Open Access Repository

Population age structures, persistence and flowering cues in Cerberiopsis candelabra (Apocynaceae), a long-lived monocarpic rain-forest tree in New Caledonia

Read, J, Sanson, GD, Burd, M, Allen, K ORCID: 0000-0002-8403-4552, Hua, Q, Kerr, S, Isnard, S, McCoy, S and Carrasco, M 2021 , 'Population age structures, persistence and flowering cues in Cerberiopsis candelabra (Apocynaceae), a long-lived monocarpic rain-forest tree in New Caledonia' , Journal of Tropical Ecology, vol. 37, no. 6 , pp. 236-275 , doi: 10.1017/S0266467421000389.

Full text not available from this repository.

Abstract

Cerberiopsis candelabra Vieill. is a long-lived, monocarpic (= semelparous) and mass-flowering rain-forest tree, endemic to New Caledonia. Population size structures suggest establishment has been episodic, followed by a recruitment gap that might signal population decline. Here, we use age structures based on tree rings to better assess population dynamics and persistence, and investigate influences of tree size, age and growth rate on flowering. Age structures of populations surveyed in 2007–2008 were unimodal, with establishment over c. 15–81 y, followed by a recruitment gap of c. 23–79 y. Seedling mortality was generally high. High densities of flowering trees or large-scale exogenous disturbances may be necessary for in-situ regeneration. There was no evidence of a simple flowering threshold: flowering in 2017 occurred across a wide range of tree size, age and growth rate. Instead, evidence suggested that size and age at flowering may vary among plants depending on their growth trajectory. Environmental triggers of flowering were not identified by dating tree establishment, but the last three mass-flowering events occurred in years of tropical cyclones. Regeneration and persistence might be facilitated if large-scale disturbances trigger flowering, improving reproductive efficiency by synchronising flowering and linking reproduction with environmental conditions that enhance seedling recruitment.

Item Type: Article
Authors/Creators:Read, J and Sanson, GD and Burd, M and Allen, K and Hua, Q and Kerr, S and Isnard, S and McCoy, S and Carrasco, M
Keywords: flowering cues, mass flowering, masting, monocarpy, monodominance, population dynamics, rain forest, regeneration
Journal or Publication Title: Journal of Tropical Ecology
Publisher: Cambridge Univ Press
ISSN: 0266-4674
DOI / ID Number: 10.1017/S0266467421000389
Copyright Information:

© The Author(s), 2021. Published by Cambridge University Press

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP