Podcast
Questions and Answers
What is the primary cause of the enhanced greenhouse effect?
What is the primary cause of the enhanced greenhouse effect?
- Solar radiation changes
- Human activities increasing greenhouse gas concentrations (correct)
- Volcanic eruptions releasing carbon dioxide
- Natural fluctuations in the Earth's temperature
What happens to corals when they experience stress due to environmental changes?
What happens to corals when they experience stress due to environmental changes?
- They become more colorful
- They migrate to colder waters
- They expel the algae and undergo bleaching (correct)
- They produce more algae
Which of the following is a consequence of rising atmospheric temperatures?
Which of the following is a consequence of rising atmospheric temperatures?
- Increased biodiversity in aquatic ecosystems
- Improved coral health
- More breeding grounds for mosquitoes (correct)
- Decreased sea levels
How does high atmospheric carbon dioxide affect aquatic ecosystems?
How does high atmospheric carbon dioxide affect aquatic ecosystems?
What is the primary purpose of the Wolbachia-Aedes suppression technology used in Singapore?
What is the primary purpose of the Wolbachia-Aedes suppression technology used in Singapore?
What is coral bleaching and its impact on biodiversity?
What is coral bleaching and its impact on biodiversity?
What is a potential consequence of the loss of forested land for certain animal populations?
What is a potential consequence of the loss of forested land for certain animal populations?
What distinguishes global warming from climate change?
What distinguishes global warming from climate change?
What happens to carbon dioxide during photosynthesis in growing trees?
What happens to carbon dioxide during photosynthesis in growing trees?
What might be a result of melting ice sheets in Greenland and Antarctica?
What might be a result of melting ice sheets in Greenland and Antarctica?
Why is maintaining a large gene pool important in conservation?
Why is maintaining a large gene pool important in conservation?
Which of the following statements is true regarding the significance of tropical plants?
Which of the following statements is true regarding the significance of tropical plants?
How does deforestation contribute to soil erosion?
How does deforestation contribute to soil erosion?
What effect does deforestation have on the water cycle?
What effect does deforestation have on the water cycle?
What is one economic reason for conservation?
What is one economic reason for conservation?
Which of the following gases is primarily responsible for the greenhouse effect?
Which of the following gases is primarily responsible for the greenhouse effect?
How does conservation help in maintaining a balanced ecosystem?
How does conservation help in maintaining a balanced ecosystem?
What happens when trees are cut down and left to rot?
What happens when trees are cut down and left to rot?
What role does scientific research play in conservation efforts?
What role does scientific research play in conservation efforts?
Which of the following is NOT a reason for conservation?
Which of the following is NOT a reason for conservation?
What is one result of desertification caused by deforestation?
What is one result of desertification caused by deforestation?
Which of the following human activities does NOT contribute to increased carbon dioxide levels?
Which of the following human activities does NOT contribute to increased carbon dioxide levels?
Why is it crucial to prevent the extinction of species from an ecological perspective?
Why is it crucial to prevent the extinction of species from an ecological perspective?
What lifestyle changes can be implemented to help conserve resources sustainably?
What lifestyle changes can be implemented to help conserve resources sustainably?
What type of consumers only feed on plants?
What type of consumers only feed on plants?
Which group of organisms breaks down dead matter and returns nutrients to the environment?
Which group of organisms breaks down dead matter and returns nutrients to the environment?
What percentage of carbon dioxide released by human activities is absorbed by oceans?
What percentage of carbon dioxide released by human activities is absorbed by oceans?
What is the starting point of a food chain?
What is the starting point of a food chain?
Which process drives the oceans' role as carbon sinks?
Which process drives the oceans' role as carbon sinks?
How do secondary consumers obtain their energy?
How do secondary consumers obtain their energy?
What is formed from the remains of trees after millions of years?
What is formed from the remains of trees after millions of years?
What characterizes the flow of energy in an ecosystem?
What characterizes the flow of energy in an ecosystem?
How much of Canada's forests are harvested in any given year?
How much of Canada's forests are harvested in any given year?
What is a food web?
What is a food web?
Which of the following statements is true regarding nutrients in the ecosystem?
Which of the following statements is true regarding nutrients in the ecosystem?
What is the primary goal of the Paris Agreement?
What is the primary goal of the Paris Agreement?
Which regions' forests have been studied to understand carbon absorption rates?
Which regions' forests have been studied to understand carbon absorption rates?
Which of the following is NOT a characteristic of decomposers?
Which of the following is NOT a characteristic of decomposers?
By what year should global carbon emissions reach net-zero according to climate goals?
By what year should global carbon emissions reach net-zero according to climate goals?
Which statement is true regarding the Paris Agreement?
Which statement is true regarding the Paris Agreement?
What generally occurs when the number of predators decreases?
What generally occurs when the number of predators decreases?
What does a pyramid of numbers represent?
What does a pyramid of numbers represent?
How is a pyramid of numbers constructed based on the given food chain?
How is a pyramid of numbers constructed based on the given food chain?
What is a limitation of using a pyramid of numbers?
What is a limitation of using a pyramid of numbers?
Which of the following represents the correct placement of trophic levels in ecological pyramids?
Which of the following represents the correct placement of trophic levels in ecological pyramids?
What do pyramids of biomass allow us to compare?
What do pyramids of biomass allow us to compare?
In the context of predator-prey relationships, which statement is true?
In the context of predator-prey relationships, which statement is true?
What can be inferred about the population size of producers compared to that of primary consumers?
What can be inferred about the population size of producers compared to that of primary consumers?
Flashcards
Primary Consumer
Primary Consumer
An organism that only eats plants.
Secondary Consumer
Secondary Consumer
An organism that feeds on primary consumers.
Tertiary Consumer
Tertiary Consumer
An organism that feeds on secondary consumers.
Decomposer
Decomposer
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Food Chain
Food Chain
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Food Web
Food Web
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Non-cyclical Energy Flow
Non-cyclical Energy Flow
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Ecosystem
Ecosystem
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Predator-Prey Relationship
Predator-Prey Relationship
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Pyramid of Numbers
Pyramid of Numbers
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Trophic Levels
Trophic Levels
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Pyramid of Biomass
Pyramid of Biomass
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Pyramid Construction (Numbers)
Pyramid Construction (Numbers)
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Limitations of Pyramids of Numbers
Limitations of Pyramids of Numbers
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Ecological Pyramid
Ecological Pyramid
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Food chain relationship
Food chain relationship
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Ocean Carbon Sink
Ocean Carbon Sink
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Forest Carbon Sink
Forest Carbon Sink
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Carbon Sink
Carbon Sink
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Photosynthesis
Photosynthesis
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Fossil fuel formation
Fossil fuel formation
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Paris Agreement
Paris Agreement
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Deforestation
Deforestation
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Climate Change Mitigation
Climate Change Mitigation
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Greenhouse Effect
Greenhouse Effect
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Global Warming
Global Warming
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Climate Change
Climate Change
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Coral Bleaching
Coral Bleaching
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Biodiversity Loss
Biodiversity Loss
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Wolbachia-Aedes Suppression Technology
Wolbachia-Aedes Suppression Technology
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Ocean Acidification
Ocean Acidification
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Shellfish Thinning
Shellfish Thinning
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Deforestation and CO2
Deforestation and CO2
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How does deforestation cause flooding?
How does deforestation cause flooding?
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What is Desertification?
What is Desertification?
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Fossil Fuel Combustion
Fossil Fuel Combustion
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Plastic Waste Combustion
Plastic Waste Combustion
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How do Greenhouse Gases Work?
How do Greenhouse Gases Work?
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Carbon Dioxide Pollution
Carbon Dioxide Pollution
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Conservation
Conservation
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Biodiversity
Biodiversity
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Genetic Diversity
Genetic Diversity
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Sustainable Management
Sustainable Management
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Why Conserve?
Why Conserve?
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Medicinal Plants
Medicinal Plants
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Impact of Conservation
Impact of Conservation
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Study Notes
Organisms and Their Environment
- Ants are a common sight, but their significance is substantial. A world without ants would have fewer insect infestations and a reduced use of insecticides.
- Ants play critical roles in the environment
- Removing ants would affect other organisms and potentially human lives, potentially increasing risk of starvation.
- Ecosystems are comprised of producers, consumers, and decomposers.
- Producers such as plants and algae make their own food via photosynthesis.
- Consumers eat other organisms for energy. They are categorized as primary, secondary, or tertiary based on their feeding level.
- Decomposers break down dead organisms, returning nutrients to the environment.
- Energy flows through an ecosystem through feeding relationships, but is not cyclical.
- Energy is lost at each trophic level, meaning less energy is available for organisms as the food chain goes from bottom to top.
- A shorter food chain is more energy efficient because less energy is lost.
- A food web is a network of interconnected food chains.
- A population is a group of the same species living in a habitat.
- A community is the total of all populations of different species living and interacting in a habitat.
- An ecosystem is a community of organisms interacting with the non-living environment.
- Food chains show the energy and nutrient transfer from a producer through consumers, and end with a decomposer.
- Trophic levels are the positions occupied by organisms in a food chain, generally no more than 4 levels.
- Pyramids of numbers show the number of organisms at each trophic level.
- Pyramids of biomass show the mass of organisms at each trophic level. A biomass pyramid can be inverted.
- Energy is not recycled in the ecosystem, it is transferred.
- The sun is the main energy source for all biological systems.
- Photosynthesis converts carbon dioxide and water into glucose (food) which plants use, and oxygen is released in the process.
Nutrient Recycling
- A carbon cycle is a process where carbon is constantly being released and removed from the environment in the form of carbon dioxide.
- Photosynthesis removes carbon dioxide from the atmosphere, while respiration returns it.
- Decomposition returns carbon dioxide to the atmosphere.
- Fossil fuels release carbon dioxide when burned.
- Oceans are a significant carbon sink that absorb a higher amount of carbon dioxide from the atmosphere than they release.
- Forests are also carbon sinks, storing carbon in trees.
Human Impacts
- Human activities are a significant factor disrupting the natural cycles of the ecosystem, and upsetting the balance.
- Deforestation affects the carbon cycle by depleting the number of trees which would sequester carbon dioxide from the atmosphere.
- Burning fossil fuels releases carbon dioxide into the atmosphere.
- Pollution, such as sewage, can cause eutrophication in aquatic ecosystems and the depletion of dissolved oxygen.
- Insecticides can accumulate in living organisms, biomagnifying in the food chain.
- Deforestation contributes to global warming.
Conservation
- Biodiversity is important because of the many different species contained in a given ecosystem, and are vital for maintaining a healthy ecosystem.
- Conservation is needed to protect and preserve natural resources in the environment.
- Maintaining biodiversity is important for maintaining the balance of ecosystems, human uses of natural resources (e.g., food, materials, medicine).
- Some countries have programmes (e.g., mangrove restoration projects, reforestation efforts) to conserve their resources.
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