24 documents found, page 1 of 3
Dispersal syndromes are poorly associated with climatic niche differences in th...
Leo, María; Steinbauer, Manuel J.; Borges, Paulo A. V.; Azevedo, Eduardo B.; Gabriel, Rosalina; Schaefer, Hanno; Santos, Ana M.C.AIM: Environmental niche tracking is linked to the species ability to disperse. While well investigated on large spatial scales, dispersal constraints also influence small-scale processes and may explain the difference between the potential and the realized niche of species at small scales. Here we test whether niche size and niche fill differ systematically according to dispersal syndrome within isolated ocean...
The failed invasion of Harmonia axyridis in the Azores, Portugal : climatic res...
Alaniz, Alberto J.; Soares, António O.; Vergara, Pablo M.; Azevedo, Eduardo B.; Grez, Audrey A.We tested two questions: (i) whether the climatic conditions of the Azorean Islands in Portugal may have restricted the invasion of Harmonia axyridis across this archipelago and (ii) determine what population of this species could have a higher probability of invading the islands. We used MaxEnt to project the climate requirements of different H. axyridis populations from three regions of the world, and the pot...
Dispersal syndromes are poorly associated with climatic niche differences in th...
Leo, María; Steinbauer, Manuel J.; Borges, P.A.V.; Azevedo, Eduardo B.; Gabriel, Rosalina; Schaefer, Hanno; Santos, Ana M. C.Aim: Environmental niche tracking is linked to the species ability to disperse. While well investigated on large spatial scales, dispersal constraints also influence small-scale processes and may explain the difference between the potential and the realized niche of species at small scales. Here we test whether niche size and niche fill differ systematically according to dispersal syndrome within isolated ocean...
Nutrient-specific responses of a phytoplankton community: a case study of the N...
Ramos, J. Barcelos e; Schulz, Kai G.; Voss, Maren; Narciso, Áurea; Müller, Marius N.; Reis, Francisco V.; Cachão, Mário; Azevedo, Eduardo B.Nutrient concentrations are unevenly distributed in the oceans, influencing the abundance and composition of phytoplankton communities. Even so, the dominant driving factors responsible for variability between phytoplank ton communities are still unclear. In the North Atlantic Gyre, the Azores present a good opportunity to study phytoplankton communities of oligotrophic areas that experience nutrient pulses. We...
Avaliar a eficiência das áreas protegidas para representar a biodiversidade: o ...
Vergílio, Marta H. S.; Fonseca, Catarina; Calado, Helena; Borges, Paulo A. V.; Elias, Rui B.; Gabriel, Rosalina; Martins, António; Azevedo, Eduardo B.[…]. Nos Açores podem ser encontradas inúmeras espécies endémicas que tornam este arquipélago importante, do ponto de vista da conservação dos valores naturais. A rede de APs nos Açores está organizada em Parques Naturais de Ilha, no Parque Marinho dos Açores e em APs de importância local. O Parque Natural de Ilha (PNI) engloba diferentes categorias de áreas terrestres e marinhas, que possuem diferentes objecti...
A biogeographical perspective on species abundance distributions : recent advan...
Matthews, Thomas J.; Borges, Paulo A. V.; Azevedo, Eduardo B.; Whittaker, Robert J.It has become increasingly recognized that multiple processes can generate similar shapes of species abundance distributions (SADs), with the result that the fit of a given SAD model cannot unambiguously provide evidence in support of a given theory or model. An alternative approach to comparing the fit of different SAD models to data from a single site is to collect abundance data from a variety of sites, and ...
Effects of climate change on the distribution of indigenous species in oceanic ...
Ferreira, Maria T.; Cardoso, Pedro; Borges, Paulo A. V.; Gabriel, Rosalina; Azevedo, Eduardo B.; Reis, Francisco; Araújo, Miguel B.; Elias, Rui B.Oceanic islands host a high proportion of the world’s endemic species. Many such species are at risk of extinction owing to habitat degradation and loss, biological invasions and other threats, but little is known about the effects of climate change on island native biodiversity. The Azorean archipelago provides a unique opportunity to study species-climatechange relationships. We used ensemble forecasting to e...
Seasonal and interannual variations in coccolithophore abundance off Terceira I...
Narciso, Áurea; Gallo, Francesca; Valente, André; Cachão, Mário; Cros, Lluïsa; Azevedo, Eduardo B.; Ramos, Joana BarcelosIn order to characterize the natural coccolithophore community occurring offshore Azores and to de-termine their annual and interannual patterns, monthly samples were collected, from September 2010 toDecember 2014, in the photic zone off Terceira Island.The present study revealed a clear seasonal distribution and a considerable interannual variability of theliving coccolithophore community. The highest coccolit...
Assessing the efficiency of protected areas to represent biodiversity : a small...
Vergílio, Marta H. S.; Fonseca, Catarina; Calado, Helena; Borges, Paulo A. V.; Elias, Rui B.; Gabriel, Rosalina; Martins, António; Azevedo, Eduardo B.Protected areas (PAs) have been selected using either subjective or objective criteria applied to an extremely limited subset of biodiversity. Improved availability of species distribution data, better statistical tools to predict species distributions and algorithms to optimize spatial conservation planning allow many impediments to be overcome, particularly on small islands. This study analyses whether 219 sp...
Seasonal and interannual variations in coccolithophore abundance off Terceira I...
Narciso, Áurea; Gallo, Francesca; Valente, Andre; Cachão, Mário; Cros, Lluïsa; Azevedo, Eduardo B.; e Ramos, Joana BarcelosIn order to characterize the natural coccolithophore community occurring offshore Azores and to determine their annual and interannual patterns, monthly samples were collected, from September 2010 to December 2014, in the photic zone off Terceira Island. The present study revealed a clear seasonal distribution and a considerable interannual variability of the living coccolithophore community. The highest coccol...