3. Biomes of the World
1. The Tundra
1. Extremely cold climate
2. Low biotic diversity
3. Simple vegetation structure
4. Permafrost limited drainage
5. Short growing season
6. Energy and nutrients in the form
of dead organic material
7. Large population oscillations
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4. Biomes of the World
2. The Taiga
aka: boreal forest
1. Band of coniferous trees located
just south of tundra
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2. Milder climate and more diverse
biota than tundra
3. Forests subject to heavy logging
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pressure.
5. Biomes of the World
3. Temperate Rain
Forest
1. Located on NW coast of No. America
2. Moderate climate and high annual
rainfall
3. Relatively nutrient-poor soils
4. Forests subject to heavy logging
pressure.
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6. Biomes of the World
4. Temperate Deciduous Forest
1. Located in the mid-latitude areas
2. Four distinct seasons
3. Short, cold winters & long, hot, wet
summers
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4. Trees adapted to the winter with a period
of dormancy and thick bark to protect
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them from the cold weather
7. Biomes of the World
5. Grasslands
1. Composed of a rich mix of
grasses and forbs and some of
the world's most fertile soils
2. Semiarid, continental climate
3. Summers tend to be dry
4. Most precipitation falls at start of
growing season
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8. Biomes of the World
6. Chaparral (aka: scrub forest)
1. Composed of drought tolerant trees, shrubs,
and grasses
2. Occur in California, coastal Mediterranean,
and south coast of Australia
3. Plants go dormant during very dry summer
4. Most precipitation falls in winter
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9. Biomes of the World
7. Deserts
1. Arid, with annual rainfall less than 10 in.
2. Plants adapted to conserve water over
long periods (e.g. cacti, sagebrush, and
mesquite) or germinate, develop to
maturity, flower, and produce a new
crop of seeds within a few weeks
following a rain event
3. Animals burrow to escape the heat of the
desert sun
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10. Biomes of the World
8. Savanna
1. Tropical grasslands
2. Tropical climate with alternate
wet and dry seasons
3. Characterized by a continuous
cover of perennial grasses
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11. Biomes of the World
9. Tropical Rain Forests
1. Earth's most complex biome in terms
of structure and species diversity
2. Climate characterized by abundant
precipitation and year round warmth
3. Trees vertically stratification into
three distinct layers
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15. Aquatic Ecosystems
Environmental Factors
Salinity
The Black Sea
16 PPT
Baltic Sea
5-15 PPT
Lake Michigan 0.5 PPT
The Dead Sea
332 PPT
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Pacific Ocean
36 PPT
The Red Sea & The Persian Gulf
40 PPT
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19. Aquatic Ecosystems
Human Impacts
Waterways across the United States are
contaminated by a medicine chest of antibiotics,
hormones, caffeine, painkillers and other drugs
Agricultural runoff can carry fertilizers, including
traces of antibiotics and hormones, into waterways
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