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As opposed to the first, primary succession,secondary succession is a process started by an event (e.g. forest fire, harvesting, hurricane) that reduces an already established ecosystem (e.g. a forest or a wheat field) to a smaller population of species, and as such secondary succession occurs on preexisting soil

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Primary succession occurring over time. ... Primary succession is one of two types of biological and ecologicalsuccession 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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Ecological succession, the process by which the structure of a biological community evolves over time. Two different types of succession—primary and secondary—have been distinguished.

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The study of heredity, or how the characteristics of living things are transmitted from one generation to the next. Every living thing contains thegenetic material that makes up DNA molecules. This material is passed on when organisms reproduce. The basic unit of heredity is the gene.

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Evolution is change in the heritable characteristics ofbiological populations over successive generations.Evolutionary processes give rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules.

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the branch of biology dealing with the relations and interactions between organisms and their environment, including other organisms. 2. Also called human ecology. the branch of sociology concerned with the spacing and interdependence of people and institutions.

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Eutrophicationis a process whereby water bodies, such as lakes, estuaries, or slow-moving streams receive excess nutrients that stimulate excessive plant growth (algae, periphyton attached algae, and nuisance plants weeds).

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Predation. ... In an ecosystem, predation is a biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked).

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(bioinvasion impacts or biopollution) is a term that defines adverse effects of invasive alien species (IAS) on quality of aquatic and terrestrial environment.

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any class of organisms that occupy the same position in a food chain, as primary consumers, secondary consumers, and tertiary consumers. trophic level in Science Expand. trophic level. ... ◇ The rate at which energy is transferred from one trophic level to the next is called the ecological efficiency.

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is an animal that is at the top of the food chain. These animals mainly eat or prey on animals below them on the food chain, such as tertiary and secondary consumers.

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Meat ants feeding on a cicada; some species can prey on individuals of far greater size, particularly when working cooperatively. In an ecosystem, predation is abiological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked).

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A feeding hierarchy in which organisms in an ecosystem are grouped into trophic (nutritional) levels and are shown in a succession to represent the flow of food energy and the feeding relationships between them.

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(ecology) A graphical model showing the interconnecting food chains in an ecological community. Supplement. A food web is a graphical model depicting the many food chains linked together to show the feeding relationships of organisms in an ecosystem.

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When a natural habitat, such as a forest or wetland, is altered so dramatically that it no longer supports the species it originally sustained. Plant and animal populations are destroyed or displaced, leading to a loss of biodiversity. ... Note: Habitat destruction is taken as synonymous with habitat loss.

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is defined as that portion of the electromagnetic spectrum between X-rays and visible light, between 40 and 400 nm wavelength. Electromagnetic spectrum. From left to right, gamma rays, xrays, UV light, visible light, infrared light, microwave, radio waves.

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noun, Ecology. ... a carnivore at the topmost level in a food chain that feeds on other carnivores; an animal that feeds only on secondary consumers.tertiary consumer in Science Expand.

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An organism that largely feeds on primary consumers. Supplement. For instance, carnivores feeding on herbivores or detritivores are called secondary consumers of the food chain. Compare: primary consumer, tertiary consumer.

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is the living organism that eats the producers, which are the plants. This means that all organisms that are classified as herbivores, also called plant-eaters, fall into the category of primary consumers.

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An autotrophic organism capable of producing complex organic compounds from simple inorganic molecules through the process of photosynthesis (using light energy) or through chemosynthesis (using chemical energy)

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the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.

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a large naturally occurring community of flora and fauna occupying a major habitat, e.g., forest or tundra.

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A group of individuals of the same species occupying a particular geographic area.Populations may be relatively small and closed, as on an island or in a valley, or they may be more diffuse and without a clear boundary between them and a neighboring population of the same species.

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are defined by the network of interactions among organisms, and between organisms and their environment, they can be of any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).

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a single animal or plant, esp as distinct from a species. a single member of a compound organism or colony.

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Community, also called biological community, in biology, an interacting group of various species in a common location.

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Community Ecology PowerPoint and Notes 1