succession. succession – is orderly, natural changes that take place in the community of an...
TRANSCRIPT
SuccessionSuccession
•SuccessionSuccession – is orderly, – is orderly, natural changes that take natural changes that take place in the community of an place in the community of an ecosystem.ecosystem.
Types of Succession:Types of Succession:• Primary successionPrimary succession – changes that – changes that
occur on soil that has never occur on soil that has never supported life.supported life.– Lava from volcanoes, glaciers retreatingLava from volcanoes, glaciers retreating
Types of Succession:Types of Succession:
• Secondary successionSecondary succession – changes – changes that occur on soil that has supported that occur on soil that has supported plant life (much faster than primary plant life (much faster than primary succession because soil is already succession because soil is already formed)formed)– Plants coming back after some Plants coming back after some
disturbance such as forest fire or land disturbance such as forest fire or land that has been abandonedthat has been abandoned
• Climax CommunityClimax Community – succession – succession eventually ends up in this stable, eventually ends up in this stable, mature community that undergoes mature community that undergoes little or no changeslittle or no changes– The new trees or plants coming up The new trees or plants coming up
under the old ones are of the same under the old ones are of the same species, old growth forestsspecies, old growth forests
• Pioneer OrganismsPioneer Organisms – first – first organisms to inhabit an ecosystemorganisms to inhabit an ecosystem– usually grasses or lichens on rockusually grasses or lichens on rock
View this video clipView this video clip
•http://vsx.onstreammedia.com/vsx/AFG/search/PBSPlayer?assetId=67319&ccstart=509966&pt=1
Answer on notes sheet:Answer on notes sheet:
• How does the tree falling create How does the tree falling create opportunity for secondary opportunity for secondary succession?succession?
• What would happen here if no trees What would happen here if no trees ever fell down?ever fell down?
Succession todaySuccession today
• Where is succession happening in TX Where is succession happening in TX today?today?
•http://www.theatlantic.com/infocus/2011/04/texas-wildfires/100050/
Mr. D’s backyard successionMr. D’s backyard successionwhat it started out likewhat it started out like
After clearingAfter clearing
After planting bermuda After planting bermuda grassgrass
One year later – April One year later – April 20122012
Recently Cleared & Recently Cleared & HerbicidedHerbicided
Annual grassesAnnual grasses
ShrubsShrubs
TreesTrees
Hackberry tree that grew Hackberry tree that grew from seed in about 5-7 from seed in about 5-7 yearsyears
Just some awesome pics of Just some awesome pics of what I’ve donewhat I’ve done
Halfway completeHalfway complete
Completed StepsCompleted Steps
Old fence = new flower boxOld fence = new flower box
Fire pitFire pit
Fire Pit CompleteFire Pit Complete
At nightAt night