what is the biggest difference between primary and secondary succession?
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Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field.
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A natural ecosystem has a diverse amount of species and plants, whereas artificial ecosystems are limited. Natural ecosystems are self-sustaining and result from spontaneous natural reaction, while artificial ecosystems require the assistance of humans. ... Without humans, this ecosystem could not sustain itself.
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Second-growth forest: A stand of trees resulting from secondary ecological succession. 3. Tree plantation: A managed forest containing only one or two species of trees that are all of the same age.
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GPP is larger because it is the total amount of biomass accumulated during photosynthesis but Net primary productivity is obtained after the loss of some amount of GPP. So GPP is larger than NPP. ... In any ecosystem number of producers are more than consumers so primary productivity is larger than secondary productivity.
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Differences between primary and permanent teeth. ...  Primary teeth are smaller in size when compare to permanent teeth.  1st tooth to erupt into the oral cavity is mandibular incisor whereas in permanent teeth it is the mandibular first molar.
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Composition. The next difference between primary and permanent teeth is that the enamel layer on the primary teeth is much thinner than that in permanent teeth. This difference between deciduous and permanent teeth is important because thinner enamel allows cavities to spread quickly.
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Primary and secondary tillage Primary tillage is usually conducted after the last harvest, when the soil is wet enough to allow plowing but also allows good traction. ... Secondary tillage is any subsequent tillage, in order to incorporate fertilizers, reduce the soil to a finer tilth, level the surface, or control weeds.
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Primary metabolites are compounds that are directly involved in the growth and development of a plant whereas secondary metabolites are compounds produced in other metabolic pathways that, although important, are not essential to the functioning of the plant.
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Primary forest refers to untouched, pristine forest that exists in its original condition. This forest has been relatively unaffected by human activities. ... Generally, secondary forest is characterized (depending on its level of degradation) by a less developed canopy structure, smaller trees, and less diversity.
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A dominant species in an ecosystem is the most abundant species present. It makes up the highest percentage of the total biomass in the system. A keystone species is one that has the greatest effect on all of the other species in an ecosystem.
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['energy flow and nutrient cycles ( photosynthesis , food webs, decomposition webs)', 'sediment transport and soil formation.', 'the water cycle.', 'reproduction/ regeneration mechanisms.', 'natural disturbances (fires, floods, storms)', 'succession.']
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Primary forests are forests of native tree species, where there are no clearly visible indications of human activities and the ecological processes are not significantly disturbed. Secondary forests regenerate on native forests, which have been cleared by natural or man made causes, such as agriculture or ranching.
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Secondary coasts are formed by more ocean driven processes like wave erosion or growth of a coral reef. ... Primary coasts include land-deposition coasts, formed when rivers flow into the ocean and sediment accumulates along a wide shelf.
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Community Reversion to Succession And if those disturbances are repeated, forest succession may not reach the point of a climax community. Climate change, natural events such as forest fire, agriculture and deforestation cause this reversion.
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The two types of xylem, primary and secondary, perform the same function but are categorized by the type of growth that they are formed with.
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Dominant species is the most abundant species by biomass. A keystone species is one who exercises an indirect regulating effect on other species distribution within the community.
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Primary research is information gathered through self-conducted research methods, while secondary research is information gathered from previously conducted studies. Secondary research is usually where most research begins.