Please enable JavaScript.
Coggle requires JavaScript to display documents.
Population and Feeding the World (Human population growth consequences:…
Population and Feeding the World
Population Definition: is a particular section, group, or type of people or animals living in an area or country. Also the specified extent or degree to which an area is or has been populated.
The population greatly grew during the Industrial Revolution when the food productions multiplied.
Factors that Increase Population:
good economy
stable workforce
cheaper/ more affordable living
able to receive good education
laws
Factors that Decrease Population:
bad economy
unstable workforce
expensive or unsafe living environments
education opportunities are scarce
The human population growth: the causes
historic need for farm labor
restrictions on women's right
prohibitions on birth control
All of these 3 led to birth rates remained high:
Effects of a Growing Population:
price increase on needed materials
living prices increase
limited resources become more scarce
less space
more conformity to try and fit and accept everyone's way of living
The number of group, or type of people or animal living in an specific area or country.
A situation that causes the growth of a population to decrease is called Limiting Factors.
Human population growth: these were the causes
new technologies
more agriculture production
better medical care
better sanitation
All these 4 led to decline in death rates:
Human population growth consequences:
denser population
war, conflict, refugees
more agricultural production
more resource extraction, manufacturing, and consumption
more waste and pollution
habitat alteration
loss of biodiversity and ecosystem services
global climate change
more fossil fuel use
economic loss, health impacts, social disruption
Feeding the World:
Subsistence Agriculture: - growing enough food to meet a family's immediate needs... even livestock.
only make what you need
use the sun, own labor, and large animals
practiced in 3rd world countries and villages
smaller impact on enviroment
Draft animals- large animals and used to pull equipment
Domesticated- bred for human use.
Industrialized Agriculture:
most common in wealthy nations
uses machinery that consumes energy
uses fertilizers, pesticides, irrigation and cause more waste
few workers needed
11% of Earth's land covered in farms
25% used for grazing
requires large amounts of water
"plantation agriculture" grow large amounts of a single crop. ex. bananas, cocoa, and coffee.
Crop Yield- size of harvest from a particular crop
Pasture- land used for livestock grazing
Dead Zone- an area in the ocean where marine life cannot survive
Plantation Agriculture- large scale farm that only grows one crop.. usually in tropical areas
Industrialized Animal Production:
Feedlot- small area where large numbers of livestock are raised
Range land- grass-covered land that animals can gaze on
Protection Soil:
layers of soil
humus-layer of soil
Siltation- the buildup of soil in an aquatic ecosystem
No-till farming- leaving the soil undisturbed
Contour farming- planting crops around curves to reduce erosion. Soil is more fertile.
Shelter-belt - a row of trees planted to help block wind
World Food Supply and Nutrition
Green Revolution- a large increase in crop yields achieved by developing new varieties of plants... ex: wheat
Dietary Needs:
calories
protein-eggs
fats-meats
carbs-sugar
iron-meat; dark leaves
calcium-milk
vitamin C-fruits
Malnutrition:
not consuming enough fats, carbs, or protein
leads to anemia, over nutrition, and famine
Over nutrition- too much food
Famine- not enough food
Sustainable Agriculture- producing food without depriving future generations. ex; organic.
Farmers Market- local farmers sell their produce
Community-Supported Agriculture- system where members pay farmers weekly
Shade-Grown Coffee:
Coffee grown in the shade of tropical trees. Reduce cutting trees.
11.5: Fisheries
gill and drift nets
by catch
Problem:
-immature
-overfishing
-by catch
-longline- lots of hook
-trawl net long line dragging on ocean floor