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Bergmann's rule is an ecogeographical rule that states that, within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions. The rule derives from the relationship between size in linear dimensions meaning that both ...
In 1847, Carl Bergmann published his observations that endothermic body size (i.e. mammals) increased with increasing latitude, commonly known as Bergmann's rule. [9] His rule postulated that selection favored within species individuals with larger body sizes in cooler temperatures because the total heat loss would be diminished through lower surface area to volume ratios. [8]
A study by Frederick Foster and Mark Collard found that Bergmann's rule can be applied to humans when the latitude and temperature between groups differ widely. [12] Allen's rule is a biological rule that says the limbs of endotherms are shorter in cold climates and longer in hot climates. Limb length affects the body's surface area, which ...
Bergmann's rule states that body mass increases with colder climate, as here in Swedish moose. [7]Allen's rule states that the body shapes and proportions of endotherms vary by climatic temperature by either minimizing exposed surface area to minimize heat loss in cold climates or maximizing exposed surface area to maximize heat loss in hot climates.
Carl Georg Lucas Christian Bergmann (18 May 1814 – 30 April 1865), also known as Karl Georg Lucas Christian Bergmann, was a German anatomist, physiologist, and biologist. He developed Bergmann's rule (that populations and species of animals of larger size are found in colder environments). [ 1 ]
Ecogeographic rules describe similar patterns of variation within and across species and their correlation to biogeography, particularly latitude. While they are described as rules there are often many exceptions to them.
Restoring the Rule of Law, Federalism, and Economic Growth by Reviewing the Waters of the United States Rule. Instructs the Environmental Protection Agency and Army Corps of Engineers to review and reconsider an Obama-era clean water rule that clarifies which waterways should be protected under the Clean Water Act. Read Order Read article
English: Bergmann’s Rule is an ecologic principle which states that as latitude increases the body mass of a particular species increases. The data are taken from a Swedish study investigating the size of moose as latitude increases as shows the positive relationship between the two, supporting Bergmann’s Rule.