Succession

September 14

Dispatch: Draw and explain this diagram. Underline key terms.

After you get a stamp, pick up your old lab and a yellow sheet

Ecology Test--FRIDAY

• 45 multiple choice• 3 free response

FRIDAY-turn in notebook-turn in P.O.K

Staple yellow sheet to front of your lab

Stickers for LabsGerarldBernadetteGaryGenesisDalenaCaesarErikaTatianaDanielaSeanNasiaJocelyn

Redos due by September 21. Staple new one to old one

SuccessionThe replacement of one community with another

Glacier Succession

• http://bcs.whfreeman.com/thelifewire/content/chp55/55020.html

Take notes + create a flow chart of events

Primary vs. Secondary Clip

• http://www.geowords.org/ensci/imagesbook/04_03_succession.swf

Primary Succession• A community is established in

a fairly lifeless area• First life forms are usually

bacteria, then lichens• Soil eventually develops, then

plants are established

Example of primary succession

• A retreating glacier leaves a moraine, a soil-laden area where life has the potential to take root.

Secondary Succession

•Occurs in an area where disturbance has occurred, but the soil is intact–After a forest fire–After a hurricane

Example of secondary succession

Are pioneer species r or k

species?

R vs K species

R species-breeding at a young age-a short lifespan-producing many offspring

quickly-small offspring-high mortality rates of

young-nonexistent parental care.

K species-long maturation time-breeding relatively late in life -a long lifespan-producing relatively few

offspring-large newborn offspring-low mortality rates of young,-extensive parental care.

Examples of a K-selected species include elephants, bonobo apes and humans.

Examples of r-selected species include waterfleas, insects, and bacteria.

Make graphs for r vs. k species

Exit Quiz 3

1. Clear table

2. Write in Your Name and Period

3. Only bubble the first 4 numbers of your ID (Mauricio, Thao, and 1 more person’s IDs have been chnaged)

4. Wait until the timer goes off to line up and scan quiz

Exit Quiz #4, put table number

a) Explain the difference between primary and secondary succession.

b) How do r and k species play a part in succession?