Ecology
Download
1 / 18

Ecology - PowerPoint PPT Presentation


  • 156 Views
  • Uploaded on

Ecology. Population Ecology. Clumped-individuals in patches uniform- result of antagonistic(hostile interactions) random- unpredictable spacing. Dispersion. TYPE I - shows low death rates during early and midlife; then the death rate decreases sharply for older groups.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Ecology' - judah


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


Dispersion

Clumped-individuals in patches

uniform- result of antagonistic(hostile interactions)

random- unpredictable spacing

Dispersion


Demography

TYPE I - shows low death rates during early and midlife; then the death rate decreases sharply for older groups.

TYPE II- shows a constant death rate over the organisms life span.

TYPE III- shows very high early death rates early, then a flat rate for the few surviving to older age groups

Demography


Population growth

  • Exponential population growth- then the death rate decreases sharply for older growth under ideal conditions

  • Logistic growth model- per capita rate of increase declines as a carrying capacity is reached

  • Carrying capacity- maximum population size that a certain environment can support at a particular time with no degradation

Exponential equation- dN/dt=r(max)N

Logistic equation- K: dN/dt= r(max)N (K-N)/K

Population Growth


Density independent factors

What is Density independent factors then the death rate decreases sharply for older ?

Examples Of Density independent factors

Weather

Natural disasters

Climate

Pollution

Seasonal cycle (ex.- monsoons, el Niño, La Nina

  • things that are unaffected by population size

  • Damages affect everyone in a population regardless of the size

Density Independent Factors


Density dependent factors

a then the death rate decreases sharply for older death rate that rises as the population density rises and a birth rate that falls as the population density rises

Predation

Competition

Diseases

Density-dependent factors


Community ecology
Community Ecology then the death rate decreases sharply for older


Ecological succession

Primary succession- then the death rate decreases sharply for older plants and animals gradually invade a region that was virtually lifeless where soil has not yet formed

Secondary succession- occurs when an existing community has been cleared by a disturbance that leaves the soil intact.

Ecological Succession


Relationships

Parasitism then the death rate decreases sharply for older - symbolic interaction in which the parasite derives its nourishment from its host. Parasites may have a significant effect on the survival, reproduction, and density of their host.

Mutualism- interspecific interaction in which both species benefit

Commensalism- a process in which one species benefits and the other species is neither harmed or benefited.

Relationships


Keystone species

exert then the death rate decreases sharply for older control on community structure by their important ecological niches.

disappearance would start a domino effect

KEYSTONE SPECIES


Restoration conservation ecology
Restoration then the death rate decreases sharply for older & Conservation Ecology


Flow of energy

Primary Consumers - then the death rate decreases sharply for older herbivores that eat the primary consumers

Secondary Consumers- carnivores that eat the herbivores

Tertiary Consumers- carnivores that eat the secondary consumers

Decomposers( Detritivores)- consumers that get their energy from nonliving organic material

traced through the trophic levels of a food chain and food web

Energy cannot be recycled

Flow of Energy


Primary production

the then the death rate decreases sharply for older amount of light energy converted to chemical energy by autotrophs

is known as the Gross Primary Production(GPP)

GPP

is not the amount of energy available to consumers

Primary Production


Energy

energy then the death rate decreases sharply for older is lost at each level of transfer as heat

3 Types of Ecological Pyramids

a biomass pyramid

an energy pyramid

a pyramid of numbers

Energy


Nitrogen cycle

moves then the death rate decreases sharply for older nitrogen from the atmosphere through the living world

a common limiting factor for plant growth

most of earth's nitrogen is in the form of N2

is unusable by plants

Nitrogen Cycle


Carbon cycle

is a balance between the amount of CO2 removed from ecosystem by photosynthesis and cellular respiration

The burning of fossil fuels adds significant amounts of Co2 to the atmosphere

CO2 effects on global warming

Carbon Cycle


Resources

  • www.biologycorner.com ecosystem by photosynthesis and cellular

  • www.southtexascollege.edu

  • www.laney.edu

  • www.nanotechproject.org

  • www.clas.ufl.edu

Resources


ad