearTemperature rarely higher than 100CPermafrost layerShort growing season
38Tundra Plant Adaptations Reindeer lichenTundra Plant AdaptationsGrowing close to the groundHaving shallow roots to absorb the limited water resources.Trees grow less than 1 m high!cottongrass
39Perennials Woody shrubs Heaths Examples of Tundra Plants
40Tundra Animal Adaptations snowy owlArctic fox-Small ears -Insulation, thick coatTundra Animal AdaptationsMany visitors, migration Few predators Little CompetitionGrizzly Bear
41Threats to the Tundra One of the most fragile biomes on the planet Tufted SaxifragePolar BearOil drilling is proposed in Alaska and other areas!The tundra is slow to recover from damage.