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In reproduction, however, trees typically produce thousands of offspring and disperse them widely, traits characteristic of r-strategists.Similarly, reptiles such as sea turtles display both r- and K-traits: although sea turtles are large organisms with long lifespans (provided they reach adulthood), they produce large numbers of unnurtured offspring.As the name implies, r-selected species are those that emphasize high growth rates, typically exploit less-crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood (i.e., high r, low K).A typical r species is the dandelion Taraxacum genus.Traits that are thought to be characteristic of K-selection include large body size, long life expectancy, and the production of fewer offspring, which often require extensive parental care until they mature.Organisms whose life history is subject to K-selection are often referred to as K-strategists or K-selected.Although some organisms are identified as primarily r- or K-strategists, the majority of organisms do not follow this pattern.
There is little advantage in adaptations that permit successful competition with other organisms, because the environment is likely to change again.
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