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