Topic:
Succession/ Symbiosis
Questions/Main Ideas:
What is succession?
What is the difference
between Primary and
Secondary Succession?
Name: ____________________________
Date:_________________________
Objective: SWBAT understand the growth and decline of a population.
Succession= Orderly, natural changes that take place in the communities of an
ecosystem over time
- Community of organisms inhabiting an area gradually change
- Pioneer species= the first species to inhabit an area
• Ex) lichens, grasses
- Climax community= stable mature community that undergoes little or no
succession
• Ex) Deciduous forest in Virginia
1. Primary Succession
- Colonization by communities of organisms where no soil exists
- Ex) Volcano
2. Secondary Succession
- When a community is disrupted by natural disaster or human actions
- Takes less time to reach climax community than primary
- Ex) Forest fire in 1988 in Yellowstone National Park
What is symbiosis?
Symbiosis= A close relationship between two different species.
What are examples of
symbiosis?
1. Mutualism= A relationship were both organisms benefit (+/+)
- Example: coral and algae (zooxanthallae)
- Co evolution= A relationship where both organisms depend on each other to
survive. Example: bees and the flowers they pollinate
2. Commensalism= A relationship where one organism benefits and the other one
neither benefits or is harmed (doesn’t care) (+/ 0)
- Example: shark and remora
3. Parasitism= A relationship where one benefits and the other is harmed. (+/-)
- Parasite= an organism that lives on or in an organism of another species, known
as the host, from which it obtains nutrients.
- Example: tomato hornworm and wasp
What is matter?
Cycles of Matter- Matter cycles, but energy flows in one direction.
How is water cycled?
1.
Water Cycle- shows the movement of water through the atmosphere, land and
oceans.
How is Carbon cycled?
2. Carbon cycle- shows the movement of carbon between the environment and living
things. All living things contain carbon (organic). Label the carbon cycle.
How is Nitrogen cycled?
3. Nitrogen Cycle- shows the movement of nitrogen between the environment and
living things.
- Genetic material (DNA) has nitrogen in it (the nitrogen bases: A-T, C-G).
- 78% of the Earth’s atmosphere is nitrogen, so the nitrogen that is used by
organisms is only a very small percentage of the total nitrogen available.
Summary: