- By
**uri** - Follow User

- 118 Views
- Uploaded on

Population Dynamics. Characteristics of Populations Factors Limiting Populations Human Populations.

Download Presentation
## PowerPoint Slideshow about ' Population Dynamics' - uri

**An Image/Link below is provided (as is) to download presentation**

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

### Population Dynamics

Characteristics of Populations

Factors Limiting Populations

Human Populations

http://filipinofreethinkers.org/wp-content/uploads/2011/12/Philippine-Lugaw-Line.jpg, http://www.pensoft.net/J_FILES/1/articles/2447/export.php_files/ZooKeys-200-001-g007.jpg, http://farm6.staticflickr.com/5191/7238292574_47bdff313f.jpg

http://phycology.mlml.calstate.edu/images/Canopy.jpg, http://bioweb.uwlax.edu/bio203/s2008/bluske_brit/yawning.jpg

Characteristics of Populations

- Geographic distribution or range
- Area inhabited by a population
“The Philippine tarsier (Tarsiussyrichta) is endemic to the southern Philippine islands of Bohol, Samar, Leyte and Mindanao, where it thrives mostly in secondary forests and dense patches or thickets of bush, tall grass and bamboo.”

- Area inhabited by a population

http://www.tarsierfoundation.org/content/the-philippine-tarsier

http://www.unisdr.org/, http://www.nscb.gov.ph/factsheet/pdf08/FS-200806-SS1-01.asp

- Population dispersion
- Patterns of spacing in relation to other members of the population
- Clumped, uniform, random

Concepts and Connections 2002 by Campbell

- Growth rate, r
- change in the number of individuals in a population per unit time

- Factors affecting population size:
- # of births
- # of deaths
- # of individuals leaving/entering
- Immigration = into
- Emigration = exit
# of individuals added to/taken from the population

If r = pop’n growth rate

b = birth rate/natality

d = death rate/mortality

i= rate of immigration

e = rate of emigration

Express r in terms of b, d, i, and e.

r = (b+i) – (d+e)

http://mysite.verizon.net/res15tbbv/sitebuildercontent/sitebuilderpictures/animal-migration.jpg, http://pull.imgfave.netdna-cdn.com/image_cache/1288987440350429.jpeg

- Growth rate, r
- Exponential growth
- Individuals in a population reproduce at a constant rate
- ex. bacterial reproduction: binary fission

- Exponential growth

http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookmito.html

- Growth rate, r
- Exponential growth
- Individuals in a population reproduce at a constant rate

- Exponential growth

- Logistic growth
- Population’s growth slows/stops following a period of exponential growth

steady-state

log

J-curve

S-curve

lag

- Growth rate, r
- Logistic growth
- Biotic potential, rmax
- Max rate at w/c a population could increase under ideal conditions

- Environmental resistance
- Unfavorable conditions that prevent a population from reaching its rmax

- Carrying capacity, K
- Max # of individuals a given environment could support with its limited resources

- Biotic potential, rmax

- Logistic growth

http://www.sustainabilitylabs.org/page/sustainability-five-core-principleshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

Survivorship Curveshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

http://www.kv.k12.in.us/moodle/file.php/26/population_curve.jpg

Factors Limiting Populationshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

- Limiting factor- factor that causes population growth to decrease
- Density-dependent factors
- Becomes limiting only when population reaches a certain level; mostly biotic factors

- Density-independent factors
- Affects all populations in similar ways, regardless of population size; mostly abiotic factors

- Density-dependent factors

http://www.cpsu.org.au/multiattachments/17146/Image/slow-down-sign.jpg

Factors Limiting Populationshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

- Competition
- Crowding and stress
- Human disturbances
- Natural catastrophes
- Parasitism and disease
- Predation

http://thumbs.imagekind.com/member/3f58d983-4020-4101-a3fb-1e3d67c818ac/uploadedartwork/650X650/d6b32ac0-cede-4422-882d-1723572d56f7.jpg, http://reachthetribes.com/200909/big/kaingin.JPG, http://static.guim.co.uk/sys-images/Technology/Pix/pictures/2009/10/21/1256124500714/Mount-Pinatubo-eruption-i-001.jpg, http://s3.hubimg.com/u/593274_f260.jpg

Human Population Growthhttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

- Which model of pop’n growth (exp’l vs. logistic) does the human pop’n follow?
- Human pop’n size has increased through time

- What factors have controlled human pop’n growth through the centuries?
- Centralized agriculture
- Infectious disease
- Industrial, technological revolutions
- Modern medicine

http://www.bbc.co.uk/schools/gcsebitesize/science/images/bihumanpop.gif

Populations in developing vs. industrialized countrieshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

- What does this graph tell us about birth rates in different countries?
- What about death rates?

http://www.bio.miami.edu/dana/pix/agestructure.gifhttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

DemographicsAge structure and Sex-ratio- What do these graphs tell us about birth rates in different countries?
- What about death rates?
- What can age structure diagrams tell us about the population?

- What are the effects of human population growthhttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles?
- What are the effects of different lifestyles?

http://kuro-kuro.org/wp-content/uploads/2010/10/population.jpg

Ecological Footprintshttp://www.sustainabilitylabs.org/page/sustainability-five-core-principles

http://www.myfootprint.org/en/

Download Presentation

Connecting to Server..