Author: Nic Lughadha, Eimear; Walker, Barnaby E.; Canteiro, Catia; Chadburn, Helen; Davis, Aaron P.; Hargreaves, Serene; Lucas, Eve J.; Schuiteman, Andre; Williams, Emma; Bachman, Steven P.; Baines, David; Barker, Amy; Budden, Andrew P.; Carretero, Julia; Clarkson, James J.; Roberts, Alexandra; Rivers, Malin C.
Description: Herbarium specimens provide verifiable and citable evidence of the occurrence of particular plants at particular points in space and time, and are vital resources for assessing extinction risk in the tropics, where plant diversity and threats to plants are greatest. We reviewed approaches to assessing extinction risk in response to the Convention on Biological Diversity’s Global Strategy for Plant Conservation Target 2: an assessment of the conservation status of all known plant species by 2020. We tested five alternative approaches, using herbarium-derived data for trees, shrubs and herbs in five different plant groups from temperate and tropical regions. All species were previously fully assessed for the IUCN Red List. We found significant variation in the accuracy with which different approaches classified species as threatened or not threatened. Accuracy was highest for the machine learning model (90%) but the least data-intensive approach also performed well (82%). Despite concerns about spatial, temporal and taxonomic biases and uncertainties in herbarium data, when specimens represent the best available evidence for particular species, their use as a basis for extinction risk assessment is appropriate, necessary and urgent. Resourcing herbaria to maintain, increase and disseminate their specimen data is essential to guide and focus conservation action.
Subject headings: Herbarium; Herbaria; Plant extinction; Tropics; Conservation
Publication year: 2019
Journal or book title: Philosophical Transactions of the Royal Society B: Biological Sciences
Volume: 374
Issue: 1763
Pages: 20170402
Find the full text: https://www.strategian.com/fulltext/Lughadha2018.pdf
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Serial number: 3820