How do abiotic factors affect the distribution of organisms?

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1 How do abiotic factors affect the distribution of organisms?

2 Why aren t Kangaroos in N. America? Factors affecting the distribution of organisms can be divided in to biotic and abiotic categories. Biotic (living)- all the living components/ organisms of an individuals environment. Abiotic (non-living, chemical, physical)- temperature, light, water, nutrients

3 What are the biotic and abiotic factors in this ecosystem?

4 How are biomes determined? Precipitation Vegetation Temperature Latitude Flora Fauna CLIMATE

5 What is climate? In essence, it is the average of a geographic location s weather. It includes temperature, precipitation, flora, and fauna

6 Each biome is determined by latitude, precipitation, temperature, vegetation, climate, geographic location, etc. The variation in biomes supports the diversity of organisms in the biosphere. What are the major terrestrial and aquatic biomes and what organisms do they support?

7 Terrestrial Biomes Tundra Boreal Forest Temperate Forest Temperate woodland Temperate Grassland Desert Tropical Savanna Tropical Forest Tropical Rainforest Mountains Polar Regions

8 Aquatic Biomes Freshwater Ponds and lakes Rivers and streams Wetlands Marine Oceans Coral Reefs Estuaries

9 Biomes Presentations

10 Temperate Forest

11 Location Eastern N. America Eastern Asia Australia Europe Precipitation and Temperature Average precipitation between cm per year Temperature Range

12 Growing Season 5-6 months out of the year

13 Fauna Wide variety of mammals, birds, insects, and reptiles Migration, hibernation, and food storage are adaptations of animals in this biome.

14

15 Flora Variety of plants that inhabit this biome. Oak, maple, spruce, fir, hemlock

16

17 Four distinct seasons: Spring, Summer, Autumn and Winter Deciduous forest provides food and timber for humans. Deciduous forest have been cleared for suburbs, wood, and agriculture. Pollutants have had a large negative affect on the vegetation. Invasive species introduced by humans have also become a problem. (i.e. chestnut blight)

18 Temperate Grassland

19 Location North America South America Asia Africa Australia Precipitation and Temperature Average precipitation is 80-95cm per year Average temperature is between C

20 Growing Season Determined by the how much rain the location gets.

21

22

23 Drought, grazing animals, and fires keep grasslands from becoming forest. Much of the grassland has been cultivated for agricultural use. Known as Steppes in Asia Velds in Africa Rangelands in Australia Pampas in S. America

24 Desert

25 Location Every continent except Europe. Precipitation and Temperature Average rainfall 2-26 cm per year Temperature ranges between -18 C - 49 C Deserts are classified by the amount of rainfall that they receive.

26 Fauna

27 Flora

28 Deserts are found in over 60 of the world s nations Because deserts are too dry for many wooddecaying fungi to exist, termites play a crucial ecological role by eating, breaking down, and recycling cellulose. Without termites, the entire desert ecosystem would collapse. Cairo, and Los Angeles are all located in desert biomes.

29 Tropical Seasonal Forest

30 Location Africa Asia Australia South and Central America Precipitation and Temperature Average rainfall > 200cm per year Temperature ranges from C

31 Growing Season Distinct wet and dry season Deciduous trees lose their leaves in the dry season

32 Fauna

33 Flora

34 ~ 4% of Earth s ice-free surface is tropical seasonal forest Almost 50% of that land is used as pasture or crop land. Covers almost the entire country of India

35 Polar Regions

36

37 Locations Earth s poles- Artic and Antarctic regions Precipitation and Temperature Antarctica is considered a desert because it receives so little precipitation. The arctic receives moderate precipitation lowest reliably measured temperature on Earth of 89.2 C highest temperature ever recorded in Antarctica was 14.6 C Arctic -50* C 10* C

38 Fauna

39 Flora

40 24 hours of sunlight during the summer time 24 hours of darkness during the winter time Antarctica is considered a desert because it receives so little rainfall. ~ 90% of Earth s ice is contained on the continent Human habitation is limited to scientific research centers

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