Why is it usually difficult to maintain productive agriculture year after year in a cleared area of the tropical rainforest? It is difficult to continually maintain productive agriculture in a cleared tropical rainforest because the soil is no longer being enriched by the natural processes of that former rainforest .
What generally happens to the elevation of the tree line going from the equator towards the poles?
Treeline elevation generally increases as one moves from the poles to the equator, but there is a wide variation in treeline elevation at a given latitude.
What are the differences among forest woodland and shrubland?
What are the differences among forests, woodlands, and shrublands? forest: trees close together little undergrowth, wide temperature zones, moist . shrubland: woody plants semiarid or arid. ... Briefly describe the desert, tundra, and wetlands plant associations.
Why is there special concern about timber firms in Japan and China purchasing logs from North American evergreen forests?
Why is there special concern about timber firms in Japan and China purchasing logs from North American evergreen forests? These trees are often cut from public forests in the United States and Canada.
What world region is experiencing the highest rate of tropical deforestation?
Nigeria . According to the FAO, Nigeria has the world's highest deforestation rate of primary forests. It has lost more than half of its primary forest in the last five years. Causes cited are logging, subsistence agriculture, and the collection of fuel wood.
What tree grows at the highest altitude?
Head to Bolivia. Guinness is wrong about the flaky firs of China. According to Guinness World Records, that veteran settler of bar bets, the world's highest trees are Abies squamata , the flaky firs of southwestern China, which can reach an elevation of 15,000 feet.
What causes tree lines on mountains?
The Unbelievable Way Plants Can Grow Without Rain! The tree line is the elevation at which trees stop growing-either because of the low temperatures, or lack of pressure and moisture . ... Researchers have noted that tree lines follow the permanent snow line of mountains.
Is chaparral the same as shrubland?
Shrublands include regions such as chaparral , woodland and savanna. Shrublands are the areas that are located in west coastal regions between 30° and 40° North and South latitude. ... The shrublands are made up of shrubs or short trees. Many shrubs thrive on steep, rocky slopes.
What is the climate of shrubland?
The climate is characterized by mild, moist winters and hot, dry summers . Trees are unable to grow in these regions and the vegetation is dominated by woody plants with a shrubby habit. ... In California scrubland vegetation growing under Mediterranean conditions occurs between 31° and 41° N and is called chaparral.
How do humans affect shrublands?
Human development poses a severe risk to shrubland habitats , because the alterations caused by buildings and roads are irreversible. Development also fragments existing shrubland communities, limiting the types of wildlife that can use these smaller habitat patches.
Which of the following is not a significant greenhouse gas?
The various greenhouse gases are carbon dioxide, methane, chlorofluorocarbon, ozone, nitrous oxide, and water vapor. Hence the gas which is not a greenhouse gas is nitrogen and the correct answer for the given question is option d).
Which of these contribute to the greenhouse effect quizlet?
Also sometimes known as “heat-trapping gases,” they are natural or human-produced gases that trap heat in the atmosphere and contribute to the greenhouse effect. Include water vapor, carbon dioxide, methane, nitrous oxide, and fluorinated gases .
What countries are the two largest emitters of greenhouse gases GHGS into the atmosphere?
| Rank Country CO 2 emissions (total) | 1 China 10.06GT | 2 United States 5.41GT | 3 India 2.65GT | 4 Russian Federation 1.71GT |
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What are the 10 causes of deforestation?
- Agricultural Activities. As earlier mentioned in the overview, agricultural activities are one of the significant factors affecting deforestation. ...
- Livestock Ranching. ...
- Illegal Logging. ...
- Urbanization. ...
- Desertification of Land. ...
- Mining. ...
- Forest Fires. ...
- Paper.
Which country has the lowest rate of deforestation?
GEORGETOWN, Guyana — Guyana recorded its lowest rate of deforestation last year since 2010, when the South American country established a national Monitoring Reporting and Verification (MRV) program.
Which country has the most deforestation 2020?
- Honduras. Historically many parts of this country were covered by trees with 50% of the land not covered by forests. ...
- Nigeria. Trees used to cover approximately 50% of the land in this country. ...
- The Philippines. ...
- Benin. ...
- Ghana. ...
- Indonesia. ...
- Nepal. ...
- North Korea.
