Rutgers researchers have found that life on Earth predominantly comes in the largest and smallest sizes, with the planet’s biomass concentrated in organisms at either end of the size spectrum. The surprising discovery was made after a five-year study analyzing data on the size and biomass of every type of living organism. The pattern favoring large and small organisms held across all species types and was more pronounced in land-based organisms than in marine environments. The study highlights the importance of microbes and trees as the “silent partners” that recycle nutrients and replenish the air on Earth.
Rutgers researchers conduct survey on the body sizes of Earth’s organisms.
Life may come in all shapes and sizes, but in nature, the most extreme size ranges predominate, according to Rutgers researchers.
A survey of body sizes of Earth organisms, published Wednesday, March 29, in the science journal PLoS ONE, shows that the planet’s biomass – the material that makes up all living organisms – is concentrated in organisms at either end of the size spectrum.
“This conclusion – that life on earth comes packaged predominantly in the largest and smallest sizes – was a discovery that surprised us,” said Malin Pinsky, an associate professor in the Department of Ecology, Evolution and Natural Resources in the Rutgers School of Environmental and Biological Sciences (SEBS) and an author of the study. “Sometimes it seems like mosquitoes or flies or ants must run the world, and yet, when we did the numbers, we found that our world is dominated by the microbes and the trees. These are the silent partners that recycle the nutrients and replenish the air all around us.”
To obtain the results, researchers spent five years compiling and analyzing data about the size and biomass of every type of living organism on the planet – from tiny one-celled organisms such as soil archaea and bacteria to large organisms such as blue whales and sequoia trees. They found that the pattern favoring large and small organisms held across all types of DOI: 10.1371/journal.pone.0283020
