On the link between the coefficient of determination and polarization

In this paper, taking as starting point the link between polarization and dispersion, we reformulate the measure of polarization of Zhang and Kanbur (2001) using the decomposition of the variance instead of the decomposition of the Theil index. The proposed measure is equivalent to the coefficient of determination of an ANOVA Linear Model, that explains the income of the households as a function of any population characteristic e.g. education, gender, occupation etc. This result provides an alternative way to analyze polarization by household characteristics and at the same time allows us to compare sub-populations via the estimated coefficients of the ANOVA model.Polarization, coefficient of determination, ANOVA model.

Datos fitosociológicos sobre las fresnedas guadarrámicas

Tras la revisión fitosociológica de las fresnedas de la Sierra de Guadarrama (España), se proponen los siguientes nuevos sintaxones: Fraxino angustifoliae-Quercetum pyrenaicae subas. serratuletosum tinctoriae y subas. loniceretosum xylostei, y Ficario- Fraxinetum angustifoliae subas. rosetosum corymbiferae y subas. ulmetosum minoris. Se lectotipifica, corrige y enmienda la asociación Fraxino angustifoliae-Quercetum pyrenaicae y se valida la subasociación Ficario-Fraxinetum angustifoliae tamaricetosum africanae.Phytosociological study of Fraxinus angustifolia -forests from Sierra de Guadarrama (Spain). The following new syntaxa are proposed: Fraxino angustifoliae-Quercetum pyrenaicae subas. serratuletosum tinctoriae and subas. loniceretosum xylostei, and Ficario-Fraxinetum angustifoliae subas. rosetosum corymbiferae and subas. ulmetosum minoris. The association Fraxino angustifoliae-Quercetum pyrenaicae is lectotypified, corrected and amended, and the subassociation Ficario-Fraxinetum angustifoliae tamaricetosum africanae is validated

Los tarayales de la depresión del Ebro

La revisión de las comunidades de Tamarix en la depresión del Ebro permite reconocer tres asociaciones: Tamaricetum gallicae Br.-BI. & O. Bolós 1957 (Tamaricion africanae Br.-B1. & O. BoIós 1957), riparia y subhalófila; Agrostio-Tamaricetum canariensis Cirujano 1981 (Tamaricion boveano-canuriensis Izco, F. Fernández-González & A. Molina 1984), mesohalófila (subass. tamaricetosum canariensis) o hiperhalófila (subass. inuletosum crithmoidis nova); y Suaedo braun-blanquetii-Tamaricetum boveanae (Izco & al. 1984) ass.nova (Tamaricion boveano-canariensis), hiperhalófila y restringida a la parte más baja y oriental de la depresión.Tamarix-communities belonging to the order Tamaricetalia (class Nerio- Tamaricetea) are phytosociologically reviewed in the Ebro basin. Three associations can be differentiated: Tamaricetum gal/woe Br.-BI. & O. Bolós 1957 (Tamaricion africanae Br.-B1. & O. Bolós 1957), riparian and subhalophilous; Agrostio-Tamaricetum canariensis Cirujano 1981 (Tamaricion boveano-canariensis Izco, F. Fernández-González & A. Molina 1984), mesohalophilous (subass. tamaricetosum canariensis) or hiperhalophilous (subass. inuletosum crithmoidis nova); and Suaedo braun-blanquetii-Tamaricetum boveanae (Izco & al. 1984) ass.nova (Tamaricion boveano-canariensis), hiperhalophilous and restricted to eastern and lower part of the basin

Sobre las comunidades de matorral de la Depresión del Ebro (España)

Sin resume

Nomenclature and syntaxonomic notes on some high-rank syntaxa of the European grassland vegetation

We present descriptions of a new order (Ranunculo cortusifolii-Geranietalia reuteri) and of a new alliance (Stachyo lusitanicae-Cheirolophion sempervirentis) for the herbaceous fringe communities of Macaronesia and of the southwestern Iberian Peninsula, respectively. A new alliance, the Polygalo mediterraneae-Bromion erecti (mesophilous post-cultural grasslands), was introduced for the Peninsular Italy. We further validate and typify the Armerietalia rumelicae (perennial grasslands supported by nutrient-poor soils on siliceous bedrocks at elevations characterized by the submediterranean climate of south-central Balkan Peninsula), the Securigero-Dasypyrion villosae (lawn and fallow-land tall-grass annual vegetation of Italy), and the Cirsio vallis-demoni-Nardion (acidophilus grasslands on siliceous substrates of the Southern Italy). Nomenclatural issues (validity, legitimacy, synonymy, formal corrections) have been discussed and clarified for the following names: Brachypodio-Brometalia, Bromo pannonici-Festucion csikhegyensis, Corynephoro-Plantaginion radicatae, Heleochloion, Hieracio-Plantaginion radicatae, Nardetea strictae, Nardetalia strictae, Nardo-Callunetea, Nardo-Galion saxatilis, Oligo-Bromion, Paspalo-Heleochloetalia, Plantagini-Corynephorion and Scorzoneret alia villosae

Driver drowsiness detection based on respiratory signal analysis

Drowsy driving is a prevalent and serious public health issue that deserves attention. Recent studies estimate around 20% of car crashes have been caused by drowsy drivers. Nowadays, one of the main goals in the development of new advanced driver assistance systems is the trustworthy drowsiness detection. In this paper, a drowsiness detection method based on changes in the respiratory signal is proposed. The respiratory signal, which has been obtained using an inductive plethysmography belt, has been processed in real-time in order to classify the driver’s state of alertness as drowsy or awake. The proposed algorithm is based on the analysis of the respiratory rate variability (RRV) in order to detect the fight against to fall asleep. Moreover, a method to provide a quality level of the respiratory signal is also proposed. Both methods have been combined to reduce false alarms due to changes of measured RRV associated not to drowsiness but body movements. A driving simulator cabin has been used to perform the validation tests and external observers have rated the drivers’ state of alertness in order to evaluate the algorithm performance. It has been achieved a specificity of 96.6%, sensitivity of 90.3% and Cohen’s Kappa agreement score of 0.75 on average across all subjects through a leave-one-subject-out cross-validation. A novel algorithm for driver’s state of alertness monitoring through the identification of the fight against to fall asleep has been validated. The proposed algorithm may be a valuable vehicle safety system to alert drowsiness while drivingPeer ReviewedPostprint (published version

Datos fitosociológicos sobre las fresnedas guadarrámicas

Phytosociological study of Fraxinus angustifolia -forests from Sierra de Guadarrama (Spain). The following new syntaxa are proposed: Fraxino angustifoliae-Quercetum pyrenaicae subas. serratuletosum tinctoriae and subas. loniceretosum xylostei, and Ficario-Fraxinetum angustifoliae subas. rosetosum corym biferae and subas. ulm etosum m inoris. The association Fraxino angustifoliae-Quercetum pyrenaicae is lectotypified, corrected and amended, and the subassociation Ficario-Fraxinetum angustifoliae tamaricetosum africanae is validated.Tras la revisión fitosociológica de las fresnedas de la Sierra de Guadarrama (España), se proponen los siguientes nuevos sintaxones: Fraxino angustifoliae-Quercetum pyrenaicae subas. serratuletosum tinctoriae y subas. loniceretosum xylostei, y Ficario- Fraxinetum angustifoliae subas. rosetosum corymbiferae y subas. ulmetosum minoris. Se lectotipifica, corrige y enmienda la asociación Fraxino angustifoliae-Quercetum pyrenaicae y se valida la subasociación Ficario-Fraxinetum angustifoliae tamaricetosum africanae

Macroecology and ecoinformatics: evaluating the accuracy of the ecological niche models calibrated with species occurrence data with biases and/or errors

Hoy en día es común estudiar los patrones globales de biodiversidad a partir de las predicciones generadas por diferentes modelos de nicho ecológico. Habitualmente, estos modelos se calibran con datos procedentes de bases de datos de libre acceso (e.g. GBIF). Sin embargo, a pesar de la facilidad de descarga y de la accesibilidad de los datos, la información almacenada sobre las localidades donde están presentes las especies suele tener sesgos y errores. Estos problemas en los datos de calibración pueden modificar drásticamente las predicciones de los modelos y con ello pueden enmascarar los patrones macroecológicos reales. El objetivo de este trabajo es investigar qué métodos producen resultados más precisos cuando los datos de calibración incluyen sesgos y cuáles producen mejores resultados cuando los datos de calibración tienen, además de sesgos, errores. Para ello creado una especie virtual, hemos proyectado su distribución en la península ibérica, hemos muestreado su distribución de manera sesgada y hemos calibrado dos tipos de modelos de distribución (Bioclim y Maxent) con muestras de distintos tamaños. Nuestros resultados indican que cuando los datos sólo están sesgados, los resultados de Bioclim son mejores que los de Maxent. Sin embargo, Bioclim es extremadamente sensible a la presencia de errores en los datos de calibración. En estas situaciones, el comportamiento de Maxent es mucho más robusto y las predicciones que proporciona son más ajustadas.In spite of the biases and errors of the open access biodiversity databases we need to take advantage of the occurrences stored in those databases for analyzing the global patterns of biodiversity. Here, we aimed to test which modelling method produces better predictions when calibrated with data samples that have biases and errors. We tested two different methods, a complex one, Maxent, and a simple one, Bioclim. We created a virtual species, sampled its distribution with both, bias and errors, and calibrated the models with those samples. Results indicated that Bioclim produces better predictions than Maxent when calibrated with biased data sets. Bioclim did not overestimate the species’ range and it was able to produce accurate predictions even when calibrated with small and biased data samples (25-50 points). However, when wrong occurrences were included in the calibration samples, Bioclim over-predicted the species’ range. Our experiments indicated that in that case, Maxent predictions remained robust and provided accurate maps. Thus, if the calibration data samples have just biases, Bioclim provided better maps than Maxent. However, when samples have both, biases and wrong occurrences, Maxent model provided better results than Bioclim.Este trabajo se enmarca dentro de los proyectos: “Support of establishment, development and mobility of quality research teams at the Charles University” CZ.1.07/2.3.00/30.0022, financiado por la European Science Foundation y la República Checa (S.Varela); y “Potential effects of climate change on Natura 2000 conservation targets in Castilla-La Mancha (CLICHE)” (Ref. no.: POIC10-0311-0585), financiado por el gobierno de Castilla La-Mancha, España (S. Varela, R. G. Mateos, R. García-Valdés, and F. Fernández-González)

Proposals (33–34) to conserve the name Poo-Astragalion and to conserve the name Poo-Astragaletum sesamei with a conserved type, and requests (5–7) for a binding decision on the name-giving taxa in the same names and the inversion of the name Poo-Astragaletum sesamei

The alliance name Poo-Astragalion has been widely used by Iberian phytosociologists for nearly fifty years to indicate a type of sheep pastures thriving on base-rich substrates. This alliance is currently classified in the order Poetalia bulbosae and class Poetea bulbosae. However, the revision of its original diagnosis highlights that this alliance name must be considered as an alternative name to the largely disused name Medicagini-Brachypodion distachyi. In order to stabilize the nomenclature, we propose the conservation of the traditionally used name Poo-Astragalion. On the other hand, the type association of the alliance (Poo-Astragaletum sesamei) turns out to be a superfluous name for another association neglected in the syntaxonomical literature, the Astragalo scorpioidis-Medicaginetum truncatulae. Hence, with the same objective of stabilizing the nomenclature, we propose the designation of a conserved neotype for the Poo-Astragaletum sesamei and the conservation of this name against the earlier heterotypic synonym in case of union of both associations. At the same time, we propose to complete the two names Poo-Astragalion and Poo-Astragaletum sesamei by selecting Poa bulbosa and Astragalus sesameus as the name-giving taxa, and to invert the name Poo-Astragaletum in accordance with its neotype (Astragalo sesamei-Poetum bulbosae). (33) Poo-Astragalion Rivas Goday et Ladero 1970: 165–169, nom. cons. propos. Typus: Poo-Astragaletum sesamei Rivas-Goday et Ladero 1970: 166–170 (holotypus). (≡) Medicagini-Brachypodion distachyi Rivas-Goday et Rivas-Martínez in Rivas Goday et Ladero 1970: 165–166 (alternative name) [original form: "Medicago-Brachypodion"] (34) Poo-Astragaletum sesamei Rivas-Goday et Ladero 1970: 166–170, nom. cons. et typus cons. propos. [original forms: "Poo-Astragaletum", "Poeto-Astragaletum sesamei"] Typus cons. propos.: neotypus hoc loco (see below). (=) Astragalo scorpioidis-Medicaginetum truncatulae Rivas Goday et Borja 1959 nom. corr. [original form: Astragalo scorpioidis-Medicaginetum tribuloidis nom. inept. (Rivas Goday and Borja 1959: 475, table 2)] Taxonomic reference: Euro+Med (2023). Syntaxonomic reference: Mucina et al. (2016). Abbreviations: EVC = EuroVegChecklist (Mucina et al. 2016); ICPN = 4th edition of the International Code of Phytosociological Nomenclature (Theurillat et al. 2021)