Ecology an der TU München | Karteikarten & Zusammenfassungen

Lernmaterialien für Ecology an der TU München

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The decline in the numbers of greater prairie chickens in Illinois in the late 20th century was a striking example of

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b & c

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Humans as Predators

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Humans introduced exotic trout for commercial fishing, impacting frog populations. 


Ultimate predators are Humans, who can greatly impact animal populations, hunting species to extinction. 


Fish impact: size reduction from 19.9-1.5kg in 1956 to 2.3-0.3kg in 2007.

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Over long periods of time, natural selection leads to

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adaptation

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A recent genetic analysis has shown that at one point, as few as _____ Florida panthers were alive.

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6

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Stabilizing selection favors:

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Intermediate phenotypes

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Many young sea turtle hatchlings are eaten by birds on their way from the nest to the ocean.
As a result, the young of some species tend to hatch synchronously, on or near the same date.
This is an example of

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Stabilizing selection.

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Intrasexual selection

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members of one sex (usually males), compete over partners, and winner performs most matings.


E.g. elephant seal, where competition promotes increased body size. Large male size correlates with mating success.

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Malthus proposed that because the earth was not overrun by humans they must be limited

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Adaptation

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When a chromosome breaks in two places and the middle segment turns around and refuses with the same pieces, we call this a(n)

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Inversion

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In which plant mating system would genetic variability decline slowest?

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mating with unrelated individuals.

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Studies on the Glanville fritillary butterfly in Finland

showed that just one generation of brother-sister mating causes

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reduced caterpillar survival

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Coexistence:

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Species may coexist if they don’t occupy identical niches.

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Q:

The decline in the numbers of greater prairie chickens in Illinois in the late 20th century was a striking example of

A:

b & c

Q:

Humans as Predators

A:

Humans introduced exotic trout for commercial fishing, impacting frog populations. 


Ultimate predators are Humans, who can greatly impact animal populations, hunting species to extinction. 


Fish impact: size reduction from 19.9-1.5kg in 1956 to 2.3-0.3kg in 2007.

Q:

Over long periods of time, natural selection leads to

A:

adaptation

Q:

A recent genetic analysis has shown that at one point, as few as _____ Florida panthers were alive.

A:

6

Q:

Stabilizing selection favors:

A:

Intermediate phenotypes

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Q:

Many young sea turtle hatchlings are eaten by birds on their way from the nest to the ocean.
As a result, the young of some species tend to hatch synchronously, on or near the same date.
This is an example of

A:

Stabilizing selection.

Q:

Intrasexual selection

A:

members of one sex (usually males), compete over partners, and winner performs most matings.


E.g. elephant seal, where competition promotes increased body size. Large male size correlates with mating success.

Q:

Malthus proposed that because the earth was not overrun by humans they must be limited

A:

Adaptation

Q:

When a chromosome breaks in two places and the middle segment turns around and refuses with the same pieces, we call this a(n)

A:

Inversion

Q:

In which plant mating system would genetic variability decline slowest?

A:

mating with unrelated individuals.

Q:

Studies on the Glanville fritillary butterfly in Finland

showed that just one generation of brother-sister mating causes

A:

reduced caterpillar survival

Q:

Coexistence:

A:

Species may coexist if they don’t occupy identical niches.

Ecology

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