Centre for Ecological Sciences and Centre for Theoretical Studies, Indian Institute of Science, 560 012, Bangalore, India.
Oecologia. 1989 Mar;80(1):140-1. doi: 10.1007/BF00789944. Epub 2013 Mar 13.
A desirable property of a diversity index is that it be a convex function of the proportions of different species that constitute a community.N 2, a diversity index belonging to the Hill's series of diversity indices and which is equivalent to the reciprocal of Simpson's diversity index violates this requirement when the proportion of one of the species is close to 1. Recommendations ofN 2 as the best possible index of diversity therefore need to be examined judiciously.
一个多样性指数的理想属性是，它应该是构成群落的不同物种比例的凸函数。N 2 是希尔多样性指数系列中的一个多样性指数，它等同于辛普森多样性指数的倒数，当其中一个物种的比例接近 1 时，这个要求就会被违反。因此，将 N 2 作为最佳多样性指数的建议需要审慎考虑。
