Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/100218
Title: The Genetics and Ecology of Post-Fire Eucalyptus globulus Recruitment in an Isolated Stand in Central Portugal
Authors: Costa, Joana 
Silva, Joaquim S. 
Deus, Ernesto José Rodrigues Cardoso de 
Pinho, Simão 
Pinto, Joaquim F. 
Borralho, Nuno
Keywords: Eucalyptus globulus; genetic diversity; kinship estimates; naturalization; paternity assignment; post-fire dispersal
Issue Date: 2022
Publisher: MDPI
Project: info:eu-repo/grantAgreement/FCT/POR_CENTRO/2020.09605.BD/PT/A genetic approach to understand the naturalization of Eucalyptus globulus in Portugal 
info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC/ASP-SIL/30435/2017/PT/Understanding the processes of naturalization of Eucalyptus globulus in Portugal through the use of remote sensing and genetic markers 
Serial title, monograph or event: Forests
Volume: 13
Issue: 5
Place of publication or event: Basel, Switzerland
Abstract: Eucalyptus globulus Labill. is a widespread forest tree species, reported as naturalized across the introduced range, often showing abundant natural regeneration after wildfires. This paper studies a post-fire cohort of seedlings derived from a small, isolated E. globulus stand in central Portugal. The aim is to better understand the genetic dynamics and dispersal mechanisms of naturally established E. globulus populations in the introduced range. The seedling density at 55 m from adult trees was 12,000 ha−1, the farthest seedling being registered at 101 m. Post-fire expansion occurred in a southward direction, in accordance with predominant wind. Seedlings had significantly lower levels of genetic diversity (Ae = 5.8.; He = 0.8) than adult trees (Ae = 6.5; He = 0.8). Crossings were strongly unbalanced, with only eight trees contributing to the sampled seedlings, and one single tree contributing to 52% of these seedlings. Moreover, the co-ancestry amongst seedlings more than doubled (from θ = 0.03 to 0.076), and the population status number was around one third of the value registered for the adult population (from Ns = 16.2 to 6.6). Despite its isolation, external pollen was detected in the stand, and appears to have travelled at least 700 m, contributing to 22% of the offspring. Overall, the seedling cohort is much less diverse than the parent trees, with expected lower resilience and persistence to environmental stresses. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
URI: https://hdl.handle.net/10316/100218
ISSN: 1999-4907
DOI: 10.3390/f13050680
Rights: openAccess
Appears in Collections:I&D CFE - Artigos em Revistas Internacionais

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