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Chapter 35: Problem 20

The boreal forest, also known as taiga or coniferous forest, is found south of the Arctic Circle and across most of Canada, Alaska, Russia, and northern Europe. What are the characteristics of the boreal forest? a. high temperature b. deciduous trees c. high humidity d. acidic soil

Short Answer

Expert verified
d. acidic soil

Step by step solution

01

Identify the Boreal Forest鈥檚 Characteristics

The boreal forest, also known as taiga or coniferous forest, is located in the northern hemisphere, just south of the Arctic Circle. Begin by recalling the key characteristics of this biome.
02

Assess Temperature

The boreal forest is known for its cold climate, with long winters and short summers. Therefore, high temperature is not a characteristic. Option a is incorrect.
03

Examine Tree Types

Boreal forests are mostly composed of evergreen trees, particularly conifers like pines, spruces, and firs. Deciduous trees are not predominant. Hence, option b is incorrect.
04

Evaluate Humidity

While boreal forests do receive some precipitation, they are generally not known for high humidity. Thus, option c does not accurately describe the boreal forest.
05

Check Soil Acidity

Boreal forests often have acidic soils due to the needle-like leaves of coniferous trees, which decompose and increase the soil鈥檚 acidity. Therefore, acidic soil is a correct characteristic, making option d correct.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Taiga Biome
The boreal forest, also commonly referred to as the taiga biome, stretches across the northern hemisphere, just south of the Arctic Circle. This biome covers vast areas in regions, such as Canada, Alaska, Russia, and northern Europe. Characterized by its cold climate and dense forests, the taiga biome is unique in its ecosystem.
The taiga serves as a critical habitat for various wildlife species, including wolves, bears, and lynxes. It is also home to migrating birds during certain times of the year.
  • The taiga experiences long, harsh winters with minimal daylight.
  • Summers are brief and relatively cool.
  • The temperature span can be quite extreme, transitioning from icy winters to warmer months.
Coniferous Forest
Boreal forests are predominantly made up of coniferous trees. These trees form expansive forests spreading across the taiga biome.
Coniferous forests are essential for various reasons:
  • Coniferous trees are evergreen, meaning they retain their leaves throughout the year.
  • Common conifers found in the taiga include pines, spruces, and firs.
  • The needle-like leaves are adapted to conserve water and withstand cold temperatures.
Coniferous forests play a significant role in providing lumber and other resources, making them economically important as well.
Acidic Soil
One of the defining characteristics of boreal forests is their acidic soil. This acidity primarily results from the continuous fall of needle-like leaves from coniferous trees.
The decomposition process of these leaves adds to the soil's acidity.
  • Acidic soils can limit the variety of plant species that can grow in the boreal forests.
  • Such soils can influence the water chemistry of streams and rivers in the area, affecting aquatic life.
Acidic soil can also affect the nutrient cycle, often making nutrients less available to plants.
Cold Climate
The boreal forest is synonymous with a cold climate. Characterized by long, frigid winters and short, cool summers, this climate shapes the entire ecosystem of the taiga biome.
The weather patterns in these regions are quite severe:
  • Temperatures in winter can drop as low as -40 degrees Celsius (-40 degrees Fahrenheit).
  • Summer temperatures rarely exceed 20 degrees Celsius (68 degrees Fahrenheit).
The climate influences not only plant life but also animal behavior, with many species adapting to survive the extreme cold or migrating during different seasons.
Evergreen Trees
Evergreen trees, a dominant feature of the boreal forest, keep their foliage throughout all seasons. This is crucial for survival in the taiga biome, where conditions can be harsh:
  • These trees are able to photosynthesize whenever temperature conditions allow, even during the winter.
  • Evergreens like pines, spruces, and firs have needle-like leaves that reduce water loss and resist freezing.
Evergreen forests provide continuous cover and food sources for various wildlife species year-round.

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Most popular questions from this chapter

As global temperatures change, many flowering plants are flowering earlier. What change would most likely occur if the insect pollinators are not around at the same time? a. Insects will be deprived of their nectar, leading to decrease in numbers; but flowering plants will not be affected, as other animals will pollinate them. b. Flowering plants will not be pollinated resulting in their less population; but insects will not be affected, as insects will feed on other organisms. c. Neither plants nor pollinators will be affected, as new or different species of insects are going to pollinate the flowering plants. d. Both plant and pollinator numbers would decrease, as insects will be deprived of nectar and plants will not be pollinated.

In a forest fire, many oak trees were destroyed. After the fire, numerous taller trees replaced the oak trees. What is the best explanation of this event? a. The tall trees grow faster and create a canopy, which did not allow oak trees to grow. b. The burning of the trees changed the pH of the soil, which did not allow oak to grow. c. Roots of shrubs and trees proliferate, taking over the place of the oak trees. d. Oak trees succumb to pests, thus other pest resistant trees are able to proliferate.

What are possible consequences if there is a big oil spill in the middle of the ocean? How will it affect the biodiversity and the net primary productivity? What are some strategies to clean up this oil spill? a. Oil spills increase the amount of light and oxygen entering the ocean. The phytoplanktons may perish. Presence of oil would limit mobility of marine animals and may result in death. Some chemicals and bioremediation can help oil clean up. b. Oil spills increase the amount of light and oxygen entering the ocean. The phytoplanktons may increase. The mobility of marine animals increases. Biodiversity and, therefore, net primary productivity increases. Some chemicals and bioremediation can help oil clean up. c. Oil spills cover the surface of the ocean, reducing the amount of light entering the ocean. The marine organisms that can survive independent of light will not be affected. Some chemicals and bioremediation can help oil clean up. d. Oil spills cover the surface of the ocean, reducing the amount of light and oxygen entering the ocean. The phytoplankton may perish. Presence of oil would limit mobility of marine animals and may result in death. Some chemicals and bioremediation can help oil clean up

All of the following are natural factors have led to slow increases in global temperatures except____. a. volcanic eruptions b. change in solar intensity c. earthquakes d. changes in the earth鈥檚 orbit

If algae grows out of proportion as seen during algal blooms, how does it affect the ecosystem? a. Photosynthetic organisms will not be able to grow. The animals and birds that live on those organisms will be affected. As the algae die, oxygen will be depleted, affecting fish and other aquatic animals. The pH of water will change, affecting metabolic processes as well. b. Non-photosynthetic organisms will not be able to grow due to lack of light. The photosynthetic organisms that require them to live will be affected. As the algae die, oxygen will be depleted, affecting fish and other aquatic animals. The pH of water will change, affecting metabolic processes as well. c. Photosynthetic organisms will not be able to grow. The animals and birds that live on those organisms will be affected. As the algae die, carbon dioxide will be depleted, affecting fish and other aquatic animals. The pH of water will change, affecting metabolic processes as well. d. Non-photosynthetic organisms will not be able to grow. The animals and birds that live on those organisms will be affected. As the algae die, carbon dioxide will be depleted, affecting fish and other aquatic animals. The pH of water will change, affecting metabolic processes as well.
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