30 documents found, page 1 of 3
Entangled fates of holobiont genomes during invasion: nested bacterial and host...
ARNAUD-HAOND, Sophie; Aires, T; Candeias, R.; Teixeira, S. J. L.; Duarte, C. M.; Valero, M.; A, SerrãoSuccessful prevention and mitigation of biological invasions requires retracing the initial steps of introduction, as well as understanding key elements enhancing the adaptability of invasive species. We studied the genetic diversity of the green alga Caulerpa taxifolia and its associated bacterial communities in several areas around the world. The striking congruence of alpha and beta diversity of the algal ge...
Response of seagrass indicators to shifts in environmental stressors: A global ...
Roca, G.; Alcoverro, T.; Krause-Jensen, D.; Balsby, T. J. S.; van Katwijk, M. M.; Marba, N.; Santos, Rui; Arthur, R.; Mascaro, O.Although seagrass-based indicators are widely used to assess coastal ecosystem status, there is little universality in their application. Matching the plethora of available indicators to specific management objectives requires a detailed knowledge of their species-specific sensitivities and their response time to environmental stressors. We conducted an extensive survey of experimental studies to determine the ...
Highly polymorphic microsatellite markers for the Mediterranean endemic fan mus...
Gonzalez-Wanguemert, Mercedes; Costa, J.; Basso, L.; Duarte, C. M.; Serrão, Ester; Hendriks, IrisPinna nobilis is an endemic bivalve of the Mediterranean Sea whose populations have decreased in the last decades due to human pressure; as a consequence, it was declared a protected species in 1992. Despite its conservation status, few genetic studies using mitochondrial markers have been published. We report on the isolation and development of 10 microsatellite loci for the fan mussel, Pinna nobilis. All loci...
Large-scale prediction of seagrass distribution: the case of Cymodocea nodosa (...
Chefaoui, Rosa M.; Assis, J.; Duarte, C. M.; Serrão, EsterUnderstanding the factors that affect seagrass meadows encompassing their entire range of distribution is challenging yet important for their conservation. We model the environmental niche of Cymodocea nodosa using a combination of environmental variables and landscape metrics to examine factors defining its distribution and find suitable habitats for the species. The most relevant environmental variables defin...
Characterization of polymorphic microsatellite loci in the Antarctic krill Euph...
Candeias, Rui; Teixeira, Sara; Duarte, C. M.; Pearson, G. A.Background: The Antarctic krill, Euphausia superba is a pelagic crustacean, abundant in high-density swarms (10 000 – 30 000 ind/m2) with a circumpolar distribution and a key role in the food web of the Southern Ocean. Only three EST derived microsatellite markers have been used in previous genetic studies, hence we developed additional highly polymorphic microsatellite markers to allow robust studies of the ge...
Polar marine biology science in Portugal and Spain: Recent advances and future ...
Xavier, J.; Barbosa, Ana B.; Agustí, S.; Alonso-Sáez, L.; Alvito, P.; Ameneiro, J.; Ávila, C.; Baeta, A.; Canário, J.; Carmona, R.; Catry, P.; Ceia, F.Polar marine ecosystems have global ecological and economic importance because of their unique biodiversity and their major role in climate processes and commercial fisheries, among others. Portugal and Spain have been highly active in a wide range of disciplines in marine biology of the Antarctic and the Arctic. The main aim of this paper is to provide a synopsis of some of the results and initiatives undertak...
Invasion is a community affair: clandestine followers in the bacterial communit...
Aires, Tânia; Serrão, Ester; Kendrick, G.; Duarte, C. M.; ARNAUD-HAOND, SophieBiological invasions rank amongst the most deleterious components of global change inducing alterations from genes to ecosystems. The genetic characteristics of introduced pools of individuals greatly influence the capacity of introduced species to establish and expand. The recently demonstrated heritability of microbial communities associated to individual genotypes of primary producers makes them a potentiall...
Entangled effects of allelic and clonal (genotypic) richness in the resistance ...
Massa, S. I.; Paulino, Cristina M.; Serrão, Ester; Duarte, C. M.; ARNAUD-HAOND, SophieBackground - The relationship between species diversity and components of ecosystem stability has been extensively studied, whilst the influence of the genetic component of biodiversity remains poorly understood. Here we manipulated both genotypic and allelic richness of the seagrass Zostera noltii, in order to explore their respective influences on the resistance of the experimental population to stress. Thus ...
Selective elimination of chloroplastidial dna for metagenomics of bacteria asso...
Aires, Tânia; Marbà, N.; Serrão, Ester; Duarte, C. M.; ARNAUD-HAOND, SophieMolecular analyses of bacteria associated with photosynthetic organisms are often confounded by coamplification of the chloroplastidial 16S rDNA with the targeted bacterial 16S rDNA. This major problem has hampered progress in the characterization of bacterial communities associated to photo-synthetic organisms and has limited the full realization of the potential offered by the last generation of metagenomics a...
Implications of extreme life span in clonal organisms: millenary clones in mead...
ARNAUD-HAOND, Sophie; Duarte, C. M.; Diaz-Almela, E.; Marbà, N.; Sintes, T.; Serrão, EsterThe maximum size and age that clonal organisms can reach remains poorly known, although we do know that the largest natural clones can extend over hundreds or thousands of metres and potentially live for centuries. We made a review of findings to date, which reveal that the maximum clone age and size estimates reported in the literature are typically limited by the scale of sampling, and may grossly underestima...