🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
Biology
1
answer
0
watching
336
views

Which of the following statements best describes why ecologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?

Watch
1
answer
0
watching
336
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Irving Heathcote
Irving HeathcoteLv2
28 Sep 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

Related questions

PLEASE ANSWER THESE NEATLY!!!

Discuss the following three opinions and express your agreement or disagreement with any or all of them.

• Ecologists are concerned that overpopulation will cause environmental degradation that will threaten the ecological life-support systems on which we depend.

• Economists often disagree with ecologists, arguing that economic and technological growth will enable us to solve these problems.

• Social justice advocates argue that the root cause of the problem is inequitable distribution of the Earth’s resources

1) Explain why we typically find more species under conditions of intermediate disturbance compared to either rare or frequent disturbance. (Ch. 18)

2) Why might you expect communities with fewer species to contain fewer trophic levels? (Ch. 18)

3) How do ecologists distinguish between primary and secondary succession? (Ch. 19)

4) When using a chronosequence to document the pathway of succession, what are the assumptions? (Ch. 19)

5) Why should we not expect a single climax community within a biome? (Ch. 19)

6) Compare and contrast the concepts of facilitation, inhibition, and tolerance in the context of ecological succession. (Ch. 19)

7) When a community experiences succession, why does the species richness of a community initially increase, then plateau, and finally decline? (Ch. 19)

8) Why do early- and late-successional species tend to possess different adaptations? (Ch. 19)

9) Why is the efficiency of energy transfer between two trophic levels generally quite low? (Ch. 20)

10) How do ecologists distinguish between gross primary productivity and net primary productivity? (Ch. 20)

11) Compare and contrast the measurement of primary productivity in terrestrial vs. aquatic systems. (Ch. 20)

12) What factors limit the net primary productivity of terrestrial systems? (Ch. 20)

I am having trouble with these. Can you please explain correct answer for each? Thank you so much!

Which of these would you find in the benthic zone of a freshwater lake?

A. large fish
B. submerged flowering plants
C. bacteria

D. green algae

Bogs are areas with acidic soils in which carnivorous plants can often be found preying on insects. If insects are a good source of nitrogen, why don ?t more plants in all other ecosystems adopt carnivorous habits?

A. plants in other habitats obtain nitrogen from bacteria in their root nodules.
B. insects in other habitats do not contain as much nitrogen.
C. insects are more mobile and hard to catch in non-swampy areas.

D. it is more energy efficient to absorb nitrogen from soils that are not deficient of nitrogen

Millions of acres of spruce trees have been killed due an explosive increase in spruce bark beetles in recent years, and scientists suggest global warming as the underlining cause. How could this be related to global warming?

A. longer, warmer seasons have resulted in increased beetle populations.
B. spruce is more susceptible to beetles at high temperatures.
C. global warming is the cause of acid rain, and the trees are being weakened.

D. spruce bark beetles did not attack spruce trees until the Industrial Revolution.

In sustainable farming practices involving crop rotation, should the land be covered at all times with plant material?

A. No, the decaying foliage harbors disease.
B. No, it should be tilled under to add nutrients to the soil.
C. yes, because this minimizes the breeding of pests in soil
D. yes, this lessens erosion of topsoil.

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in