Podcast
Questions and Answers
What does the term 'density-dependent' refer to in population dynamics?
What does the term 'density-dependent' refer to in population dynamics?
- Factors that lead to population growth without limits
- Factors that have an increasing effect as population size increases (correct)
- Factors that affect a population regardless of its size
- Factors that are only applicable to specific species
Which growth model is characterized by a population increasing rapidly until it reaches carrying capacity?
Which growth model is characterized by a population increasing rapidly until it reaches carrying capacity?
- Exponential
- Linear
- Logistic (correct)
- Cyclical
What is the main consequence of a sudden natural disaster on a population?
What is the main consequence of a sudden natural disaster on a population?
- It will always decrease the population below carrying capacity
- It leads to permanent extinction of species
- It increases biodiversity within the habitat
- It serves as a density-independent limiting factor (correct)
What effect can a declining human birth rate over time indicate for future population dynamics?
What effect can a declining human birth rate over time indicate for future population dynamics?
What does carrying capacity represent in an ecological context?
What does carrying capacity represent in an ecological context?
How do age pyramids contribute to understanding a population's needs?
How do age pyramids contribute to understanding a population's needs?
Which of the following best describes exponential growth in bacteria populations?
Which of the following best describes exponential growth in bacteria populations?
Which of the following options represents a common misunderstanding about logistic growth models?
Which of the following options represents a common misunderstanding about logistic growth models?
What defines a community in ecology?
What defines a community in ecology?
Which option describes an ecosystem accurately?
Which option describes an ecosystem accurately?
In a food chain where a wolf eats a rabbit that eats grass, what role does the wolf play?
In a food chain where a wolf eats a rabbit that eats grass, what role does the wolf play?
In the same food chain, what role does the grass play?
In the same food chain, what role does the grass play?
What distinguishes the flow of energy from the flow of nutrients in ecosystems?
What distinguishes the flow of energy from the flow of nutrients in ecosystems?
What term correctly categorizes abiotic factors?
What term correctly categorizes abiotic factors?
What concept is essential for understanding the interaction of populations in a community?
What concept is essential for understanding the interaction of populations in a community?
What is the primary role of detritivores in an ecosystem?
What is the primary role of detritivores in an ecosystem?
What is the estimate of land and water required to sustain one person called?
What is the estimate of land and water required to sustain one person called?
Which category describes a species that is at risk of extinction in the near future?
Which category describes a species that is at risk of extinction in the near future?
What term refers to the responsible management of Earth's resources indefinitely?
What term refers to the responsible management of Earth's resources indefinitely?
Using plants to naturally remove toxins from contaminated soil is known as what?
Using plants to naturally remove toxins from contaminated soil is known as what?
Which greenhouse gas is primarily responsible for global warming?
Which greenhouse gas is primarily responsible for global warming?
How do increased levels of greenhouse gases affect global temperatures?
How do increased levels of greenhouse gases affect global temperatures?
Why is 'eating down the food chain' considered more energy-efficient?
Why is 'eating down the food chain' considered more energy-efficient?
Which term best describes species that are not currently endangered but may become so?
Which term best describes species that are not currently endangered but may become so?
How much grassland is needed to support a maximum of ten cheetahs optimally?
How much grassland is needed to support a maximum of ten cheetahs optimally?
What is the primary source of energy that powers most ecosystems on Earth?
What is the primary source of energy that powers most ecosystems on Earth?
How does most carbon enter the living portion of an ecosystem?
How does most carbon enter the living portion of an ecosystem?
How does the removal of a wetland impact the flooding risk in a nearby city?
How does the removal of a wetland impact the flooding risk in a nearby city?
Where is a coral reef most likely to be located?
Where is a coral reef most likely to be located?
In what way does nitrogen primarily enter the living portion of an ecosystem?
In what way does nitrogen primarily enter the living portion of an ecosystem?
What primary factor defines aquatic biomes?
What primary factor defines aquatic biomes?
What is the relationship between gazelles and cheetahs in terms of ecosystem dynamics?
What is the relationship between gazelles and cheetahs in terms of ecosystem dynamics?
Why are freshwater biomes considered important despite covering less than 1% of the Earth's surface?
Why are freshwater biomes considered important despite covering less than 1% of the Earth's surface?
If each gazelle needs an acre of grassland, how many acres are required to support one cheetah?
If each gazelle needs an acre of grassland, how many acres are required to support one cheetah?
What is the accurate statement about aquatic biomes?
What is the accurate statement about aquatic biomes?
What is the primary role of grass in the ecosystem described?
What is the primary role of grass in the ecosystem described?
In a national park, if it's known that it takes one acre of grassland to feed one gazelle, and ten gazelles are needed to sustain one cheetah, how much grassland would be needed to support ten cheetahs?
In a national park, if it's known that it takes one acre of grassland to feed one gazelle, and ten gazelles are needed to sustain one cheetah, how much grassland would be needed to support ten cheetahs?
What is the expected ecological impact of doubling the cheetah population without increasing the grassland area?
What is the expected ecological impact of doubling the cheetah population without increasing the grassland area?
When do wetlands cease to function as a biome?
When do wetlands cease to function as a biome?
Which of these statements about aquatic biomes is incorrect?
Which of these statements about aquatic biomes is incorrect?
What role do seasonal floods play in certain ecosystems?
What role do seasonal floods play in certain ecosystems?
Why might nonnative species quickly dominate when introduced to new environments?
Why might nonnative species quickly dominate when introduced to new environments?
In a stable population of elephants and rabbits at carrying capacity, what will be true about their offspring?
In a stable population of elephants and rabbits at carrying capacity, what will be true about their offspring?
What is a potential consequence of fragmenting a species' range with infrastructure?
What is a potential consequence of fragmenting a species' range with infrastructure?
What is a common misconception regarding disturbances like fires and floods in ecosystems?
What is a common misconception regarding disturbances like fires and floods in ecosystems?
In considering a compromise for road projects in habitats of certain species, what should be prioritized?
In considering a compromise for road projects in habitats of certain species, what should be prioritized?
What characteristic typically enables rabbits to reproduce more rapidly than elephants?
What characteristic typically enables rabbits to reproduce more rapidly than elephants?
How can seasonal fires benefit certain ecosystems?
How can seasonal fires benefit certain ecosystems?
Ecology is primarily concerned with which of the following aspects?
Ecology is primarily concerned with which of the following aspects?
Which approach is NOT typically used in the study of ecology?
Which approach is NOT typically used in the study of ecology?
What best distinguishes environmentalism from ecology?
What best distinguishes environmentalism from ecology?
Which of the following definitions accurately describes a population in an ecological context?
Which of the following definitions accurately describes a population in an ecological context?
Which of the following is NOT an example of an ecosystem service provided by the environment?
Which of the following is NOT an example of an ecosystem service provided by the environment?
Which must be true for ecology and environmentalism to be considered equivalent?
Which must be true for ecology and environmentalism to be considered equivalent?
Why is it misleading to say that environmentalism and ecology are the same?
Why is it misleading to say that environmentalism and ecology are the same?
Which of the following does NOT fall under the scope of ecological study?
Which of the following does NOT fall under the scope of ecological study?
What will likely happen to a nearby city as a result of removing a wetland?
What will likely happen to a nearby city as a result of removing a wetland?
Which characteristic primarily defines the aquatics of a biome?
Which characteristic primarily defines the aquatics of a biome?
In which environment would a coral reef most likely thrive?
In which environment would a coral reef most likely thrive?
What is one significant reason for the importance of freshwater biomes?
What is one significant reason for the importance of freshwater biomes?
How much grassland is required to sustain ten cheetahs based on their diet?
How much grassland is required to sustain ten cheetahs based on their diet?
What would be a potential ecological consequence of eliminating wetlands?
What would be a potential ecological consequence of eliminating wetlands?
Which statement regarding aquatic biomes is accurate?
Which statement regarding aquatic biomes is accurate?
What could be an indirect benefit of wetlands to nearby cities?
What could be an indirect benefit of wetlands to nearby cities?
Which type of relationship is formed when plants provide nutrients for pollinators, who in turn help in the reproduction of plants?
Which type of relationship is formed when plants provide nutrients for pollinators, who in turn help in the reproduction of plants?
What type of relationship exists between cheetahs and Thompson gazelles?
What type of relationship exists between cheetahs and Thompson gazelles?
What principle suggests that two species competing for identical resources cannot coexist permanently?
What principle suggests that two species competing for identical resources cannot coexist permanently?
What ecological concept explains the accumulation of toxins in the bodies of top organisms in a food chain?
What ecological concept explains the accumulation of toxins in the bodies of top organisms in a food chain?
Which organism is classified as a primary producer in an aquatic ecosystem?
Which organism is classified as a primary producer in an aquatic ecosystem?
Primary consumers in an ecosystem primarily consume which of the following?
Primary consumers in an ecosystem primarily consume which of the following?
In a mutualistic relationship, which participant benefits most from the interaction?
In a mutualistic relationship, which participant benefits most from the interaction?
What do we call the relationship where a bird removes ticks from a rhinoceros, benefiting the rhino without harming itself?
What do we call the relationship where a bird removes ticks from a rhinoceros, benefiting the rhino without harming itself?
What do nonliving components of ecosystems primarily do regarding chemicals?
What do nonliving components of ecosystems primarily do regarding chemicals?
Which statement best explains the upward trend in water levels over two years?
Which statement best explains the upward trend in water levels over two years?
During which month did the water level reach its highest point in the provided data?
During which month did the water level reach its highest point in the provided data?
What is the primary function of living components in ecosystems concerning chemicals?
What is the primary function of living components in ecosystems concerning chemicals?
What does the ecological footprint measure?
What does the ecological footprint measure?
What likely occurred if the water in the bucket remained stable, without overflowing or drying up?
What likely occurred if the water in the bucket remained stable, without overflowing or drying up?
If the water level started at 30 cm and never overflowed throughout two years, what can be inferred?
If the water level started at 30 cm and never overflowed throughout two years, what can be inferred?
How does vegetation directly influence water levels in this ecosystem?
How does vegetation directly influence water levels in this ecosystem?
What defines an ecosystem?
What defines an ecosystem?
Which statement accurately describes the relationship between a community and an ecosystem?
Which statement accurately describes the relationship between a community and an ecosystem?
In an ecological food chain, if a wolf consumes a rabbit, what category does the wolf fall into?
In an ecological food chain, if a wolf consumes a rabbit, what category does the wolf fall into?
What distinguishes producers in an ecosystem?
What distinguishes producers in an ecosystem?
How does energy flow differ from nutrient cycling in ecosystems?
How does energy flow differ from nutrient cycling in ecosystems?
Which type of organism is identified as a detritivore in an ecosystem?
Which type of organism is identified as a detritivore in an ecosystem?
What is the role of abiotic factors in an ecosystem?
What is the role of abiotic factors in an ecosystem?
What accurately describes a consumer in an ecosystem?
What accurately describes a consumer in an ecosystem?
What factors contribute to the rapid spread of nonnative species in a new environment?
What factors contribute to the rapid spread of nonnative species in a new environment?
In a scenario where both elephants and rabbits are at carrying capacity, what would be true about their offspring?
In a scenario where both elephants and rabbits are at carrying capacity, what would be true about their offspring?
How might fragmenting a species' range impact its survival despite having sufficient food resources?
How might fragmenting a species' range impact its survival despite having sufficient food resources?
What is a potential benefit of regular disturbances like fires in ecosystems?
What is a potential benefit of regular disturbances like fires in ecosystems?
What should be a priority when considering road projects in habitats of certain species?
What should be a priority when considering road projects in habitats of certain species?
Why might newly introduced species cause devastation in their new environment?
Why might newly introduced species cause devastation in their new environment?
What is one reason that organisms adapted to certain disturbances might struggle without them?
What is one reason that organisms adapted to certain disturbances might struggle without them?
Flashcards
Community
Community
Populations of multiple species interacting in the same area.
Ecosystem
Ecosystem
All living things (biotic) and non-living things (abiotic) in a specific area interacting.
Abiotic factors
Abiotic factors
Nonliving parts of an ecosystem.
Biotic factors
Biotic factors
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Consumer
Consumer
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Producer
Producer
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Energy flow in ecosystem
Energy flow in ecosystem
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Nutrient flow in ecosystem
Nutrient flow in ecosystem
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Population growth model for bacteria
Population growth model for bacteria
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Density-independent limiting factor
Density-independent limiting factor
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Logistic growth model
Logistic growth model
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Population's carrying capacity
Population's carrying capacity
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Effect of declining birth rate on population
Effect of declining birth rate on population
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Population density
Population density
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Species diversity
Species diversity
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Population distribution
Population distribution
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Wetland removal effect on city
Wetland removal effect on city
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Coral reef location
Coral reef location
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Freshwater biome importance
Freshwater biome importance
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Aquatic biome definition
Aquatic biome definition
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Cheetah-Gazelle-Grassland relationship (area)
Cheetah-Gazelle-Grassland relationship (area)
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Freshwater biome coverage
Freshwater biome coverage
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Importance of freshwater biomes (short)
Importance of freshwater biomes (short)
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Aquatic biome coverage (relative)
Aquatic biome coverage (relative)
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Cheetah food source
Cheetah food source
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Grassland needed for cheetahs
Grassland needed for cheetahs
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Ecosystem energy source
Ecosystem energy source
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Carbon entry in ecosystem
Carbon entry in ecosystem
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Nitrogen entry in ecosystem
Nitrogen entry in ecosystem
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Ecological Reservoirs
Ecological Reservoirs
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Ecosystem's need for energy
Ecosystem's need for energy
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10 cheetahs grassland (double)
10 cheetahs grassland (double)
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Species of concern
Species of concern
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Threatened species
Threatened species
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Sustainable development
Sustainable development
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Bioremediation
Bioremediation
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Greenhouse gas
Greenhouse gas
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Global warming
Global warming
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Greenhouse gas effect
Greenhouse gas effect
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Eating down the food chain
Eating down the food chain
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Ecosystem Disturbances
Ecosystem Disturbances
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Beneficial Disturbances
Beneficial Disturbances
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Non-native Species
Non-native Species
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Rapid Spread of Non-natives
Rapid Spread of Non-natives
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Carrying Capacity
Carrying Capacity
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Stable Population Growth
Stable Population Growth
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Population Fragmentation
Population Fragmentation
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Population Extinction Risk
Population Extinction Risk
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What is ecology?
What is ecology?
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How is ecology studied?
How is ecology studied?
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What is environmentalism?
What is environmentalism?
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Ecology vs. environmentalism
Ecology vs. environmentalism
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Population in ecology
Population in ecology
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Community in ecology
Community in ecology
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Goods and services from the environment
Goods and services from the environment
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Importance of wetlands
Importance of wetlands
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What's the difference between a community and an ecosystem?
What's the difference between a community and an ecosystem?
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Mutualism
Mutualism
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Predator-Prey
Predator-Prey
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Parasitism
Parasitism
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Competitive Exclusion Principle
Competitive Exclusion Principle
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Biological Magnification
Biological Magnification
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Primary Consumer
Primary Consumer
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What is a resource?
What is a resource?
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Wetland Removal Impact
Wetland Removal Impact
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Coral Reef Habitat
Coral Reef Habitat
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Aquatic Biome Defining Factor
Aquatic Biome Defining Factor
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Cheetah Population Support
Cheetah Population Support
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Aquatic Biome Coverage
Aquatic Biome Coverage
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Cheetah Diet
Cheetah Diet
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What are abiotic components of ecosystems where chemicals accumulate?
What are abiotic components of ecosystems where chemicals accumulate?
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What are abiotic components that require a constant chemical input?
What are abiotic components that require a constant chemical input?
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What are living components that cycle chemicals?
What are living components that cycle chemicals?
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What are living components that accumulate chemicals?
What are living components that accumulate chemicals?
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How do abiotic components act as chemical sinks?
How do abiotic components act as chemical sinks?
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How do abiotic components need constant chemical input?
How do abiotic components need constant chemical input?
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How do living components cycle chemicals?
How do living components cycle chemicals?
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How do living components accumulate chemicals?
How do living components accumulate chemicals?
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Study Notes
Ecology
- Ecology is the study of the interactions between living organisms and their environments.
- Ecology involves observing and running experiments to test hypotheses.
- Environmentalism is a philosophical and social movement concerned with preserving the environment.
- Ecology and environmentalism are not the same scientific discipline.
- An ecosystem is a collection of all the living (biotic) and non-living (abiotic) parts of an environment.
- Abiotic factors include energy, fire, nutrients.
Populations, Communities and Ecosystems
- A population is a group of organisms of the same species in a given area.
- A community is a group of populations (different species) in a given area interacting with each other.
- An ecosystem consists of a community and its nonliving (abiotic) environment.
- The difference between a community and an ecosystem is that a community only focuses on the interacting populations while an ecosystem includes the interacting populations and their surrounding environment.
- A population's carrying capacity is its maximum size for a specific environment.
Ecosystem Energy Flow
- The flow of energy in ecosystems proceeds from producers to consumers. Producers are organisms like plants. Consumers feed on plants or animals.
- Decomposers break down dead organisms and return nutrients to the soil.
- Energy generally flows in one direction through ecosystems.
- Nutrient cycles generally involve nutrient recycling within an ecosystem.
- Different organisms are assigned to different trophic levels. Example: A wolf is a consumer.
Ecosystem Diversity and Species
- Biodiversity is the variety of life in ecosystems or on Earth. Measurements of biodiversity often include: species diversity, genetic diversity, ecosystem diversity.
- Species extinction, invasive species, habitat destruction, climate change, pollution are main causes of biodiversity loss.
- Keystone species are species that have a significant effect on their environment. If removed, the ecosystem collapses.
- An invasive species is one that spreads rapidly in a non-native area and disrupts the local ecosystems.
- Different species evolve different dispersion patterns in a certain habitat.
- A species of concern is one that may face risk of extinction in the future.
- Some species are essential to an ecosystem, such as pollinator species that support plant reproduction.
- Aquatic and terrestrial biomes are defined by dominant plants, animals or climate.
- Biomes can also be defined by temperature or rainfall.
Abiotic Factors, Global Learning
- Abiotic factors are nonliving components of an ecosystem, like temperature (such as in a climate), water availability and nutrients.
- A biome is a large geographic area with a specific climate and dominant plant types.
- The distribution of biomes depends mostly on temperature and rainfall.
Other Concepts and Questions
- Succession is the gradual change in species composition of a community over time.
- Primary succession occurs on bare rock or barren ground.
- Secondary succession occurs on land that was previously occupied by a community. Examples include: the regrowth of a forest after a fire, the growth of vegetation on abandoned farmland.
- Ecological footprint estimates the land/water area needed to support a human population.
- Many species can survive the disturbances.
- An example of abiotic factors are energy, fire, and nutrients.
- An example of biotic factors are plants and animals.
- Aquatic biomes cover most of the Earth (such as oceans, lakes, rivers etc).
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