Sentence examples for marginal diversity from inspiring English sources

If this loss is to be reduced, it is sufficient to include those three to five breeds with the highest marginal diversity in a conservation scheme.

Weitzman [ 13] introduced the concept of marginal diversity to account for the change in expected diversity of a metapopulation (for a given period of time) when the extinction probability of a sub-population increases [ 12].

The Gini-Simpson relative marginal diversity of a category is increasing when probability of a category is approaching to 1 2. In case that a selected attribute has only two categories, then Gini-Simpson relative marginal diversities of these two categories have the same value.

We define the relative self- diversity of the i-th category as (16) R R f, i p = R f, i p / H f p and the relative marginal diversity of the i-th category we define as (17) R H f, i p = H f, i p / H f u ˜, where u ˜ = 1 2, 1 2. Comparing diversities on the sample of 110 Czech narrative medical reports and 1119 Czech structured medical reports we used diversities of the Gini- Simpson type.

In this case we formally work with two categories (dichotomy) with probabilities p i and 1- p i. Then marginal f-diversity of the i-th category is defined as (15) H f, i p = p i 2 f 1 / p i + 1 - p i f 1 / 1 - p i + 2 f 0 p i 1 - p i. Next, we introduce relative self diversity and relative marginal diversity.

The methodology combines core set diversity measures with a stochastic method for the estimation of expected future diversity and breed marginal diversities.

We estimated probabilities of MDMC categories for all attributes from narrative and structured medical reports without missing observations and calculated estimates of Gini-Simpson diversities (Table 2), Gini-Simpson self diversities and relative marginal diversities (Table 3).

Thus, with each new addition to the diverse subset the marginal gain in diversity decreases, which is consistent with the study done in previous work [27].

Comparing the vascular plant species numbers from large-scale surveys (sampling areas about 35 km2), like the floristic mapping of Austria [57], or derived indices [58], with the species number of the BINATS test areas revealed only a marginal correlation of diversity patterns across scales.

Diminishing marginal benefits of diversity have been demonstrated in computer simulations showing that the advantage of increasing genetic variability for resource subdivision depends on the number of loci involved; as the number of loci increases, the effect of resource subdivision on the establishment of an initially rare allele introduced into the population decreases [32], [33].

In these marginal areas, a diversity of tetraploid wheat types have been reported historically, including hulled wheat (denoted as subsp. maroccanum [ 43] or more classically as ssp. dicoccum [ 44, 45]).