Title: Ecology
1Ecology
2Ecology
- Ecology is the study of the interactions among
organisms and their environment
3What is the Biosphere?
- The portion of the earth in which all living
things exist - Only about 20Km of total diameter of earth
- From ocean floor to about 8Km above earths surface
4Two types of factors in Biosphere
- Biotic all things living
- Examples?
- Abiotic all things non-living
- Examples?
5Many subcategories
- Population all individuals of a certain species
within a certain area - Community all the populations of different
species within an area
6Many subcategories
- Ecosystem includes a community and its physical
environment - Includes both biotic and abiotic
7(No Transcript)
8Individuals have a habitat and a niche
- Habitat where an individual organism lives its
home - where is yours?
- Niche the role that organism plays in its
ecosystem - What is yours?
9Relationships between organisms
- Competition if two individuals occupy the same
niche they will compete - Limited resources like?
- Only one will win
10Relationships between organisms
- Symbiosis two organisms living in close
association - Three types mutualism, commensalism and
parasitism
11Relationships between organisms
- Mutualism both species benefit
Example? Why?
12Relationships between organisms
- Commensalism one benefits the other is neither
hurt nor helped
13Relationships between organisms
- Parasitism one species benefits at the others
expense
14All organisms require Energy
- As one organism eats another energy moves through
ecosystem - Forms food chain
- Many food chains make food web
15Food Chain
16Food Web
17Mother Nature Recycles
All essential inorganic nutrients cycle between
biotic and abiotic parts of ecosystem - Water
- Oxygen - Carbon - Phosphorus - Nitrogen
18Water Cycle
19Water Cycle
- Organisms give off water
- Water evaporates into atmosphere
- Water condenses in cloud
- Falls back to earth in rain/snow
- Taken back in by Organisms
20Carbon cycle
21Nitrogen Cycle
22Phosphorous Cycle
23Oxygen Cycle
24Energy Pyramid
25Energy Pyramid
- Producers/Autotrophs make food from sunlight or
other inorganic molecules - examples plants, algae and bacteria
26Energy Pyramid
- Primary consumers eat producers
- Herbivores
- Examples rabbits, plankton
27Energy Pyramid
- Secondary or High order consumers eat primary
consumers carnivores - Larger animals
- Top consumers are not eaten by anyone
28Where do they go then?
- Decomposers bacteria break down dead organisms
and return nutrients (nitrogen) back to the soil
for producers to use
29Biomes
- Large groups of ecosystems all with a similar
climate - Distributed across earth by large shifting blocks
of land called tectonic plates
30Shifting Land
31As land shifts so does sun exposure, temperature
and rainfall
- Explains the different climates in different
biomes