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Early signs of the effects of forest fragmentation on the genetic diversity and structure of the threatened ecuadorian tree Ocotea rotundata (Lauraceae)

2022-11Artigo científico Acesso aberto
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dc.contributor.authorMarques, Isabel
dc.contributor.authorDraper, David
dc.contributor.authorRiofrio, Lorena
dc.contributor.authorNaranjo, Carlos
dc.contributor.institutionNOVA School of Business and Economics (NOVA SBE)
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2024-02-14T22:46:49Z
dc.date.available2024-02-14T22:46:49Z
dc.date.issued2022-11
dc.descriptionThis research received national funds through the FCT—Fundação para a Ciência e a Tecnologia, I.P., Portugal through the research unit UIDB/00329/2020 (CE3C), UIDB/00239/2020 (CEF), and under the Scientific Employment Stimulus—Individual Call (CEEC Individual)—2021.01107.CEECIND/CP1689/CT0001 (IM).
dc.description.abstractThe diversity of genetic resources is essential to cope with environmental changes. However, despite forests play a crucial role in mitigating changes, genetic knowledge has scarcely been used for forest conservation. In this study, we used nuclear microsatellites to understand the patterns of genetic diversity and population genetic structure in Ocotea rotundata van der Werff (Lauraceae), an endemic Ecuadorian tree, highly affected by habitat changes and fragmentation. Our results show high levels of genetic diversity, except in one population. The level of genetic differentiation between populations was low and genetic clusters showed no apparent spatial pattern. In fact, a high degree of genetic admixture was found between most populations. Migration rates were asymmetric but overall high, except in one population, where outgoing gene dispersal was limited. Nevertheless, allelic fixation values suggested a general deficit in heterozygotes, probably due to an increase in the levels of mating between close relatives. Although long-lived organisms, such as trees, can often accumulate a surprising amount of genetic diversity, the results found here could be an early sign of a decline in the diversity of O. rotundata. These findings provide baseline information on genetic resources to support future restoration programs to mitigate the impacts of changes in O. rotundata populations.en
dc.description.versionpublished
dc.format.extent4172030
dc.identifier.doi10.3390/f13111940
dc.identifier.issn1999-4907
dc.identifier.otherPURE: 50137148
dc.identifier.otherPURE UUID: cbdcada4-eba2-4b83-8274-f4d4b9b76472
dc.identifier.otherWOS: 000894365800001
dc.identifier.otherScopus: 85148687152
dc.identifier.urihttp://hdl.handle.net/10362/163540
dc.language.isoeng
dc.peerreviewedyes
dc.subjectdeforestation
dc.subjectEcuador
dc.subjectinbreeding
dc.subjectgenetic diversity
dc.subjectneotropical forests
dc.subjectOcotea
dc.titleEarly signs of the effects of forest fragmentation on the genetic diversity and structure of the threatened ecuadorian tree Ocotea rotundata (Lauraceae)en
dc.typejournal article
degois.publication.issue11
degois.publication.titleForests
degois.publication.volume13
dspace.entity.typePublication
rcaap.rightsopenAccess

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