Mercè Galbany Casals

Mercè Galbany Casals
Autonomous University of Barcelona | UAB · Department of Animal Biology, Vegetal Biology and Ecology

PhD

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54
Publications
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Publications

Publications (54)
Article
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Climate changes are top biodiversity shapers, both during the past and future. Mapping the most climatic stable and unstable zones on Earth could improve our understanding of biodiversity distribution and evolution. Here, we present a set of maps based on a global scale, high resolution (ca. 5 km) new Climate Stability Index (CSI). The CSI consider...
Article
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The eastern Mediterranean basin hosts a remarkably high plant diversity. Historical connections between currently isolated areas across the Aegean region and long-distance dispersal events have been invoked to explain current distribution patterns of species. According to most recent treatments, at least two Cymbalaria species occur in this area, C...
Article
Gnaphalieae are one of the larger tribes of the daisy family Asteraceae (Compositae) with c. 2100 species in 178 genera, occurring globally across a wide range of temperate habitats. Recent years have seen considerable advances in our understanding of their phylogenetics and evolution, but there is no widely accepted, stable subtribal classificatio...
Article
The subtribe Saussureinae is a highly speciose group with more than 600 species distributed in the Northern Hemisphere and is particularly species‐rich at the high mountains of central and eastern Asia. Saussurea and Jurinea are the two main genera described within the subtribe. However, up to 15 satellite genera are recognized in some recent taxon...
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Evolution does not always result in dichotomous phylogenetic trees. For instance, in anacladogenetic speciation, where a new species originates by budding, the ancestral taxon is often initially paraphyletic. Here we study Cymbalaria muelleri (Plantaginaceae), a chasmophytic species endemic to Sardinia, a major island in the Mediterranean Basin. It...
Article
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Evolution does not always result in dichotomous phylogenetic trees. For instance, in anacladogenetic speciation, where a new species originates by budding, the ancestral taxon is often initially paraphyletic. Here we study Cymbalaria muelleri (Plantaginaceae), a chasmophytic species endemic to Sardinia, a major island in the Mediterranean Basin. It...
Article
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Hybridisation events between Invasive Alien Species can contribute to the acquisition of novel traits or a higher fitness through gene exchange and, in consequence, facilitate the adaptation to new environments and the colonization of new territories. Using morphological data and DNA sequences, we have identified and described a new hybrid between...
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Abstract The Balearic Islands, Corsica and Sardinia (BCS) constitute biodiversity hotspots in the western Mediterranean Basin. Oligocene connections and long distance dispersal events have been suggested to cause presence of BCS shared endemic species. One of them is Cymbalaria aequitriloba, which, together with three additional species, constitute...
Article
The basal grade of the large, widely‐distributed Helichrysum‐Anaphalis‐Pseudognaphalium (HAP) clade (Asteraceae, Gnaphalieae) comprises exclusively southern African taxa. These species possess unusual trait combinations relative to the remaining species (a high proportion of annuals, unusual capitulum arrangement, and low base chromosome numbers)....
Article
Pseudognaphalium Kirp. (Compositae: Gnaphalieae) comprises approximately 90 species and it has a worldwide but fragmented distribution. This study provides a total of 20 chromosome counts, nine of which are the first report for a species, and the rest are confirmation of previous reports. With the addition of these data to the previously published...
Article
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La clasificación genérica de varios miembros de la tribu Gnaphalieae (Compositae) y en particular la delimitación genérica del antiguo género Gnaphalium ha sido problemática durante mucho tiempo. El género Pseudognaphalium fue escindido de Gnaphalium por su morfología lo que después fue apoyado por filogenias moleculares. Sin embargo, la identidad...
Article
Target enrichment is a cost-effective sequencing technique that holds promise for elucidating evolutionary relationships in fast-evolving lineages. However, potential biases and impact of bioinformatic sequence treatments in phylogenetic inference have not been thoroughly explored yet. Here, we investigate this issue with an ultimate goal to shed l...
Article
Multiple factors related to complex geomorphological and climatic history, in addition to biological factors such as hybridization, hinder the definition of some Mediterranean plant groups. The existence of controversial taxonomic treatments, the possible hybridization events involved, and its unknown evolutionary history, make the Helichrysum pend...
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The Macaronesian species of Euphorbia sect. Aphyllis subsect. Macaronesicae are distributed in four of the five archipelagos of Macaronesia and two mainland enclaves in Portugal and Morocco. The aims of this study are to investigate the biogeographic history of this group with AFLP and cpDNA markers, and to identify taxonomic entities within subsec...
Article
Cymbalaria comprises ten species and six subspecies growing in rocky habitats in the Mediterranean Basin. Several features, such as the genus’ highly fragmented distribution as well as noticeable ecological differentiation between partially sympatric species and presence of ploidy barriers between species suggest the involvement of different specia...
Article
The Socotra archipelago off the Horn of Africa shelters morphologically diverse endemic species of Asteraceae tribe Gnaphalieae, eight species placed in Helichrysum and five newly discovered. We reconstructed their phylogenetic relationships, analysing nuclear ribosomal DNA (nrDNA) internal transcribed spacer and external transcribed spacer, three...
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Helichrysum italicum is a widely distributed species in the Mediterranean Basin, which has received controversial taxonomic treatments at infraspecific level owing to its morphological variability. In this paper we perform a detailed multivariate analysis of morphological characters using an exhaustive sampling of H. italicum. Integrating previousl...
Preprint
Cymbalaria is a Mediterranean genus including ten species and six subspecies growing on rocky habitats. A very fragmented distribution, the different ecologic preferences of partially sympatric species and the presence of different ploidy levels, suggest the role of allopatric, sympatric ecological and polyploid speciation in its evolution. The aim...
Article
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The use of DNA sequence data in plant systematics has brought us closer than ever to formulating well-founded hypotheses about phylogenetic relationships, and phylogenetic research keeps on revealing that plant genera as traditionally circumscribed often are not monophyletic. Here, we assess the monophyly of genera documented in Rothmaler's "Exkurs...
Article
The variation and evolutionary dynamics of the twin hairs covering the achenes of the external female florets in Filago and related genera are studied using scanning electron microscope (SEM) and a Bayesian reconstruction of ancestral character states. A molecular phylogenetic hypothesis based on sequences of ITS and ETS (nuclear ribosomal DNA) and...
Article
The Helichrysum-Anaphalis-Pseudognaphalium (HAP) clade is a major component of the tribe Gnaphalieae (Compositae) and includes the genera Helichrysum, Anaphalis, Achyrocline and Pseudognaphalium. Allopolyploid origins for at least two clades within the HAP clade have previously been suggested, one involving the genus Anaphalis and the Mediterranean...
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Unlabelled: • Premise of the study: Tribe Cardueae (thistles) forms one of the largest tribes in the family Compositae (2400 species), with representatives in almost every continent. The greatest species richness of Cardueae occurs in the Mediterranean region where it forms an important element of its flora. New fossil evidence and a nearly reso...
Article
Hybridisation is considered an important evolutionary phenomenon in Gnaphalieae, but contemporary hybridisation has been little explored within the tribe. Here, hybridisation between Helichrysum orientale and Helichrysum stoechas is studied at two different localities in the islands of Crete and Rhodes (Greece). Using three different types of molec...
Article
The yellow-flowered everlasting daisy Helichrysum italicum (Asteraceae, Gnaphalieae) is widely distributed in the Mediterranean basin, where it grows in continuous and widespread populations in diverse open habitats. Helichrysum italicum subsp. microphyllum has a disjunct distribution in the Balearic Islands (Majorca and Dragonera), Corsica, Sardin...
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Background and Aims The geographic distribution of the genus Plectocephalus comprises a single species in Ethiopia, two in North America and possibly four more in South America, in a striking disjunction that is exceptional for genera of the tribe Cardueae. The enormity of this disjunction cast doubts on the precise taxonomic delineation of the gen...
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Euphorbia subg. Esula (Euphorbiaceae) has recently been shown, using molecular analyses, to contain a clade with a disjunct distribution in Macaronesia, South Africa and the Eritreo-Arabian region, and being primarily made up of members of sect. Tithymalus subsect. Pachycladae and sect. Tirucalli. To delimitate this disjoint group, we carried out p...
Article
Phylogenetic analyses have suggested that the everlasting daisy tribe Gnaphalieae colonized the globe repeatedly and rapidly from southern Africa. However, both the circumscription of monophyletic groups of “out of Africa“ Gnaphalieae genera and the identification of their sister groups in southern Africa has proved difficult. We have analysed sequ...
Article
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A complete nomenclatural treatment of the genera Filago L. and Logfia Cass. is provided, as well as a list of the species included in each genus and subgenus, as they have been newly circumscribed. Nomenclatural types for eleven validly published species names are designated, which correspond to (1) the types of names of widely used and long-establ...
Article
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Helichrysum unicapitatum S.G. Şenol, Ö. Seçmen & B. Öztürk (Asteraceae) is described and illustrated from the SW province of Anatolia, Turkey. It grows on crys-talline calcareous rocks between Evran Tepe and Karababa Tepe (1800–2300 m), situ-ated within the Denizli Babadağ (Cadmus) Mountain Range. Helichrysum compactum seems to be its closest relat...
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A taxonomic revision of Helichrysum sect. Stoechadina, a section with a Mediterranean distribution, is presented. Taxonomic, nomenclatural, morphological, chromosomal, geographical, and ecological data are provided for each taxon. Eleven taxa are recognized, two lectotypifications are proposed, and a taxonomic key and a sectional description are in...
Article
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The Filago group (Asteraceae, Gnaphalieae) comprises eleven genera, mainly distributed in Eurasia, northern Africa and northern America: Ancistrocarphus, Bombycilaena, Chamaepus, Cymbolaena, Evacidium, Evax, Filago, Logfia, Micropus, Psilocarphus and Stylocline. The main morphological character that defines the group is that the receptacular paleae...
Article
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The Filago group (Asteraceae, Gnaphalieae) comprises eleven genera, mainly distributed in Eurasia, northern Africa and northern America: Ancistrocarphus, Bombycilaena, Chamaepus, Cymbolaena, Evacidium, Evax, Filago, Logfia, Micropus, Psilocarphus and Stylocline. The main morphological character that defines the group is that the receptacular paleae...
Article
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Helichrysum nicolai from the Cape Verdean island of São Nicolau is described as a species new to science and illustrated. The systematic position in Helichrysum of this acaulescent dwarf rosette shrub with heterogamous capitula, in which the female flowers outnumber the hermaphrodite ones, is established using an ITS phylogeny based on maximum pars...
Article
We report one new base number for Helichrysum, x = 5, found in the South African species H. indicum (2n = 10), and additional evidence for the recently documented x = 4 found in several South African species: H. litorale (2n = 8), H. spiralepis (2n = 8) and H. zwartbergense (2n = 8). Dysploidy is shown as an additional evolutionary trend within the...
Article
Please read the Spanish version of this Abstract.En el presente trabajo se actualiza el conocimiento corológico de la leguminosa Vicia vicioides (Desf.) Cout. en la provincia de Alicante, aportando información sobre cinco nuevas poblaciones, que se añaden a la única localidad conocida previamente.
Article
Mitotic chromosome numbers are reported for 31 populations representing 28 taxa of Helichrysum. Twelve are new and eight others provide confirmation of a unique previous reference. A new chromosome number, 2n = 42, is reported for H. odoratissimum. Polyploidy is confirmed as the most significant evolutionary trend in chromosome number within the ge...
Article
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The limits of the genera that compose the Onopordum group of the Cardueae-Carduinae are difficult to establish. There are two main life forms; one is exemplified in the genus Onopordum, which includes only biennial colonisers in the Mediterranean region and temperate Eurasia; the second life form is exemplified in the group of perennial herbs of th...
Article
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The genus Helichrysum has 500–600 species in Africa, Madagascar, the Mediterranean basin, Macaronesia, western and central Asia, and India. The aims of this study are to confirm the exclusion of Castroviejoa from Helichrysum, to elucidate the origin of the Macaronesian endemics, to confirm the monophyly of the Mediterranean-Asiatic group, and, with...
Article
Es presenta un conspectus de Helichrysum sect. Stoechadina (DC.) Gren. & Godr. Es reconeixen vuit espècies i cinc subespècies. Per cada taxó acceptat es relacionen tots el sinònims trobats a la bibliografia, a partir de l'estudi dels protòlegs, el material tipus i els nombrosos exemplars d'herbari que comprenen tota l'àrea de distribució i la varia...
Article
As a part of a research study on the systematics of the genus Helichrysum in the Mediterranean and Irano-turanian area, 53 new typifications of names in Gnaphalium and Helichrysum belonging to taxa in Helichrysum sect. Stoechadina, H. sect. Helichrysum and H. sect. Virginea are presented, along with some additional comments on the nomenclature of t...
Article
Castroviejoa Galbany, L. Sáez & Benedí has been recently described as a new genus of Gnaphalieae, and comprises the two Mediterranean species Castroviejoa frigida (Labill.) Galbany, L. Sáez & Benedí and C. montelinasana (Schmid) Galbany, L. Sáez & Benedí, formerly known as Helichrysum frigidum (Labill.) Willd. and H. montelinasanum Schmid. In the p...
Article
The internal transcribed spacers ITS1 and ITS2 of the nuclear rDNA were sequenced for 41 Helichrysum species (Gnaphalieae), focusing on the Mediterranean group of species, together with eight representatives of other genera of the Gnaphalieae, in order to check the hypothesised monophyly of the Mediterranean Helichrysum group and the correspondence...
Article
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Han sido examinados 13 caracteres morfológicos en 46 individuos de 14 poblaciones de Galium brockmannii Briq. con el objetivo de verificar el estatus taxonómico del presunto endemismo pirenaico G. brockmannii subsp. aterratzense Romo. Mediante un análisis multivariante de la varianza (MANOVA) se ha constatado que las dos subespecies de G. brockmann...