The number of tree species on Earth.
biodiversity
forests
hyperdominance
rarity
richness
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
08 02 2022
08 02 2022
Historique:
accepted:
07
12
2021
entrez:
1
2
2022
pubmed:
2
2
2022
medline:
8
3
2022
Statut:
ppublish
Résumé
One of the most fundamental questions in ecology is how many species inhabit the Earth. However, due to massive logistical and financial challenges and taxonomic difficulties connected to the species concept definition, the global numbers of species, including those of important and well-studied life forms such as trees, still remain largely unknown. Here, based on global ground-sourced data, we estimate the total tree species richness at global, continental, and biome levels. Our results indicate that there are ∼73,000 tree species globally, among which ∼9,000 tree species are yet to be discovered. Roughly 40% of undiscovered tree species are in South America. Moreover, almost one-third of all tree species to be discovered may be rare, with very low populations and limited spatial distribution (likely in remote tropical lowlands and mountains). These findings highlight the vulnerability of global forest biodiversity to anthropogenic changes in land use and climate, which disproportionately threaten rare species and thus, global tree richness.
Identifiants
pubmed: 35101981
pii: 2115329119
doi: 10.1073/pnas.2115329119
pmc: PMC8833151
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : NCATS NIH HHS
ID : R13 TR002524
Pays : United States
Commentaires et corrections
Type : ErratumIn
Informations de copyright
Copyright © 2022 the Author(s). Published by PNAS.
Déclaration de conflit d'intérêts
Competing interest statement: M.L.B. is an employee of PNAS.
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