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Liebig's law has been extended to biological populations (and is commonly used in ecosystem modelling).For example, the growth of an organism such as a plant may be dependent on a number of different factors, such as sunlight or mineral nutrients (e.g., nitrate or phosphate).
The identification of a factor as limiting is possible only in distinction to one or more other factors that are non-limiting. Disciplines differ in their use of the term as to whether they allow the simultaneous existence of more than one limiting factor (which may then be called "co-limiting"), but they all require the existence of at least one non-limiting factor when the terms are used.
Pushing on a string is a figure of speech for influence that is more effective in moving things in one direction than another – one can pull, but not push.. If something is connected to someone by a string, they can move it toward themselves by pulling on the string, but they cannot move it away from themselves by pushing on the string.
The pygmy mammoth is an example of insular dwarfism, a case of Foster's rule, its unusually small body size an adaptation to the limited resources of its island home.. A biological rule or biological law is a generalized law, principle, or rule of thumb formulated to describe patterns observed in living organisms.
The Limits to Growth (LTG) is a 1972 report [2] that discussed the possibility of exponential economic and population growth with finite supply of resources, studied by computer simulation. [3] The study used the World3 computer model to simulate the consequence of interactions between the Earth and human systems.
Paramecium aurelia and Paramecium caudatum grow well individually, but when they compete for the same resources, P. aurelia outcompetes P. caudatum.. Based on field observations, Joseph Grinnell formulated the principle of competitive exclusion in 1904: "Two species of approximately the same food habits are not likely to remain long evenly balanced in numbers in the same region.
A Framingham State biology professor is among several educators appearing in a TV advertisement pushing the CHERISH Act.
Bioeconomics (fisheries), the study of the dynamics of living resources using economic models; Bioeconomics (biophysical), the study of economic systems applying the laws of thermodynamics; Biological economics, the study of the relationship between human biology and economics; Bioeconomics, the social theory of Nicholas Georgescu-Roegen