Lecture 17 Flashcards
How do patches relate to metapopulations?
A) They are irrelevant to the concept of metapopulations.
B) Patches are areas of suitable habitat surrounded by a matrix, forming part of a metapopulation.
C) Patches refer to areas where metapopulations cannot exist.
D) They are alternate terms for the same concept.
B) Patches are areas of suitable habitat surrounded by a matrix, forming part of a metapopulation.
What is the significance of island size in relation to species extinction and colonization?
A) Larger islands have a higher rate of colonization but lower extinction.
B) Island size is more important for colonization than extinction.
C) Island size is unrelated to both colonization and extinction rates.
D) Larger islands have a lower rate of colonization but higher extinction.
A) Larger islands have a higher rate of colonization but lower extinction.
In the context of island biogeography, what would you expect for islands closer to the mainland?
A) Lower species richness due to isolation.
B) Higher species richness due to easier colonization.
C) No difference in species richness compared to distant islands.
D) More species extinction due to competition
B) Higher species richness due to easier colonization.
What did the experiment in the mangrove forests of Florida demonstrate about island biogeography?
A) The size and distance of islands had no impact on insect return.
B) Larger, more distant islands saw quicker insect return.
C) Insect return was influenced by how far and large the islands were.
D) Only the largest islands saw a return of insects.
C) Insect return was influenced by how far and large the islands were.
Why do humpback whales migrate according to the lecture?
A) To follow evolutionary traditions.
B) For optimizing their energy budget.
C) To track resources effectively.
D) To avoid predation by killer whales
D) To avoid predation by killer whales.
What is a ‘metapopulation’?
A) A single population with high genetic diversity.
B) A population that is extinct or endangered.
C) A group of spatially separated populations of the same species that interact at some level.
D) A population that migrates annually over long distances.
C) A group of spatially separated populations of the same species that interact at some level.
What are ‘source’ and ‘sink’ populations in the context of metapopulations?
A) Source populations are where individuals migrate to, and sink populations are where they migrate from.
B) Source populations are high-density populations, and sink populations are low-density ones.
C) Source populations are where individuals emigrate from, and sink populations depend on them for new individuals.
D) Source and sink populations refer to urban and rural populations, respectively.
C) Source populations are where individuals emigrate from, and sink populations depend on them for new individuals.
How does island size affect species extinction and colonization in island biogeography?
A) Larger islands have higher extinction rates.
B) Smaller islands have higher colonization rates.
C) Larger islands have higher colonization rates and lower extinction rates.
D) Island size has no effect on extinction or colonization rates.
C) Larger islands have higher colonization rates and lower extinction rates.
What role does migration play in the behavior of humpback whales, as discussed in Lecture 17?
A) Migration is primarily for breeding purposes.
B) Migration helps them avoid predation by killer whales.
C) Humpback whales migrate to follow their food sources.
D) Migration is an evolutionary tradition with no current purpose
B) Migration helps them avoid predation by killer whales.
What is the definition of a habitat?
A) Area of suitable habitat that is surrounded by a matrix.
B) A region in which particular organisms reside, characterized by both biotic and abiotic components.
C) An ecological or environmental area where a specific species lives.
D) A natural environment in which different species coexist and interact.
A) Area of suitable habitat that is surrounded by a matrix
