TABLE 1

Description of nine possible outcomes of cogrowth per microbea

DescriptionType
The microbe grows slower in the presence of the other microbe, whereas the other microbe grows faster.Parasitism
The microbe grows faster in the presence of the other microbe, whereas the other microbe grows more slowly.Parasitism
The microbe's growth is not affected, whereas the other microbe grows faster.Commensalism
The microbe grows faster in the presence of the other microbe, whereas the other microbe's growth is not affected.Commensalism
Neither microbe affects the growth of its partner significantly.Neutralism
The microbe grows more slowly in the presence of the other microbe, whereas the other microbe's growth is not affected.Amensalism
The microbe's growth is not affected, whereas the other microbe grows more slowly.Amensalism
Both microbes grow more slowly when they are grown together than when they are grown separately.Competition
Both microbes achieve a significantly higher growth rate when they are grown together than when they are grown separately.Mutualism
  • a A difference in growth rate of at least 10% compared with the growth rate of the microbe grown separately was considered significant.