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The ratio of total live births to total population in a specified community or area over a specified period of time. The birth rate is often expressed as the number of live births per 1,000 of the population per year.

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Ecology. a carnivore at the topmost level in a food chain that feeds on other carnivores; an animal that feeds only on secondary consumers.

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Secondary succession is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat. Examples include areas which have been cleared of existing vegetation

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an animal that feeds on carrion, dead plant material, or refuse.

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an animal that feeds on carrion, dead plant material, or refuse.

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a person, company, or country that makes, grows, or supplies goods or commodities for sale.

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Primary succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and other organisms usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited.

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Primary consumers are herbivores, feeding on plants. Secondary consumers, on the other hand, are carnivores, and prey on other animals. Omnivores, who feed on both plants and animals, can also be considered a secondary consumer.

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an animal that is hunted and killed by another for food.

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an animal that naturally preys on others

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all the inhabitants of a particular town, area, or country.

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an animal or person that eats food of both plant and animal origin.

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The function or position of a species within an ecological community. A species's niche includes the physical environment to which it has become adapted as well as its role as producer and consumer of food resources. See also competitive exclusion principle.