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Monitoring threatened palm populations: a case study of three narrow endemic species of New Caledonia

Monitoring threatened palm populations: a case study of three narrow endemic species of New... ContextNew Caledonia is a hotspot of biodiversity, and among threatened species of the territory many are palms. Palms are sensitive to environmental changes and even more so when these species are narrow endemics. Monitoring populations is therefore an essential measure to conserve these emblems of tropical forest.AimsIn this study, the population structure for three narrow endemic palms has been evaluated: Burretiokentia koghiensis, Cyphophoenix nucele and Chambeyronia houailouensis.MethodsFor each species, individuals were counted in several sampling plots. To understand the observed seedling deficit, we also assessed the impact of rat predation on fruit survival on C. nucele.Key resultsThe three endangered species all have different structures. The structure of B. koghiensis shows that the population dynamics are currently undisturbed. The structure of C. nucele shows a very low number of seedlings, which does not affect the regeneration of the species. In contrast, the structure of C. houailouensis does not show a class deficit but neither does it fit the expected pattern.ConclusionsAll three species are subject to common threats such as introduced rats, yet their population structure is different.ImplicationsThe findings allow us to prioritise actions needed to restore regeneration of these species. These results underscore the importance of acquiring species-level data before implementing conservation actions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Pacific Conservation Biology CSIRO Publishing

Monitoring threatened palm populations: a case study of three narrow endemic species of New Caledonia

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Publisher
CSIRO Publishing
Copyright
Copyright © The Author(s). Published by CSIRO Publishing
ISSN
1038-2097
eISSN
2204-4604
DOI
10.1071/PC21075
Publisher site
See Article on Publisher Site

Abstract

ContextNew Caledonia is a hotspot of biodiversity, and among threatened species of the territory many are palms. Palms are sensitive to environmental changes and even more so when these species are narrow endemics. Monitoring populations is therefore an essential measure to conserve these emblems of tropical forest.AimsIn this study, the population structure for three narrow endemic palms has been evaluated: Burretiokentia koghiensis, Cyphophoenix nucele and Chambeyronia houailouensis.MethodsFor each species, individuals were counted in several sampling plots. To understand the observed seedling deficit, we also assessed the impact of rat predation on fruit survival on C. nucele.Key resultsThe three endangered species all have different structures. The structure of B. koghiensis shows that the population dynamics are currently undisturbed. The structure of C. nucele shows a very low number of seedlings, which does not affect the regeneration of the species. In contrast, the structure of C. houailouensis does not show a class deficit but neither does it fit the expected pattern.ConclusionsAll three species are subject to common threats such as introduced rats, yet their population structure is different.ImplicationsThe findings allow us to prioritise actions needed to restore regeneration of these species. These results underscore the importance of acquiring species-level data before implementing conservation actions.

Journal

Pacific Conservation Biology – CSIRO Publishing

Published: May 24, 2022

References