Keystone species mussel population explodes uncontrollably, driving out most other species. These creatures need not be apex predators. Sea stars are prey for sharks, rays, and sea anemones. Sea otters are prey for orca. The jaguar, whose numbers in Central and South America have been classified as near threatened, acts as a keystone predator by its widely varied diet, helping to balance the mammalian jungle ecosystem with its consumption of 87 different species of prey. The lion is another keystone species. Keystone mutualists are organisms that participate in mutually beneficial interaction and the loss of which would have a profound impact upon
Barbary (novel) United States, although this is not stated, nor what its relationship with the UTNA is. It is mentioned that the space settlements have representatives at the UN. The novel contains many details about aspects of life in space and on the space station, especially on the effects of zero gravity and spin gravity. Barbary (novel) Barbary is a 1986 science fiction novel written by Vonda McIntyre about an orphan and her cat moving to a space station. It is considered one of the best science fiction stories of the decade for children and young adults. Barbary, a twelve-year-old girl, is