Biodiversity and Conservation

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Biodiversity and Conservation

• Chapter 5

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Section 1 vocabulary (2)

• extinction,
• biodiversity
•  

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Extinction (116)

• Permanent loss of an entire species of organism
  from the biosphere.

The Baiji white dolphin is one of the most recent
species to fall victim to human civilization.
Native to the Yangtze River in China
A relative of the smaller manatee, the gentle sea
cows were over 25 feet long and may have weighed
as much as 10 tons.
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Biodiversity (116)

• The variety of life in an area that is determined
  by the number of different species in that area.
• Notes increased biodiversity improves the
  stability of an ecosystem and contributes to the
  health of the biosphere!

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• 1. Why is biodiversity important? It maintains a
  healthy biosphere and provides both direct and
  indirect benefits to humans such as food,
  medicines, clothing and shelter!

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Threats to biodiversity

• Extinction happens gradually and is called
  background extinction due to natural events
  climate changes and natural disasters.
• Extinction can also happen more quickly, mass
  extinction, some scientists think we may be in
  the middle of a mass extinction.

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Humans!

• Use of natural resources is altering the
  environment!
• Fossil fuels, plants, soil, clean water, clean
  air, solar energy are all natural resources!
• Over exploitation of organisms by humans can lead
  to extinction.
• Destruction of habitat removal of forest etc.
• Pollution!!!

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• 2. Things that cause organisms to lose their
  habitat, will they increase or decrease
  biodiversity? why?

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Decrease!

• If organisms lose their habitat then the number
  of organisms that can live in the habitat will
  decrease! This will lower the overall number of
  different species thus decrease biodiversity!

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Section 2 vocabulary (5)

• mass extinction,
• natural resource,
• biological magnification,
• introduced species,
• invasive species.

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SC.912.L.17.8

• Recognize the consequences of the losses of
  biodiversity due to catastrophic events, climate
  changes, human activity, and the introduction of
  invasive, non-native species.

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mass extinction (122)

• An event in which a large percentage of all
  living species become extinct.

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natural resource (123)

• All materials found in the biosphere, including
  minerals fossil fuels, nuclear fuels, plants,
  animals, soil, clean water, clean air, and solar
  energy.

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Biological Magnification (126)

• The increasing concentration of toxic substances
  in organisms as trophic levels increase in a food
  chain or food web.
• NotesDDT a pesticide used to kill insects in the
  1940s -1970s is thought to be the cause of the
  near extinction of the bald Eagle. Why are
  amounts increased as you move up the trophic
  levels?

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• Biological Magnification

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Introduced Species (128)

• Non native species that are either intentionally
  or unintentionally transported to a new habitat.
• Notes not a threat to the native habitat.
• Often reproduce at high rates due to not
  predators or competition .
• They become invasive species!

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• 1. What types of things threaten biodiversity?
• Lack of natural resources, over exploitation of
  animals, loss of habitat, destruction,
  deforestation, disruption of the habitat, over
  fishing or hunting, habitat fragmentation,
  pollution, acid rain, eutrophication ( adding
  animal waste or sewage to water ) and introduced
  species becoming invasive!

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• 2. What are two things that can happen in
  aquatic environments that can harm the habitats
  and threaten biodiversity?
• Acid rain
• Eutrophication
• Over fishing
• Invasive species

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• 3. With biological magnification, what level
  organism is most affected? The apex or top
  predator! Because it has to eat or consume the
  most!

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• 4. Introduction of a non-native species into a
  habitat can do what? Threaten biodiversity!
• Cause problems with resources, competition, space
  
• 5. How will biodiversity be altered? It will be
  decreased!

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• 6. DDT is an example of a chemical that is
  biologically magnified. What affect did DDT have
  on birds?
• It caused the shells of the eggs to be weak.

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• 7. Describe how national parks protect
  biodiversity.
• Restrict the removal of items from the part.
• Limit the number of guests into the area.

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Section 3 vocabulary (3)

• renewable resource,
• nonrenewable resource,
• sustainable use.

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SC.912.L.17.11

• Evaluate the costs and benefits of renewable and
  non-renewable resources, such as water, energy,
  fossil fuels, wildlife, and forests.

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2 types of resources

• Renewable resources (130) those that are
  replaced faster than they are being used.
• Non-renewable resources (130) those resources
  that are found on Earth in limited amounts or are
  replace by natural processes over extremely long
  periods of time.

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• 1. What are some examples of renewable
  resources.
• Solar
• Plants, animals,
• Clean water
• Clean air

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• 2. What are examples of non renewable resources?
• Fossil fuels
• Mineral deposits
• Radioactive uranium

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• 3. What are the advantages and disadvantages of
  nuclear fuels? Advantages Not much waste and few
  CO2 emissions released, as well as, few other
  greenhouse gases
• disadvantagesHigh cost to build and close down
  power stations.
• Waste is radioactive. Problem with getting rid of
  waste safely
• renewable or not? Not, uranium is not in
  limitless supplies

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SC.912.L.17.20

• Predict the impact of individuals on
  environmental systems and examine how human
  lifestyles affect sustainability.

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Conserving Biodiversity

• Natural Resources.
• 6 billion humans use the biosphere's natural
  resources. Populations continue to grow!

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Sustainable use (130)

• 1. What is sustainable use?
• using resources at a rate at which they can be
  replaced or recycled while preserving the
  long-term environmental health of the biosphere.

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• 2. What are some ways you can practice
  sustainable use?
• Recycle
• Conservation
• Preserving ecosystems
• Using the environment responsibly

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• 3. Why recycle plastic?
• It does not biodegrade! It will remain in the
  environment for a very long time causing harm

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SC.912.L.17.13

• Discuss the need for adequate monitoring of
  environmental parameters when making policy
  decisions

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• 1. Policy regarding the environment must be
  related to how the environment is dealing with
  the processes. Explain what this means using an
  example of hunting policies.
• Hunting season only when there is an abundance
  of animals
• Limit the places and numbers of hunters by
  issuing licenses.

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• 2. Why cant environmental laws be written
  quickly?
• It takes time to observe the impact on the
  environment.

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• 3. Complete the MiniLab on page 77 of the
  textbook

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