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Urban Sprawl
Development of city infrastructure & use of undeveloped land for residential, commercial, and industrial buildings
Ground Subsidence
A gradual or sudden sinking of them surface due to subsurface movement of materials
Old growth forests
Natural forest uncut by people
Second growth forest (trees)
Grown to partial maturity after old-growth timber has been cut
Clear cutting
Almost all trees in a forest/area are cut down (cleared)
Controlled burns
Burning areas of forest under carefully controlled conditions
Traditional agriculture
Human & animal muscle power
Subsistence Agriculture
Families produce only food for themselves
Industrialized Agriculture
Using large scale mechanization and fossil fuels to boost yields
Total Fertility Rate (TFR)
Average number of kids born per women during her lifetime
Replacement fertility
The TFR that keeps the size of population stable
Carrying Capacity
The max number of individuals that an area can support without degrading their environment
Intensive agriculture
Produces excess food to sell- uses animals, irrigation, and fertilizer (NO FOSSIL FUELS)
Genetic engineering
Any process by which a scientist directly manipulates an organisms DNA
Age Structure Diagram
A graphical tool that displays the distribution of various age groups within a population split by gender
Aquaculture
The farming of fish in controlled environments
Baby boom
1946-1964: dramatic increase in birth rates following world war 2
Biological control
Pest management strategy that uses predators, parasites, and pathogens to reduce pest population
Birth rate
Number of live births per 1,000 individuals in a population per year
Broad Spectrum Pesticide
A chemical designed to kill or control a wide variety of pests rather than a single species
Brownfield
Abandoned or underused industrial or commercial facility that is not redeveloped because of environmental contamination
CAFO
Industrial agricultural facility confining many animals in dense spaces for meat, milk, eggs, etc.
Cash crop
Crop grown specifically for sale and profit
City planning
Process of designing urban spaces to improve the quality of life for residents while ensuring growth and development
Composting
Process of decomposing organic materials and turning it into nutrient rich soil
Contour farming
Agriculture Technique of plowing and planting crops across a slope, following the lands natural elevation
CBR
total number of births in a population within a year
CDR
Total number of deaths per year within a population
Demographic transition model
4-5 stage framework showing how population growth shifts from high to low birth/death rates as a country industrializes
Demography
Scientific study of human populations specifically focusing on how they change over time
Density dependent factors
Environmental living pressures such as competition, predation, and disease that limit population growth more severely as the population density decreases
Density independent factors
Environmental non living events that limit population size regardless of crowded or sparse the population is
Desertification
The degradation of dry land ecosystems into deserts
Doubling time
The amount of time it takes for a population to double in size
Even aged stands
A group of trees with very little difference in age
Exponential Growth
Rapid accelerating population growth that occurs when resources are unlimited, resulting in a J shaped curve
Family planning
Controlling the number of births of children to reduce fertility rates and slow population growth
Feedlot runoff
Polluted water that flows off concentrated animal feeding operations during rain or snowfall
Fallow
Leaving fields unplowed in rotation
Fisheries
Populations of fish in a specific area harvested for commercial, recreational, or subsistence use.
GMO
Organisms whose DNA has been altered in a lab to introduce desirable traits
Green belt
Protected land surrounding and urban area designed to resist development of city infrastructure
Green revolution
Massive shift to industrialize agriculture designed to boost food production in developing nations
Herbicide
Chemical pesticides designed to kill or control unwanted plants in agricultural landscaping
Hydroponic
Sustainable soil free agricultural method where plants grow in nutrient rich water
Impervious surface
Hard human made surfaces (concrete, asphalt, rooftops) that prevent rain from soaking into the ground
Infant mortality rate
Number of deaths of children under one year old per 1000 births in a given year
Inorganic fertilizer
Man made nutrient rich compounds destined for rapid plant growth and high crop yields
Insecticide
Chemicals designed to kill repel or control insects damaging crops livestock or human health
IPM
multilayered approach to controlling agricultural or structural pests while minimizing risks to human health and the environment
IPAT
formula used to model his human activities impact the environment
MSY
Highest about of a resource (like crops or fish) that can be harvested without reducing the population or productivity of that resource for future generation
Microclimate
Specific spot (garden, park, valley) that has a different localized climate compared to the larger surrounding area
Monoculture
Agricultural practice of growing single crop species
Multiple use land
Public land that is managed to support several different (often competing) activities at the same time
Narrow spectrum pesticide
Chemical or agent designed to kill only a specific pest or a limited group of organisms
Natural pesticide
Substance derived from natural materials (plants, animals, bacteria or minerals) used to kill or repel control organisms considered pests
Nitrates
Compound of nitrogen and oxygen naturally, found in air, soil, waters and food
No- Till Agriculture
Sustainable farming method where crops are planted directly into the soil without plowing or turning it over
Organic fertilizer
Nutrient rich natural materials derived from plant or animal waste (manure, compost) used to enhance soil fertility
Overgrazing
Consumption of vegetation by livestock or wildlife at a faster rate than it can naturally grow back, exceeding the lands carrying capacity
Pest
Any organism that threatens human interests by causing damage to crops, livestock, ecosystems, or human health
Pesticide
Any natural or synthetic substance used to kill, repel, or control pests
Pesticide Treadmill
Cycle in agriculture where farmers are forced to use higher or more toxic pesticides due to the residence pests develop
Public lands
Areas of land and water owned collectively by the citizens of the United States and managed by federal state or local gov
Rodenticide
Type of pesticide designed to kill rodents
Ruminant
Herbivorous mammal with a specialized four compartment stomach that allows it to digest tough fibrous plant material
Seed bank
Facility that collects, cleans, and stores seeds from various plants
Seed tree cutting
Forestry method where most trees in an area are harvested
Selective cutting
Sustainable forestry method that involves harvesting only specific, mature, or diseased trees
Shelter belts
A line of trees or shrubs planted in a row to protect farmland, crops, livestock, and buildings
Shelterwood cutting
A forestry that removes mature trees in a series of two or more staged harvests over several years
Slash and burn
A farming method used in a tropical area where vegetation is cut down and burned to clear land with the resulting ash providing temporary nutrients for crops
Survivorship curve
A graph showing the proportion of individuals in a population surviving a each age from birth to death
Synergy
Interaction of two or more factors substances or organisms that produces a combined effect greater than the sum of their separate effects
The rule of 70
A simple formula used to estimate how many years it takes for a population or quantity to diubke based in a constant annual percentage growth rate
Type 1
Represents species with high survival rates during early and middle life, followed by a rapid increase in mortality amount older individuals
Type 2
Represents a population with a constant mortality rate throughout its entire lifespan
Type 3
Represents a population strategy characterized by extremely high early life mortality rates followed by relatively low stable death rates for the few individuals that survive to adulthood
Uneven aged stand
Forest management term for a stand of trees containing at least 3 or more distinct age classes all mixed together in the same area
Urban forestry
Planned and strategic management of trees and green spaces within cities, suburbs, and surrounding areas to provide environmental health and economic benefits to residents
Urbanization
Shift of human populations from rural areas to cities resulting in increased population density, the growth of built environments and significant land use changes