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Pinanga palms revisited 20 years on: what can changes in Pinanga species populations tell us about rainforest understory palm persistence?

Published online by Cambridge University Press:  15 June 2022

Alison Shapcott*
Affiliation:
Center for Bioinnovation, School of Science Engineering and Technology, University of the Sunshine Coast, Maroochydore, DC 4558, Queensland, Australia
J.W. Ferry Slik
Affiliation:
Faculty of Science, Jln Tungku Link, BE 1410, Universiti Brunei Darussalam, Brunei Darussalam
Roshanizah Rosli
Affiliation:
Institute for Biodiversity and Environmental Research, Jln Tungku Link, BE 1410, Universiti Brunei Darussalam, Brunei Darussalam
Rahayu S. Sukri
Affiliation:
Institute for Biodiversity and Environmental Research, Jln Tungku Link, BE 1410, Universiti Brunei Darussalam, Brunei Darussalam
*
Author for correspondence: Alison Shapcott, Email: ashapcot@usc.edu.au

Abstract

Borneo is the centre of diversity of the palm genus Pinanga. At least 13 understory species have been recorded in the Ulu Temburong National Park in Brunei, but little is known of their persistence. Changes in populations of Pinanga understory palms may be indicative of more widespread changes due to climate change, such as changes in rainfall, which may be important for the palm diversity in the protected area. However, we know little about the population dynamics of these palms, how persistent their populations are or if they behave similarly over long time frames. In 1998, populations of five co-occurring species of Pinanga at several locations in the Ulu Temburong National Park were documented. This project aimed to undertake a comprehensive resurvey of the original five Pinanga palm species populations in order to assess if they showed similar population changes across sites and species after two decades. Overall, most species maintained their population size in the surveyed region but not consistently among sites, and one species significantly declined in abundance. There was considerable variation in population growth rate (R) within and among species and sites that was significantly correlated with density and the percentage of multi-stemmed plants. There was evidence of pulsed recruitment in some species and or sites rather than steady or exponential patterns of population growth.

Type
Research Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press

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References

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