Podcast
Questions and Answers
Which type of vegetation is primarily characterized by lichens and mosses?
Which type of vegetation is primarily characterized by lichens and mosses?
- Evergreen and pine trees
- Beech and sugar maple trees
- Aquatic succession
- Mosses (correct)
What type of trees are commonly involved in primary succession?
What type of trees are commonly involved in primary succession?
- Pine trees (correct)
- Birch trees
- Beech trees
- Sugar maple trees
What is one factor that influences the ecosystem's predator population?
What is one factor that influences the ecosystem's predator population?
- Variety of plant species
- Seasonal weather changes
- Number and kinds of predators (correct)
- Proximity to urban areas
Which of the following is NOT a component of aquatic succession?
Which of the following is NOT a component of aquatic succession?
Which of the following best describes a factor that impacts soil in an ecosystem?
Which of the following best describes a factor that impacts soil in an ecosystem?
In the context of ecological succession, which type of species are usually the first to colonize a disturbed area?
In the context of ecological succession, which type of species are usually the first to colonize a disturbed area?
What aspect of an ecosystem might affect the average temperature?
What aspect of an ecosystem might affect the average temperature?
Which tree type is commonly associated with the characteristics of deciduous forests?
Which tree type is commonly associated with the characteristics of deciduous forests?
Which type of succession occurs in an area previously devoid of life due to volcanic eruptions?
Which type of succession occurs in an area previously devoid of life due to volcanic eruptions?
What determines the concentration of oxygen in an ecosystem?
What determines the concentration of oxygen in an ecosystem?
What do questions 29, 30, and 31 in the given context refer to?
What do questions 29, 30, and 31 in the given context refer to?
Which term refers to the gradual replacement of one plant community by another in a given area?
Which term refers to the gradual replacement of one plant community by another in a given area?
What is a likely characteristic of ecosystems in the climax stage of succession?
What is a likely characteristic of ecosystems in the climax stage of succession?
In ecosystems, which factor typically does not affect the concentration of oxygen?
In ecosystems, which factor typically does not affect the concentration of oxygen?
Which factor would least likely affect the population dynamics of predators in an ecosystem?
Which factor would least likely affect the population dynamics of predators in an ecosystem?
Which statement about the impacts of soil type on ecosystems is most accurate?
Which statement about the impacts of soil type on ecosystems is most accurate?
What natural event is described in the context?
What natural event is described in the context?
What impact did the eruption of Mount St. Helens have on the surrounding area?
What impact did the eruption of Mount St. Helens have on the surrounding area?
Which of the following is NOT a result of volcanic eruptions typically?
Which of the following is NOT a result of volcanic eruptions typically?
What is the primary material that covered the surrounding area during the Mount St. Helens eruption?
What is the primary material that covered the surrounding area during the Mount St. Helens eruption?
What is often a consequence of ash fall from a volcanic eruption?
What is often a consequence of ash fall from a volcanic eruption?
What geological feature is associated with volcanic eruptions like that of Mount St. Helens?
What geological feature is associated with volcanic eruptions like that of Mount St. Helens?
Which of the following best describes the term 'biodiversity' in the context of volcanic eruptions?
Which of the following best describes the term 'biodiversity' in the context of volcanic eruptions?
What is the role of ash in the ecosystem post-eruption?
What is the role of ash in the ecosystem post-eruption?
How has the new housing development affected the deer habitat?
How has the new housing development affected the deer habitat?
What is one consequence of decreased availability of food and shelter for deer?
What is one consequence of decreased availability of food and shelter for deer?
What does 'carrying capacity' refer to in the context of a deer population?
What does 'carrying capacity' refer to in the context of a deer population?
What is likely to happen to the deer population due to the encroachment of the housing development?
What is likely to happen to the deer population due to the encroachment of the housing development?
Which of the following factors contribute to the decline in deer habitat?
Which of the following factors contribute to the decline in deer habitat?
What are potential impacts on deer if their habitat continues to be developed?
What are potential impacts on deer if their habitat continues to be developed?
What does the term 'encroached' imply in relation to the deer habitat?
What does the term 'encroached' imply in relation to the deer habitat?
Why is it important to consider the effects of human development on wildlife habitats?
Why is it important to consider the effects of human development on wildlife habitats?
Which of the following describes a food chain?
Which of the following describes a food chain?
What factors can influence fish populations in an aquatic ecosystem?
What factors can influence fish populations in an aquatic ecosystem?
Which group of organisms primarily recycles nutrients in an ecosystem?
Which group of organisms primarily recycles nutrients in an ecosystem?
Which organisms are most likely at the top of a food web?
Which organisms are most likely at the top of a food web?
If the population of a grasshopper increases significantly, what is the likely outcome for its predators?
If the population of a grasshopper increases significantly, what is the likely outcome for its predators?
What ecological impact occurs when a keystone species, like the sea otter, declines in population?
What ecological impact occurs when a keystone species, like the sea otter, declines in population?
Which of the following best describes the relationship among mice, snakes, and hawks?
Which of the following best describes the relationship among mice, snakes, and hawks?
Based on the ecosystem described, which statement about energy availability among trophic levels is accurate?
Based on the ecosystem described, which statement about energy availability among trophic levels is accurate?
If a population size remains constant, what can be inferred about birth and death rates?
If a population size remains constant, what can be inferred about birth and death rates?
Which of the following scenarios could lead to a stable population size?
Which of the following scenarios could lead to a stable population size?
In what situation would a population begin to decline?
In what situation would a population begin to decline?
What does a scenario of equal birth and death rates imply?
What does a scenario of equal birth and death rates imply?
If death rates increase while birth rates remain unchanged, what is the likely effect on population size?
If death rates increase while birth rates remain unchanged, what is the likely effect on population size?
Which condition would maintain a constant population size?
Which condition would maintain a constant population size?
How would significantly reduced birth rates affect a population with stable death rates?
How would significantly reduced birth rates affect a population with stable death rates?
What combination of birth and death rates leads to a sustained population growth?
What combination of birth and death rates leads to a sustained population growth?
Flashcards
Impact of new housing development on deer
Impact of new housing development on deer
A new housing development encroaches on deer habitat, reducing food and shelter availability.
Deer habitat encroachment
Deer habitat encroachment
The process of a new development invading the natural living space of deer.
Carrying capacity
Carrying capacity
The maximum number of individuals of a species that a particular environment can support sustainably.
Reduced availability of food and shelter
Reduced availability of food and shelter
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Effect of habitat loss on carrying capacity
Effect of habitat loss on carrying capacity
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Food Web
Food Web
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Food Chain
Food Chain
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Producer
Producer
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Consumer
Consumer
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Decomposer
Decomposer
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Trophic Level
Trophic Level
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Energy Flow
Energy Flow
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Sea Otters
Sea Otters
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Killer Whales
Killer Whales
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Population Decline
Population Decline
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Types of vegetation
Types of vegetation
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Succession
Succession
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Primary succession
Primary succession
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Aquatic succession
Aquatic succession
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Mount St. Helens eruption
Mount St. Helens eruption
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Stable Population Size
Stable Population Size
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Carrying Capacity
Carrying Capacity
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Birth Rates equal Death Rates
Birth Rates equal Death Rates
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Deer Population
Deer Population
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Ecosystem
Ecosystem
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Study Notes
Food Webs
- Energy is transferred from producers to consumers
- A scientist studying a coral reef ecosystem would most likely record water temperature and oxygen content, as well as the size and number of fish species.
- Decomposers break down dead and decaying plants and animals for nutrients.
- Examples of primary consumers in a food web include mice, deer, and crickets.
Nutritional Relationships
- Organisms in the diagram that are primary consumers are mouse, deer, and crickets.
- An abiotic factor in a lake ecosystem would be fresh water algae, bacteria, and inorganic sediment.
Trophic Levels
- Organisms in trophic level 1 perform photosynthesis.
- Energy decreases as trophic levels increase.
- Trophic level 2 contains secondary consumers.
Food Web Example
- Sparrows are omnivores in a food web, consuming berries and other small creatures.
- If the grasshopper population in a food web increases, the mice population likely decreases.
- If the hawk population decreases, the snake population would probably decrease.
- A decrease in the population of one species can impact the entire food web.
Sea Otters and Killer Whales
- Sea otters prey on sea urchins, which feed on kelp, vital for fish survival.
- The decline of sea otters in western Alaska is related to killer whales increasing their consumption of otters.
- Scientists believe this change in diet for the killer whales is due to decreases in the seal and sea lion populations.
- The decline in sea otter populations is tied to over-fishing of fish by humans.
- Sea lions, polar bears, and killer whales consume fish.
Ecological Succession
- Lichens are pioneer species.
- Lichens decompose organic matter and form soil from rock.
- Lichens transform carbohydrates into fossil fuels, not directly.
- Examples of primary succession include recovery after a forest fire or glacier retreat.
- Succession involves changes in plant species until a stable system emerges.
- A key difference lies in the initial conditions (bare rock for primary, soil for secondary) and speeds of succession.
Plant Communities over time
- Plant species that thrive in barren environments, like lichen and mosses, are called pioneer organisms.
- Climax communities in some ecosystems consist of trees such as beech and sugar maples.
- The sequence of plant communities in a region shows a pattern of succession over time.
Succession
- Secondary succession occurs in regions already containing soil.
- Succession refers to the series of changes in plant species over time.
- Plant seeds and surviving producers play a role in starting new growth after disturbances, such as fires.
- Ecosystems are stable through succession with the growth of various plant communities and species.
Populations and Invasive Species
- Biotic factors include predators, affecting population sizes.
- Carrying capacity is the maximum population size of a species that an environment can sustain.
- A changing environment, like decreased food availability or loss of habitat, can impact carrying capacity.
- Introduced species can impact their new environments often disrupting the natural balance of food webs and species competition.
Exponential vs. Logistic Growth
- A population experiencing exponential growth typically exhibits unlimited resources available in the environment.
- Exponential growth, which shows a J-shaped curve, is not sustainable over time because resources eventually limit growth in an ecosystem.
- Population size usually levels off in a logistic growth curve due to limitations like food, space, and predators.
Paramecium
- The carrying capacity of P. caudatum when established by itself is 50.
- P. aurelia has a carrying capacity of 125 when growing in a combined population with another species.
- In a combined population, P. aurelia has a larger population than P. caudatum.
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Description
Explore the intricate connections within ecosystems through this quiz on food webs and trophic levels. Understand the roles of producers, consumers, and decomposers, and how energy flows in different environments. This quiz is essential for grasping ecological interactions and the balance of life.
