The relationship between neutral genetic diversity and performance in wild arthropod populations

Larger effective populations (Ne) are characterised by higher genetic diversity, which is expected to predict population performance (average individual performance that influences fitness). Empirical studies of the relationship between neutral diversity and performance mostly represent species with small Ne, while there is limited data from the species-rich and ecologically important arthropods that are assumed to have large Ne but are threatened by massive declines. We performed a systematic literature search and used meta-analytical models to test the prediction of a positive association between neutral genetic diversity and performance in wild arthropods. From 14 relevant studies of 286 populations, we detected a weak (r = 0.15) but non-significant positive association both in the full data set (121 effect sizes) and a reduced data set accounting for dependency (14 effect sizes). Theory predicts that traits closely associated with fitness show relatively stronger correlation with ne..., Study eligibility criteria
To review studies on the association between neutral genetic diversity and performance in natural arthropod populations, we strictly included studies that presented data on both population-level neutral genetic diversity and measure(s) of performance in at least two populations of an arthropod species. Performance traits were selected as proxies for fitness and included reproductive, life history, immunity, morphology, and behavioural traits, listed in Table 1 (adapted from Mousseau & Roff, 1987). The suitability of these traits as proxies for fitness in natural populations is supported by associations between offspring production and longevity, morphology (body size) or behaviour (number of mates) in wild crickets (Rodríguez-Muñoz et al., 2010) but otherwise rely on extrapolations from experimental or comparative studies (e.g., Fabian et al., 2018; Pekkala et al., 2011). Performance traits were measured either in the natural setting of the population or u..., , # The relationship between neutral genetic diversity and performance in wild arthropod populations

File name: supp_R_code.R

This R script contains all the code needed to replicate the analyses (including packages and functions).
Models described in the methods section of the manuscript are located in this code.
The code is organised into five main parts:

* Data manipulation (lines 50 to 65)
* Publication bias tests (lines 70 to 89)
* Differences between genetic diversity measures (lines 95 to 210)
* Analysis of all effect sizes (lines 216 to 390)
* Analysis of reduced dataset (lines 395 to 548)

\#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#

File name: supp_tables.xlsx

This Excel document contains the following four sheets:

* 'Table_S1'
* the data are organised in long format (134 rows)
* column descriptions:
A. study = study reference from which relevant estimates were extracted
B. category = performance trait category...