Which regulations have populations with known as the power?
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Which regulations have populations with known as the power?
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Explanation:
The Never-Ending Debate
Population regulation is one of the central organizing themes in ecology (Dennis and Taper, 1994; Murdoch, 1994). Yet, ever since the concept of population regulation by density-dependent mechanisms was formulated by Nicholson (1933), regulation has been the subject of an acrimonious debate (or actually a number of debates about its various aspects and implications), which continues to this very day.
In 1949, Charles Elton wrote: “It is becoming increasingly understood by population ecologists that the control of populations, i.e., ultimate upper and lower limits set to increase, is brought about by density-dependent factors” (p. 19). Subsequent history showed that this statement was somewhat premature. In a very influential book, Andrewartha and Birch argued that density-dependent factors “are not a general theory because, as we have seen … they do not describe any substantial body of empirical facts” (Andrewartha and Birch, 1954, p. 649). Andrewartha and Birch then proposed an alternative theory of population limitation by density-independent factors. The arguments of Andrewartha and Birch set the stage for the ensuing controversies, which could be grouped around two general themes, one logical and the other empirical: (1) What does population regulation mean, and are density-dependent factors a necessary condition for regulation? (2) Can we detect density-dependent regulation in real populations, and if yes, with what frequency does it operate?
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Explanation:
PHOTO SYNTHESIS IS USED BY PLANTS FOR FOOD
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