Scaling Diversity Flashcards
Who was the first person to measure life’s energy?
Lavosier (1777)
How did Lavosier measure life’s energy?
He put a guinea pig and a block of ice in a sealed chamber and found that the rate of ice melting was approximately equal to the about of carbon dioxide respired
What was Rubner (1880) among the first to realise?
That metabolism was not proportional to body mass. He thought geometric scaling had a role to play.
As cubes get bigger surface area and volume ______ but ________________
As cubes get bigger, surface area and volume INCREASE but DIFFERENTLY TO EACH OTHER
Large animals have proportionately __________ surface areas
Large animals have proportionately SMALLER surface areas
What did Rubner suggest in 1883?
That the scaling exponent of BMR should be 2/3 (0.67) due to the ration of SA/V
What was Rubner’s hypothesis in 1883?
Larger mammals will be unable to dissipate heat as they have a larger SA/V ratio so must have lower BMR
What are scaling relationships termed as?
Allometric relationships
How does temperature effect metabolism?
Metabolic rates increase exponentially with temperature
The larger the animal, the greater the home range and therefore…
The larger the animal, the lower the population density
What did Glazier hypothesise in 2008?
He came up with the Metabolic-level boundaries hypothesis –> different scaling exponents of metabolic rate depending upon the state of the animal
