Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 55, Problem 4TYK
Summary Introduction
Introduction:
Forests have been cut to get a clear land for grazing livestock and farming, also many-a-times for the luxury of humans. A global deforestation is occurring at a rate of 5.6 million hectares per year, according to the United Nations Forest
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Through succession, a field becomes a forest as hardwood trees become the dominant species in the ecosystem. Grasses are no longer able to compete as well in the forested environment.
grasses → shrubs → softwood trees → hardwood trees
Which is most likely the limiting factor that inhibits the growth of the grasses in the forest?
a
slow rates of decomposition on the forest floor
b
low levels of sunlight reaching the forest floor
c
thin layers of topsoil on the forest floor
d
low levels of humidity near the forest floor
Forest trees have trunks, branches, and big roots, contributing to large amounts of total biomass. Grasslands have comparatively less biomass, but have a larger net primary production than that of forests. Why is this so?
A. Less respiration is needed in the forest habitat
B. More biomass is added in a grassland in the same time as that of forests
C. The number of consumers within the forest is greater
D. Solar energy is converted to chemical energy at a much higher rate in forests
The concept of "forest disturbance" refers to
a. The emotional state of forests when they are being bothered by something
b. events such as forest fire, harvesting, wind-throw, insect and disease outbreak.*
c. Events that reduce the amount of CO2 released into the atmosphere.
d.None of the above
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Chapter 55 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 55.1 - Prob. 1SBCh. 55.1 - Prob. 2SBCh. 55.1 - Prob. 3SBCh. 55.2 - Prob. 1SBCh. 55.2 - Prob. 2SBCh. 55.3 - How does biodiversity serve as a storehouse of...Ch. 55.3 - Prob. 2SBCh. 55.4 - Prob. 1SBCh. 55.4 - Prob. 2SBCh. 55.4 - Why are conservation biologists especially...
Ch. 55.5 - Prob. 1SBCh. 55.5 - Prob. 2SBCh. 55.5 - Prob. 3SBCh. 55.6 - Prob. 1SBCh. 55.6 - Prob. 2SBCh. 55.6 - Prob. 3SBCh. 55 - Prob. 1TYKCh. 55 - Prob. 2TYKCh. 55 - Prob. 3TYKCh. 55 - Prob. 4TYKCh. 55 - Prob. 5TYKCh. 55 - Prob. 6TYKCh. 55 - Prob. 7TYKCh. 55 - Prob. 8TYKCh. 55 - Prob. 9TYKCh. 55 - Prob. 10TYKCh. 55 - Prob. 11TYKCh. 55 - Prob. 12TYKCh. 55 - Prob. 13TYKCh. 55 - Devise a field study to determine whether the...Ch. 55 - Prob. 15TYKCh. 55 - Prob. 1ITD
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- Kangaroo rats are keystone species because _______________________________. a. the seeds they eat or don't eat determine the vegetative landscape. b. their habitats also provide refuge for other organisms. c. the animals they prey upon are herbivores, which impact the landscape d. their feeding behaviors influence the local climate, which determines which plants can grow.arrow_forwardPlants, bison, elk, and wolves are all members of an ecosystem. The bison and elk are both primary consumers in this ecosystem, while the wolves are a predator. Over time, the bison completely disappear. Give an example of how the ecosystem may respond to this change, and explain how this relates to both resiliency and biodiversity?arrow_forwardWhich of the following is NOT an effect of climate change? a. Sea Level Will Rise 1-4 feet by 2100. b. Increase of greenhouse gases. c. Changes in precipitation patterns. d. Frost-free season and growing season will lengthen. True or False: A program called a debt-for-nature swap makes it financially attractive for countries to protect their tropical forests.arrow_forward
- Why is regular burning (thru natural fires) an important part of maintaining the health of grasslands and coniferous forests? Identify benefits that are specific to each biome. Also, discuss how suppressing fires could negatively affect each system.arrow_forwardIn a desert environment, the amount of plant growth is controlled by the amount of precipitation. In this case, precipitation is a(n) ____. a. limiting factor b. succession c. K-selection factor d. carrying capacity e. overshootarrow_forwardThe impacts on fire regimes in the US is strongly correlated with the change in priority given to cultural, regulating, provisioning and supporting ecosystem services. A. How did those priorities change? explain using examples B. What did that change in priority do to fire regimes present and future? C. will the changes in fire regimes benefit fire dependent or fire tolerant species? explain your reasoning, use examples)arrow_forward
- Approximately how much rain forest is being lost per year? a. 70,000 hectares b. 700,000 hectares c. 7,000 hectares d. 7,000,000 hectaresarrow_forwardWhich of these hypotheses does not explain why increased CO2 levels in the atmosphere could cause a decrease in the productivity of some crops because of changes in climate? A) There could be increases in average winter temperatures that reduce the growth of crops. B) There could be decreases in precipitation in some regions that reduce growth in some crops. C) There could be shifts in the ranges of some important species in the community, such as pollinators, that cause reduction of growth in some crops.arrow_forwardWhich of the following relationships explains the high diversity of species in tropical forests? Group of answer choices a. burning forests return CO2 to the atmosphere b. populations grow rapidly when N is small c. tropical forests occur near the equator d. high energy input allows for a large number of trophic levels e. keystone species control species diversityarrow_forward
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