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Biological Diversity & Conservation
Biological Diversity & Conservation & Population Biology
40
Biology
9th Grade
09/27/2012

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Cards

Term
What is biodiversity?
Definition
The diversity of species in a specific area.
Term
What is extinction?
Definition
It is the disappearance of a species after the last one dies.
Term
What is an endangered species?
Definition
It is when the number of a species becomes so low that extinction is a possibility.
Term
What is a threatened species?
Definition
It is when the population of a species is likely to become endangered.
Term
What is the edge effect?
Definition
The diffferent conditions along the boundaries of a ecosystem.
Term
What is habitat fragmentation?
Definition
The separation of wilderness areas from other wilderness areas.
Term
What are some of the activities that threaten organisms with extinction?
Definition
habitat loss, habitat fragmentation, edge effect,habitat degradation, water pollution, land polution, acid precipitation, and the introduction of exotic species to an ecosystem.
Term
What is habitat loss?
Definition
It is the destruction of existing ecosystem to create farmland, or land to build on.
Term
What is habitat degradation?
Definition
It is the damage to a habitat through polution.
Term
What are the three types of pollution?
Definition
land,air, and air pollution.
Term
What is acid precipitation?
Definition
rain, snow, sleet, and fog with low pH values.
Term
What is the ozone layer?
Definition
It is a layer of ozone that absorbs some of the ultraviolet waves that strike the atmosphere that reduces the ultraviolet radiation that hits earths atmosphere.
Term
What are some air pollutants?
Definition
Sulfur dioxide from coal mines, nitrogen oxides from automobiles combine with water vapor in the air to form acidic dropslets of water vapor.
Term
What are some water pollutants?
Definition
Excess fertilizers, animal waste, excess algae, silt from eroded soils, detergents, heavy metals, and industrial chemical, abandoned drift nets in the ocean.
Term
What are some land pollutants?
Definition
Garbage, solid waste, cans, bottles, plastic, metals, dirt and spoiled food.
Term
How do exotic species hurt the environment?
Definition
People bring new species into an ecosystem and the species can cause problems for existing species.
Term
What is conservation biology?
Definition
It is the study and implementation of methods to protect biodiversity.
Term
What are natural resources?
Definition
They are the useful parts of the environment that are necessary for living organisms.
Term
What law was formed to help protect the environment?
Definition
In 1973 the U. S Endangered Species Act became law to help protect the endangered species.
Term
What is a habitat corridor??
Definition
It is a protected corridor of land that allow the migration of organisms from one wilderness area to another.
Term
What is sustainable use?
Definition
It is a philosophy that strives to use natural resources in ways that will benefit people and maintain the ecosystem.
Term
What are reintroduction programs?
Definition
It is a program that reintroduces and release organisms into areas that they once lived.
Term
What is an organism in captivity?
Definition
When it is being held by people but not in the wild.
Term
What is a population?
Definition
A group of organisms all of the same species that live in a specific area.
Term
What type of curve does a population show on a graph?
Definition
J curve
Term
What is exponential growth?
Definition
It means that as a population gets larger, it also grows at a faster rate.
Term
What does expoential growth cause?
Definition
Unchecked growth of a population.
Term
What is carrying capacity?
Definition
The number of organisms of one species that an area can support indefinitely.
Term
What is life-history pattern?
Definition
It is an organisms reproductive pattern.
Term
Describe organisms with a rapid life history pattern.
Definition
They have a small body, mature rapidly, reproduce early, and have a short life span.
Term
What is a slow life-history pattern?
Definition
Organisms that produce and mature slowly, and are long-lived. They maintain populations sizes at or near carrying capacity.
Term
What are some density-dependent factors of a population?
Definition
Disease,competition, predators, parasites, and food.
Term
What are density-independent factors?
Definition
They are abiotic factors such as volcanic eruptions, temperature, storms, floods, drought, chemical pesticides, and major habitat disruptions.
Term
Do both dependent and independent density factors affect populations?
Definition
YES
Term
What are some organism interactions that limit population size?
Definition
Predators, competition within the population, crowding and stress within the population.
Term
What is demography?
Definition
The study of human population size, density and distribution, movement, and its birth and death rates.
Term
What is the birthrate?
Definition
The number of live births per 1000 population in a given year.
Term
What is the death rate?
Definition
The number of deaths per 1000 population in a given year.
Term
What is the doubling time?
Definition
It is the time needed for a population to double in size.
Term
What is age structure?
Definition
It is the proportion of the population that are in different age levels.
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