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Title: Gondwanan conifer clones imperilled by bushfire
Authors: Worth, James R. P.
Sakaguchi, Shota  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-6180-1747 (unconfirmed)
Rann, Karl D.
Bowman, Clarence J. W.
Ito, Motomi
Jordan, Gregory J.
Bowman, David M. J. S.
Author's alias: 阪口, 翔太
Issue Date: Dec-2016
Publisher: Springer Nature
Journal title: Scientific Reports
Volume: 6
Thesis number: 33930
Abstract: Global increases in fire frequency driven by anthropogenic greenhouse emissions and land use change could threaten unique and ancient species by creeping into long-term fire refugia. The perhumid and mountainous western half of Tasmania is a globally important refugium for palaeo-endemic, fire intolerant lineages, especially conifers. Reproductive strategy will be crucial to the resilience of these organisms under warmer, dryer and more fire prone climates. This study analysed clonal versus sexual reproduction in old growth plots dominated by the palaeo-endemic conifer Athrotaxis cupressoides (Cupressaceae), a species that lacks any traits to tolerate frequent landscape fire. Across most of the seven plots the amount of sexually derived individuals was lower than clonally derived with, on average, 60% of all stems belonging to the same multi-locus lineage (MLL) (i.e. were clonal). Some MLLs were large spanning over 10 s of metres and consisted of up to 62 stems. The high mortality after fire and the rarity of sexual regeneration means that the range of this fire-intolerant species is likely to contract under enhanced fire regimes and has a limited capacity to disperse via seed to available fire refugia in the landscape.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/218828
DOI(Published Version): 10.1038/srep33930
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