Class Notes (839,215)
Canada (511,223)
Biology (2,437)
BIOLOGY 1M03 (677)
Ben Evans (167)

april 4,2013.docx- lecture notes inclass

3 Pages

Course Code
Ben Evans

This preview shows page 1. Sign up to view the full 3 pages of the document.
April, 4 , 2013 Disturbance disrupts succession  A community can be disrobed by many ways  Pioneering species, arent doing well on the ground  When a tree falls, it takes down many other trees  Increases biodivestiy , because you opened to pioneerin species can come in , climax species  Other habitats of disburances, natural seelciton shapes to cope with the tragedy  Forest fire has gone thoruhg area, for pic on the right  Habitat is perfect for floren require early succcesional species  Fire sweeps through , lots of lighning storms ,- sandy nature makes it very  Low palm trees have fan like leaves, survive the fire  Wire grass is a type of grass that grows , recovers quickly so grows quickly after the fire  Slash pine lives for longer,have dense needles, fire comes through quickly through this , protect with dense needles, so when it gets big enough it drops the , so fire doesn’t catch on it  Florodo scrub dees  Wind changed direction, and fire was streaming towards head quarter Disrubance ...  African elelpahsn are , can push large trees and open habitats  Can act as a disturbance force in Africa  Efforts have been done to call habitats  Elepahns and climate combined created desertification Sucession after disturbance  After disrbance  Corn field, is a human ditubrance, if you leave it for long enough y, pioneer species wil change moistrure conditions, other plants would move in  Conditions are changing, secondary condition start after a disburance is happend  Climax , tolerance and inhibition and faciltaiton depending on which speces were there you can find out whi Some communities are mosaics of patches at diff stages of succession  Some competive species , around pioneer species that take advantage  Intermediate levels of disurabcen can lead to elevated to biodersity  So can ahve mixtures of pioneering , climax speices, and between Island Biogeography  Islands are imp soruce of biodvierstiy  Lost to extension would  Cutting off gene flow for epciation to occur,  For evolution ot crate new species  Mac Arthur and Wilson established island biogeography theory  How far away from the content o  Every island would have same equilibrium species between incoming flow of new pseices , versus the rate of existence  Imigartion rate balances the existence is where the equilibrium is reached and thats how many species would last on the island Krakatau  Island starts fro mscrathc  Emerged form sea, lost all life after the lava and stuff  Nothing but lava,  Over time, palnts and amians rained ,  Seeds, were borught by storms and stuff, so ioneers early immigrants arrived first  Early groups- are strong dispers like seds  Rate of arrivela of new spe, strong dispersals arrived there early ,birds arrive quickly enchance the rate of immmigartns as the strong dispers arrive and establish  With time, island gets coreded  Competive species outcompete with un comepentive species, and so equilibrium species is established  Equilibrium number of sepcies, not talking about every speices  We don’t know all the species  Look at biggest group vert Isalnd BIogeogrpah  Islands don’t have to be in water  Anything where you have a siuitbale habitat by non-suitable habitat  Close to shore, where there is ltos of speoces on content  Small island , which has little area, far from the contintent  Bigger, but eqully distane  Size of island, if you ahve enough space, can have good population ,so hif a climate disaster hapend, you can have , close to land which increases immigrants, so low rates of extinction  So lots of epceas, to reduce rate of extinction ICLicker---E Because c is too small island, so going to ahve high existence rate and its far enough from the island Great Basim mountain  Not an island around water  Maises, elevated flat land of diff sizes that attract boreal species, because of high altitude  Size of maises, importan
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.