Chapter 14, 16 & 23 Review Flashcards
What causes overgrazing, deforestation, erosion, soil compaction, and natural climate change?
Desertification
What are the worlds 3 main foods?
Wheat Corn and Rice
What happens when salt builds up from evaporation from application of irrigation water?
Salinization; Lowers crop yields, eventually kills plants and ruins the land.
In your garden you carefully plant ten different species, all of which mature at different times. You are practicing?
Polyculture
A person who review an adequate amount of calories but whose diet is deficient in protein and other essential nutrients suffers from…
Malnutrition
This occurs when food energy intake exceeds energy use and causes excess body fat.
Over Nutrition
How can we grow food in urban areas?
Grow plants on roof tops, vacant lots, gardens, backyards and balconies.
What occurs when too many animals graze too long and exceed the carrying capacity of a grassland area?
Overgrazing
What does overgrazing cause?
Lowers bet primary productivity of grassland vegetation, reduces grass cover and can cause desertification. Can limit livestock production.
What began in the 1980’s as a result of agriculture being drastically changed?
Green Revolution
Why did the Green Revolution occur?
Populations were growing and we needed to have more crops, irrigation, pesticides and fertilizers.
What does the Pesticide treadmill show?
It shows how pest problems get worse and worse by time.
Why do we use pesticides?
Protect our health, food and it’s convince.
What type of pesticide lasts longer?
Ecological Pesticide
What does the FIFRA do?
It requires manufactures to register pesticides with the EPA before marketing them.
As the Aral Sea’s water supply has been diverted what happened to the sea?
It began to shrink.
Why was the Three Gorges Dam created?
To generate power cheaper
What did the Three Gorges Dam cause?
It left 1.3 million people without homes because towns were under water.
What was the purpose of the California Water Transfer?
To provide water for the state of California
What was found in the Mono Lake?
A poisonous bacteria making it no longer drinkable water.
What is happening to the Colorado River?
It’s slowly drying up
What is by-catch?
Fish or other animals are unintentionally caught and are unlikely to survive.
What are some some issues with fishing?
Sometimes causes habitat damage and by-catch occurs.
