3 Blue Marble Photograph What did you observe in this photograph?What do you wonder about?How can 13 million different species of life exist on Earth?What factors determine whether a species lives in North America or Africa?This picture greatly influenced the environmental movement – why might this be so?
4 Ecosystem What is an ecosystem? A part of a biome in which abiotic components interact with biotic componentsAbiotic: non-living components of an environmentEx: sunlight, soil, moisture/precipitation, temperatureBiotic: living components/organisms of an environmentEx: plants, animals, fungi, bacteria
5 Biospherethin layer of air, land and water on or near Earth’s surface in which all living things on Earth existBiosphere: thin layer of air, land and water on or near Earth’s surface in which all living things on Earth ExistThe biosphere consists of biomes. Each biome contains many ecosystems. Each ecosystem contains habitats in which a variety of organisms live.Figure 1.3 pg. 9
6 BiomeBiome: includes large regions that have similar biotic components and abiotic components8 terrestrial biomesTundraBoreal ForestTemperate RainforestDeciduous RainforestGrasslands (Temperate and Tropical)DesertTropical RainforestPolar Ice (Permanent Ice)Biome: includes large regions that have similar biotic components (similar plants, animals) and similar abiotic components (similar rainfall and temperatureScientists can classify biomes in different ways and sometimes slightly different terminolgy is used however we will classify biomes by the types of vegetation
7 Observing Patterns in World Biomes Page 11 – Activity 1-1AWork with lab bench partnerWrite down two patterns you see in the distribution of biomesUse the equator, Tropic of Cancer/Capricorn as reference points in determining distribution patternsCompare with another lab benchIn a paragraph, provide an explanation for each of these three patterns based on your general knowledgeCreate a class list of all the distribution patterns identified – indicate which ones were identified by more than one pair of students – mark the to 3 patterns
8 Distribution of Biomes Temperature and PrecipitationTwo of the most important abiotic factors that influence the characteristic of biomes and the distribution of biomes on EarthTypes of precipitation: rainfall, snow, mist and fogGiant trees you find in the rainforest of BC would not survive in a hot, dry desert biomeNeed environments that are cool and wet
9 Overlap indicates that other factors influence precipitation and temperature such as latitude, elevation and ocean currents
13 Latitude and Temperature At Equator – sun shines down almost directly overheadResults in 12 hours of sunlight every day of the yearResults in little fluctuation in temperatureAt the tropical zone (between the Tropic of Cancer and the Tropic of Capricorn)Close to the equator, therefore receives more direct sunlight than further North or South latitudesHas warmest temperatures
14 Latitude and Temperature Temperate Regions and Polar Zones (North or South of the tropical zone)sun rays are at an angleRays are spread over a greater surface area which results in the rays being less intenseThe further away from the equator, the lower the temperature
15 Latitude and Precipitation At EquatorDirect sunlight heats the moist air which causes it to rise (evaporation)The moist air cools in the upper atmosphere and then falls back to the earth as rain (condensation)Receives the greatest amount of rainfallTropical ZoneSimilar to the equator, the sunlight is mostly direct resulting in lots of rainfall
16 Latitude and Precipitation Polar RegionsLittle moisture can be picked up (evaporate) and carried in cold air so clouds do not readily formLittle precipitationTemperate RegionsCold air masses from the polar regions collide with warm moist air masses from the tropicsResults in seasonal rainfall patterns
17 Exit Slip Which biome(s) do you know the most about? Which biome(s) are you most interested in learning about and why?