Sara Martin-Hernanz

Complutense University of Madrid | UCM · Biodiversity, Ecology and Evolution

Conservación Vegetal 27 50 SEBOTA: un encuentro para conocer de cerca la diversidad de nuestra flora Desde el recientemente creado Grupo de Trabajo en Divul-gación y Salidas de Campo de la Sociedad Botánica Españo-la (SEBOT) hemos impulsado una iniciativa que tiene como objetivo principal fomentar la interacción entre miembros y profesionales de la...

The sclerophyllous syndrome is characterized by well-defined traits (evergreen coriaceous leaves, inconspicuous flowers, and fleshy fruits). It has been hypothesized that lineages displaying the sclerophyllous syndrome show lower speciation rates than non-sclerophyllous lineages after the establishment of the mediterranean climate. Daphne gnidium d...

In this study we assessed karyotype size and symmetry for a comprehensive taxonomic and geographic representation ofHelianthemum and reconstructed chromosome number evolution in the genus. Using root tips, we photographed mitotic metaphase spreads to obtain chromosome number, total haploid (monoploid) length of the chromosome set (THL), karyotype f...

Premise: Divergence of floral morphology and breeding systems are often expected to be linked to angiosperm diversification and environmental niche divergence. However, available evidence for such relationships remain idiosyncratic, due to different taxonomic, geographical and time scales. The Palearctic genus Helianthemum shows the highest divers...

Background and aims: The Canary Islands have strong floristic affinities with the Mediterranean Basin. One of the most characteristic and diverse vegetation belt of the archipelago is the thermophilous woodland (between 200 and 900 m.a.s.l.). This thermophilous plant community consists of many non-endemic species shared with the Mediterranean Flor...

Con objeto de fomentar el interés por la botánica, surgió la idea de organizar el I Biomaratón de Flora Española: un evento de ciencia ciudadana en el que personas de todo el país salieron a fotografiar el mayor número posible de plantas. Se realizó utilizando la plataforma de ciencia ciudadana iNaturalist, y se vertebró por medio de coordinadores...

Molecular systematics requires the establishment of a robust phylogenetic framework including extensive geographical and taxonomic sampling. In this work, we proposed systematic changes in the genus Helianthemum based on phylogenetic trees obtained by both maximum likelihood and Bayesian analyses of GBS data. The implications of these phylogenetic...

The Mediterranean Basin represents an attractive area for reliable reconstructions of the spatio-temporal evolution of plant lineages due to its great number of explosive radiations and well-known paleoecological history. The genus Helianthemum is one of the most representative plant lineages in the Mediterranean ecosystems due to its abundance, di...

The biogeographic history and the degree of environmental niche conservatism provide essential clues to decipher the underlying macroevolutionary processes of species diversification and to understand contemporary patterns of biodiversity. The genus Helianthemum constitutes an excellent case study to investigate the impact of the geo-climatic chang...

Background and aims: Several biogeographic models have been proposed to explain the colonization and diversification patterns of Macaronesian lineages. In this study, we calculated the diversification rates and explored what model better explains the current distribution of the 15 endemic species to the Canary Islands belonging to Helianthemum sec...

Background and Aims Several biogeographic models have been proposed to explain the colonization and diversification patterns of Macaronesian lineages. In this study, we calculated the diversification rates and explored what model better explains the current distribution of the 15 endemic species to the Canary Islands belonging to Helianthemum sect....

In this study, we explored if a species-rich Canarian lineage belonging to the genus Helianthemum has diversified following a stepping-stone model of dispersal (with or without ulterior intra-island speciation) vs. a model of inter-island dispersal to similar ecological zones. Our results provide evidences for both inter- and intra-island allopatri...

Endemismo ibérico con dos metapoblaciones separadas más de 500 km, desde la Sierra de Gádor hasta en el Sistema Ibérico. En ambos extremos consta de subpoblaciones fragmentadas, algunas de muy pocos individuos, sometidas a estocasticidad ambiental y demográfica.

Helianthemum squamatum is a specialist gypsophile, the only species of a recently diverged lineage in subgenus Helianthemum characterized by having the lowest chromosome number in the genus (n = 5). With the hypothesis of great genome reorganization in the lineage of H. squamatum, we (1) modelled the evolution of the chromosome number in the genus...

A robust phylogenetic framework, in terms of extensive geographical and taxonomic sampling, well-resolved species relationships and high certainty of tree topologies and branch length estimations, is critical in the study of macroevolutionary patterns. Whereas Sanger sequencing-based methods usually recover insufficient phylogenetic signal, especia...

Unraveling the relationships between ecological, functional traits and genetic diversity of narrow endemic plants provide opportunities for understanding how evolutionary processes operate over local spatial scales and ultimately how diversity is created and maintained. To explore these aspects in Sierra Nevada, the core of the Mediterranean Betic-...

RESUMEN Dadas las amenazas actuales sobre la biodiversidad del planeta, es crítico desentrañar los mecanis-mos evolutivos responsables de la formación de los puntos calientes de biodiversidad («hotspots»). Sierra Nevada es un «hotspot» en la cuenca mediterránea, donde una compleja historia geológica y climática ha creado diversos hábitats a los que...

Helianthemum is the largest, most widely distributed and most taxonomically complex genus of the Cistaceae. To examine the intrageneric phylogenetic relationships in Helianthemum, we used sequence data from plastid DNA (ndhF, psbA-trnH, trnL-trnF) and the nuclear ITS region. The ingroup consisted of 95 species and subspecies (2 subgenera, 10 sectio...

INTRODUCCIÓN La conservación de la Biodiversidad debe considerar la biología y la historia de las especies y sistemas. La Filogenia constituye una excelente herramienta en Biología de la Conservación pues permite (i) delimitar unidades evolutivas (que deben ser el objeto de los planes de conservación), (ii) inferir los procesos que han generado cam...

[This corrects the article DOI: 10.1371/journal.pone.0159484.].

INTRODUCTION Helianthemum is the largest and the most widely distributed genus in the family Cistaceae(120 taxa). It is characterized by complex systematics and taxonomy. The Old World genusHelianthemum has been considereda close relative of the New World genus Crocanthemum(Guzmán & Vargas, 2009), having even been treated as a single genus(Dunal, 1...

Integration of unexpected discoveries about charismatic species can disrupt their well-established recovery plans, particularly when this requires coordinate actions among the different governments responsible. The Critically Endangered Coronopus navasii (Brassica-ceae) was considered a restricted endemism to a few Mediterranean temporary ponds in...

Histogram of the sum of squared deviation for each of the four fossil nodes when used as single calibration point. (PDF)

List of the studied material of Lepidium s.l. used for the phylogenetic-based analyses. (DOCX)

List of the studied material of Malvidae used for the divergence age estimate. (DOCX)

Maximum Clade Credibility tree obtained from the Bayesian analysis implemented in BEAST of the matK plastid gene from 79 Malvidae sequences using Gerrardina (Huertales) and Tapiscia (Crossosomatales) as outgroup. Green circles highlight nodes selected as calibration points for the Lepidum divergence age estimation. Nodes used as calibration points...

Niche suitability maps resulting from the sixth algorithms applied to model the species distribution accounting only for climate and topographic predictors but not masked with clay soils layers. (a) Present projections. (f-g) Future conditions under different emissions scenarios. (PDF)

Coronopus navasii growing in the mud. A: detail of a reproductive individual in bloom (Sierra de Gádor); B: detail of the root and basal rosette (Sistema Ibérico). (TIF)

Maximum Clade Credibility tree obtained from the Bayesian analysis implemented in BEAST. Nodes used as calibration points (red asterisks) in each analysis are numbered according to the text. (a) Chronogram from the nrDNA ITS region of 106 samples of Lepidium s.l. plus Hornungia petraea as the outgroup. (b) Chronogram from the plastid trnT-trnL spac...

Results from the Bayes Factor (BF) and Approximate Unbiased (AU) hypothesis test analyses. Bayes Factors for the competing hypotheses are provided. Difference in the Likelihood between the competing hypotheses and the best topology as well as the p-values obtained from the AU test are given. Asterisks indicate evidence in favor to that hypothesis f...

Mean ± SD of AUC scores for the six algorithms used in distribution models. (DOCX)

Las salidas de campo ofrecen incontables ventajas desde el punto de vista educativo, promoviendo el aprendizaje significativo de los alumnos. Sin embargo, éstas se realizan de manera poco habitual por parte de la mayoría de los docentes debido a las dificultades de planificación. Este trabajo ofrece una metodología sencilla que puede servir de refe...

New data concerning the presence of Coronopus navasii (Brassicaceae) in the Iberian System. Information on two new localities of Coronopus navasii Pau found in the Iberian System is provided. The conservation status of the species in this geographical area is discussed in the light of the last field works.

Information on two new localities of Coronopus navasii Pau found in the Iberian System is provided. The conservation status of the species in this geographical area is discussed in the light of the last field works.