succession trophic levels food webs biomes. series of predictable changes that occur over time in...
TRANSCRIPT
SuccessionTrophic Levels
Food WebsBiomes
Series of predictable changes that occur over time in response to disturbances.
Two types• Primary –Occurs on “new” ground (little/no
soil) Glacier melt Volcanic lava/ash
• Secondary Disturbance over existing soil (ex. old farmland)
Occurs where no ecosystem was before.
On rocks, cliffs Soil building occurs
Soil particle sizes: how they are classified:
Volcano addingnew land to Hawaii
Lichens begin growing
Primary succession can be seen happening on the sidewalks.
If left alone, even NYC would return to a cement filled woodland.
Grasses and other species begin to cover in subsequent years
Grasses and other species begin to cover in subsequent years
Decomposers (bacteria and fungi)
Producers (Plants)
Primary Consumers (Herbivores – eat plants)
Secondary Consumers (Carnivores – eat
herbivores)
Tertiary Consumers(Carnivores – eat
carnivores)
Top two also contain Omnivores (Eat plants and animals)
How the numbers of these type organisms actually compare to each other.
An example of a Food Web
Shows how many organisms are interconnected by different paths.
Food chains are different from food webs.
Chains only show ONE path of energy flow.
Tropical Rain Forest
Tropical Rain Forest Tropical Dry Forest
Tropical Rain Forest Tropical Dry Forest Savannah
Tropical Rain Forest Tropical Dry Forest Savannah Desert
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland Temperate
Woodland/shrubland
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland Temperate
Woodland/shrubland
Temperate Forest
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland Temperate
Woodland/shrubland Temperate Forest NW Coniferous
Forest
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland Temperate
Woodland/shrubland Temperate Forest NW Coniferous Forest Taiga
Tropical Rain Forest Tropical Dry Forest Savannah Desert Grassland Temperate
Woodland/shrubland Temperate Forest NW Coniferous
Forest Taiga Tundra