Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets
We use population modelling to inform conservation for the common eider, a well-studied seaduck of the circumpolar Northern Hemisphere. Our models are parameterised by vital rates measuring survival and reproduction, which we collated through lit review and a call for data. We performed precision-we...
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ftzenodo:oai:zenodo.org:6077985 2024-09-09T19:36:51+00:00 Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets Alex Nicol-Harper 2022-02-23 https://doi.org/10.5281/zenodo.6077985 eng eng Zenodo https://youtu.be/Umyd9_rFEbc https://zenodo.org/communities/esmarconf2022 https://doi.org/10.5281/zenodo.6077984 https://doi.org/10.5281/zenodo.6077985 oai:zenodo.org:6077985 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode ESMARConf2022, Evidence Synthesis and Meta-Analysis in R Conference 2022, online, 21-24 February 2022 ESMARConf2022 evidence synthesis meta-analysis RStats info:eu-repo/semantics/lecture 2022 ftzenodo https://doi.org/10.5281/zenodo.607798510.5281/zenodo.6077984 2024-07-26T03:56:28Z We use population modelling to inform conservation for the common eider, a well-studied seaduck of the circumpolar Northern Hemisphere. Our models are parameterised by vital rates measuring survival and reproduction, which we collated through lit review and a call for data. We performed precision-weighted meta-analysis (Doncaster & Spake, 2018) for vital rates with >20 independent estimates: adult annual survival, clutch size (number of eggs laid) and hatching success (proportion of eggs producing hatchlings). We excluded estimates without associated sample size, and included variance estimates where provided/calculable, otherwise inputting the imputed mean variance. Random-effects error structure allowed for likely variation in population means across this species’ wide range; however, all I2 values were <1%, suggesting that most between-study variation was due to chance rather than true heterogeneity. In many cases, studies presented multiple estimates for a given vital rate – e.g. over different study areas and/or multiple years. Where appropriate, we conducted sub-meta-analyses to generate single estimates which could be handled equivalently to non-disaggregated estimates from other studies. These decisions align with the suggestions of Mengersen et al. (2013) and Haddaway et al. (2020) for maintaining independence among heterogeneous samples, and our workflow ensured that the overall meta-analysis was conducted on independent replicate observations for each vital rate. Lecture Common Eider Zenodo |
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ESMARConf2022 evidence synthesis meta-analysis RStats Alex Nicol-Harper Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
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ESMARConf2022 evidence synthesis meta-analysis RStats |
description |
We use population modelling to inform conservation for the common eider, a well-studied seaduck of the circumpolar Northern Hemisphere. Our models are parameterised by vital rates measuring survival and reproduction, which we collated through lit review and a call for data. We performed precision-weighted meta-analysis (Doncaster & Spake, 2018) for vital rates with >20 independent estimates: adult annual survival, clutch size (number of eggs laid) and hatching success (proportion of eggs producing hatchlings). We excluded estimates without associated sample size, and included variance estimates where provided/calculable, otherwise inputting the imputed mean variance. Random-effects error structure allowed for likely variation in population means across this species’ wide range; however, all I2 values were <1%, suggesting that most between-study variation was due to chance rather than true heterogeneity. In many cases, studies presented multiple estimates for a given vital rate – e.g. over different study areas and/or multiple years. Where appropriate, we conducted sub-meta-analyses to generate single estimates which could be handled equivalently to non-disaggregated estimates from other studies. These decisions align with the suggestions of Mengersen et al. (2013) and Haddaway et al. (2020) for maintaining independence among heterogeneous samples, and our workflow ensured that the overall meta-analysis was conducted on independent replicate observations for each vital rate. |
format |
Lecture |
author |
Alex Nicol-Harper |
author_facet |
Alex Nicol-Harper |
author_sort |
Alex Nicol-Harper |
title |
Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
title_short |
Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
title_full |
Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
title_fullStr |
Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
title_full_unstemmed |
Using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
title_sort |
using sub-meta-analyses to maintain independence among spatiotemporally-replicated demographic datasets |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5281/zenodo.6077985 |
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Common Eider |
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Common Eider |
op_source |
ESMARConf2022, Evidence Synthesis and Meta-Analysis in R Conference 2022, online, 21-24 February 2022 |
op_relation |
https://youtu.be/Umyd9_rFEbc https://zenodo.org/communities/esmarconf2022 https://doi.org/10.5281/zenodo.6077984 https://doi.org/10.5281/zenodo.6077985 oai:zenodo.org:6077985 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.607798510.5281/zenodo.6077984 |
_version_ |
1809905997278347264 |