APES midterm

Represents the growth of a population predicted by the logistic model

c

if the population of a country grows at a rate of approximately 5 percent per year, the number of years required for the population to double is closest to

fifteen years

a type III survivorship curve , which decreases at first and shows a leveling off in older specimens, is

typical of amphibians and most fish

in the transition from each trophic level of the food chain to the next trophic level, the upper level receives ___ of the energy available from the lower level.

10%

in the transition from each trophic level of the food chain to the next trophic level, is about a

80-95% loss of energy

represents the biotic potential of the species without limiting factors

D

represents the maximum number of individuals that can be supported by a particular ecosystem on a long-term basis ________

E

which characteristics tend to increase the risk of species becoming endangered?

I and II only I. having very limited distribution II. being a specialist at the end of a long food chain

using the food web to the right, which scenarios are possible?

II only decreasing the deer population will result in collapse of the wolf population

a large forested area is fragmented into small forest tracks separated by agricultural areas. This change will most likely lead to

a decrease in the gene flow within species of the original forest

the consumption of mosquitoes by bats and the control of flooding provided in mountainous areas of central america are examples of

ecosystem services

which statement best describes energy transfer in a food web?

energy from the sun is stored in green plants and transferred to consumers through herbivory

a city developed a forested area for housing, stores, and restaurants. which set shows the most likely effects on parts of the water cycle in the area?

evaporation and transpiration- decrease runoff- increase groundwater and recharge- decrease

which factor can be used to assess the biological diversity of an area

genetic variation within each species and number of species present

which factor can be used to assess the biological diversity of an area?

genetic variation within species and number of species present

all of the following are advantages to protecting biodiversity EXCEPT

it ensures access it helps to reduce our dependence on the environment

all of the following are advantages to protecting biodiversity EXCEPT

it helps to reduce our dependence on the environment

which situation best illustrates an abiotic component of the environment affect a biotic component of the environment

low phosphorous content in the soil limits the groth of vegetation.

you later discover that you sampled one area of the park that was most favorable by chipmunks. what effect would this have on your estimate?

my estimate is probably too high.

Road construction, logging, and mining are banned in which federal lands?

national wilderness preservation areas

road construction, logging, and mining are banned in which federal lands?

national wilderness preservation areas

in ecosystems, organisms at the highest trophic levels usually contain less collective biomass than the organisms at lower trophic levels because

organisms are inefficient at converting the energy they consume into biomass.

In ecosystems, organisms at the highest trophic levels usually contain less collective biomass than the organisms at lower tyrophic levels because

organisms are inefficient st converting the energy into biomass

in general which long-term method is best for preventing extinctions

protecting the habitats of endangered species

in general, which long-term method is best for preventing extinctions?

protecting the habitats of endangered species

which justification is appropriate for designing one of the reserves in the diagram above?

reserve b has the smallest edge effect and will have the least disturbance

which of the following combination of processes can change global species diversity?

speciation and extrinction

what statement about "succession" is true?

succession is the change in an ecosystem structure that occurs naturally over time

which statement about succession is true?

succession is the change in an ecosystem structure that occurs naturally over time

which concept explains why there are typically not more than four or five trophic levels kin a food web?

the second law of therodynamics

the ultimate source of energy for terrestrial ecosystems is

the sun

why do introduced species often become pests

they displace native species

why do introduced species often become pests?

they displace native species

The Isyle Royal food chain controlled by wolf predation. this is an example of

top down population dynamic

which biome has the highest net primary productivity

tropical rain forest

which biome has the highest net primary productivity?

tropical rain forest