Textbook Notes (368,389)
Canada (161,858)
Biology (653)
BIO205H5 (48)
Chapter 9

Ch.9 Properties of populations

2 Pages
140 Views
Unlock Document

Department
Biology
Course
BIO205H5
Professor
Christoph Richter
Semester
Fall

Description
Propertiesof Populations October-12-11 8:53 AM 9.1 Organisms may be unitary or modular • Modular organisms (someplants, corals, sponges, bryozoans) sends new roots or break off (clones), seemingly to be individuals • Genet is a plant produced by sexual reproduction • Ramets are plants produced asexually (modular) ○ Extends life 9.2 The distribution of a population defines its spatial location • An area that encompassesall individuals of a species, the distributions describes the population's geographic range • Population distribution is influenced by suitable environmentalconditions -> high tolerance allows for widespread geographic range • Geographic barriers such as: mountains, oceans • Individuals are not distributed equally in a geographic range ○ Continental scale: suitability of climate Particular area: microclimates • Local subpopulations are due to environmentalheterogeneity • Metapopulationis a collective of local subpopulations 9.3 Abundance reflects population density and distribution • Abundance ○ Population density ○ Area which the population is distributed • Crude density is number of individuals in an area ○ Howeverindividuals do not cover an area equally • Distribution can be random, uniform, or clump • Uniform distribution came from negative interaction, i.e. competition • Spatial distribution of individuals can be described at multiple spatial scales • Ecological density is the number of individuals per unit of available living space 9.4 Determining density requires sampling • Population size = density * area • Quadrats, used mostly for sessile animals, good for uniform, not clumped • Mark-recapture,used for mobile population ○ 9.5 Populations have age structures • Age structure is the number or proportion
More Less

Related notes for BIO205H5

Log In


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit