20 research outputs found
Incorporating Biotic Information in Species Distribution Models: A Coregionalized Approach
In this work, we discuss the use of a methodological approach for modelling spatial
relationships among species by means of a Bayesian spatial coregionalized model. Inference and
prediction is performed using the integrated nested Laplace approximation methodology to reduce
the computational burden. We illustrate the performance of the coregionalized model in species
interaction scenarios using both simulated and real data. The simulation demonstrates the better
predictive performance of the coregionalized model with respect to the univariate models. The case
study focus on the spatial distribution of a prey species, the European anchovy (Engraulis encrasicolus),
and one of its predator species, the European hake (Merluccius merluccius), in the Mediterranean sea.
The results indicate that European hake and anchovy are positively associated, resulting in improved
model predictions using the coregionalized model.Postprin
Extreme genomic erosion after recurrent demographic bottlenecks in the highly endangered Iberian lynx
Background: Genomic studies of endangered species provide insights into their evolution and demographic history, reveal patterns of genomic erosion that might limit their viability, and offer tools for their effective conservation. The Iberian lynx (Lynx pardinus) is the most endangered felid and a unique example of a species on the brink of extinction.
Results: We generate the first annotated draft of the Iberian lynx genome and carry out genome-based analyses of lynx demography, evolution, and population genetics. We identify a series of severe population bottlenecks in the history of the Iberian lynx that predate its known demographic decline during the 20th century and have greatly impacted its genome evolution. We observe drastically reduced rates of weak-to-strong substitutions associated with GC-biased gene conversion and increased rates of fixation of transposable elements. We also find multiple signatures of genetic erosion in the two remnant Iberian lynx populations, including a high frequency of potentially deleterious variants and substitutions, as well as the lowest genome-wide genetic diversity reported so far in any species.
Conclusions: The genomic features observed in the Iberian lynx genome may hamper short- and long-term viability through reduced fitness and adaptive potential. The knowledge and resources developed in this study will boost the research on felid evolution and conservation genomics and will benefit the ongoing conservation and management of this emblematic species
Severity dependent distribution of impairments in PSP and CBS: Interactive visualizations
BACKGROUND: Progressive supranuclear palsy (PSP) -Richardson's Syndrome and Corticobasal Syndrome (CBS) are the two classic clinical syndromes associated with underlying four repeat (4R) tau pathology. The PSP Rating Scale is a commonly used assessment in PSP clinical trials; there is an increasing interest in designing combined 4R tauopathy clinical trials involving both CBS and PSP. OBJECTIVES: To determine contributions of each domain of the PSP Rating Scale to overall severity and characterize the probable sequence of clinical progression of PSP as compared to CBS. METHODS: Multicenter clinical trial and natural history study data were analyzed from 545 patients with PSP and 49 with CBS. Proportional odds models were applied to model normalized cross-sectional PSP Rating Scale, estimating the probability that a patient would experience impairment in each domain using the PSP Rating Scale total score as the index of overall disease severity. RESULTS: The earliest symptom domain to demonstrate impairment in PSP patients was most likely to be Ocular Motor, followed jointly by Gait/Midline and Daily Activities, then Limb Motor and Mentation, and finally Bulbar. For CBS, Limb Motor manifested first and ocular showed less probability of impairment throughout the disease spectrum. An online tool to visualize predicted disease progression was developed to predict relative disability on each subscale per overall disease severity. CONCLUSION: The PSP Rating Scale captures disease severity in both PSP and CBS. Modelling how domains change in relation to one other at varying disease severities may facilitate detection of therapeutic effects in future clinical trials
Tratamientos Psicológicos Empíricamente Apoyados Para Adultos: Una Revisión Selectiva [Evidence-Based Psychological Treatments for Adults: A Selective Review]
Antecedentes: los tratamientos psicológicos han mostrado su efi cacia,
efectividad y efi ciencia para el abordaje de los trastornos mentales; no
obstante, considerando el conocimiento científi co generado en los últimos
años, no se dispone de trabajos de actualización en español sobre cuáles
son los tratamientos psicológicos con respaldo empírico. El objetivo fue
realizar una revisión selectiva de los principales tratamientos psicológicos
empíricamente apoyados para el abordaje de trastornos mentales en personas
adultas. Método: se recogen niveles de evidencia y grados de recomendación
en función de los criterios propuestos por el Sistema Nacional de Salud
de España (en las Guías de Práctica Clínica) para diferentes trastornos
psicológicos. Resultados: los resultados sugieren que los tratamientos
psicológicos disponen de apoyo empírico para el abordaje de un amplio
elenco de trastornos psicológicos. El grado de apoyo empírico oscila de bajo
a alto en función del trastorno psicológico analizado. La revisión sugiere
que ciertos campos de intervención necesitan una mayor investigación.
Conclusiones: a partir de esta revisión selectiva, los profesionales de la
psicología podrán disponer de información rigurosa y actualizada que les
permita tomar decisiones informadas a la hora de implementar aquellos
procedimientos psicoterapéuticos empíricamente fundamentados en
función de las características de las personas que demandan ayuda.
// Evidence-Based Psychological Treatments for Adults: A Selective Review. Background: Psychological treatments have shown their effi cacy,
effectiveness, and effi ciency in dealing with mental disorders. However,
considering the scientifi c knowledge generated in recent years, in the
Spanish context, there are no updating studies about empirically supported psychological treatments. The main goal was to carry out a selective
review of the main empirically supported psychological treatments for
mental disorders in adults. Method: Levels of evidence and degrees of recommendation were collected based on the criteria proposed by the Spanish National Health System (Clinical Practice Guidelines) for different
psychological disorders. Results: The results indicate that psychological
treatments have empirical support for the approach to a wide range of
psychological disorders. These levels of empirical evidence gathered range from low to high depending on the psychological disorder analysed.
The review indicates the existence of certain fi elds of intervention that
need further investigation. Conclusions: Based on this selective review,
psychology professionals will be able to have rigorous, up-to-date information that allows them to make informed decisions when implementing
empirically based psychotherapeutic procedures based on the characteristics of the people who require help
Relationships between agronomic factors and epidemics of Phytophthora branch canker of citrus in southwestern Spain
[EN] Phytophthora branch canker, caused by Phytophthora citrophthora, has been an increasing problem in clementine (Citrus reticulata) production in Spain during last years. The disease was particularly severe in the new citrus-growing areas of the southwestern coastal areas in Huelva Province. Recent studies revealed that disease emergence was not related to either genetic drift or host specificity changes in P. citrophthora population. Therefore, the possible association of agronomic factors with the disease was investigated. A total of 110 orchards were selected arbitrarily from the main citrus-growing areas in Huelva Province. The presence of branch cankers together with agronomic factors including soils, cultivars, rootstocks, irrigation, pruning, techniques to improve fruit production, fungicide treatments, presence of brown rot of fruit and frost damage were recorded. Logistic regression analysis was used to detect correlations between the agronomic factors studied and disease prevalence. Phytophthora branch canker was significantly associated with mature clementine orchards. Sweet orange and hybrid cultivars as well as young clementine orchards were less affected by the disease. Although disease was less frequent in Salorthid soils, alternative high resolution procedures are required to draw conclusions about the effect of soil properties on disease prevalence. As in other Phytophthora-induced diseases, soil flooding during the rainy season was correlated positively with the prevalence of branch cankers. Improving fruit production by branch scoring showed a strong positive correlation with Phytophthora branch canker. This is the first time that girdling has been associated with Phytophthora disease epidemics on a fruit tree crop, but further research is needed to determine the cause of this relationship. Cultural practices including pruning, regulated deficit irrigation, additional phosphonate sprays, and abiotic and disease factors such as frost damage and presence of brown rot of fruit were not significantly correlated with disease prevalence. © 2012 KNPV.This research was partially funded by Asociacion de Citricultores de la Provincia de Huelva. We thank M. M. Dewdney (CREC-IFAS, University of Florida), C. Mesejo (IAM, Universidad Politecnica de Valencia), and two anonymous reviewers for their valuable comments.Vicent, A.; Botella-Rocamora, P.; Lopez-Quilez, A.; De La Roca, E.; Bascon, J.; García Jiménez, J. (2012). Relationships between agronomic factors and epidemics of Phytophthora branch canker of citrus in southwestern Spain. European Journal of Plant Pathology. 133(3):577-584. doi:10.1007/s10658-011-9930-zS5775841333Álvarez, L. A., Vicent, A., De la Roca, E., Bascón, J., Abad-Campos, P., Armengol, J., & García-Jiménez, J. (2008a). Branch cankers on citrus trees in Spain caused by Phytophthora citrophthora. Plant Pathology, 57, 84–91.Álvarez, L. A., Vicent, A., Soler, J. M., De la Roca, E., Bascón, J., & García-Jiménez, J. (2008b). Comparison of application methods of systemic fungicides to suppress branch cankers in Clementine trees caused by Phytophthora citrophthora. Plant Disease, 92, 1357–1363.Álvarez, L. A., Gramaje, D., Abad-Campos, P., & García-Jiménez, J. (2009a). Seasonal susceptibility of citrus scions to Phytophthora citrophthora and P. nicotianae and the influence of environmental and host-linked factors on infection development. European Journal of Plant Pathology, 124, 621–635.Álvarez, L. A., Gramaje, D., Abad-Campos, P., & García-Jiménez, J. (2009b). Role of the Helix aspersa snail as a vector of Phytophthora citrophthora causing branch cankers on Clementine trees in spain. Plant Pathology, 58, 956–963.Álvarez, L. A., León, M., Abad-Campos, P., García-Jiménez, J., & Vicent, A. (2011). 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Duncan (Eds.), Citrus health management (pp. 126–135). St. Paul, MN: APS Press, Inc.Graham, J. H., Timmer, L. W., Drouillard, D. L., & Peever, T. L. (1998). Characterization of Phytophthora spp. causing outbreaks of citrus brown rot in Florida. Phytopathology, 88, 724–729.Ippolito, A., Nigro, F., Lima, G., & Salerno, M. (1994). Phytophthora gummosis and root rot of citrus as influenced by girdling. In Proceedings of the Ninth Congress of the Mediterranean Phytopathological Union. Kusadasi, 1994 (pp. 109–111). MPU and Turkish Phytopathological Society.Jeffers, S. N., & Martin, S. B. (1986). Comparison of two media selective for Phytophthora and Pythium species. Plant Disease, 70, 1038–1043.Mila, A. L., Carriquiry, A. L., & Yang, X. B. (2004). Logistic regression modeling of prevalence of soybean Sclerotinia stem rot in the northcentral region of the United States. Phytopathology, 94, 102–110.Palti, J. (1981). Cultural practices and infectious crop diseases (p. 242). 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Valencia: Generalitat Valenciana, Consellería d’Agricultura i Pesca. 206 pp.Verniere, C., Cohen, S., Raffanel, B., Dubois, A., Venard, P., & Panabieres, F. (2004). Variability in pathogenicity among Phytophthora spp. isolated from citrus in Corsica. Journal of Phytopathology, 152, 476–483.White, T. J., Bruns, T., Lee, S., & Taylor, J. W. (1990). Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetic. In M. A. Innis, D. H. Gelfand, J. J. Sninsky, & T. J. White (Eds.), PCR Protocols, A guide to methods and applications (pp. 315–322). San Diego: Academic.Zadoks, J. C., & Schein, R. D. (1979). Epidemiology and plant disease management (p. 427). New York: Oxford University Press.Zewdea, T., Fininsaa, C., Sakhujaa, P. K., & Ahmed, S. (2007). Association of white rot (Sclerotium cepivorum) of garlic with environmental factors and cultural practices in the North Shewa highlands of Ethiopia. Crop Protection, 26, 1566–1573
Bayesian spatio-temporal discard model in a demersal trawl fishery
Spatial management of discards has recently been proposed as a useful tool for the protection of juveniles, by reducing discard rates and can be used as a buffer against management errors and recruitment failure. In this study Bayesian hierarchical spatial models have been used to analyze about 440 trawl fishing operations of two different metiers, sampled between 2009 and 2012, in order to improve our understanding of factors that influence the quantity of discards and to identify their spatio-temporal distribution in the study area. Our analysis showed that the relative importance of each variable was different for each metier, with a few similarities. In particular, the random vessel effect and seasonal variability were identified as main driving variables for both metiers. Predictive maps of the abundance of discards and maps of the posterior mean of the spatial component show several hot spots with high discard concentration for each metier. We argue how the seasonal/spatial effects, and the knowledge about the factors influential to discarding, could potentially be exploited as potential mitigation measures for future fisheries management strategies. However, misidentification of hotspots and uncertain predictions can culminate in inappropriate mitigation practices which can sometimes be irreversible. The proposed Bayesian spatial method overcomes these issues, since it offers a unified approach which allows the incorporation of spatial random-effect terms, spatial correlation of the variables and the uncertainty of the parameters in the modeling process, resulting in a better quantification of the uncertainty and accurate predictions
Accounting for preferential sampling in species distribution models
cient than existing MCMC methods. From a statistical point of view, we interpret the
data as a marked point pattern, where the sampling locations form a point pattern
and the measurements taken in those locations (i.e., species abundance or occur‐
rence) are the associated marks. Inference and prediction of species distribution is
performed using a Bayesian approach, and integrated nested Laplace approximation
(INLA) methodology and software are used for model fitting to minimize the compu‐
tational burden. We show that abundance is highly overestimated at low abundance
locations when preferential sampling effects not accounted for, in both a simulated
example and a practical application using fishery data. This highlights that ecologists
should be aware of the potential bias resulting from preferential sampling and ac‐
count for it in a model when a survey is based on non‐randomized and/or non‐sys‐
tematic sampling
Erratum: Caveolin-1 Modulates Mechanotransduction Responses to Substrate Stiffness through Actin-Dependent Control of YAP (Cell Reports (2018) 25(6) (1622–1635.e6), (S2211124718316000) (10.1016/j.celrep.2018.10.024))
(Cell Reports 25, 1622–1635.e1–e6; November 6, 2018) In the originally published version of this article, Figure 1D showed four merged channel accessory images, of which two of them had been mistakenly swapped with each other. While this mistake does not affect at all the interpretation and quality assessment of the experiment, the original image has been replaced by a corrected version in the online article. Both the original and the corrected version of the panel are also displayed below. The authors regret this error. [Figure presented
Protist enteroparasites in wild boar (Sus scrofa ferus) and black Iberian pig (Sus scrofa domesticus) in southern Spain: a protective effect on hepatitis E acquisition?
Parkinson's disease severity at 3 years can be predicted from non-motor symptoms at baseline
Objective: The aim of this study is to present a predictive model of Parkinson's disease (PD) global severity, measured with the Clinical Impression of Severity Index for Parkinson's Disease (CISI-PD). Methods: This is an observational, longitudinal study with annual follow-up assessments over 3 years (four time points). A multilevel analysis and multiple imputation techniques were performed to generate a predictive model that estimates changes in the CISI-PD at 1, 2, and 3 years. Results: The clinical state of patients (CISI-PD) significantly worsened in the 3-year follow-up. However, this change was of small magnitude (effect size: 0.44). The following baseline variables were significant predictors of the global severity change: baseline global severity of disease, levodopa equivalent dose, depression and anxiety symptoms, autonomic dysfunction, and cognitive state. The goodness-of-fit of the model was adequate, and the sensitive analysis showed that the data imputation method applied was suitable. Conclusion: Disease progression depends more on the individual's baseline characteristics than on the 3-year time period. Results may contribute to a better understanding of the evolution of PD including the non-motor manifestations of the disease.The Spanish Longitudinal PD Patient Study (Estudio longitudinal de pacientes con enfermedad de Parkinson) was supported by an Intramural Research Programme grant from the Carlos III Institute of Health (Code: EPY1271/05). Partial funding was also obtained from the following grants: ENVACES (MINECO/FEDER/UE, ref. CSO2015-64115-R) and ENCAGE-CM (Comunidad de Madrid, ref. S2015/HUM-3367