do now n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Do Now!! PowerPoint Presentation
Download Presentation
Do Now!!

Loading in 2 Seconds...

play fullscreen
1 / 22

Do Now!! - PowerPoint PPT Presentation


  • 135 Views
  • Uploaded on

Do Now!!. Ladybirds feed on aphids, which suck juice from plants Describe the mode of life of the aphids Describe the mode of life of the ladybirds Why do we need to know about modes of life when studying ecology? Define: Ecosystem and species. DO NOW!!!.

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 'Do Now!!' - harper


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
do now
12 Bio 2010Do Now!!

Ladybirds feed on aphids, which suck juice from plants

  • Describe the mode of life of the aphids
  • Describe the mode of life of the ladybirds

Why do we need to know about modes of life when studying ecology?

Define: Ecosystem and species

do now1
12 Bio 2010DO NOW!!!
  • What are the three types of adaptations??
  • A species is.....
  • List four abiotic factors and three biotic factors?
  • What did the salt bag represent on Jamie?
formal homework to hand in on paper
12 Bio 2010Formal Homework to hand in on paper
  • Kiwi’s are native to NZ. Describe how they are adapted to their environment.
habitat
12 Bio 2010Habitat

Habitat: the physical location where an organism lives

Usually defined in terms of the physical characteristics of the environment

e.g. The habitat of the mussel is the mid tide zone

Ys

what are adaptations
12 Bio 2010What are adaptations?
  • How do you think they fit into ecology?
adaptations
12 Bio 2010Adaptations
  • Inherited characteristics that enable an organism to survive or reproduce more effectively
  • Grouped into three types
    • Structural (morphological) –

- prickles on a gorse bush deter herbivores

    • Behavioural
    • Suckling behaviour of young calves ensure they get a supply of milk
    • Physiological

- Blood of tuna fish quite warm – enables them to swim quickly

demonstration
12 Bio 2010Demonstration
  • Animal adaptations for arctic, desert, and aquatic habitats
  • Take notes on some the adaptations modelled
  • Demo Notes
slide9
12 Bio 2010
  • Tuna and Swordfish. Fish have long been thought to be cold blooded. Tuna and swordfish dive deep into the ocean where the water is very cold. Swordfish are able to raise the temperature of their brains and eyes, which allows faster eye movements when hunting. Tuna are able to warm their entire bodies through a heat exchange mechanism called the retemirabile, which helps keep heat inside the body, and minimizes the loss of heat through the gills. They also have their swimming muscles near the center of their bodies instead of near the surface, which minimises heat loss.
ecological niche
12Bio 2007 Ecological Niche
  • It is the role or way of life in a community. The niche depends upon the mode of life, adaptive features, and the habitat of the organism (ESA)
  • It describes the resources of the habitat and the total collection of adaptations that allow the organism to exploit those resources (BAYLEY)
an example
12 Bio 2010An example!!
  • The niche of the native rat could be described as that of “an omnivorous rodent of high reproductive rate that takes advantage of fluctuating food supplies in the grass or bush which it inhabits on offshore islands of NZ”
  • COPY and highlight mode of life – adaptations, habitat – Homework: Find two ecological niches of NZ plants/animals
slide12
12 Bio 2010
  • Pg. 274 Biozone
  • Pg. 23 Bayley
  • Using these two sources in pairs come up with your own paragraph using diagrams if applicable for the difference between realised niche and fundamental niche!!
fundamental vs realised niche
12 Bio 2010Fundamental vs Realised Niche
  • FUNDAMENTAL NICHE refers to the resources a population could theoretically use if in an ideal situation
  • As a result of direct and indirect interactions with other organisms, species occupy a niche that is narrower than this and to which they are best adapted – termed REALISED NICHE
fundamental vs realised niche1
12 Bio 2010Fundamental vs Realised Niche
  • FUNDAMENTAL NICHE refers to the resources a population could theoretically use if in an ideal situation
  • As a result of direct and indirect interactions with other organisms, species occupy a niche that is narrower than this and to which they are best adapted – termed REALISED NICHE
  • Read pg. 23 Bayley – Copy example in your book and write in your own words a caption regarding fundamental and realised niche
slide15

Rocky shore

12Bio 2007

Big barnacles removed

Normal situation

Small barnacles removed

Rocky shore

Rocky shore

Realised niche

Fundamental niche

niche size thinking exercise put diagram on board
12 Bio 2010Niche Size – thinking exercise – put diagram on board
  • BZ pg 72
  • Notes on file
  • Intraspecific and interspecific competition
ecological equivalents
12 Bio 2010Ecological Equivalents??
  • Organisms with different evolutionary backgrounds but occupy similar niches.
  • e.g. Rabbits, kangaroos, and takahe all grazing herbivores
example of a niche
12 Bio 2010Example of a Niche
  • The native rat: ‘an omnivorous rodent of high reproductive rate that takes advantage of fluctuating food supplies in the grass of busy which it inhabits on offshore islands of NZ”
  • Mode of life, adaptive features, habitat
gauses principle
12 Bio 2010Gauses Principle
  • Watch video and answer questions
  • http://www.5min.com/Video/Interspecific-Competition-Ecological-Niches-151425971
gause s principle competitive exclusion
12 Bio 2010Gause’s Principle – competitive exclusion
  • Background - Paramecium
  • ‘No two species can occupy the same ecological niche in the same period for an indefinite period of time’
  • Example: NZ flax caterpillars
    • Two species found on flax leaves – one chews the edges of the leaves, leaving notches, while the other species rasps at the middle of the leaf blade. These species, although occupying the same habitat (flax leaf) do not have the same ecological niche because their feeding habits differ
competitive exclusion
12Bio 2007 Competitive exclusion
  • Gause’s principle states that no two organisms that have the same requirements for the same limiting resources can survive in the same place
  • That is, no two organisms can occupy the same ecological niche