Population Dynamics
A branch of life sciences that examines how biological and environmental processes interact and influence the size and age compositions of populations.
With world population expected to pass nine billion by mid-century, solutions to water scarcity problems are not going to come easy.
population - (1) the whole number of inhabitants in a country, region or area; (2) a set of individuals having a quality or characteristic in common.
Population
aggregate of individuals of a biological species that are geographically isolated from other members of the species and are actually or potentially interbreeding.
Reference Condition ...
Population: all members of a species that live in a common area
Pore-water Salinity: salinity of the water in the soil
Predators: secondary consumers; living prey is consumed in whole or in part ...
population / soil
All the organisms living in the soil including plants and animals.
pore space ...
Population at Risk: A population subgroup that is more likely to be exposed to a chemical, or is more sensitive to the chemical, than is the general population.
population-at-risk
Persons who can and may develop an adverse health effect and who are potentially exposed to a substance under study.
Population
A group or number of people living within a specified area or sharing similar characteristics (such as occupation or age).
population density The number of individuals of a population per unit area.
population equivalent A means of expressing the amount, or strength, of organic matter in wastewater.
population growth = Different rates of for rich and poor countries
post-Kyoto program =
poverty = Condition of being in a state of deprivation, with inadequate resources and income ...
Population is the total number of organisms under study. Population density refers to the concentration of those organisms in any given area.
Population Model
A component of a stock assessment model, made up of formulations that describe how the population changes from one time period to the next.
P population equivalent
Definition (english only)
One population equivalent (p.e.) means the organic biodegradable load having a five-day biochemical oxygen demand (BOD5) of 60 g of oxygen per day.
overpopulation: when a country, or the world, has more people than it can support sustainably.
P
paradigm shift: a fundamental change in (a society's) belief/value system.
WORLD POPULATION GROWTH (Environmental Article #135)
CARL SAGAN HAD IT RIGHT -
BILLIONS AND BILLIONS AND BILLIONS
Putting World Population Growth Statistics in Context - and Finding Solutions to the Problem ...
Population: A discrete portion of a species that interbreeds. If isolated from other populations of the species for long periods of time, it may evolve into a separate race or species.
Predator: A carnivorous animal that preys on other animals.
Population of various microrganisms, trapped in a layer of slime and excretion products, attached to a surface.
Biological contaminants ...
Population Report
Periodic publication produced by grading services, indicating the quantity of coins that have been awarded a certain grade for each date an mintmark submitted.
ZERO POPULATION GROWTH
ACCUMULATION In the environmental sense, the term "accumulation" usually refers to the accumulation of substances in human or animal tissue or body fat.
Portion of population participating in a recycling program.
Source: Terms of the Environment
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Resident population: The number of persons who live in a State who consider the State their permanent place of residence. College students, military personnel, and inmates of penal institutions are counted as permanent residents.
species: a population of individuals that are more or less alike, and that breed and produce fertile offspring under natural conditions.
threatened: a species likely to become endangered if it is not protected.
1) Species whose population exists in equilibrium with resources and at a stable density. 2) A species that has a life history characterized by long life, long development time to reach maturity, low death rates, and few reproductive cycles per year.
Epidemiology The study of the occurrence and causes of health effects in human populations.
No Observable Adverse Effect Level (NOAEL) An exposure level at which there are no statistically or biologically significant increases in the frequency or severity of adverse effects between the exposed population and its appropriate control; ...
Capture - recapture A method for estimating the size of populations of mobile organisms (usually animals), in which one or more samples are captured, marked and released, ...
Maximum amount of exposure producing no measurable effect in animals (or studied humans) divided by the actual amount of human exposure in a population.
mathematical model. Model used during risk assessment to perform extrapolations.
adaptation The adjustment of an organism or population to a new or altered environment through genetic changes brought about by natural selection.
Some populations of trout are anadromous.
anaerobic (1) in the absence of oxygen; (2) pertaining to organisms capable of respiration in the absence of oxygen.
angiosperms "vessels for seeds." Flowering plants.
The Exxon Valdez oil spill off the Coast of Prince Edward Sound in 1990, while an environmental disaster of epic proportions, provided a fascinating example of the ability of endemic populations of microorganisms to cleanse the environment, ...
Some species have discontinuous ranges meaning they consist of several populations. In some species, individuals differ based on the population they came from.
The basic units for study are the species (all the organisms which are capable of interbreeding), population (all of the members of a species occupying a certain geographical area) and community (number of populations interacting within a certain ...
The problem of acid rain not only has increased with population and industrial growth, it has become more widespread.
High End Exposure (dose) Estimate: An estimate of exposure, or dose level, received anyone in a defined population that is greater than the 90th percentile of all individuals in that population, ...
An estimate of exposure, or dose level received anyone in a defined population that is greater than the 90th percentile of all individuals in that population, but less than the exposure at the highest percentile in that population.
The changes in climate will affect everyone, but some populations will be at greater risk. For example, countries whose coastal regions have a large population, such as Egypt and China, may see whole populations move inland to avoid flood risk areas.
Habitat: The place where a population (e.g. human, animal, plant, microorganism) lives and its surroundings, both living and non-living. It is its arrangement of food, water, shelter or cover and space suitable to an animal's needs.
This is measured by an increase in the total value of goods produced by a country in a year (GDP), or by the amount of money made by the population (national income). An economy can grow without benefiting everyone in it.
Maximum Exposure Range: Estimate of exposure or dose level received by an individual in a defined population that is greater than the 98th percentile dose for all individuals in that population, ...
EPA (with uncertainty spanning perhaps an order of magnitude) of the daily exposure to the human population, (including sensitive subpopulations) that is likely to be without deleterious effects during a lifetime.
Habitat: The place where a population lives, including its living and non living surroundings.
Hard Water: Alkaline water containing dissolved salts that interfere with some industrial processes and prevent soap from lathering.
A 95 percent confidence interval means that in repeated samples from the same population, 95 percent of the time the true underlying population parameter will be contained within the lower and upper bounds of the interval.
Community: In ecology, an assemblage of populations of different species within a specified location in space and time.
The algae population is divided up into green algae and blue algae, of which the blue algae are very damageable to human health. Excessive algae growth may cause the water to have undesirable odors or tastes.
Activated sludge An active population of microorganisms used to treat wastewater, or the process in which the organisms are employed.
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Ecological Footprint - The area of land and water needed to produce the resources to entirely sustain a human population and absorb its waste products with prevailing technology.
UNFPA: United Nations Population Fund
UNICEF: United Nations Children's Fund
UNIDO: United Nations Industrial Development Organization ...
This was associated with a population explosion of rodents and their predators but may be partially blamed on breakdowns in governmental vaccination and rodent control programs.
ENDANGERED SPECIES ACT: The federal law that sets forth how the United States will protect and recover animal and plant species whose populations are in dangerous decline or close to extinction.
Environmental Equity (Environmental Justice): Environmental protection for all citizens so that no segment of the population, regardless of race, ethnicity, culture, or income, ...
Radionuclides
Known to cause cancer in humans.
Based on studies of populations exposed to extremely high levels, i.e., atomic bomb and Chernobyl incident survivors.
Transformation of one chemical to others by populations of microorganisms in the soil.
Boring ...
Risk - A measure of the probability of an adverse effect on a population under a well-defined exposure scenario.
Prevalence: The percentage of individuals within a population having a disease.
Reference dose (RfD)-An exposure level defined by the Environmental Protection Agency as "a numerical estimate of a daily oral exposure to the human population, including sensitive subgroups such as children, ...
Epidemiology: A branch of medical science that deals with the incidence, distribution, and control of disease in a population; the sum of the factors controlling the presence or absence of a disease or pathogen.
It is the process in which aerobic microbes break the composition of organic contaminants for survival and regenerating their population.
Agricultural Land ...
Endemic: Something peculiar to a particular people or locality, such as a disease which is always present in the population.
Emissions also vary by state since they are based on the many factors such as the types of fuel used to generate electricity, the total population of a state, and the amount of (and distance traveled by) commuters.
 See also: Environment, Environmental, Water, Waste, Reduce
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