November 19, In 1969, CSS Hudson Glide through the cold waters of Halifax Harbor, Nova Scotia, into the open ocean.What the research ship is working on Many marine scientists on board Considered to be the last great and unknown ocean voyage: the first complete voyage to the Americas. The ship is heading to Rio de Janeiro, where it will pick up more scientists before crossing Cape Horn (the southernmost point of the Americas), then head north across the Pacific Ocean and return to the Port of Halifax through the frozen northern waterway.
Along the way, Hudson It will stop frequently so that its scientists can collect samples and make measurements.One of the scientists, Ray Shelton, boarded Hudson In Valparaiso, Chile. Sheldon, a marine ecologist at the Bedford Institute of Oceanography in Canada, is fascinated by the seemingly ubiquitous micro-plankton in the ocean: how far and how far do these tiny creatures spread?To find out, Sheldon and his colleagues dragged buckets of seawater to HudsonThe laboratory used a plankton counting machine to calculate the size and number of organisms they found.
Living in the ocean, They found, Following a simple mathematical rule: the abundance of an organism is closely related to its size. In other words, the smaller the organism, the more organisms you will find in the ocean. For example, krill is a billion times smaller than tuna, but their population is also a billion times larger than tuna.
Even more surprising is how precisely this rule seems to work. When Sheldon and his colleagues organized their plankton samples by orders of magnitude, they found that every size of the scaffold contained organisms of exactly the same quality. In a bucket of sea water, one third of the plankton mass is between 1 and 10 microns, another third is between 10 and 100 microns, and the last third is between 100 microns and 1 mm. Each time they moved up a large group, the number of individuals in that group dropped 10 times. The total mass remains the same, while the size of the population has changed.
Shelton believes that this rule may govern all life in the ocean, from the smallest bacteria to the largest whales. Facts have proved that this hunch is correct. As we all know, Sheldon spectra are also observed in plankton, fish and freshwater ecosystems. (Actually, a Russian zoologists have observed Sheldon had the same pattern in the soil 30 years ago, but his discovery hardly attracted people’s attention). Eric Galbraith, professor of earth and planetary sciences at McGill University in Montreal, said: “This seems to indicate that no size is better than any other size.” “Everyone has cells of the same size. Basically, for a cell Say, your body size is not important, you just tend to do the same things.”