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Chapter 52

Chapter 52: Ecology and the Distribution of Life


Department
Biological Sciences
Course Code
BIOA02H3
Professor
Kamini Persaud
Chapter
52

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Sanchika Kanagalingam
March 31st 2011
Biology II
Chapter 52: Ecology and the
Distribution of Life
What is ecology?
The scientific study of interactions between organisms and their environment
How interactions with the physical environment changes the environment
Community isnt just one specific species
oAll the species
Ecosystem is community in the abiotic ecosystem
How are climates distributed on Earth?
Climate- the average atmospheric conditions over a long-term
Everyday changes on day to day basis- weather
What determines primarily the climate is the amount of sun
oAngle that the light hits the earth
oAmount of earths atmosphere passed through
Higher latitudes receive less solar energy than the equator
Wind patterns, the air tends to fall
oIt picks up a lot of moisture making deserts
oAround 30 degrees north
oWind travels to the equator and the moisture falls out of the air to produce
precipitation (tropics)
oWinds are rising 60 degrees north and 60 degrees south and as they rise they fall
at the poles and you get a lot of moisture and dry areas at the north and south
poles
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Sanchika Kanagalingam
March 31st 2011
Biology II
Travelling over a mountain
oAs the air travels up it releases a lot of water (one side of mountain grassy)
oThe other said the cloud moves down and the moisture is taken away (dry side )
What is a Biome?
Terrestrial environment defined by the growth forms of its plants
Plants directly influences by temperature and precipitation
Seasonal temperature & precipitation patterns
oOrganisms have different activities in each biome
oDifferent growth forms of plants and species richness
Tundra
Any area that is relatively flat
Not a lot of vegetation
Area of permafrost, land that never thaws out
oAlways remains frozed
oNever drains
onot a lot of vegetation
oanimals tend to be migratory (migrate or hibernate)
Boreal Forest
A lot of everygreen
Winters are long and summers are short
Evergreen take advantage of climate due to short summer
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