Podcast
Questions and Answers
What does species richness measure?
What does species richness measure?
- The relative abundance of different species
- The interactions between different species
- The total number of individuals in a community
- The number of species present in an area (correct)
Which hypothesis emphasizes the role of abiotic factors in species success?
Which hypothesis emphasizes the role of abiotic factors in species success?
- Community Structure Hypothesis
- Interactive Hypothesis
- Coexistence Hypothesis
- Individualistic Hypothesis (correct)
What is a keystone predator's role in an ecosystem?
What is a keystone predator's role in an ecosystem?
- It primarily feeds on plants to maintain balance
- It controls the population of prey species (correct)
- It has no significant effect on biodiversity
- It competes for resources with other apex predators
In which interaction does one organism benefit while the other is harmed?
In which interaction does one organism benefit while the other is harmed?
What type of coloration involves an organism blending in with its environment?
What type of coloration involves an organism blending in with its environment?
Which of the following describes mutualism?
Which of the following describes mutualism?
Which interaction involves competition for limited resources?
Which interaction involves competition for limited resources?
What does species diversity take into account?
What does species diversity take into account?
Which type of interaction occurs when one species kills and consumes another?
Which type of interaction occurs when one species kills and consumes another?
Which factor does not typically influence species richness in a given area?
Which factor does not typically influence species richness in a given area?
What is species diversity primarily concerned with?
What is species diversity primarily concerned with?
Which of the following correctly describes the Interactive Hypothesis?
Which of the following correctly describes the Interactive Hypothesis?
Which type of interspecific interaction can result in one species being harmed while the other benefits?
Which type of interspecific interaction can result in one species being harmed while the other benefits?
What is an example of commensalism?
What is an example of commensalism?
What do keystone predators help maintain in an ecosystem?
What do keystone predators help maintain in an ecosystem?
Which interaction describes organisms competing for limited resources?
Which interaction describes organisms competing for limited resources?
What role do cryptic coloration and aposematic coloration play in an organism's survival?
What role do cryptic coloration and aposematic coloration play in an organism's survival?
What does the Individualistic Hypothesis suggest about species composition?
What does the Individualistic Hypothesis suggest about species composition?
How are abiotic factors characterized in community ecology?
How are abiotic factors characterized in community ecology?
Which type of symbiotic interaction involves both organisms benefiting?
Which type of symbiotic interaction involves both organisms benefiting?
What is a characteristic of Batesian mimicry?
What is a characteristic of Batesian mimicry?
Which of the following examples illustrates Müllerian mimicry?
Which of the following examples illustrates Müllerian mimicry?
What is one way plants defend themselves against herbivores?
What is one way plants defend themselves against herbivores?
What are the two main types of competition outlined in the content?
What are the two main types of competition outlined in the content?
According to the competitive exclusion principle, what generally happens to two species with overlapping niches?
According to the competitive exclusion principle, what generally happens to two species with overlapping niches?
Which scientist demonstrated the competitive exclusion principle through experiments with Paramecia?
Which scientist demonstrated the competitive exclusion principle through experiments with Paramecia?
What allows species to coexist despite having overlapping niches?
What allows species to coexist despite having overlapping niches?
What is a key takeaway regarding interactions between species?
What is a key takeaway regarding interactions between species?
Which characteristic is NOT a function of plant defenses?
Which characteristic is NOT a function of plant defenses?
Which of the following accurately defines exploitative competition?
Which of the following accurately defines exploitative competition?
Which of the following best describes the concept of symbiosis?
Which of the following best describes the concept of symbiosis?
What is the primary focus of the interactive hypothesis?
What is the primary focus of the interactive hypothesis?
Which form of mimicry involves a harmless species mimicking a harmful species?
Which form of mimicry involves a harmless species mimicking a harmful species?
What type of competition involves direct interactions between organisms over resources?
What type of competition involves direct interactions between organisms over resources?
Which term refers to the predator's ability to maintain biodiversity in a community?
Which term refers to the predator's ability to maintain biodiversity in a community?
What does species diversity measure?
What does species diversity measure?
What does cryptic coloration help an organism achieve?
What does cryptic coloration help an organism achieve?
In community ecology, what is the definition of species richness?
In community ecology, what is the definition of species richness?
Which of the following is an example of parasitism?
Which of the following is an example of parasitism?
What does the competitive exclusion principle state?
What does the competitive exclusion principle state?
What factor is emphasized by the Interactive Hypothesis in community ecology?
What factor is emphasized by the Interactive Hypothesis in community ecology?
Which type of competition is characterized by direct interactions over resources?
Which type of competition is characterized by direct interactions over resources?
Which type of mimicry is described when a harmless species imitates a harmful one?
Which type of mimicry is described when a harmless species imitates a harmful one?
What does the concept of symbiosis entail?
What does the concept of symbiosis entail?
What is a primary effect of the absence of a keystone predator in an ecosystem?
What is a primary effect of the absence of a keystone predator in an ecosystem?
Which adaptation helps an organism avoid detection by predators?
Which adaptation helps an organism avoid detection by predators?
What is the primary benefit of mutualism between two species?
What is the primary benefit of mutualism between two species?
What is a common trait associated with aposematic coloration in organisms?
What is a common trait associated with aposematic coloration in organisms?
Which factor contributes to species diversity in a community?
Which factor contributes to species diversity in a community?
What is the primary difference between species richness and species diversity?
What is the primary difference between species richness and species diversity?
How does removing a keystone predator typically affect an ecosystem?
How does removing a keystone predator typically affect an ecosystem?
What role do abiotic factors play in the individualistic hypothesis?
What role do abiotic factors play in the individualistic hypothesis?
Which of the following is an example of mutualism?
Which of the following is an example of mutualism?
What is the effect of aposematic coloration in organisms?
What is the effect of aposematic coloration in organisms?
What is one major characteristic of parasitism in symbiotic relationships?
What is one major characteristic of parasitism in symbiotic relationships?
What type of mimicry involves a harmless species mimicking a harmful one?
What type of mimicry involves a harmless species mimicking a harmful one?
Which characteristic do mutualistic relationships frequently exhibit?
Which characteristic do mutualistic relationships frequently exhibit?
What does competition in community ecology generally involve?
What does competition in community ecology generally involve?
What does Müllerian mimicry involve?
What does Müllerian mimicry involve?
Which of the following is a chemical defense mechanism used by plants?
Which of the following is a chemical defense mechanism used by plants?
What defines interference competition among species?
What defines interference competition among species?
According to the Competitive Exclusion Principle, what is likely to happen when two species compete for the same resource?
According to the Competitive Exclusion Principle, what is likely to happen when two species compete for the same resource?
What experiment did Gause conduct to illustrate the Competitive Exclusion Principle?
What experiment did Gause conduct to illustrate the Competitive Exclusion Principle?
What is the primary factor that can alter the outcome of competition between species?
What is the primary factor that can alter the outcome of competition between species?
How can physical defenses in plants deter herbivores?
How can physical defenses in plants deter herbivores?
What occurs during exploitative competition?
What occurs during exploitative competition?
What is a consequence of the Competitive Exclusion Principle in ecology?
What is a consequence of the Competitive Exclusion Principle in ecology?
What is the main purpose of chemical defenses in plants?
What is the main purpose of chemical defenses in plants?
What does the term species richness specifically refer to?
What does the term species richness specifically refer to?
How does environmental moisture levels relate to species richness?
How does environmental moisture levels relate to species richness?
What key role does a keystone predator play in an ecosystem?
What key role does a keystone predator play in an ecosystem?
In what way does interspecific competition differ from intraspecific competition?
In what way does interspecific competition differ from intraspecific competition?
What does mutualism entail in a symbiotic relationship?
What does mutualism entail in a symbiotic relationship?
How does the individualistic hypothesis explain species distribution?
How does the individualistic hypothesis explain species distribution?
Which interaction is considered parasitism?
Which interaction is considered parasitism?
What is a common defense mechanism employed by prey to evade predators?
What is a common defense mechanism employed by prey to evade predators?
What characterizes the interactive hypothesis in community ecology?
What characterizes the interactive hypothesis in community ecology?
Which factor is likely to influence the species composition within a community according to the interactive hypothesis?
Which factor is likely to influence the species composition within a community according to the interactive hypothesis?
In the context of community ecology, what does the term symbiosis refer to?
In the context of community ecology, what does the term symbiosis refer to?
How does the individualistic hypothesis explain the presence of species in a community?
How does the individualistic hypothesis explain the presence of species in a community?
What effect can the removal of a keystone predator have on a community?
What effect can the removal of a keystone predator have on a community?
What form of interspecific interaction involves one organism benefiting at the expense of another?
What form of interspecific interaction involves one organism benefiting at the expense of another?
Which of the following metrics is used to analyze community structure?
Which of the following metrics is used to analyze community structure?
What is one consequence of competition between different species for resources?
What is one consequence of competition between different species for resources?
Which of the following best describes predation?
Which of the following best describes predation?
What role does species diversity play in ecosystem stability?
What role does species diversity play in ecosystem stability?
What defines commensalism in ecological relationships?
What defines commensalism in ecological relationships?
What is the primary purpose of aposematic coloration?
What is the primary purpose of aposematic coloration?
Which of the following statements accurately describes Batesian mimicry?
Which of the following statements accurately describes Batesian mimicry?
What best characterizes interference competition?
What best characterizes interference competition?
What is the result of the competitive exclusion principle?
What is the result of the competitive exclusion principle?
Which of the following describes exploitative competition?
Which of the following describes exploitative competition?
What is the function of cryptic coloration?
What is the function of cryptic coloration?
What occurs during mutualism?
What occurs during mutualism?
What is an example of Müllerian mimicry?
What is an example of Müllerian mimicry?
In which relationship do parasites thrive?
In which relationship do parasites thrive?
What is the primary characteristic of commensalism?
What is the primary characteristic of commensalism?
Which type of coloration indicates a species is toxic or unpleasant?
Which type of coloration indicates a species is toxic or unpleasant?
Which of the following describes a plant's physical defense against herbivores?
Which of the following describes a plant's physical defense against herbivores?
Which characteristic is typical of parasitism?
Which characteristic is typical of parasitism?
Which adaptation helps organisms to avoid predator detection?
Which adaptation helps organisms to avoid predator detection?
What do secondary compounds in plants typically do?
What do secondary compounds in plants typically do?
Which type of mimicry involves a harmless species imitating a toxic one?
Which type of mimicry involves a harmless species imitating a toxic one?
What defines species diversity in a community?
What defines species diversity in a community?
Which factor is primarily associated with the Individualistic Hypothesis?
Which factor is primarily associated with the Individualistic Hypothesis?
Which interaction describes organisms using resources in a way that limits their availability to others?
Which interaction describes organisms using resources in a way that limits their availability to others?
What effect do keystone predators have on an ecosystem?
What effect do keystone predators have on an ecosystem?
What is the primary focus of community ecology?
What is the primary focus of community ecology?
Which term refers to the interactions that occur between individuals of different species?
Which term refers to the interactions that occur between individuals of different species?
How do areas with higher rainfall typically affect species richness?
How do areas with higher rainfall typically affect species richness?
What is a primary characteristic of interference competition?
What is a primary characteristic of interference competition?
Which condition best describes a community with greater stability and balance?
Which condition best describes a community with greater stability and balance?
What characteristic is considered a reason why arrival timing impacts community composition?
What characteristic is considered a reason why arrival timing impacts community composition?
Which type of relationship benefits one organism while the other is neither harmed nor helped?
Which type of relationship benefits one organism while the other is neither harmed nor helped?
How does species diversity contribute to ecosystem stability?
How does species diversity contribute to ecosystem stability?
What characterizes the keystone predator's role in an ecosystem?
What characterizes the keystone predator's role in an ecosystem?
Which hypothesis emphasizes the significance of chance events in community composition?
Which hypothesis emphasizes the significance of chance events in community composition?
What is the primary method organisms use to evade predators in their environment?
What is the primary method organisms use to evade predators in their environment?
What is species richness primarily concerned with?
What is species richness primarily concerned with?
In the context of symbiotic relationships, which scenario illustrates parasitism?
In the context of symbiotic relationships, which scenario illustrates parasitism?
Which type of symbiotic relationship occurs when both species benefit from the interaction?
Which type of symbiotic relationship occurs when both species benefit from the interaction?
What factor typically increases species richness in a community?
What factor typically increases species richness in a community?
What defines Batesian mimicry?
What defines Batesian mimicry?
Which of the following accurately describes Müllerian mimicry?
Which of the following accurately describes Müllerian mimicry?
What is the primary purpose of plant defenses?
What is the primary purpose of plant defenses?
Which option best describes interference competition?
Which option best describes interference competition?
What is exploitative competition characterized by?
What is exploitative competition characterized by?
How did Gause demonstrate the competitive exclusion principle?
How did Gause demonstrate the competitive exclusion principle?
Which statement best defines an ecological niche?
Which statement best defines an ecological niche?
What is aposematic coloration primarily used for?
What is aposematic coloration primarily used for?
What is the main outcome when two species have identical ecological niches?
What is the main outcome when two species have identical ecological niches?
What does bottom-up control in community structure imply?
What does bottom-up control in community structure imply?
What is the primary advantage of larger preserves for species diversity?
What is the primary advantage of larger preserves for species diversity?
What does the species-area curve indicate about larger areas?
What does the species-area curve indicate about larger areas?
How does habitat fragmentation primarily affect species diversity?
How does habitat fragmentation primarily affect species diversity?
What is the effect of habitat corridors on fragmented ecosystems?
What is the effect of habitat corridors on fragmented ecosystems?
What impact do predators have in top-down control of community structure?
What impact do predators have in top-down control of community structure?
What does the flattening of the species-area curve represent?
What does the flattening of the species-area curve represent?
What role does connectivity play in habitats?
What role does connectivity play in habitats?
Why do larger areas generally support higher species richness?
Why do larger areas generally support higher species richness?
What outcome is commonly associated with the fragmentation of habitats?
What outcome is commonly associated with the fragmentation of habitats?
What process minimizes competition between sympatric species by dividing resources?
What process minimizes competition between sympatric species by dividing resources?
What is the difference between a fundamental niche and a realized niche?
What is the difference between a fundamental niche and a realized niche?
What is character displacement primarily driven by?
What is character displacement primarily driven by?
What is a key characteristic of secondary succession?
What is a key characteristic of secondary succession?
How much energy is typically transferred from one trophic level to the next?
How much energy is typically transferred from one trophic level to the next?
Which of these is an example of a pioneer species in primary succession?
Which of these is an example of a pioneer species in primary succession?
What role do detritivores play in an ecosystem?
What role do detritivores play in an ecosystem?
What ecological concept describes the changes in species composition following a disturbance?
What ecological concept describes the changes in species composition following a disturbance?
What is a common outcome of character displacement among sympatric species?
What is a common outcome of character displacement among sympatric species?
Which of the following statements about energy flow in ecosystems is true?
Which of the following statements about energy flow in ecosystems is true?
How do sympatric species typically minimize competition for resources?
How do sympatric species typically minimize competition for resources?
What is character displacement primarily responsible for?
What is character displacement primarily responsible for?
What defines an organism's realized niche?
What defines an organism's realized niche?
Which of the following describes primary succession?
Which of the following describes primary succession?
Which statement best describes the flow of energy through ecosystems?
Which statement best describes the flow of energy through ecosystems?
In ecological succession, what is the role of pioneer species?
In ecological succession, what is the role of pioneer species?
What characterizes the climax community in ecological succession?
What characterizes the climax community in ecological succession?
What is the primary function of detritivores in an ecosystem?
What is the primary function of detritivores in an ecosystem?
How does competition influence an organism's fundamental niche?
How does competition influence an organism's fundamental niche?
Which approach could be used to understand community structure?
Which approach could be used to understand community structure?
What is the primary role of detritivores in nutrient cycling?
What is the primary role of detritivores in nutrient cycling?
What does the bottom-up control model primarily focus on?
What does the bottom-up control model primarily focus on?
What does the species-area curve demonstrate?
What does the species-area curve demonstrate?
What is a major benefit of preserving larger areas of habitat?
What is a major benefit of preserving larger areas of habitat?
How does habitat fragmentation affect species richness?
How does habitat fragmentation affect species richness?
What is the expected outcome when applying the top-down control model?
What is the expected outcome when applying the top-down control model?
What is one method to mitigate the effects of habitat fragmentation?
What is one method to mitigate the effects of habitat fragmentation?
What happens to species richness as we move toward smaller habitat areas?
What happens to species richness as we move toward smaller habitat areas?
What trend is observed in the species-area curve as area increases?
What trend is observed in the species-area curve as area increases?
How do detritivores contribute to ecosystem health?
How do detritivores contribute to ecosystem health?
What is character displacement primarily concerned with?
What is character displacement primarily concerned with?
What describes the role of a fundamental niche?
What describes the role of a fundamental niche?
Which statement correctly defines ecological succession?
Which statement correctly defines ecological succession?
During energy transfer, what percentage of energy typically moves from producers to herbivores?
During energy transfer, what percentage of energy typically moves from producers to herbivores?
What is the main role of producers in an ecosystem?
What is the main role of producers in an ecosystem?
What is the primary consequence of competitive exclusion?
What is the primary consequence of competitive exclusion?
Which of the following describes secondary succession?
Which of the following describes secondary succession?
In terms of resource partitioning, which situation illustrates this concept?
In terms of resource partitioning, which situation illustrates this concept?
Which type of niche is defined as the actual role and space that an organism occupies?
Which type of niche is defined as the actual role and space that an organism occupies?
What role do climax communities serve in ecosystems?
What role do climax communities serve in ecosystems?
What happens to energy as it moves up the trophic levels in an ecosystem?
What happens to energy as it moves up the trophic levels in an ecosystem?
In the bottom-up control model, what primarily influences the community structure?
In the bottom-up control model, what primarily influences the community structure?
What role do larger, interconnected habitats play in conservation?
What role do larger, interconnected habitats play in conservation?
Which process contributes to energy loss in ecosystems?
Which process contributes to energy loss in ecosystems?
How does habitat fragmentation affect biodiversity?
How does habitat fragmentation affect biodiversity?
What is a significant reason for energy loss as it moves through trophic levels?
What is a significant reason for energy loss as it moves through trophic levels?
What does top-down control in community structure refer to?
What does top-down control in community structure refer to?
Why are food chains typically limited to five to six trophic levels?
Why are food chains typically limited to five to six trophic levels?
What is the purpose of resource partitioning among sympatric species?
What is the purpose of resource partitioning among sympatric species?
Which of the following describes character displacement?
Which of the following describes character displacement?
What does the fundamental niche represent in ecology?
What does the fundamental niche represent in ecology?
Which term best describes the stable, long-lived community that is the final stage of ecological succession?
Which term best describes the stable, long-lived community that is the final stage of ecological succession?
What is secondary succession?
What is secondary succession?
In which situation would primary succession occur?
In which situation would primary succession occur?
Which components are included in an organism's ecological niche?
Which components are included in an organism's ecological niche?
What does the realized niche account for?
What does the realized niche account for?
Which of the following is an example of resource partitioning?
Which of the following is an example of resource partitioning?
Which aspect does natural selection favor in the process of character displacement?
Which aspect does natural selection favor in the process of character displacement?
What is resource partitioning primarily used to avoid?
What is resource partitioning primarily used to avoid?
What is the main distinction between primary and secondary ecological succession?
What is the main distinction between primary and secondary ecological succession?
Which trophic level captures the most energy in an ecosystem?
Which trophic level captures the most energy in an ecosystem?
What happens to energy as it moves up the trophic levels in a food web?
What happens to energy as it moves up the trophic levels in a food web?
Which of the following is an example of primary succession?
Which of the following is an example of primary succession?
What defines a climax community in ecological succession?
What defines a climax community in ecological succession?
Which type of succession occurs after a disturbance that leaves soil intact?
Which type of succession occurs after a disturbance that leaves soil intact?
What is the role of detritivores in an ecosystem?
What is the role of detritivores in an ecosystem?
What is a key principle of the bottom-up approach to community structure?
What is a key principle of the bottom-up approach to community structure?
Why is the Species-Area Curve significant in ecology?
Why is the Species-Area Curve significant in ecology?
What is the purpose of habitat corridors in conservation efforts?
What is the purpose of habitat corridors in conservation efforts?
What can be a consequence of top predators in a community?
What can be a consequence of top predators in a community?
What effect does habitat size have on species richness according to the Species-Area Curve?
What effect does habitat size have on species richness according to the Species-Area Curve?
What is the primary goal of conservationists regarding habitat preservation?
What is the primary goal of conservationists regarding habitat preservation?
Which of the following accurately describes the concept of top-down control in community structure?
Which of the following accurately describes the concept of top-down control in community structure?
What impact does reducing habitat size generally have on species?
What impact does reducing habitat size generally have on species?
In terms of species richness, what is a common misconception regarding habitat size?
In terms of species richness, what is a common misconception regarding habitat size?
What is the main advantage of resource partitioning among sympatric species?
What is the main advantage of resource partitioning among sympatric species?
In ecological succession, what characterizes primary succession?
In ecological succession, what characterizes primary succession?
How is energy flow typically characterized in food chains?
How is energy flow typically characterized in food chains?
What defines the realized niche of an organism?
What defines the realized niche of an organism?
What is a defining characteristic of climax communities in ecological succession?
What is a defining characteristic of climax communities in ecological succession?
What factor predominantly influences community structure from the bottom-up?
What factor predominantly influences community structure from the bottom-up?
Why do larger areas of habitat typically support greater species diversity?
Why do larger areas of habitat typically support greater species diversity?
What determines the length of a food chain?
What determines the length of a food chain?
What does the species-area curve indicate about smaller islands?
What does the species-area curve indicate about smaller islands?
What is the typical percentage of energy transferred from one trophic level to the next?
What is the typical percentage of energy transferred from one trophic level to the next?
What factor primarily limits the length of food chains?
What factor primarily limits the length of food chains?
In a community, bottom-up control emphasizes which of the following roles?
In a community, bottom-up control emphasizes which of the following roles?
Which statement is true regarding the effects of habitat size on biodiversity?
Which statement is true regarding the effects of habitat size on biodiversity?
What is a consequence of energy loss at trophic levels?
What is a consequence of energy loss at trophic levels?
What role do predators play in top-down control of a community?
What role do predators play in top-down control of a community?
How does species richness typically change with habitat size according to the species-area curve?
How does species richness typically change with habitat size according to the species-area curve?
What ecological concept describes the role of producers in a community?
What ecological concept describes the role of producers in a community?
What changes occur during character displacement?
What changes occur during character displacement?
Which of the following best describes an ecological niche?
Which of the following best describes an ecological niche?
During what type of ecological succession do pioneer species colonize an area with intact soil?
During what type of ecological succession do pioneer species colonize an area with intact soil?
What is the fate of energy as it moves up the trophic levels in an ecosystem?
What is the fate of energy as it moves up the trophic levels in an ecosystem?
What defines a fundamental niche?
What defines a fundamental niche?
What distinguishes a realized niche from a fundamental niche?
What distinguishes a realized niche from a fundamental niche?
In primary succession, which organism is typically the first to colonize bare rock?
In primary succession, which organism is typically the first to colonize bare rock?
What is a climax community?
What is a climax community?
How does resource partitioning benefit species living in the same habitat?
How does resource partitioning benefit species living in the same habitat?
What is a characteristic of sympatric species?
What is a characteristic of sympatric species?
What does resource partitioning help species to achieve?
What does resource partitioning help species to achieve?
What is exemplified by distinct beak sizes among sympatric Galápagos finches?
What is exemplified by distinct beak sizes among sympatric Galápagos finches?
How does the fundamental niche differ from the realized niche?
How does the fundamental niche differ from the realized niche?
What best describes primary succession?
What best describes primary succession?
What percentage of energy is generally transferred to the next level in a food chain?
What percentage of energy is generally transferred to the next level in a food chain?
What does bottom-up control in community structure emphasize?
What does bottom-up control in community structure emphasize?
Which statement about ecological succession is correct?
Which statement about ecological succession is correct?
What limits the length of food chains typically to 5-6 levels?
What limits the length of food chains typically to 5-6 levels?
In an ecological niche, what role does an organism fulfill?
In an ecological niche, what role does an organism fulfill?
Flashcards
Community Ecology
Community Ecology
The study of how different species populations interact within a shared habitat.
Species Richness
Species Richness
The total number of different species in a community.
Species Diversity
Species Diversity
A measure that considers both the number of species and their relative abundance.
Individualistic Hypothesis
Individualistic Hypothesis
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Interactive Hypothesis
Interactive Hypothesis
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Interspecific Interactions
Interspecific Interactions
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Predation
Predation
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Keystone Predator
Keystone Predator
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Parasitism
Parasitism
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Commensalism
Commensalism
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Community Structure
Community Structure
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Competition
Competition
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Mutualism
Mutualism
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Batesian Mimicry
Batesian Mimicry
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Müllerian Mimicry
Müllerian Mimicry
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Plant Defenses
Plant Defenses
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Interference Competition
Interference Competition
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Exploitative Competition
Exploitative Competition
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Competitive Exclusion Principle
Competitive Exclusion Principle
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Gause's Experiment
Gause's Experiment
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Niches
Niches
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Species Interactions
Species Interactions
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Conservation & Management
Conservation & Management
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What is a population?
What is a population?
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Cryptic coloration
Cryptic coloration
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Aposematic coloration
Aposematic coloration
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What is community ecology?
What is community ecology?
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What is species richness?
What is species richness?
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What is species diversity?
What is species diversity?
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Chemical defenses
Chemical defenses
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Physical defenses
Physical defenses
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Habitat and resource availability
Habitat and resource availability
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What is an example of Müllerian mimicry?
What is an example of Müllerian mimicry?
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What is Gause's experiment about?
What is Gause's experiment about?
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What is a community?
What is a community?
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What is predation?
What is predation?
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What is competition?
What is competition?
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Symbiosis
Symbiosis
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What is commensalism?
What is commensalism?
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What is mutualism?
What is mutualism?
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What is a parasite?
What is a parasite?
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Secondary Compounds
Secondary Compounds
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Ecological niche
Ecological niche
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Bottom-up Control
Bottom-up Control
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Top-down Control
Top-down Control
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Species-Area Curve
Species-Area Curve
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Larger Preserves
Larger Preserves
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Habitat Fragmentation
Habitat Fragmentation
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Habitat Corridors
Habitat Corridors
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Connectivity
Connectivity
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Gene Flow
Gene Flow
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Ecosystem Function
Ecosystem Function
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Biodiversity
Biodiversity
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Sympatric Species
Sympatric Species
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Resource Partitioning
Resource Partitioning
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Character Displacement
Character Displacement
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Fundamental Niche
Fundamental Niche
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Realized Niche
Realized Niche
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Ecological Succession
Ecological Succession
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Primary Succession
Primary Succession
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Secondary Succession
Secondary Succession
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Energy Flow in Ecosystems
Energy Flow in Ecosystems
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Detritivores
Detritivores
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Energy Flow (10% Rule)
Energy Flow (10% Rule)
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Fundamental Niche vs. Realized Niche
Fundamental Niche vs. Realized Niche
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Primary vs. Secondary Succession
Primary vs. Secondary Succession
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10% Rule
10% Rule
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What is a climax community?
What is a climax community?
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Why are there usually limited trophic levels?
Why are there usually limited trophic levels?
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How does species richness relate to habitat size?
How does species richness relate to habitat size?
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How does top-down control influence lower trophic levels?
How does top-down control influence lower trophic levels?
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How does habitat fragmentation affect biodiversity?
How does habitat fragmentation affect biodiversity?
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What's the role of detritivores in nutrient cycling?
What's the role of detritivores in nutrient cycling?
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Climax Community
Climax Community
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What is an example of resource partitioning?
What is an example of resource partitioning?
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What is an example of character displacement?
What is an example of character displacement?
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Trophic Levels
Trophic Levels
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Conservation
Conservation
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Food Chain
Food Chain
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Food Web
Food Web
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Underpass or Fencing
Underpass or Fencing
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Maintaining Biodiversity
Maintaining Biodiversity
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Extinctions
Extinctions
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Diminishing Returns
Diminishing Returns
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Fundamental vs. Realized Niche
Fundamental vs. Realized Niche
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Community Structures: Top-down vs. Bottom-up Control
Community Structures: Top-down vs. Bottom-up Control
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Why are food chains limited?
Why are food chains limited?
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Importance of habitat size for biodiversity
Importance of habitat size for biodiversity
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Conservation and community ecology
Conservation and community ecology
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Energy Flow and Food Chains
Energy Flow and Food Chains
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Bottom-up vs. Top-down Control
Bottom-up vs. Top-down Control
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Study Notes
Community Ecology
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A community is a collection of different species populations living in the same area.
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Ecology encompasses both biotic (living) and abiotic (non-living) factors within an environment, while a community focuses on the biotic components.
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Species Richness measures the number of species present in an area. It is a simple way to understand community structure. Areas with higher rainfall and moisture tend to have higher richness.
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Species Diversity goes beyond the number of species, considering the relative abundance of each species. A diverse community has a significant number of individuals within each species, making it more stable.
Community Hypothesis
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Individualistic Hypothesis emphasizes individual species' needs and their ability to thrive in a particular environment based on abiotic factors like temperature and moisture. It accounts for chance factors like arrival time and resource availability.
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Interactive Hypothesis focuses on the biotic interactions between species, arguing that the presence or absence of other species influences the success of an organism in a community, more so than abiotic factors alone. Examples include predator-prey relationships and competition for resources.
Interactions Between Organisms
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Interspecific Interactions are interactions between different species.
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Predation is a direct interaction where one organism kills and consumes another.
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Competition is a more prolonged interaction where organisms fight over limited resources, such as food, shelter, or nesting sites.
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Keystone Predator: This predator has a positive effect on the overall biodiversity. They often control populations of prey species that could otherwise dominate the ecosystem and harm other organisms. Their absence can lead to a decrease in diversity as dominant prey species flourish.
Symbiosis
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Parasitism: One organism benefits at the expense of the other, which is known as the host. Parasites usually do not kill their host immediately, allowing for a longer-lasting relationship.
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Commensalism: One organism benefits, while the other is neither harmed nor helped.
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Mutualism: Both organisms benefit from the relationship.
Dealing with Predation
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Cryptic Coloration: Camouflaging to blend in with the environment.
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Aposematic Coloration: Displaying bright, contrasting colours to warn predators of toxicity or dangerous defenses.
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Mimicry: Resembling another organism to gain protection:
- Batesian Mimicry: A harmless species mimics a harmful one.
- Mullerian Mimicry: Multiple harmful species mimic each other.
Competition
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Interference Competition: Direct interaction where organisms physically fight or challenge each other for resources.
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Exploitative Competition: Indirect interaction where organisms compete for resources, such as food or space, without directly confronting each other.
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Competitive Exclusion Principle: In a stable environment, two species with overlapping niches (roles) cannot coexist indefinitely. The species more efficient in resource exploitation will outcompete the other, leading to the latter’s extinction or displacement from the area.
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