Chapter 15 Flashcards

(9 cards)

1
Q

What is an ecosystem ?

A

The interaction of a community of living organisms with the abiotic parts of the environment

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2
Q

What is interdependence ?

A

The dependance of two or more features in an environment

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3
Q

What is a stable community ?

A

Where all the species and environmental factors are in balance so population sizes remain fairly constant

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4
Q

What is a community ?

A

All different species that live simultaneously in the same habitat

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5
Q

What do animals and plants compete for in a habitat or community ?

A
Plants:
-light
-space
-water
-mineral ions
Animals:
-food and water
-territory
-mates
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6
Q

What abiotic factors can affect a community ?

A
  • Light intensity
  • Temperature
  • Moisture levels
  • soil pH and mineral content
  • wind intensity and direction
  • Carbon dioxide levels
  • Oxygen levels (aquatic animals)
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7
Q

What biotic factors can affect a community ?

A
  • Availability of food
  • New predators
  • New pathogens
  • one species outcompeting another so the number a re no longer sufficient to breed
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8
Q

What are some adaptations of animals ?

A

Polar Bear:

  • White fur to act as camouflage
  • Thick layers of fat and fur for insulation
  • small surface area to volume ratio to minimise heat loss
  • Greasy coat which sheds water after swimming
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9
Q

What are extremophiles ?

A

Animals that survive and reproduce in the most difficult conditions, many are microorganisms such as archaea

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