Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Populations AQA A2 Biology

No description
by

matthew north

on 6 December 2011

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Populations AQA A2 Biology

POPULATIONS
population =
number of one species living in a given area in a given time
Habitat
A place where an organism lives
Niche
An organisms role in the ecosystem
Abiotic
non living
Biotic
living
Community
all the populations that live in a particular
place at a particular time
Ecosystem
interaction between biotic and abiotic factors
even on humans there are many different niches
take lice for instance separate species of lice occupy
different niches
one on the
and another on
if the same species occupy the same niche then they are in
intraspecific
competition between
is called interspecific
randomly generate
at a number of locations until
you've covered 1% of the area
or you have enough to do a statistical test
transects are useful to measure
changing ecosystems
Mark release recapture
number in first sample
number in second sample
divided by marked in second sample
leave enough
between samples
and don't
to make them stand out to predator or prey
predator
prey
prey numbers increase, increasing
this reduces prey numbers, reducing
Human Population
Birth rate =
no. of births per
100,000 of the
population
Death rate
no. of deaths per
100,000 of the
population
immigration =
emigration
stable
stable
growing
decreasing
Topography = the study of the surface features and shape of the earth
Full transcript