Margarida Machado
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Research Interests
Margarida Machado has a total of 104 co-authors. Here are the top co-authors by number of shared publications:
- Luís Cancela da Fonseca
Universidade do Algarve
8 shared publications Jordi Sala
5 shared publications- Margarida Cristo
CCMAR, Centro de Ciências do Mar, Campus de Gambelas, 8005-139 Faro, Portugal
5 shared publications - Dani Boix
GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
3 shared publications - Juan García-De-Lomas
University of Cadiz
3 shared publications Margarida Cristo
3 shared publications
Latest Publications
- Open Access
- 28 February 2022
- Published by Brazilian Journals in Brazilian Journal of Health Review
- Vol. 5 (2) , 4475-4485
Preocupações maternas de mães com bebés até aos 9 meses / Maternal concerns of mothers with babies up to 9 months old
O nascimento do primeiro filho implica a reorganização de papéis, exigindo dos pais competências e habilidades que devem ser des envolvidas e apoiadas, durante o período de gravidez e pós-parto. Objetivo:Identificar as preocupações maternas e analisar a sua relação com as variáveis: idade da criança, vigilância na habilitações académicas. Metodologia: Foi aplicado um questionário a uma amostra de 203 mães com bebés até 9 meses de idade, com variáveis de caracterização social e clínica, incluindo uma escala de preocupações maternas (Mothers’ Concern Questionnaire – MoCQ de Sheil et al, (1985), de Mendes, Rodrigues, Santos & Pedrosa (2010). Resultados: Foi encontrada significância estatística nas preocupações em relação ao bebé (3,33 ± 0,81), em relação ao companheiro (2,76 ± 0,68) e em relação à família (2,97 ± 0,96). Todos com p < 0,05. Conclusão: O estudo permitiu perceber da existência de preocupações independentemente da idade do bebé que exigem acompanhamento por parte dos profissionais.
- 28 February 2022
- Published by Brazilian Journals in Brazilian Journal of Health Review
- Vol. 5 (2) , 4475-4485
Open AccessPreocupações maternas de mães com bebés até aos 9 meses / Maternal concerns of mothers with babies up to 9 months old
O nascimento do primeiro filho implica a reorganização de papéis, exigindo dos pais competências e habilidades que devem ser des envolvidas e apoiadas, durante o período de gravidez e pós-parto. Objetivo:Identificar as preocupações maternas e analisar a sua relação com as variáveis: idade da criança, vigilância na habilitações académicas. Metodologia: Foi aplicado um questionário a uma amostra de 203 mães com bebés até 9 meses de idade, com variáveis de caracterização social e clínica, incluindo uma escala de preocupações maternas (Mothers’ Concern Questionnaire – MoCQ de Sheil et al, (1985), de Mendes, Rodrigues, Santos & Pedrosa (2010). Resultados: Foi encontrada significância estatística nas preocupações em relação ao bebé (3,33 ± 0,81), em relação ao companheiro (2,76 ± 0,68) e em relação à família (2,97 ± 0,96). Todos com p < 0,05. Conclusão: O estudo permitiu perceber da existência de preocupações independentemente da idade do bebé que exigem acompanhamento por parte dos profissionais.
- 11 August 2021
- Published by Wiley in Freshwater Biology
- Vol. 66 (9)
Cover Image
- 18 June 2021
- Published by Wiley in Freshwater Biology
- Vol. 66 (9) , 1680-1697
Distinctive genetic signatures of two fairy shrimp species with overlapping ranges in Iberian temporary ponds
Temporary lentic water bodies host biotic assemblages adapted to the transient nature of these freshwater habitats. Fairy shrimps (Crustacea, Branchiopoda, Anostraca) are one of the most important biological components of these unique environments and have a fossil record dating back to the Middle Jurassic (>150 million years). Some anostracan species show a geographically restricted distribution, whereas others are widely dispersed. We aimed to investigate the relationship between different geographic extents and patterns of genetic structure in species of Anostraca. Following this objective, we selected two species with contrasting ranges but overlapping geographic distributions and similar life‐history traits in the study area. We analysed additional information that, from an ecological (e.g. egg‐bank, niche breadth, and pond connectivity) and evolutionary (e.g. crown‐group age of each species) perspective, may explain the obtained phylogeographic patterns. Between 2005 and 2018, we sampled two species of fairy shrimps (309 specimens of Branchipus cortesi and 264 specimens of Tanymastix stagnalis) from 53 temporary ponds of Portugal. We added five other locations from Spain and France to include other European locations for T. stagnalis. Additionally, we also sampled Branchipus schaefferi from two temporary water bodies (Spain and Morocco) to include in the dating analysis. Reconstructed phylogenies based on mitochondrial sequence data indicate the existence of deeply divergent clades with an unequivocal phylogeographic structure in T. stagnalis and shallower divergences in B. cortesi with a less clear geographic correspondence. We found evidence of frequent local and rare long‐distance dispersal events in both species and limited intermediate dispersal, which was more common in B. cortesi. A Bayesian dating analysis using the Branchiopoda fossil record estimated the age of the most recent common ancestors of T. stagnalis and B. cortesi at 32.4 and 12.8 million years, respectively. Haplotype accumulation curves indicated that only a portion of the genetic composition of the species was sampled on each hydroperiod and showed the existence of large, genetically diverse egg banks that remain in the soil. These egg banks represent a genetic reservoir that guarantees the survival of the species because active populations from different hydroperiods may be genetically different and adapt to a changing environment. We hypothesise that the contrasting phylogeographic patterns displayed by the two fairy shrimp species may result from: (1) the earlier age of the most recent common ancestor of T. stagnalis, as older species have more time to accumulate mutations and, thus, are expected to exhibit higher genetic differentiation among populations; (2) slight differences in adult behaviour, life‐history traits and cyst morphologies of T. stagnalis and B. cortesi favouring different animal dispersal vectors with distinct dispersal abilities. Therefore, phylogeographic patterns may be explained by both evolutionary and ecological processes, which operate in different time scales.
- 18 June 2021
- Published by Wiley in Freshwater Biology
- Vol. 66 (9) , 1680-1697
Distinctive genetic signatures of two fairy shrimp species with overlapping ranges in Iberian temporary ponds
Temporary lentic water bodies host biotic assemblages adapted to the transient nature of these freshwater habitats. Fairy shrimps (Crustacea, Branchiopoda, Anostraca) are one of the most important biological components of these unique environments and have a fossil record dating back to the Middle Jurassic (>150 million years). Some anostracan species show a geographically restricted distribution, whereas others are widely dispersed. We aimed to investigate the relationship between different geographic extents and patterns of genetic structure in species of Anostraca. Following this objective, we selected two species with contrasting ranges but overlapping geographic distributions and similar life‐history traits in the study area. We analysed additional information that, from an ecological (e.g. egg‐bank, niche breadth, and pond connectivity) and evolutionary (e.g. crown‐group age of each species) perspective, may explain the obtained phylogeographic patterns. Between 2005 and 2018, we sampled two species of fairy shrimps (309 specimens of Branchipus cortesi and 264 specimens of Tanymastix stagnalis) from 53 temporary ponds of Portugal. We added five other locations from Spain and France to include other European locations for T. stagnalis. Additionally, we also sampled Branchipus schaefferi from two temporary water bodies (Spain and Morocco) to include in the dating analysis. Reconstructed phylogenies based on mitochondrial sequence data indicate the existence of deeply divergent clades with an unequivocal phylogeographic structure in T. stagnalis and shallower divergences in B. cortesi with a less clear geographic correspondence. We found evidence of frequent local and rare long‐distance dispersal events in both species and limited intermediate dispersal, which was more common in B. cortesi. A Bayesian dating analysis using the Branchiopoda fossil record estimated the age of the most recent common ancestors of T. stagnalis and B. cortesi at 32.4 and 12.8 million years, respectively. Haplotype accumulation curves indicated that only a portion of the genetic composition of the species was sampled on each hydroperiod and showed the existence of large, genetically diverse egg banks that remain in the soil. These egg banks represent a genetic reservoir that guarantees the survival of the species because active populations from different hydroperiods may be genetically different and adapt to a changing environment. We hypothesise that the contrasting phylogeographic patterns displayed by the two fairy shrimp species may result from: (1) the earlier age of the most recent common ancestor of T. stagnalis, as older species have more time to accumulate mutations and, thus, are expected to exhibit higher genetic differentiation among populations; (2) slight differences in adult behaviour, life‐history traits and cyst morphologies of T. stagnalis and B. cortesi favouring different animal dispersal vectors with distinct dispersal abilities. Therefore, phylogeographic patterns may be explained by both evolutionary and ecological processes, which operate in different time scales.
- 9 August 2017
- Published by Springer Nature in Hydrobiologia
- Vol. 801 (1) , 99-116
How threatened are large branchiopods (Crustacea, Branchiopoda) in the Iberian Peninsula?
- 9 August 2017
- Published by Springer Nature in Hydrobiologia
- Vol. 801 (1) , 99-116
How threatened are large branchiopods (Crustacea, Branchiopoda) in the Iberian Peninsula?
- 12 July 2017
- Published by Springer Nature in Hydrobiologia
- Vol. 801 (1) , 81-98
Defining the importance of landscape metrics for large branchiopod biodiversity and conservation: the case of the Iberian Peninsula and Balearic Islands
- 12 July 2017
- Published by Springer Nature in Hydrobiologia
- Vol. 801 (1) , 81-98
Defining the importance of landscape metrics for large branchiopod biodiversity and conservation: the case of the Iberian Peninsula and Balearic Islands
- Open Access
- 3 March 2017
- Published by Springer Nature in Marine Biodiversity Records
- Vol. 10 (1) , 7
Ampelisca lusitanica (Crustacea: Amphipoda): new species for the Atlantic coast of Morocco
- 3 March 2017
- Published by Springer Nature in Marine Biodiversity Records
- Vol. 10 (1) , 7
Open AccessAmpelisca lusitanica (Crustacea: Amphipoda): new species for the Atlantic coast of Morocco
- 26 February 2016
- Published by Springer Nature in Hydrobiologia
- Vol. 782 (1) , 187-199
Assessing the conservation status of Mediterranean temporary ponds using biodiversity: a new tool for practitioners
- 26 February 2016
- Published by Springer Nature in Hydrobiologia
- Vol. 782 (1) , 187-199
Assessing the conservation status of Mediterranean temporary ponds using biodiversity: a new tool for practitioners
- 8 September 2014
- Published by Magnolia Press in Zootaxa
- Vol. 3860 (4) , 343-360
A new species of Onuphis (Polychaeta: Onuphidae) from Southern Portugal, with comments on the validity of O. pancerii Claparède, 1868.
Onuphis farensis sp. nov. (Annelida, Polychaeta) is described, based on a population inhabiting intertidal sandbanks in the mesotidal coastal lagoon of Ria Formosa (Southern Portugal). It can be distinguished from all other known species within the genus by having bi– and tridentate pseudocompound hooks on the first 4 chaetigers, single filament branchiae from chaetiger 5, and subacicular hooks from chaetiger 9. The species was previously collected in the Bay of Cádiz and Isla Cristina (SW Spain), in a similar habitat to Ria Formosa, but referred to O. geophiliformis Moore, 1903. The taxonomic status of other Onuphis species recorded in the European waters is also discussed. On the whole, O. pancerii Claparède, 1868, described from the Gulf of Naples, has been treated as a junior synonym of O. eremita Audouin & Milne-Edwards, 1833, but taking the more restrictive definition of this species accepted today, should be considered as a valid Mediterranean species. Finally, O. opalina (Verrill, 1873) and O. rullieriana (Amoureux, 1977) may be synonymous, as both species are similar morphologically, occur at similar depths, and have partially overlapping geographical distributions. The different diagnostic characters utilised for the new species are analysed, with the number of chaetigers with postchaetal lobes determined to be a poor taxonomic character for the genus Onuphis, proving to be size-related. A synoptic table with all worldwide species of the genus Onuphis is provided, together with a dichotomic key for the species hitherto recorded in the European and nearby waters.
- 8 September 2014
- Published by Magnolia Press in Zootaxa
- Vol. 3860 (4) , 343-360
A new species of Onuphis (Polychaeta: Onuphidae) from Southern Portugal, with comments on the validity of O. pancerii Claparède, 1868.
Onuphis farensis sp. nov. (Annelida, Polychaeta) is described, based on a population inhabiting intertidal sandbanks in the mesotidal coastal lagoon of Ria Formosa (Southern Portugal). It can be distinguished from all other known species within the genus by having bi– and tridentate pseudocompound hooks on the first 4 chaetigers, single filament branchiae from chaetiger 5, and subacicular hooks from chaetiger 9. The species was previously collected in the Bay of Cádiz and Isla Cristina (SW Spain), in a similar habitat to Ria Formosa, but referred to O. geophiliformis Moore, 1903. The taxonomic status of other Onuphis species recorded in the European waters is also discussed. On the whole, O. pancerii Claparède, 1868, described from the Gulf of Naples, has been treated as a junior synonym of O. eremita Audouin & Milne-Edwards, 1833, but taking the more restrictive definition of this species accepted today, should be considered as a valid Mediterranean species. Finally, O. opalina (Verrill, 1873) and O. rullieriana (Amoureux, 1977) may be synonymous, as both species are similar morphologically, occur at similar depths, and have partially overlapping geographical distributions. The different diagnostic characters utilised for the new species are analysed, with the number of chaetigers with postchaetal lobes determined to be a poor taxonomic character for the genus Onuphis, proving to be size-related. A synoptic table with all worldwide species of the genus Onuphis is provided, together with a dichotomic key for the species hitherto recorded in the European and nearby waters.
- 1 March 2014
- Published by Society for the Study of Amphibians and Reptiles in Journal of Herpetology
- Vol. 48 (1) , 38-44
Genetic Divergence for the Amphibian Pleurodeles waltl in Southwest Portugal: Dispersal Barriers Shaping Geographic Patterns
- 1 March 2014
- Published by Society for the Study of Amphibians and Reptiles in Journal of Herpetology
- Vol. 48 (1) , 38-44
Genetic Divergence for the Amphibian Pleurodeles waltl in Southwest Portugal: Dispersal Barriers Shaping Geographic Patterns
- 20 November 2013
- Published by Springer Nature in Marine Biodiversity
- Vol. 44 (2) , 223-228
A deep-water crinoid Leptometra celtica bed off the Portuguese south coast
- 20 November 2013
- Published by Springer Nature in Marine Biodiversity
- Vol. 44 (2) , 223-228
A deep-water crinoid Leptometra celtica bed off the Portuguese south coast