Encontrados 72 documentos, a visualizar página 1 de 8
A comprehensive trait dataset for Terrestrial Arthropods of the Azores: insight...
Oyarzabal da Silva, Guilherme; Rigal, François; Cardoso, Pedro; Amorim do Rosário, Isabel; Costa, Ricardo; Lhoumeau, Sébastien Georges AndréABSTRACT: Species functional traits provide critical insights into how organisms interact with and respond to their environment. Key characteristics, such as body size, dispersal ability and trophic specialisation influence species' survival, reproduction and adaptability. Island ecosystems, particularly oceanic archipelagos like the Azores, serve as ideal natural laboratories for studying these traits due to t...
Do Island Spiders Descend From Trees? – A Tale of Island Colonisation and Niche...
Costa, Ricardo; Macías-Hernández, Nuria; Rigal, François; Borges, P.A.V.; Cardoso, PedroABSTRACT: Aim Oceanic islands are known for being home to drastically different communities compared to the mainland, as their isolation and limited area significantly favour clades able to travel long distances over water. On spiders, this happens mainly, although not exclusively, through ballooning whose propensity is unevenly distributed across species and requires specific conditions, possibly influencing t...
Species traits may predict extinction risk of Azorean endemic arthropods
Oyarzabal da Silva, Guilherme; Cardoso, Pedro; Rigal, François; Canelas Boieiro, Mário Rui; Coelho dos Santos, Ana Margarida; Amorim do Rosário, IsabelABSTRACT: Oceanic islands, recognised for their isolation, high endemic species richness and unique evolutionary paths compared with their continental counterparts, are extremely susceptible to anthropogenic activities. The fragmentation of island habitats and disruption of native ecosystems has increased the risk of extinction for many endemic species, including arthropods. Extinction is not random, and some s...
Within-Habitat β Diversity Increases With Elevation in Tropical Forest Spider A...
Malumbres-Olarte, Jagoba; Crespo, Luís Carlos; Cardoso, Pedro; Laizzer, Richard; Mwakisoma, Aloyce; Rigal, François; Szűts, Tomás; Pape, ThomasABSTRACT: While between-habitat comparisons are commonplace in ecology, we know very little about the changes among species assemblages within habitats. Here we aimed to examine within-habitat processes in spider assemblages across three elevations in tropical forests, using a design tailored both geographically and methodologically for this purpose. We hypothesised greater within-habitat βTD (caused by lower c...
Threats and conservation status of the endemic terrestrial arthropods of the Az...
Oyarzabal da Silva, Guilherme; Pozsgai, Gabor; Tsafack, Noelline; Cardoso, Pedro; Rigal, François; Canelas Boieiro, Mário RuiABSTRACT: Insular ecosystems are disproportionately threatened by human activities, leading to an unprecedented decline in species diversity, particularly on remote archipelagos like the Azores. However, the impacts of humans on arthropods, which typically represent a big proportion of island biotas, remain poorly documented. We present an assessment of threats affecting different groups of species, examining t...
Vertical forest strata position and niche shifts between juvenile and adult spi...
Costa, Ricardo; Cardoso, Pedro; Rigal, François; Borges, P.A.V.ABSTRACT: Functional trait analyses have become a vital part of ecological and evolutionary research in recent years. Nevertheless, this progress highlights the persistent and significant gaps in our knowledge of species traits, a limitation known as the Raunkiæran shortfall. For spiders, the difficulty in properly identifying immature specimens has often contributed to discarding the contribution of these life...
The drivers of plant turnover change across spatial scales in the Azores
Leo, María; Rigal, François; Ronquillo, Cristina; Borges, Paulo A. V.; Azevedo, Eduardo Brito; Santos, Ana M. C.Beta diversity patterns are essential for understanding how biological communities are structured. Geographical and environmental factors, as well as species dispersal ability, are important drivers of beta diversity, but their relative importance may vary across spatial scales. In this study, we evaluate whether beta diversity changes across geographical scales and analyse how different drivers affect turnover...
The BALA project: A pioneering monitoring of Azorean forest invertebrates over ...
Pozsgai, Gabor; Lhoumeau, Sébastien; Rosário, Isabel Amorim Do; Boieiro, Mário; Cardoso, Pedro; Costa, Ricardo; Ferreira, Maria Teresa; Leite, AbrãoGlobally, there is a concerning decline in many insect populations, and this trend likely extends to all arthropods, potentially impacting unique island biota. Native non-endemic and endemic species on islands are under threat due to habitat destruction, with the introduction of exotic, and potentially invasive, species, further contributing to this decline. While long-term studies of plants and vertebrate faun...
Unveiling Arthropod Responses to Climate Change: A Functional Trait Analysis in...
Wallon, Sophie; Rigal, François; Melo, Catarina; Elias, Rui B.; Borges, Paulo A. V.This study investigates the impact of elevated temperatures on arthropod communities in intensively managed pastures on the volcanic island of Terceira, Azores (Portugal), using a functional trait approach. Open Top Chambers (OTCs) were employed to simulate increased temperatures, and the functional traits of ground dwelling arthropods were analyzed along a small elevation gradient (180–400 m) during winter and...
Calculating functional diversity metrics using neighbor‐joining trees
Cardoso, Pedro; Guillerme, Thomas; Mammola, Stefano; Matthews, Thomas J.; Rigal, François; Graco‐Roza, Caio; Stahls, Gunilla; Carvalho, José CarlosThe study of functional diversity (FD) provides ways to understand phenomena as complex as community assembly or the dynamics of biodiversity change under multiple pressures. Different frameworks are used to quantify FD, either based on dissimilarity matrices (e.g. Rao entropy, functional dendrograms) or multidimensional spaces (e.g. convex hulls, kernel-density hypervolumes), each with their own strengths and ...