Robert T. Paine defined one type of this entity as one whose impact on its ecosystem is disproportionately large relative to its abundance, their keystone type. r-selected ones are replaced by K-selected ones through ecological succession. One type occurs when they are distributed in a circular pattern geographically and is the ring type. (*) Peripatric, sympatric and allopatric are all types of a process that gives rise 
Robert T. Paine defined one type of this entity as one whose impact on its ecosystem is disproportionately large relative to its abundance, their keystone type. r-selected ones are replaced by K-selected ones through ecological succession. One type occurs when they are distributed in a circular pattern geographically and is the ring type. (*) Peripatric, sympatric and allopatric are all types of a process that gives rise to new ones. Organisms belonging to the same one are known as conspecific. For 10 points, name this class of animals that is capable of interbreeding and producing fertile offspring, the smallest unit of taxonomic rank.
Robert T. Paine defined one type of this entity as one whose impact on its ecosystem is disproportionately large relative to its abundance, their keystone type.
{species}