Podcast
Questions and Answers
What is the outcome of character displacement in the presence of a limiting resource?
What is the outcome of character displacement in the presence of a limiting resource?
- No change in differences between closely-related species
- Increased differences between closely-related species (correct)
- Character displacement is not affected by the presence of a limiting resource
- Reduced differences between closely-related species
Which of the following is a prediction of the competition model in the absence of character displacement?
Which of the following is a prediction of the competition model in the absence of character displacement?
- Exclusion of one species by the other (correct)
- Coexistence of similar species with identical resource use
- Coexistence of dissimilar species with different resource use
- Random coexistence of species with varying resource use
What is the purpose of calculating the resource-use-overlap index for each pair of species?
What is the purpose of calculating the resource-use-overlap index for each pair of species?
- To measure the degree of competition between species
- To identify the limiting resource
- To test the assembly rules hypothesis
- To determine the degree of niche overlap (correct)
What does the null model represent in the context of resource partitioning?
What does the null model represent in the context of resource partitioning?
What is the result of resource partitioning among coexisting species?
What is the result of resource partitioning among coexisting species?
What is the term for a group of species that exploit the same resource in a similar way?
What is the term for a group of species that exploit the same resource in a similar way?
What is the main reason why understanding assembly rules is crucial in the current era?
What is the main reason why understanding assembly rules is crucial in the current era?
Which principle states that two species cannot coexist if they have the same niche?
Which principle states that two species cannot coexist if they have the same niche?
What is the term for a group of species populations that exploit the same class of resources in a similar way?
What is the term for a group of species populations that exploit the same class of resources in a similar way?
What is the primary focus of testing assembly rules hypotheses?
What is the primary focus of testing assembly rules hypotheses?
In the context of assembly rules, what is the main goal of understanding resource partitioning?
In the context of assembly rules, what is the main goal of understanding resource partitioning?
What is the term for a group of species populations that occur together in a habitat, regardless of taxonomic relatedness?
What is the term for a group of species populations that occur together in a habitat, regardless of taxonomic relatedness?
What is the term for the ability of two species to coexist in the same habitat?
What is the term for the ability of two species to coexist in the same habitat?
What is the concept that explains how species divide resources to reduce competition?
What is the concept that explains how species divide resources to reduce competition?
What is the main force structuring the species composition of islands according to a 1975 study of species composition patterns of birds on Bismarck Archipelago?
What is the main force structuring the species composition of islands according to a 1975 study of species composition patterns of birds on Bismarck Archipelago?
What is the consequence of two species being too similar according to the Limiting Similarity principle?
What is the consequence of two species being too similar according to the Limiting Similarity principle?
What is the purpose of formulating hypotheses on generalized assembly rules?
What is the purpose of formulating hypotheses on generalized assembly rules?
What is the term for a group of species populations that share similar ecological roles in the ecosystem?
What is the term for a group of species populations that share similar ecological roles in the ecosystem?
What is the result of character displacement and resource partitioning according to the Limiting Similarity principle?
What is the result of character displacement and resource partitioning according to the Limiting Similarity principle?
What is the term for the idea that coexisting species must differ in certain aspects to exploit different resources?
What is the term for the idea that coexisting species must differ in certain aspects to exploit different resources?
What is the purpose of using null models in testing assembly rules hypotheses?
What is the purpose of using null models in testing assembly rules hypotheses?
What is the term for a set of species that exploit the same resource in a different way?
What is the term for a set of species that exploit the same resource in a different way?
Flashcards are hidden until you start studying
Study Notes
Limiting Similarity
- Coexisting species must differ in certain aspects to exploit different resources, ensuring that each species occupies a distinct ecological niche. This is because similar species competing for the same resources would lead to a reduction in population sizes, making them more vulnerable to extinction.
- Similarity cannot exceed a certain "limiting similarity" (e.g. MacArthur and Levins 1967), beyond which competition would become too intense, and one species would eventually outcompete the other, leading to competitive exclusion.
- If species are too similar, selection leads to character displacement, where one species undergoes adaptive changes to differentiate itself from its competitor. Alternatively, competition can lead to the exclusion of one species, as the superior competitor monopolizes the shared resources.
- This concept is essential in understanding the coexistence and diversity of species within ecosystems, highlighting the importance of ecological differentiation in maintaining biodiversity.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
