Sahney et al. stated the connection as "As taxonomic diversity has increased, there have been incentives for tetrapods to move into new modes of life, where initially resources may seem unlimited, there are few competitors and possible refuge from danger.
Sahney et al. estableceron a conexión da seguinte maneira: "A medida que se incrementaba a diversidade taxonómica, houbo incentivos para os tetrápodos para moverse a novos modos de vida, nos cales os recursos inicialmente poden parecer ilimitados, hai poucos competidores e posible refuxio contra os perigos.