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Evolutionary lessons from Drosophila melanogaster for colonization

How do history, selection, and effective population size shape evolution?

Evento online

Por Marta Santos (EE-cE3c).

Understanding the factors that constrain adaptation, namely during colonization, has been a major topic in evolutionary biology and was the chief focus of my doctoral thesis. Using a highly replicated experimental evolution design with well-characterized Drosophila melanogaster populations, we aimed to respond to several evolutionary questions relevant for the colonization of a new habitat. First, we showed that reduced effective population size impaired the responses to directional selection and increased between-population differentiation. Second, we saw that interpopulation hybridization can have an unpredictable outcome, due to the complex genetic architecture of fitness-related traits and the multitude of interfering factors. This calls for caution on the use of hybridization in conservation management, especially in small, endangered populations. Third, we showed that evolutionary history is very important for a population’s subsequent evolution and fate, namely in a reverse colonization scenario. Finally, we presented the first, while very crude, experimental test of the Hamiltonian wave of adaptation. Further studies involving genomic analysis of the experimental populations, other traits, and diets will shed brighter light on how history, selection, and effective population size shape evolution during colonization.


Transmissão em direto no canal de YouTube do cE3c.

12h00-13h00
cE3c - Centro de Ecologia, Evolução e Alterações Ambientais
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Summer School no âmbito da Rede UNITE! (University Network for Innovation, Technology and Engineering), de que faz parte a ULisboa.

Cartaz do evento

Uma iniciativa com o objetivo de aproximar a ciência dos jovens de todas as idades, com desafios, palestras e muita diversão, num formato inteiramente online!

Primeira edição das Manhãs de Matemática na Aberta, dedicada à Geometria, com a participação de Carlos Florentino (Ciências ULisboa). 

Hi-Phi Seminar, por Lorenzo Baravalle (FCUL, CFCUL) e Maurizio Esposito (FCUL, CIUHCT).

Solid Earth Seminar, por Ana Matias (CIMA - Universidade do Algarve, Portugal).

Seminário conjunto do Centro de Estatística e Aplicações da Universidade de Lisboa e do Centro de Matemática Computacional e Estocástica, por Dae-Jin Lee (BCAM - Basque Center for Applied Statistics / Pontificia Universidad Católica de Chile - UC, Departamento de Ecología).

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Sessão de homenagem no âmbito da 13.ª Reunião Anual da APG - Associação Portuguesa de Geólogos.

Seminário Permanente de Filosofia das Ciências, por Gil Santos  (CFCUL/GI2).

Colóquio de Matemática, por Teresa Monteiro Fernandes (Departamento de Matemática | Ciências ULisboa).

O curso visa apresentar uma série de perspetivas sobre o desenvolvimento conceitual da estatística e sobre o uso de inferências e modelos estatísticos nas ciências empíricas.

Cartaz de apresentação da iniciativa

Young Inventors Prize / European Inventor Award: candidaturas até 01 de outubro de 2021.

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Workshop internacional associado ao projeto Medea-Chart.

Imagem ilustrativa do curso, acompanhada de várias informações úteis

Um curso dirigido ao público em geral e a estudantes de arte ou ciência (a partir dos 16 anos), com interesse em desenho de observação, ilustração e biologia, com ou sem experiência em desenho.

The objective of this course is to introduce participants to the details of communication and writing scientific publications.

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Um programa de aceleração de ideias e negócios, promovido pela redeSaúde, com candidaturas até 30 de setembro de 2021.

The objective of this course is to introduce participants to the details of communicating science to non-specialized audiences, including, but not exclusive to, public and private stakeholders, students and teachers, and media professionals.

This course aims to evidence the importance of natural history collections for the study of biodiversity, to show new tools and approaches to extract and disseminate biodiversity data from natural history collections and to increase awareness of young researchers for the scientific and cultural value of Natural History Museums.

The course aims at providing an introduction to stable isotopes ratios as tools to understand global, ecosystem and community level bio/geo cycles; light isotopes: H, N, C, O and S isotopes, geo cycles and ecological significance; sampling and analytical methodologies in stable isotope analysis.

EvoS aims at turning evolutionary theory into a common language to areas that pertain to the natural world, including human affairs.

The course SoilEco aims at introducing attendants to an updated state of the art of diversity of the soil biota and the functional roles played by soil organisms in key ecological processes.

In this course, we promote a multidisciplinary approach presenting the most recent findings on the topic and challenging the traditional way of considering symbiotic associations as exceptions and not as the rule.

The goal of this course is to provide to the participants with current and practical knowledge on urban ecology, including ecological and social aspects.

This course aims to explore ways of communicating science to non-specialized audiences, such as policy makers, industry, general public (including students and teachers), through their engagement and participation in citizen science activities.

This course introduces the field of island biogeography, a discipline that has long influenced other research areas such as macroecology, community ecology, evolution and conservation biology.

Scientists, as the main actors in the production of scientific knowledge, have the responsibility of having an active voice in communicating this knowledge – and that can be achieved for example by a conscious use of the communication tools at their disposal and a better articulation with journalists, among other means.

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