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生物多样性-希尔数Hill number - 知乎 希尔将物种的 多度 （species richness）和 相对丰富度 （species relative abundances）整合为一类多样性测度指标，后来这些测度指标被称为希尔数（Hill numbers）或有效物种数（effective numbers of species） [1]希尔数用如下公式计算：
Diversity index - Wikipedia Diversity indices are statistical representations of different aspects of biodiversity (e g richness, evenness, and dominance), which are useful simplifications for comparing different communities or sites
Hill numbers everywhere. Does it make ecological sense? According to this proposal, Hill numbers have been widely adopted in ecological literature as the ultimate solution for diversity analysis regardless of the scientific question at hand In contrast, we believe that assuming a non-linear response of diversity measures to species addition is more suitable for many ecological questions
A guide to the application of Hill numbers to DNA‐based diversity . . . This article aimed to serve as a guide to implementing biodiversity assessment using the general statistical framework developed around Hill numbers into the analysis of systems characterized using DNA sequencing-based techniques (e g , diet, microbiomes and ecosystem biodiversity)
Hill s diversity: a general framework to address marine biodiversity . . . Hill (1973) proposed a general mathematical formulation of diversity indices that encompassed many of the well-known diversity indices used in ecology However, this general formulation has rarely been used in biodiversity studies of marine ecosystems where “simpler” measures such as species richness or Shannon index are often preferred
Hill numbers — hill • seqtime - GitHub Pages The Hill number is defined as D= (SUM p_i^q)^1 (1-q), for i from 1 to S, where S is the species number, p_i is the proportion of species i and q is the Hill order Since the Hill number involves a division by zero for q=1, please choose a sufficiently close q, such as 0 99999, when computing the Hill number for 1
en:div-ind [Analysis of community ecology data in R] This section will overview commonly used indices measuring the diversity of ecological communities (species richness, Shannon index, Simpson index) We will also introduce the measures of evenness, the concept of the effective number of species and the general framework of Hill numbers
R: Hills index of diversity - Hill numbers (D) Computes Hill's index of diversity (Hill numbers) on different classes of numeric matrices using a moving window algorithm x, window = 3, alpha = 1, base = exp(1), rasterOut = TRUE, np = 1, na tolerance = 1, cluster type = "SOCK", debugging = FALSE Input data may be a matrix, a Spatial Grid Data Frame, a SpatRaster, or a list of these objects
A conceptual guide to measuring species diversity The three forms of Hill diversity most commonly used by ecologists are species richness, and modifications of the traditional Shannon and Simpson indices The key insight of Hill (1973) was that these three measures are special cases of the same general equation (Box 4)