Publication
Genetic diversity of structural species, and stability of populations and ecosystems
| dc.contributor.advisor | Arnaud-Haond, Sophie | |
| dc.contributor.advisor | Serrão, Ester A. | |
| dc.contributor.advisor | Duarte, Carlos | |
| dc.contributor.author | Massa, S. I. | |
| dc.date.accessioned | 2015-09-17T17:06:52Z | |
| dc.date.available | 2015-09-17T17:06:52Z | |
| dc.date.issued | 2012 | |
| dc.date.submitted | 2012 | |
| dc.description.abstract | Anthropogenic actions are responsible for changes in the environment with irreversible consequences on ecosystems worldwide. The positive effect of greater biodiversity in the stability of communities, stability or productivity of ecosystems and resistance to disturbances such as disease and invasion is often debated, but usually accepted. However, the influence of the genetic component of biodiversity on higher levels of biological organization remains poorly examined. Some empirical data have shown that the genetic composition of key plant populations can have a strong effect at the level of the community and ecosystem. In ecosystems dominated by one or a few species, such as seagrass meadows or algae stands, the loss of genetic diversity resulting from habitat loss and population fragmentation of that structural species may have consequences on the overall biodiversity and function of the community . In this study we used a key-species of the intertidal system of the Ria Formosa to combine field studies and manipulative experiments in order to assess the relationship between genetic diversity and the stability (resilience or resistance) of populations. We have determined the sub-lethal temperature of Z. noltei in the Ria Formosa to be approx.. 38ºC, and assessed the physiological response of Z. noltei shoots from two distinct populations under high temperature stress conditions, as well as the gene expression variations at distinct steps of the stress treatment. We also showed that survival of Z noltei shoots can be favoured by higher levels of genotypic and allelic richness, after suffering a diatom bloom. | por |
| dc.description.sponsorship | Universidade do Algarve, Faculdade de Ciências e Tecnologia | por |
| dc.identifier.tid | 101289880 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/6796 | |
| dc.language.iso | eng | por |
| dc.subject | Alterações ambientais | por |
| dc.subject | Ervas marinhas | por |
| dc.subject | Diversidade | por |
| dc.subject | Estabilidade | por |
| dc.subject | Altas temperaturas | por |
| dc.subject | Stress | por |
| dc.subject | Fotossíntese | por |
| dc.subject | Expressão génica | por |
| dc.subject | Diversidade genética | por |
| dc.subject | Aquecimento global | por |
| dc.title | Genetic diversity of structural species, and stability of populations and ecosystems | por |
| dc.type | doctoral thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | por |
| rcaap.type | doctoralThesis | por |
| thesis.degree.discipline | Ciências Biológicas (Ecologia Molecular) | por |
| thesis.degree.level | Doutor | por |
| thesis.degree.name | Doutoramento em Ciências Biológicas (Ecologia Molecular) | por |