Impending Regeneration Failure of the IUCN Vulnerable Borneo Ironwood (Eusideroxylon zwageri)

Qie, Lan and Elsy, Alexander D. and Stumvoll, Ashley and Kwasnicka, Magdalena and Peel, Anna L. and Sullivan, Joseph A. and Ettinger, Maisie S. and Robertson, Alasdair J. and Brisbane, Jeanelle K. and Sawyer, Amber L. and Lui, Yan N. and Ngim Ow, Siew and Sebastianelli, Matteo and Majcher, Bartosz and Duan, Muying and Vigus, Hannah and Pounsin, Grace and Nilus, Reuben and Ewers, Robert (2019) Impending Regeneration Failure of the IUCN Vulnerable Borneo Ironwood (Eusideroxylon zwageri). Tropical Conservation Science, 12 . pp. 1-6. ISSN 1940-0829

Full content URL: http://doi.org/10.1177/1940082918823353

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Impending Regeneration Failure of the IUCN Vulnerable Borneo Ironwood (Eusideroxylon zwageri)
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Abstract

The regeneration of many climax species in tropical forest critically depends on adequate seed dispersal and seedling establishment. Here, we report the decreased abundance and increased spatial aggregation of younger trees of the Borneo ironwood (Eusideroxylon zwageri) in a protected forest in Sabah Malaysia. We observed a high level of seedling herbivory with strong density dependence, likely exacerbated by local aggregation and contributing to the progressively shrinking size distribution. We also note the largely undocumented selective herbivory by sambar deer on E. zwageri seedlings. This study highlights the combined impact of altered megafauna community on a tree population through interlinked ecological processes and the need for targeted conservation intervention for this iconic tropical tree species.

Keywords:seedling survival, neighborhood density, dispersal limitation, spatial clustering, threatened species, wildings
Subjects:C Biological Sciences > C180 Ecology
Divisions:College of Science > School of Life Sciences
ID Code:34778
Deposited On:18 Feb 2019 12:16

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