Ecology B/C

[knottingpurple]

A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?

The average annual growth rate is 0.08 (percent??? what's the units??)

Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)

[kate!]

A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?

The average annual growth rate is 0.08 (percent??? what's the units??)

Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)

You put in in the

hidden text (Click to Show Hidden Text)

click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding

also, can you explain how to figure it out over three years? do you divide everything by 3?

[The48thYoshi]

The average annual growth rate is 0.08 (percent??? what's the units??)

Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)

You put in in the

hidden text (Click to Show Hidden Text)

click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding

also, can you explain how to figure it out over three years? do you divide everything by 3?

Mathematically it should be the third root, as you are multiplying the annual growth rate to itself for each year to get to the growth rate of he third year. Idk tho

[knottingpurple]

Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)

You put in in the

hidden text (Click to Show Hidden Text)

click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding

also, can you explain how to figure it out over three years? do you divide everything by 3?

Mathematically it should be the third root, as you are multiplying the annual growth rate to itself for each year to get to the growth rate of he third year. Idk tho

Although theoretically that's true, I think normally when people talk about average annual growth rate it's supposed to not take into account the effects of compounding?

[kate!]

No one's been active on here for a month, so I'll ask some questions:

1. What is the difference between bioremediation and bioaugmentation?
2. What are 2 adaptations of plants to survive in the desert biome?
3. What happens to the birth and death rates of a population after it reaches carrying capacity?

[MattChina]

No one's been active on here for a month, so I'll ask some questions:

1. What is the difference between bioremediation and bioaugmentation?
2. What are 2 adaptations of plants to survive in the desert biome?
3. What happens to the birth and death rates of a population after it reaches carrying capacity?

1. bioremediation is using naturally occurring organisms to remove environmental pollution and bioaugmentation is adding bacteria to speed up the degrading of the environmental pollutants
2.deep roots, grooves in the surface
3. it reaches an equilibrium

Question: If the trout’s diet consists of 37% mayflies and 63% phytoplankton, calculate the trophic level of the
trout to the nearest tenth.

[MattChina]

No one's been active on here for a month, so I'll ask some questions:

1. What is the difference between bioremediation and bioaugmentation?
2. What are 2 adaptations of plants to survive in the desert biome?
3. What happens to the birth and death rates of a population after it reaches carrying capacity?

1. bioremediation is using naturally occurring organisms to remove environmental pollution and bioaugmentation is adding bacteria to speed up the degrading of the environmental pollutants
2.deep roots, grooves in the surface
3. it reaches an equilibrium

Question: If the trout’s diet consists of 37% mayflies and 63% phytoplankton, calculate the trophic level of the
trout to the nearest tenth.

assuming mayflies trophic level is 2 and phytoplankton is 1

[kate!]

No one's been active on here for a month, so I'll ask some questions:

1. What is the difference between bioremediation and bioaugmentation?
2. What are 2 adaptations of plants to survive in the desert biome?
3. What happens to the birth and death rates of a population after it reaches carrying capacity?

1. bioremediation is using naturally occurring organisms to remove environmental pollution and bioaugmentation is adding bacteria to speed up the degrading of the environmental pollutants
2.deep roots, grooves in the surface
3. it reaches an equilibrium

Question: If the trout’s diet consists of 37% mayflies and 63% phytoplankton, calculate the trophic level of the
trout to the nearest tenth.

assuming mayflies trophic level is 2 and phytoplankton is 1

(2 x 0.37) + (1 x 0.63) = 1.37
The trout's trophic level is 1.37.

[MattChina]

1. bioremediation is using naturally occurring organisms to remove environmental pollution and bioaugmentation is adding bacteria to speed up the degrading of the environmental pollutants
2.deep roots, grooves in the surface
3. it reaches an equilibrium

Question: If the trout’s diet consists of 37% mayflies and 63% phytoplankton, calculate the trophic level of the
trout to the nearest tenth.

assuming mayflies trophic level is 2 and phytoplankton is 1

(2 x 0.37) + (1 x 0.63) = 1.37
The trout's trophic level is 1.37.

correct

[kate!]

New Questions! (Click to Show Hidden Text)

1. What is the primary characteristic of mollisols and in what biome is it found?
2. Name and define 3 different types of savannas.
3. If the population of a keystone species rapidly decreases, what is the effect on the ecosystem? What happens with an indicator species?