Encontros Scientia

Studying the biogeochemical cycles in Mediterranean ecosystems subjected to global change

Sala 2.2.14, FCUL, Lisboa

Por Lourdes Morillas (cE3c/FCUL).

Terrestrial ecosystems are usually subjected to multiple environmental changes that can interact in their impacts on ecosystem services, producing non-additive effects that are unpredictable from single-factor studies. Great efforts have been devoted to disentangle the effects of a single global change driver on ecosystems, whereas we still have a scarce knowledge on how the interaction among these drivers will affect ecosystem functioning. Thus, the scientific community has highlighted the need for carrying out more empirical studies on the interaction among drivers to reduce model uncertainty on the impacts of global environmental changes. Two of the most challenging drivers of global change are the increasing atmospheric nitrogen deposition, due to fossil fuel combustion, fertilizer production and exacerbation of agricultural production and global climate change. Many studies have demonstrated that both increased nitrogen inputs and changed precipitation patterns can have severe consequences on ecosystems processes and the services they provide. However, few studies have addressed interactions between these critical drivers of global change.

The Mediterranean Basin is projected to experience an increased aridity and important changes in the rainfall dynamics with longer dry periods, while nitrogen inputs are expected to increase from the 7 kg N ha-1 yr-1 of mid-1990s to 12 kg N ha-1 yr-1 in 2050. Despite the great impact of the ongoing global change on these ecosystems and their acknowledgment as hot-spots of biodiversity, experts have pointed out the surprisingly low number of studies addressing the potential effects of nitrogen deposition on the ecosystem processes in these areas, not to mention the lack of studies on its interaction with climate change. Therefore, there is an urgent need to improve our knowledge on how enhanced nitrogen deposition and changes in precipitation pattern will affect ecosystem functioning in the Mediterranean Basin.

The biological soil crust is variably composed of soil lichens, cyanobacteria, algae, mosses, bacteria and fungi and typically dominates plant interspaces in these ecosystems. This complex component has been acknowledged as a key factor in soil processes in Mediterranean ecosystems during the last decade due to its crucial role in providing ecosystem services as nutrient cycling, carbon and nitrogen fixation, soil surface protection from erosion, and as part of biotic interactions. Moreover, lichens are amongst the most sensitive organisms to environmental changes at the ecosystem level. Their poikilohydric nature (highly dependent on the atmosphere for water supply), their differential response to N status depending on their functional response group (i.e. oligotrophic vs. nitrophytic species) and their ubiquity in these ecosystems underlie their potential as indicators of both nitrogen deposition and climate change.

cE3c - Centro de Ecologia, Evolução e Alterações Ambientais
Título do evento, sobre uma fotografia de uma aluna a utilizar binóculos

A Universidade de Lisboa preparou diversas atividades para te ajudar a perceber qual o teu futuro profissional. Vem descobrir a ULisboa!

Curso de introdução ao software R, lecionado em 4 módulos a decorrer nos dias 28 de janeiro e 4, 11 e 18 de fevereiro.



Days in Logic will take place in Lisbon (FCUL) in January 30 and 31 and in the morning of February 1, 2020.

Logótipo Portugal 2020, sobre um fundo branco

No âmbito do Portugal 2020 encontra-se a decorrer o prazo de candidatura ao Sistema de Incentivos à Investigação e Desenvolvimento Tecnológico (SI I&DT) para projetos a desenvolver em Copromoção no âmbito da I&D Empresarial.

We begin with an introduction to R and provide a protocol for data exploration to avoid common statistical problems. We will discuss how to detect outliers, deal with collinearity and transformations.

Imagem ilustrativa do evento, acompanhada de várias informações (título, slogan e entidades promotoras)

The Doctoral INPhINIT Fellowship programme aims to support the best scientific talent - of any nationality - and foster innovative and high-quality research in Spain and Portugal by rec

As Jornadas de Estatística Médica (1.ª edição) destinam-se a todos os interessados em aplicações da Estatística nas áreas de Medicina, Enfermagem e Indústria Farmacêutica.


Datas importantes:

Título, data e localização do evento, sobre uma fotografia da cidade de Lisboa

The CSSC workshop is focused on the silicon material and the substrate with strong attention on crystallization. The SiMat workshop focuses on the interface between silicon materials and cell and module technologies.

No seguimento da 1.ª conferência (ICUR2016), serão abordados temas relacionados com a gestão, avaliação e mitigação de riscos naturais e tecnológicos, assim como o seu impacto na saúde e nas sociedades.

Imagem alusiva à Escola de Verão de Energia

Imagina que era possível experimentar um curso universitário antes de concorreres ao ensino superior.

Imagem ilustrativa do evento, acompanhada de várias informações (título e datas)

PANIC2020 will be held in Lisbon from August 31 to September 4, 2020.

This conference is the 22nd in the series of triennial conferences which bring together the Particle and Nuclear Physics communities.