Pages

Thursday, April 6, 2017

Annotations ch 9-11

CH9

  • uislands bc gov law that engoarged farmers to deforeest but scientists saw oppurtunity for controlled experiment 
  • fragmwntologist
  • 50 000 000 square miles are ice free
  • half of his land to cropland and pasture cities hopping mals etc
  • 3/5 of remaining is forrest 
  • rest is high mountains tundra or desrt
  • im confused about why anthromes are a better clasification than bioms
  • one road becomes branches of deforestation
  • ring and fling band and release
  • for first year popoulation of birds i deforested raea  join and bigger
  • keeps on dropping (number and variety)
  • bc more mpetition for fewer recorces
  • keps on going down
  • islands tend to be specis poor
  • smaller populations ae morevunerable to hance
  • smaller popultaion means that there is a bigger effect of mall casue s on the population
  • smal populations lead to local extintion
  • also corerates with speciation
  • many species in relsation with army ants
  • the tropics were home to as many as thirty million species of arthropods.
  • much more than number of bird or mammal species
  • very fast species lost due to habitat rduction
  • ther is  lag to the process
  • hard to know but bc populations remain but will eithersurvive or die iff due to chance
  • if we cut the forrests up we wil lose bith flora and fauna
  • arnt enough colonie sof ants to support birds when some go into satatr y phase

No comments:

Post a Comment