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Environmental Science Living Things in Ecosystems

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LaVigne Environmental Science Living Things in Ecosystems Chapter 2 Notes #1 The story of Borneo (in Asia) DDT killed mosquitoes (that carried malaria) DDT also ended ... – PowerPoint PPT presentation

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Title: Environmental Science Living Things in Ecosystems


1
Environmental ScienceLiving Things in Ecosystems
LaVigne
  • Chapter 2
  • Notes 1

2
The story of Borneo (in Asia)
  • DDT killed mosquitoes (that carried malaria)
  • DDT also ended up killing the wasps
  • Effect- thatch roofs collapsed
  • The caterpillars boomed because there were no
    wasps to eat them
  • DDT also ended up on cockroaches
  • Geckos ate the roaches, got nerve damage, got
    slow enough to be killed by house cats
  • The house cats dies of poisoning, allowing the
    rat population to boom

3
The story of Borneo (in Asia)
  • The rats brought fleas, which brought the plague
  • Healthy cats had to be shipped in!

4
Ecosystems Everything is connected
  • Ecosystem- all organisms in a certain area, along
    with their physical environment
  • They are all in the biosphere
  • Ex. Deserts, wetlands, coral reefs, etc)
  • Often considered isolated unit
  • However there are not clear boundaries
  • (things can move from one system to another)

5
Composition of Ecosystems
  • biotic factors living parts of an ecosystem
  • animals
  • plants
  • microorganisms

6
Composition of Ecosystems
  • Abiotic factors nonliving parts of the
    ecosystem
  • Temperature
  • Sunlight
  • Water supply/humidity
  • Soil type/Mineral nutrients

7
In an ecosystem there are
  • communities
  • a group of interacting populations of different
    species
  • Ex. In a forest plants, animals,
    microorganisms, etc
  • Habitat the place where a living thing lives

8
In an ecosystem there are
  • population
  • a group of individuals of the same species living
    in a particular place
  • Ex. All the oak trees in a forest
  • Ex. All white tail deer in Michigan

9
In an ecosystem there are
  • species
  • a group of organisms that can produce fertile
    offspring/share common genes therefore resemble
    each other
  • Ex. People at a gathering
  • Ex. Robins in the forest
  • organism
  • one individual living thing

10
(No Transcript)
11
In an ecosystem there are
  • niche
  • an organisms way of life
  • how it fits into its environment
  • Relationships
  • Reproduction (when, how many)
  • Shelter/actuary, etc
  • Ex. A dog has puppies, barks at strangers, wants
    to get positive attention from his master, gets
    fleas, sleeps at the foot of the bed, eats dog
    food, etc.)

12
In an ecosystem there are
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