@article{69496cbb72524a74812e5285da640230,
title = "Inferring trends in pollinator distributions across the Neotropics from publicly available data remains challenging despite mobilization efforts",
abstract = "Aim: Aggregated species occurrence data are increasingly accessible through public databases for the analysis of temporal trends in the geographic distributions of species. However, biases in these data present challenges for statistical inference. We assessed potential biases in data available through GBIF on the occurrences of four flower-visiting taxa: bees (Anthophila), hoverflies (Syrphidae), leaf-nosed bats (Phyllostomidae) and hummingbirds (Trochilidae). We also assessed whether and to what extent data mobilization efforts improved our ability to estimate trends in species' distributions. Location: The Neotropics. Methods: We used five data-driven heuristics to screen the data for potential geographic, temporal and taxonomic biases. We began with a continental-scale assessment of the data for all four taxa. We then identified two recent data mobilization efforts (2021) that drastically increased the quantity of records of bees collected in Chile available through GBIF. We compared the dataset before and after the addition of these new records in terms of their biases and estimated trends in species' distributions. Results: We found evidence of potential sampling biases for all taxa. The addition of newly-mobilized records of bees in Chile decreased some biases but introduced others. Despite increasing the quantity of data for bees in Chile sixfold, estimates of trends in species' distributions derived using the postmobilization dataset were broadly similar to what would have been estimated before their introduction, albeit more precise. Main conclusions: Our results highlight the challenges associated with drawing robust inferences about trends in species' distributions using publicly available data. Mobilizing historic records will not always enable trend estimation because more data do not necessarily equal less bias. Analysts should carefully assess their data before conducting analyses: this might enable the estimation of more robust trends and help to identify strategies for effective data mobilization. Our study also reinforces the need for targeted monitoring of pollinators worldwide.",
keywords = "bees, GBIF, hoverflies, hummingbirds, leaf-nosed bats, pollinators, sampling bias, species occurrence data",
author = "Boyd, {Robin J.} and Aizen, {Marcelo A.} and Barahona-Segovia, {Rodrigo M.} and Luis Flores-Prado and Font{\'u}rbel, {Francisco E.} and Francoy, {Tiago M.} and Manuel Lopez-Aliste and Lican Martinez and Morales, {Carolina L.} and Jeff Ollerton and Pescott, {Oliver L.} and Powney, {Gary D.} and Saraiva, {Antonio Mauro} and Reto Schmucki and Zattara, {Eduardo E.} and Claire Carvell",
note = "Funding Information: RJB, GP, RS, JO and CC were funded by the SURPASS2 project under the Newton Fund Latin America Biodiversity Programme: Biodiversity ‐ Ecosystem services for sustainable development, awarded by the UKRI Natural Environment Research Council (NERC) NE/S011870/2. TMF and AMS were funded by the SURPASS2 project in Brazil, awarded by S{\~a}o Paulo Research Foundation (FAPESP) project #2018/14994‐1. AMS was also funded by Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico ‐ Brazil (CNPq) grant number 312.605/2018‐8. RMBS was funded by FONDECYT grant 3200817. MA, LM, CLM and EEZ were funded by the SURPASS2 project in Argentina RD 1984/19, awarded by CONCICET. LFP, FF and MLA were funded by the SURPASS2 project in Chile NE/S011870/1, awarded by the Chilean Agency of Research and Development (ANID). The contribution of OLP was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK Status, Change and Projections of the Environment (UK‐ SCAPE) programme delivering National Capability. We would like to thank Neil Cobb for making us aware of hymenopteran records from the American Museum of Natural History, which had not been picked up by our GBIF search terms, and three anonymous reviewers for their valuable comments on a previous version of this manuscript. Funding Information: RJB, GP, RS, JO and CC were funded by the SURPASS2 project under the Newton Fund Latin America Biodiversity Programme: Biodiversity - Ecosystem services for sustainable development, awarded by the UKRI Natural Environment Research Council (NERC) NE/S011870/2. TMF and AMS were funded by the SURPASS2 project in Brazil, awarded by S{\~a}o Paulo Research Foundation (FAPESP) project #2018/14994-1. AMS was also funded by Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico - Brazil (CNPq) grant number 312.605/2018-8. RMBS was funded by FONDECYT grant 3200817. MA, LM, CLM and EEZ were funded by the SURPASS2 project in Argentina RD 1984/19, awarded by CONCICET. LFP, FF and MLA were funded by the SURPASS2 project in Chile NE/S011870/1, awarded by the Chilean Agency of Research and Development (ANID). The contribution of OLP was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK Status, Change and Projections of the Environment (UK- SCAPE) programme delivering National Capability. We would like to thank Neil Cobb for making us aware of hymenopteran records from the American Museum of Natural History, which had not been picked up by our GBIF search terms, and three anonymous reviewers for their valuable comments on a previous version of this manuscript. Publisher Copyright: {\textcopyright} 2022 The Authors. Diversity and Distributions published by John Wiley & Sons Ltd.",
year = "2022",
month = jul,
doi = "10.1111/ddi.13551",
language = "English",
volume = "28",
pages = "1404--1415",
journal = "Diversity and Distributions",
issn = "1366-9516",
number = "7",
}