Niches and Community Interaction

1
Niches and Community Interaction

• Isabelle Liu
• Daniel Liu
• Michael Jiang

2
The Niche
Examples
In this picture, it shows the function of a tree
in our life. for example, the tree takes some
of the CO2 and makes it into O2 while some
carbon is also stored in the soil
Textbook Definition Describes not only what an
organism does, but also how it interacts with
biotic and abiotic factors in the environment

• Online Definition The position or function of an
  organism in a community of plants and animals.

3
Niche (Continued)

• Tolerance

Resources
Definition The ability to survive and reproduce
under certain environmental circumstances
Definition The necessity of life for any animal,
such as nutrients. Examples Mosquitoes need
blood to survive. Otherwise, they die.
Example Mosquitoes
Summer
Winter
4
Niche (Continued)

• Biological aspects of Niche
• Definition The biotic factors it
• requires for survival.
• Example
• Mosquitoes need our blood to survive, so they
  stab us with their needles.

5
Competition

• Happens when organisms attempt to use the same
  limited resources.
• examples food, shelter, mates, etc.
• Two kinds of Competition
• Intraspecific- between two or more species.
• Interspecific- between one kind of species.

6
The Competitive Exclusion Principle

• Also known as Gause's Law of Competitive
  Exclusion
• This principle states Intraspecific Competition
  always ends with a winner and loser, and the
  loser usually dies out. Hence no two species can
  occupy the same niche in the same habitat at one
  time.

7
Mutualism
Interaction between two species in which both of
them benefit.
8

• Parasitism

Interaction between two species in which one of
them benefits and the other is harmed.
9

• Commensalism

Interaction between two species in which one
benefits and the other is not affected.
10
Sources

• http//www.google.com.hk/imgres?qaphidum1hlzh
  -CNnewwindow1safestrictsaNtbmischtbniduI
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  Mw666h513eiWvt6TszzGMaZiAe1uMAXzoom1iact
  hcvpx298vpy248dur4628hovh197hovw256tx1
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  ved1t429,r12,s66biw1220bih673
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  fec44c9bebebd505d3efr2frttCatalog2335443A
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  fects-200-million-worldwidesize1.4KBnameTeam
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  ionWorldwidepparasiteoid12fb178112ff76841d911
  4aef047fecefr2fryfp-t-701ttTeamSequencesGe
  nomeofParasitethatAffects200MillionWorldwid
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• http//en.wikipedia.org/wiki/Symbiosis
• http//en.wikipedia.org/wiki/Mutualism_(biology)
• http//en.wikipedia.org/wiki/Parasitism
• http//en.wikipedia.org/wiki/Commensalism

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More Sources

• http//www.biology-online.org/dictionary/
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• www.biologycorner.com
• Biology Text Book
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