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sofiaszu authored Apr 15, 2024
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Expand Up @@ -21,7 +21,7 @@ Ne below 500 is the approximate point when populations are less able to adapt vi

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The Ne 500 indicator is derived by (a) comparing the **effective population size (Ne) of each population to a critical threshold**, 500, (b) counting the number of populations above the threshold and therefore maintaining genetic diversity, (c) dividing this number by the total number of existing populations since the reporting started to be done (see section [​​Measuring temporal change]8https://ccgenetics.github.io/guidelines-genetic-diversity-indicators/docs/6_Calculations_and_reporting/Temporal_change.html#measuring-temporal-change) for why). For example, a species has 5 populations, 3 of which are above Ne 500. The indicator value for this species would be 3/5 = 0.6. For a detailed explanation on calculating the Ne 500 indicator across multiple species see [Hoban et al (2023b)](https://doi.org/10.1111/conl.12953) and [Hoban et al 2024](https://academic.oup.com/bioscience/advance-article/doi/10.1093/biosci/biae006/7625302?login=false), and the [Calculations section](https://ccgenetics.github.io/guidelines-genetic-diversity-indicators/docs/6_Calculations_and_reporting/Calculations_and_reporting.html#calculations-and-reporting) of these guidelines.
The Ne 500 indicator is derived by (a) comparing the **effective population size (Ne) of each population to a critical threshold**, 500, (b) counting the number of populations above the threshold and therefore maintaining genetic diversity, (c) dividing this number by the total number of existing populations since the reporting started to be done (see section [​​Measuring temporal change](8https://ccgenetics.github.io/guidelines-genetic-diversity-indicators/docs/6_Calculations_and_reporting/Temporal_change.html#measuring-temporal-change) for why). For example, a species has 5 populations, 3 of which are above Ne 500. The indicator value for this species would be 3/5 = 0.6. For a detailed explanation on calculating the Ne 500 indicator across multiple species see [Hoban et al (2023b)](https://doi.org/10.1111/conl.12953) and [Hoban et al 2024](https://academic.oup.com/bioscience/advance-article/doi/10.1093/biosci/biae006/7625302?login=false), and the [Calculations section](https://ccgenetics.github.io/guidelines-genetic-diversity-indicators/docs/6_Calculations_and_reporting/Calculations_and_reporting.html#calculations-and-reporting) of these guidelines.


The values for the Ne 500 indicator range between 0 and 1, with 0 indicating all populations have Ne<500 (no populations are large enough to sustain genetic diversity) and 1 indicating that all populations have Ne>500 (all populations are large enough to sustain genetic diversity).
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