The more commonly used light-year is also presently defined to be equal to precisely 7007315576000000000â 31557600 light-seconds, since the definition of a year is based on a Julian year (not Gregorian year) of exactly 365.25 days, each of exactly 7004864000000000000â 86400 SI seconds.
Keystone resource a component of the environment utilized by individuals in the ecological community without which the individuals would not thrive or without which the ecological community structure would be negatively effected. Kin selection
Answered by The Community. Making the world better, one answer at a time. the jaguar is a keystone species by preying on animals that eat smaller animals. without the jaguar, many species would be extinct and a few would be dominant. this is why we must save the beautiful creature.hey are critical factors in ecological processes such as â¦ energy flow and nutrient cycling.If we can identify a keystone species and quantify its impact on its community then we can usually understand how the community functions as a whole.