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Lookup NU author(s): Professor Philip McGowan
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Identifying local extinctions is integral to estimating species richness and geographic range changes and informing extinction risk assessments. However, the species occurrence records underpinning these estimates are frequently compromised by a lack of recorded species absences making it impossible to distinguish between local extinction and lack of survey effort—for a rigorously compiled database of European and Asian Galliformes, approximately 40% of half-degree cells contain records from before but not after 1980. We investigate the distribution of these cells, finding differences between the Palaearctic (forests, low mean human influence index (HII), outside protected areas (PAs)) and Indo-Malaya (grassland, high mean HII, outside PAs). Such cells also occur more in less peaceful countries. We show that different interpretations of these cells can lead to large over/under-estimations of species richness and extent of occurrences, potentially misleading prioritization and extinction risk assessment schemes. To avoid mistakes, local extinctions inferred from sightings records need to account for the history of survey effort in a locality.
Author(s): Boakes EH, Fuller RA, McGowan PJK, Mace GM
Publication type: Article
Publication status: Published
Journal: Biology Letters
Print publication date: 01/03/2016
Online publication date: 09/03/2016
Acceptance date: 15/02/2016
Date deposited: 08/04/2016
ISSN (print): 1744-9561
ISSN (electronic): 1744-957X
Publisher: The Royal Society Publishing
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