Publicação
Factors involved in natural regeneration of Eucalyptus globulus
| datacite.subject.fos | Ciências Naturais::Ciências Biológicas | pt_PT |
| dc.contributor.advisor | Máguas, Cristina | |
| dc.contributor.advisor | Chozas, Sergio | |
| dc.contributor.author | Anjos, Andreia | |
| dc.date.accessioned | 2025-03-18T18:07:18Z | |
| dc.date.available | 2025-03-18T18:07:18Z | |
| dc.date.issued | 2025-02-10 | |
| dc.date.submitted | 2024-07-26 | |
| dc.description.abstract | Identifying factors that allow an introduced species to reproduce and spread is critical, particularly for high-value species, such as Eucalyptus globulus, one of the most planted hardwood trees worldwide. In Portugal, this Australian species covers 26% of the forested area in managed and unmanaged plantations and as old, isolated trees (called seed-trees). While its dispersal behaviour is known, new scenarios are emerging: altered fire regimes and tree breeding programs. Thus, this thesis addresses i) the impact of off-season fires, pre-fire management and the presence of seed-trees along with ii) local factors that influence E. globulus establishment; iii) the phenological behaviour and reproductive structures production and iv) the capsule morphology, seed set and germination rate of improved trees and seed-trees, to ultimately assess this species dispersal risk. To achieve that, managed and unmanaged E. globulus plantations and areas adjacent to seed-trees were sampled for sapling cover and biotic and abiotic factors in unburnt and burnt areas affected by the spring and autumn fires. Also, phenological behaviour, reproductive structures’ production and seed germination were studied on clonal stands and compared with seedling-based stands and old seed-trees, in mesic and xeric sites. Our findings reveal that i) sapling establishment is limited due to pre-fire management; ii) natural regeneration increases after autumn fires; iii) seed-trees constitute a source of propagules; iv) saplings are sensitive to post-fire conditions; v) tree-related traits influence sapling cover in plantations, whereas seed-trees buffer unfavourable conditions; v) clonal trees exhibit shorter flowering, fewer reproductive structures, and higher phenological variability and behave differently among each other; vi) clonal seeds display a high germination rate and vii) seed-trees produce fewer seeds while maintaining their germination rate over time. This information aims to draw attention to E. globulus improved plantations and the presence of seed-trees in the landscape management strategies. | pt_PT |
| dc.identifier.tid | 101626924 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.5/99447 | |
| dc.language.iso | eng | pt_PT |
| dc.relation | Centre for Ecology, Evolution and Environmental Changes | |
| dc.subject | Exotic species | pt_PT |
| dc.subject | Off-season fires | pt_PT |
| dc.subject | Environmental factors | pt_PT |
| dc.subject | Tree improvement | pt_PT |
| dc.subject | Espécies exóticas | pt_PT |
| dc.subject | Fogos fora de época | pt_PT |
| dc.subject | Fatores ambientais | pt_PT |
| dc.subject | Melhoramento genético | pt_PT |
| dc.title | Factors involved in natural regeneration of Eucalyptus globulus | pt_PT |
| dc.type | doctoral thesis | |
| dspace.entity.type | Publication | |
| oaire.awardNumber | UIDB/00329/2020 | |
| oaire.awardTitle | Centre for Ecology, Evolution and Environmental Changes | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00329%2F2020/PT | |
| oaire.fundingStream | 6817 - DCRRNI ID | |
| person.familyName | Anjos | |
| person.givenName | Andreia | |
| person.identifier.ciencia-id | D710-2596-5B79 | |
| person.identifier.orcid | 0000-0003-3987-6862 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | doctoralThesis | pt_PT |
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| relation.isAuthorOfPublication.latestForDiscovery | f48bf7dc-d8f5-42b0-8c37-a9ea97c7b0b9 | |
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| thesis.degree.name | Tese de doutoramento, Biologia (Ecologia), Universidade de Lisboa, Faculdade de Ciências, 2025 | pt_PT |