Ecological Archives A025-048-A3
Pauline E. Quesnelle, Kathryn E. Lindsay, and Lenore Fahrig. 2015. Relative effects of landscape-scale wetland amount and landscape matrix quality on wetland vertebrates: a meta-analysis. Ecological Applications 25:812–825. http://dx.doi.org/10.1890/14-0362.1
Appendix C. Funnel plots to assess publication bias in the meta-analysis.
Fig. C1. Relationship between z-transformed correlation coefficients (ESZr) for wetland amount and sample size (n) to assess publication bias. Dashed line is the summary mean-weighted effect size from random-effect meta-analysis across 330 effect sizes from 63 studies. There was no strong evidence of publication bias since effect sizes were symmetrically distributed around the summary effect and produced a funnel-shape with greater variation in studies at low sample sizes.
Fig. C2. Relationship between z-transformed correlation coefficients (ESZr) for forest amount and sample size (n) to assess publication bias. Dashed line is the summary mean-weighted effect size from random-effect meta-analysis across 330 effect sizes from 63 studies. There was no strong evidence of publication bias since effect sizes were symmetrically distributed around the summary effect, with the exception of two effect sizes at large sample sizes; otherwise, the scatterplot produced a funnel-shape with greater variation in studies at low sample sizes.
