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.

12h00-13h00
cE3c - Centro de Ecologia, Evolução e Alterações Ambientais

BioISI Research Seminar, por Célia Miguel (BioISI, Ciências ULisboa).

Hi-Phi Seminar, por Bruno Jacinto (CFCUL) e Henrique Leitão (CIUHCT).

Seminário no âmbito da Unidade Curricular de Introdução aos Recursos Naturais Vegetais, por Luís Bonifácio (INIAV - Instituto Nacional de Investigação Agrária e Veterinária).

Imagem ilustrativa do evento (saúde e medicina)

Webinars da redeSAÚDE, de participação gratuita (mediante inscrição prévia).

A iniciativa conta com a participação de Luís Saraiva (Ciências ULisboa).

Geometry Webinar, por João Pedro dos Santos (Universidade de Paris-Sorbonne e Universidade de Montpellier).

A iniciativa conta com a participação de Maria João Verdasca (cE3c, Ciências ULisboa).

Conversa com Galopim de Carvalho.

Cartaz do evento

A Feira Internacional dos Minerais, Gemas e Fósseis está de regresso ao Museu Nacional de História Natural e da Ciência!

Logótipo do projeto

Bioecosys brings together expertise and experience in forest ecosystem management and economics to communicate recent findings and to accelerate the transfer of knowledge and best practices to stakeholders and forest actors.

Workshop promovido pelo GAPsi - Gabinete de Apoio Psicopedagógico.

Talks @DI, por Marcelo Inuzuka e Ruan Rodrigues.

Mathematical Logic Webinar, por Paulo Santos (Universidade Nova de Lisboa - CMA).

Seminário no âmbito da Unidade Curricular de Introdução aos Recursos Naturais Vegetais, por Jorge Faria (INIAV - Instituto Nacional de Investigação Agrária e Veterinária / MED - Instituto Mediterrâneo para a Agricultura, Ambiente e Desenvolvimento).

Imagem alusiva ao evento

This Workshop will gather specialists in the field of Combinatorial Optimization, from several countries, to present and discuss recent research work around this subject. Luís Gouveia, coordinator of CMAFcIO and José Rui Figueira, president of CEG-IST will present the Opening Session.

Sessão de apresentação do livro coordenado por José Almeida Silva (IDL / Ciências ULisboa).

Imagem ilustrativa do evento e várias informações (título, oradora, data)

Formação de Comunicação em Ciência(s), por Cristina Nobre Soares.

Conversa com Galopim de Carvalho.

Workshop promovido pelo GAPsi - Gabinete de Apoio Psicopedagógico.

Imagem alusiva ao evento

The training program will provide industry and academia the technological and scientific pathways required for deployment of sustainable cost-effective large scale energy storage and conversion powered by renewable energies.

Logótipo dos Prémios, sobre um fundo azul escuro

Candidaturas a decorrer até 15 de dezembro de 2021.

Logótipo do ENBE XVII, sobre um fundo branco

This meeting is a forum for scientists of all academic levels, (from master to principal investigators), to present their work and discuss, fostering new ideas and collaborations. We invite researchers from all over the world to participate and submit their work.

Conferência do Centro Interuniversitário de História das Ciências e da Tecnologia, por Céline Paillette (Université Paris 1 Panthéon-Sorbonne).

Desde o início de 2020 que somos bombardeados, através da comunicação social, com informações sobre o novo coronavírus humano - SARS-CoV-2 - que provoca a síndrome respiratória aguda grave. Nunca se comunicou tanto, em tempo real, um tema científico, mas será que já vimos todas as nossas perguntas sobre este tema respondidas?

Pormenor de mapa do continente europeu

Candidaturas online de 01 a 31 de dezembro de 2021.

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