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Body mass-population density scaling at the local scale: does the energy equivalence rule hold for forest mammals?

100%

Hoste-Danylow A., Danylow J., Ulrich W.

Polish Journal of Ecology

2013

tom 61

nr 4

The energy equivalence rule assumes that the scaling of population density with body mass is inversely proportional to the scaling of individual metabolic rate. As a result, the total population energy use, calculated as the product of individual metabolic rate and population density, is independent of body mass. Here we evaluated the validity of this rule at the scale of a single community of mammals. Strong linear dependencies were found between log-transformed individual metabolic rate and log-transformed body mass as well as between body mass and density. The slopes of these relationships are close to the predicted |3/4| value and, in accordance with the energy equivalence rule, exhibit opposite values. The results however supported this rule only at the scale of the whole community. When small and large species were considered separately, population energy use increased with body mass. Analyzing these two groups separately strongly decreased the range of body mass considered. Body mass range seems to be a critical factor to find support for the energy equivalence rule at the scale of a single community.

Energy consumption in non-reproducing adults of the eastern hedgehog Erinaceus concolor

84%

Krol E.

Acta Theriologica

1994

tom 39

nr 4

Energy balance and body mass changes were studied in non-reproducing adult eastern hedgehogs Erinaceus concolor (Martin, 1838) during an 8-day feeding trial. The amount of energy consumed by the hedgehogs that maintained constant body mass averaged 0.74 kJ x g_1 x day-1. The energy equivalent of body mass loss amounted to 15.12 kJ x g-1, and that of body mass gain was 25.18 kJ energy consumed x g~ . If the energy contents of body mass gained and lost were the same, biomass production efficiency was 72.2%.

Ograniczanie wyników

1 Acta Theriologica

1 Polish Journal of Ecology

1 Danylow J.

1 Hoste-Danylow A.

1 Krol E.

1 Ulrich W.

1 2013

1 1994

Wyniki wyszukiwania

Body mass-population density scaling at the local scale: does the energy equivalence rule hold for forest mammals?

Energy consumption in non-reproducing adults of the eastern hedgehog Erinaceus concolor