Accelerating the monitoring of global biodiversity : Revisiting the sampled approach to generating Red List Indices

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Henriques , S , Böhm , M , Collen , B , Luedtke , J , Hoffmann , M , Hilton-Taylor , C , Cardoso , P , Butchart , S H M & Freeman , R 2020 , ' Accelerating the monitoring of global biodiversity : Revisiting the sampled approach to generating Red List Indices ' , Conservation Letters , vol. 13 , no. 3 , e12703 . https://doi.org/10.1111/conl.12703

Title: Accelerating the monitoring of global biodiversity : Revisiting the sampled approach to generating Red List Indices
Author: Henriques, Sérgio; Böhm, Monika; Collen, Ben; Luedtke, Jennifer; Hoffmann, Michael; Hilton-Taylor, Craig; Cardoso, Pedro; Butchart, Stuart H. M.; Freeman, Robin
Other contributor: University of Helsinki, Zoology
Date: 2020-05
Language: eng
Number of pages: 9
Belongs to series: Conservation Letters
ISSN: 1755-263X
DOI: https://doi.org/10.1111/conl.12703
URI: http://hdl.handle.net/10138/318066
Abstract: Abstract Given the current biodiversity crisis, pragmatic approaches to detect global conservation trends across a broad range of taxa are critical. A sampled approach to the Red List Index (RLI) was proposed, as many groups are highly speciose. However, a decade after its conception, the recommended 900 species sample has only been implemented in six groups and trend data are available for none, potentially because this sample is unfeasibly high. Using a broader set of all available data we show that when re-assessments are conducted every 10 years, 200 species (400 in some cases) should be sufficient to detect a RLI trend. Correctly detecting changes in slope still requires samples of 900 species (11,000 in some cases). Sampled assessments can accelerate biodiversity monitoring and complement current metrics, but the time-period between assessments and the approaches? purpose should be carefully considered, as there is a trade-off between sample size and the resulting indices.
Subject: Aichi Biodiversity targets
CBD 2020
extinction risk
IUCN Red List
post-2020 Global Biodiversity Framework
RLI
SRLI
Target 12
CONSERVATION STATUS
EXTINCTION RISK
BAROMETER
PROGRESS
TRENDS
1181 Ecology, evolutionary biology
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