| A | B |
|---|
| Acid Rain | rain contatining nitric and sulfuric acids |
| Age-Structure Diagram | graph of the numbers of males and females within different age groups of a population |
| Agriculture | the practice of farming |
| Aquaculture | the raising of aquatic organisms for human consumption |
| Biodiversity | biological diversity; the sum total of the variety of organisms in the biosphere |
| Biological magnification | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web |
| Carrying Capacity | largest number of indiciduals of a propulation that a given enviroment can support |
| Conservation | wise management of natural resources including the preservation of habitats and wildlife |
| Deforestation | destruction of forests |
| Demography | scientific study of human populations |
| Demoraphic Transition | change in a population from high birth and death rates to low birth and death rates |
| Density-Dependant Limiting Factor | limiting factor that depends on population size |
| Density-Independent Limiting Factor | limiting factor that affects all populations in similar ways, regardless of population size |
| Desertification | in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert |
| Ecosystem Diversity | varitey of habitats, living communities, and ecological processes in the living world |
| Emigration | movement of individuals OUT of an area |
| Endangered Species | species whose population size is rapidly declining and will become extinct if the trend continues |
| Exponential Growth | growth pattern in which the individuals in a population reproduce at constant rate |
| Extinction | disappearance of a species from all parts of its geofraphical range |
| Genetic Diversity | sum total of all the different forms of genetic information carried by all organisms living on Earth today |
| Global Warming | Increase in the average temperature of Earth |
| Green Revolution | the development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops |
| Habitat Fragmentation | splitting of ecosystems into small fragments |
| Immigration | movement of individuals INTO an area occupied by an existing population |
| Invasive species | plants and animals that have migrated to places where they are not native |
| Limiting Factor | factor that causes the growth of a population to decrease |
| Logistic Growth | growth pattern in which a population's growth rate slows or stops following a period of exponential growth |
| Monoculture | farming strategy in which large fields are planted with a single crop, year after year |
| Nonrenewable Resource | resource that cannot be replenished by natural processes |
| Ozone layer | atmospheric layer in which ozone gas is relatively concentrated |
| Pollutant | harmful material that can enter the bioshphere through the land, air, or water |
| Population Density | number of individuals per unit of area |
| Predator-Prey Relationship | mechanism of population control in which a population is regulatied by predation |
| Renewable Resource | resource that can regenrate quickly and that is replaceable |
| Smog | mixture of chemicals that occurs as gray-brown haze in the atmoshphere |
| Soil Erosion | wearing away of surgace soil by water and wind |
| Species Diversity | number of different species in the biosphere |
| Sustainable Development | using natural resources at a rate that does not deplete them |
