succession september 14. dispatch: draw and explain this diagram. underline key terms. after you get...
TRANSCRIPT
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?