Increased mortality of tropical tree seedlings during the extreme 2015-16 El Niño.
Panama
climate change
drought
forest dynamics
rainfall gradient
tropics
Journal
Global change biology
ISSN: 1365-2486
Titre abrégé: Glob Chang Biol
Pays: England
ID NLM: 9888746
Informations de publication
Date de publication:
10 2021
10 2021
Historique:
received:
02
04
2021
accepted:
21
06
2021
pubmed:
18
7
2021
medline:
21
10
2021
entrez:
17
7
2021
Statut:
ppublish
Résumé
As extreme climate events are predicted to become more frequent because of global climate change, understanding their impacts on natural systems is crucial. Tropical forests are vulnerable to droughts associated with extreme El Niño events. However, little is known about how tropical seedling communities respond to El Niño-related droughts, even though patterns of seedling survival shape future forest structure and diversity. Using long-term data from eight tropical moist forests spanning a rainfall gradient in central Panama, we show that community-wide seedling mortality increased by 11% during the extreme 2015-16 El Niño, with mortality increasing most in drought-sensitive species and in wetter forests. These results indicate that severe El Niño-related droughts influence understory dynamics in tropical forests, with effects varying both within and across sites. Our findings suggest that predicted increases in the frequency of extreme El Niño events will alter tropical plant communities through their effects on early life stages.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5043-5053Informations de copyright
© 2021 John Wiley & Sons Ltd.
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