Faculty of Science, Engineering and Computing, Kingston University London, United Kingdom.
Department of Physical Chemistry, The Hebrew University, Jerusalem 91904, Israel.
Phys Biol. 2021 Oct 11;18(6). doi: 10.1088/1478-3975/ac264e.
We introduce here a new index of diversity based on consideration of reasonable propositions that such an index should have in order to represent diversity. The behaviour of the index is compared with that of the Gini-Simpson diversity index, and is found to predict more realistic values of diversity for small communities, in particular when each species is equally represented and for small communities. The index correctly provides a measure of true diversity that is equal to the species richness across all values of species and organism numbers when all species are equally represented, as well as Hill's more stringent 'doubling' criterion when they are not. In addition, a new graphical interpretation is introduced that permits a straightforward visual comparison of pairs of indices across a wide range within a parameter space based on species and organism numbers.
我们在这里引入了一个新的多样性指数，该指数基于这样的合理假设，即多样性指数应该能够代表多样性。我们比较了该指数与基尼-辛普森多样性指数的行为表现，发现该指数在预测小群落的多样性值时更为现实，特别是当每个物种的数量相等且群落较小时。该指数正确地提供了一种真实多样性的度量，当所有物种的数量相等时，该度量与所有物种的物种丰富度相等，并且在它们不相等时，也满足希尔更严格的“翻倍”标准。此外，我们还引入了一种新的图形解释，可以在基于物种和生物数量的参数空间内，对广泛范围内的两个指数进行直观的比较。
