Brazilian Deforestation: Cycle A
Topic(s): No topics assigned.
1). Reasons for deforestation are numerous and include immigration, subsistence farming, governmental policy, and cattle ranching.
2). Rainforests play a vital role in the carbon dioxide cycle in capturing CO2 from the atmosphere and converting it to plant material through photosynthesis.
3). Over half of all species currently living on Earth are believed to live in tropical rainforests â€" species diversity may be a key component to global stability.
4). Tropical rainforests play an important role in maintaining the composition and stability of the soil.
5). Deforestation disrupts the water cycle increasing runoff which in turn decreases infiltration, lowering ground water, and increasing the amount of material transported to water ways, altering the hydrosphere.
6). Positive foresting methods exist that lessen the impact on all spheres.
7). Deforestation affects global temperature change by altering the carbon cycle, water cycle, and oxygen cycle.
Scenario: Since 1970, 600,000 square kilometers of the Amazon rainforest have been lost through deforestation. Various causes have been cited, to include clearing for cattle grazing, colonization, agriculture, infrastructure expansion and logging.
These rates of tropical deforestation raise many questions. What happens to our planet when a rainforest disappears? What happens to air quality when the rainforests are gone? What happens to the soil when a rainforest disappears? What happens to surrounding water quality when a forest is burned to make way for farming and grazing? When the forest is gone, will it come back? People can move to cities, but where do the animals, birds, and insects go?
Doing research to find out about tropical deforestation can lead to learning about biology, agriculture, rainforests, population growth, endangered species, habitats, land use practices, global warming, weather, climate change, and air quality.
Bob Myers, IGES
Sphere Group Study
During this cycle you will become "experts" in the relationship of individual spheres. You will need to study the resources listed under readings, discuss your key ideas in your sphere group discussion space, and then submit your group's work for a grade.
Go to the course discussion space to find out which sphere you are studying during this module.
Read the scenario.
First, submit your individual questions and prior knowledge about this event and Earth system science to your sphere group discussion space. Then prepare a document about your prior knowledge and upload it to ESSEA.
|Deadline: Friday, February 3 2017 11:59 PM (Eastern Time)|
Upload your group's most accurate analysis of the Sphere - Event interactions with reasoning and support to ESSEA and complete the rubric.
|Deadline: Friday, February 10 2017 11:59 PM (Eastern Time)|
|Individual: Individual Reflection Rubric (Jigsaw, Cycle A)|
|Team: Group Sphere Study Rubric (Jigsaw, Cycle A)|
|Assessment is unavailable|
Exploring The Environment: Loss of Habitat and Biodiversity
Earth Observatory: Tropical Deforestation
Encyclopedia of Earth - Deforestation in Amazonia
Human Impact: Deforestation and Desertification
World Resources Institute: Saving the Woods