Encontros Scientia

Islands in focus: Long-term study reveals exotic arthropod species expansion in native forest from Azores (Portugal)

Sala 2.2.14, FCUL, Lisboa

Por Paulo A. V. Borges (IBBC – cE3c/GBA).


In this contribution, to investigate recent trends on arthropod abundance and richness, we use a unique time-series dataset of arthropods sampled in Azorean native forest over six years (2013-2018) Based on past work investigating macroecological patterns on the Azores we make two predictions: i) since SLAM traps sample mostly canopy arthropod species and this community in Azores is mostly dominated by endemic species and resistant to exotic species we expect that if there is a decrease in abundance of arthropods the endemic species will be the most affected; ii) since exotic species are more dynamic in space and time we also expect a temporal positive signal for this group of species. We test these predictions using the raw measures of abundance and species richness, diversity measures (Hill series) and relative species abundance structure (Gambin alpha SAD) for all arthropod species, endemics, native non-endemics, introduced species and main trophic groups (predators and herbivores). Contrasting with recent studies on mainland, our study shows no evidence of a decline of species numbers and other Hill diversity indices for endemic and native species. However, our study clearly identified another important pattern, the increasing diversity through time of exotic arthropod species. Therefore, only our second prediction was confirmed, and here we clearly identify exotic species as a potential driver of future biodiversity erosion driver on Azorean mountainous native forests. The impact of exotic species on island is well known, and as a result of this long-term study important management actions should be taken to tackle this problem.

cE3c - Centro de Ecologia, Evolução e Alterações Ambientais

Este encontro científico visa dar a conhecer o trabalho dos membros do Centro de Matemática, Aplicações Fundamentais e Investigação Operacional (CMAFcIO), bem como o de colegas de áreas afins pertencentes a outras Unidades de Investigação e promover, na medida do possível, a in

Logótipo do evento, sobre um fundo branco

New date: September 14th-16th, 2020.

O principal objetivo desta iniciativa centra-se em atrair fotógrafos profissionais e amadores a submeter trabalhos de excelência produzidos em Portugal e nos países africanos de língua oficial portuguesa (PALOP) e fomentar práticas de observação, conhecimento e registo através

O cE3c - Centro de Ecologia, Evolução e Alterações Ambientais está mais uma vez a organizar o Seminário cE3c I, que irá decorrer no 1.º semestre do ano letivo 2020/2021 na Faculdade de Ciências.

Ciências ULisboa associa-se ao maior evento mundial sobre inovação para a sustentabilidade - “The Planetiers World Gathering” - que terá lugar no Altice Arena entre 21 e 23 de outubro de 2020, sob os auspícios da

Fotografia de caminhantes numa montanha

Programa de Formação Contínua de Professores do Ensino Básico (3.º ciclo) e Secundário, grupos 420 e 520.

Leitura e escrita são a base fundacional de todas as literacias e a condição primeira para o juízo compreensivo e crítico, o enriquecimento cultural, a formação estética e a memória individual e coletiva das sociedades.

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Objectives: Provide students with basic knowledge of R programming, allowing them to manipulate and visualize data with R.

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