Science 10 Sustainability of Ecosystems. How does society fit into your paradigm and society’s...
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Transcript of Science 10 Sustainability of Ecosystems. How does society fit into your paradigm and society’s...
![Page 1: Science 10 Sustainability of Ecosystems. How does society fit into your paradigm and society’s paradigm? Explain how a paradigm shift can change scientific.](https://reader036.fdocuments.in/reader036/viewer/2022083007/56649e445503460f94b37fef/html5/thumbnails/1.jpg)
Science 10Sustainability of Ecosystems
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How does society fit into your paradigm and society’s paradigm? Explain how a paradigm shift can
change scientific world views in understanding sustainability - explore and develop a concept of sustainability
Communicate questions, ideas, and intentions and receive, interpret, understand, support and respond to the ideas of others with respect to environmental attitudes
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What is a paradigm shift?
A rare and significant change in the way humans view the world
Major changes that are controversial when first proposed but eventually come to be accepted as an advancement in scientific knowledge and understanding
Ex. Earth is round not flat, ocean dumping, using DDT to eliminate insects
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Paradigm Shifts in the Environment Ecosystems represent the relationships
between many species living in an environment and the relationships among those organisms and the non-living parts of their environment
If something is disrupted with one part of an ecosystem, the other parts may feel its effects; sustainability may be compromised
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What is sustainability? The ability to be supported
The quality of not being harmful to the environment or depleting natural resources
Supporting long term ecological balances
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In order to practice sustainability…
We need to understand how everything is connected to each other in the environment
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What do frogs tell us about the environment?
They occupy two different ecosystems Water as tadpoles, land as frogs
They have two different food sources Plants as tadpoles, animals as frogs
Their skin is susceptible to environmental toxins as well as ultraviolet radiation
Acid rain affects their ability to reproduce Global warming and temperature changes
promote diseases that target frogs and alter oxygen levels in water
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The Food Chain Living things may be classified as being
producers, consumers or decomposers Producers are plants, capable of
making their own food Consumers eat other organisms, either
plants (herbivores), animals (carnivores) or both (omnivores)
Decomposers break down dead matter to obtain nutrients
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Remainder of class:
Questions 1-4, page 13
Watch the video on Easter Island
Read the article on Easter Island
Answer the following questions concerning the problems associated with Easter Island.
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Questions for Easter Island
How is it possible that people though this way?
What factors contributed to this mind set?
Are there still large numbers in the general population that think this way?
Why are we shifting to a different paradigm?
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Canada’s Endangered Species When sustainability is threatened, living
things can no longer survive under current conditions
A classification system exists that ranks the risk level of species living in Canada
Page 14, Table 1
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Extinction Humans have the biggest impact on the
livelihood of other organisms Species are going extinct from the
planet at a dramatic rate Extinction is the result of a species
under stress – which can be natural or human-related
Latest projections are now being seen as humans causing extinction 1000x’s faster than normal
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Reasons for Extinction: Loss of habitat Overhunting or commercialization Pollution Disease Disasters Loss of food/prey Increase in predators Environmental catastrophes Climate change Competition from other species
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The Role of Humans Our responsibility to the environment
means that we must try and preserve biodiversity (“bio” = life, “diversity” = variety)
The more variety of organisms that exist on the planet, the more likely of sustainability
The removal of even one species can have major effects on the health of an ecosystem and planet
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Ecology Organisms that humans find undesirable
are called pests Even though we may not think so, all
organisms are important in the web of life
The study of how organisms interact with each other is called ecology
All investigations in ecology begin with a single organism, or living thing
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How Organisms Interact with their Environment Non-living factors that can influence a
living thing are called abiotic factors This includes sunlight, soil, temperature,
etc
Living things that influence or interact with other living things are called biotic factors This includes other plants and/or animals,
including humans
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Levels of Organization One singular living thing belongs to a
particular species All species co-existing in the same habitat
or ecosystem are called a population A collection of populations living in an
ecosystem are referred to as a community
An ecosystem is an area that shares similar abiotic and biotic conditions
Ecosystems can overlap – such as a pond and field; this is called an ecotone
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Not all Ecosystems are Equal Ecosystems that demonstrate
greater biodiversity tend to be less fragile and can sustain stresses
Ex. A bear that can hunt in both a river and forest ecosystem is less likely to run out of food compared to a fish living only in the river