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Modelling fuel loads of understorey vegetation and forest floor components in pine stands in NW Spain

Forest Ecosystems 2022年第6期9卷 775-789页

作者： Jose A.Vega Stefano Arellano-Perez Juan Gabriel Alvarez-Gonzalez Cristina Fernandez Enrique Jimenez Pedro Cuinas Jose María Fernandez-Alonso Daniel J.Vega-Nieva Fernando Castedo-Dorado Cecilia Alonso-Rego Teresa Fontúrbel Ana Daría Ruiz-gonzalez Centro de Investigacion Forestal de Lourizan PO Box 12736080PontevedraSpain Unidad de Gestion Ambiental y Forestal Sostenible(UXAFORES) Departamento de Ingeniería AgroforestalEscuela Politecnica Superior de IngenieríaUniversidad de Santiago de CompostelaCampus Universitario s/n27002LugoSpain Facultad de Ciencias Forestales Universidad Juarez del Estado de DurangoRío Papaloapan y Blvd.Durango s/nCol.Valle del Sur34120DurangoMexico Departamento de Ingeniería y Ciencias Agrarias Universidad de LeonCampus de Ponferrada24401PonferradaSpain

In this study,310 destructively sampled plots were used to develop two equation systems for the three main pine species in NW Spain(P.pinaster;P.radiata and P.sylvestris):one for estimating loads of understorey fuel components by size and condition(live and dead)and another one for forest floor fuels.Additive systems of equations were simultaneously fitted for estimating fuel loads using overstorey,understorey and forest floor variables as regressors.The systems of equations included both the effect of pine species and the effect of understorey compositions dominated by ferns-brambles or by woody species,due to their obvious structural and physiological differences.In general,the goodness-of-fit statistics indicated that the estimates were reasonably robust and accurate for all of the fuel fractions.The best results were obtained for total understorey vegetation,total forest floor and raw humus fuel loads,with more than 76%of the observed variability explained,whereas the poorest results were obtained for coarse fuel loads of understory vegetation with a 53%of observed variability explained.To reduce the overall costs associated with the field inventories necessary for operational use of the models,the additive systems were fitted again using only overstorey variables as potential regressors.Only relationships for fine(<6 mm)and total understorey vegetation and total forest floor fuel loads were obtained,indicating the complexity of the forest overstorey-understorey and overstorey-forest floor relationships.Nevertheless,these models explained around 52%of the observed variability.Finally,equations estimating the total understorey vegetation and the total forest floor fuel loads based only on canopy cover were fitted.These models explained only 26%-32%of the observed variability;however,their main advantage is that although understorey vegetation in forested landscapes is largely invisible to remote sensing,canopy cover can be estimated with moderate accuracy,allowing for landscape-scale estimates of total fuel lo

关键词： Area-based approach Additive equation systems Live and dead fine fuel Pinus pinaster Pinus radiata Pinus sylvestris

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Temporal stability and directional change in a color cline of a marine snail from NW Spain

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Current Zoology 2024年第2期70卷 163-173页

作者： juan Gefaell Ramon Vigo A.Honorato gonzalez-Vazquez juan Galindo Emilio Rolan-alvarez Centro de Investigacion Marina Universidade de VigoDepartamento de BioquimicaGenetica e Inmunologia36310 VigoSpain

The evolution and maintenance of color clines is a classic topic of research in evolutionary ecology.However,studies analyzing the temporal dynamics of such clines are much less frequent,due to the difficulty of obtaining reliable data about past color distributions along environmen-tal gradients.In this article,we describe a case of decades-long temporal stability and directional change in a color cline of the marine snail Littorina saxatilis along the coastal inlet of the Ria de Vigo(NW Spain).L.saxatilis from this area shows a clear color cline with 3 distinct areas from the innermost to the more wave-exposed localities of the Ria:the inner,protected localities show an abundance of fawn-like individuals;the intermediate localities show a high diversity of colors;and the outer,wave-exposed localities show populations with a high frequency of a black and lineated morph.We compare data from the 1970s and 2022 in the same localities,showing that the cline has kept relatively stable for at least over half a century,except for some directional change and local variability in the frequency of certain morphs.Multiple regression analyses and biodiversity measures are presented to provide clues into the selective pressures that might be involved in the maintenance of this color cline.Future research avenues to properly test the explanatory power of these selective agents as well as the possible origins of the cline are discussed.

关键词： clinal variation color polymorphism ecological gradient Littorina saxatilis natural selection wave exposure.

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Assessing a novel modelling approach with high resolution UAV imagery for monitoring health status in priority riparian forests

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Forest Ecosystems 2021年第4期8卷 810-830页

作者： juan Guerra-Hernandez Ramon A.Diaz-Varela juan gabriel Avarez-gonzalez Patricia Maria Rodriguez-gonzalez edata Centro de iniciativas empresariaisFundacion CEL.O Palomar s/n27004 LugoSpain Forest Research Centre School of AgricultureUniversity of LisbonInstituto Superior de Agronomia(ISA)Tapada da Ajuda1349-017 LisbonPortugal Biodiversity and Applied Botany Unit(GI BIOAPLIC 1809) Department of BotanyEscuela Politecnica SuperiorR/Benigno LedoUniversity of Santiago de CompostelaCampus Universitario27002 LugoSpain Sustainable Forest Management Unit(UXFS) Department of Agroforestry EngineeringEscuela Politecnica SuperiorR/Benigno LedoUniversity of Santiago de CompostelaCampus UniversitarioE-27002 LugoSpain

Background:Black alder(Alnus glutinosa)forests are in severe decline across their area of distribution due to a disease caused by the soil-borne pathogenic Phytophthora alni species complex(class Oomycetes),“alder Phytopththora”.Mapping of the different types of damages caused by the disease is challenging in high density ecosystems in which spectral variability is high due to canopy heterogeneity.Data obtained by unmanned aerial vehicles(UAVs)may be particularly useful for such tasks due to the high resolution,flexibility of acquisition and cost efficiency of this type of data.In this study,A.glutinosa decline was assessed by considering four categories of tree health status in the field:asymptomatic,dead and defoliation above and below a 50% threshold.A combination of multispectral Parrot Sequoia and UAV unmanned aerial vehicles-red green blue(RGB)data were analysed using classical random forest(RF)and a simple and robust three-step logistic modelling approaches to identify the most important forest health indicators while adhering to the principle of parsimony.A total of 34 remote sensing variables were considered,including a set of vegetation indices,texture features from the normalized difference vegetation index(NDVI)and a digital surface model(DSM),topographic and digital aerial photogrammetry-derived structural data from the DSM at crown level.Results:The four categories identified by the RF yielded an overall accuracy of 67%,while aggregation of the legend to three classes(asymptomatic,defoliated,dead)and to two classes(alive,dead)improved the overall accuracy to 72% and 91% respectively.On the other hand,the confusion matrix,computed from the three logistic models by using the leave-out cross-validation method yielded overall accuracies of 75%,80% and 94% for four-,three-and two-level classifications,respectively.Discussion:The study findings provide forest managers with an alternative robust classification method for the rapid,effective assessment of areas affected and non-affected by the disease,thus

关键词： Alder RPAS Multi-spectral Defoliation Texture variables 3D point cloud Tree health monitoring

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A nonlinear relapse model with disaggregated contact rates:Analysis of a forward-backward bifurcation

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Infectious Disease Modelling 2023年第3期8卷 769-782页

作者： Jimmy Calvo-Monge Fabio Sanchez juan gabriel Calvo Dario Mena Escuela de Matematica Universidad de Costa RicaCiudad Universitaria Rodrigo FacioSan Jose11501Costa Rica Centro de Investigacion en Matematica Pura y Aplicada Universidad de Costa RicaCiudad Universitaria Rodrigo FacioSan Jose11501Costa Rica

Throughout the progress of epidemic scenarios,individuals in different health classes are expected to have different average daily contact behavior.This contact heterogeneity has been studied in recent adaptive models and allows us to capture the inherent differences across health statuses better.Diseases with reinfection bring out more complex scenarios and offer an important application to consider contact disaggregation.Therefore,we developed a nonlinear differential equation model to explore the dynamics of relapse phenomena and contact differences across health statuses.Our incidence rate function is formulated,taking inspiration from recent adaptive algorithms.It incorporates contact behavior for individuals in each health class.We use constant contact rates at each health status for our analytical results and prove conditions for different forward-backward bifurcation scenarios.The relationship between the different contact rates heavily in-fluences these conditions.Numerical examples highlight the effect of temporarily recov-ered individuals and initial conditions on infected population persistence.

关键词： Nonlinear relapse Nonlinear incidence MaMthematical model Backward bifurcation Adaptive behavior 2000 MSC 37N25 92B05

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Translating Pathological Brain Activity Primers in Parkinson’s Disease Research

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Research 2024年第1期2023卷 735-752页

作者： Daniela Mirzac Svenja L.Kreis Heiko J.Luhmann gabriel gonzalez-Escamilla Sergiu Groppa Movement Disorders and Neurostimulation Department of NeurologyFocus Program Translational NeuroscienceRhine Main Neuroscience NetworkUniversity Medical Center of the Johannes Gutenberg University Mainz55131 MainzGermany Institute of Physiology University Medical Center of the Johannes Gutenberg University Mainz55131 MainzGermany

Translational experimental approaches that help us better trace Parkinson’s disease(PD)pathophysiological mechanisms leading to new therapeutic targets are urgently needed.In this article,we review recent experimental and clinical studies addressing abnormal neuronal activity and pathological network oscillations,as well as their underlying mechanisms and modulation.Our aim is to enhance our knowledge about the progression of Parkinson's disease pathology and the timing of its symptom’s manifestation.Here,we present mechanistic insights relevant for the generation of aberrant oscillatory activity within the cortico-basal ganglia circuits.We summarize recent achievements extrapolated from available PD animal models,discuss their advantages and limitations,debate on their differential applicability,and suggest approaches for transferring knowledge on disease pathology into future research and clinical applications.

关键词： clinical knowledge insight

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Brain network correlates of epilepsy occurrence in multiple sclerosis and neuroinflammation

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Neural Regeneration Research 2023年第8期18卷 1717-1718页

作者： Dumitru Ciolac gabriel gonzalez-Escamilla Yaroslav Winter Vinzenz Fleischer Matthias Grothe Sergiu Groppa Department of Neurology Focus Program Translational NeuroscienceRhine Main Neuroscience Network(rmn2)University Medical Center of the Johannes Gutenberg University MainzMainzGermany State University of Medicine and Pharmacy“Nicolae Testemitanu” ChisinauRepublic of Moldova Department of Neurology Institute of Emergency MedicineChisinauRepublic of Moldova Mainz Comprehensive Epilepsy and Sleep Medicine Center Department of NeurologyJohannes Gutenberg University MainzMainzGermany Department of Neurology Philipps-UniversityMarburgGermany Department of Neurology Heinrich Heine UniversityDüsseldorfGermany

Multiple sclerosis(MS),the most common inflammatory condition of the central nervous system in young adults,is characterized by immunemediated demyelination and neurodegeneration that translate into heterogeneous clin... 详细信息

关键词： epilepsy inflammation sclerosis

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Use of recycled concrete aggregates in asphalt mixtures for pavements:A review

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第5期9卷 725-741页

作者： juan gabriel Bastidas-Martínez Fredy Alberto Reyes-Lizcano Hugo Alexander Rondón-Quintana Faculty of Engineering Universidad Piloto de ColombiaBogotáDC 110231Colombia Faculty of Engineering Pontificia Universidad JaverianaBogotáDC 110131Colombia Facultad del Medio Ambiente y Recursos Naturales Universidad Distrital Francisco Joséde CaldasBogotáDC 110131Colombia

Large quantities of natural aggregates(NA)are required in the manufacturing of asphalt mixtures for pavements.The extraction of NA generates high environmental impacts that negatively affect environmental preservation and conservation.Diverse alternative materials obtained in construction and demolition processes in civil construction worked have been studies as possible replacements for NA,with the purpose of reducing these environmental impacts.The foregoing study presents a state of knowledge review referring to the use of recycled concrete aggregates(RCA)when these are used in the manufacturing of asphalt mixtures(mainly hot-mix asphalt HMA type).Environmental aspects are presented,as well as possible benefits and limitations of using RCA as replacements for NA in asphalt mixtures.However,it is not possible to establish a behavior pattern,since the characteristics of the RCA are very heterogeneous and vary from the original source of the concrete.It is highlighted from the literature that RCA has a wide potential for use in the manufacture of asphalt mixtures,since in most studies,the mixtures with these materials comply the quality requirements contemplated by the construction specifications,mainly in low-volume roads.Additionally,based on the literature review,some recommendations and suggestions are presented for future research.

关键词： Recycled concrete aggregates Asphalt mixtures Mechanical properties Volumetric composition

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Smart Contract to Traceability of Food Social Selling

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Computers, Materials & Continua 2023年第3期74卷 4703-4728页

作者： Cristian Valencia-Payan JoséFernando Grass-Ramírez Gustavo Ramirez-gonzalez juan Carlos Corrales University of Cauca Calle 5#4-70190003Popayan-CaucaColombia

Traditionally,food sustainability has been considered solely in the stage of agricultural production.However,globalization,the expansion of the food production industry,and the emergence of supermarket chains that control the retail food market require specific significant changes in supply chains in the food sector and,therefore,we need to address the economic,social,and environmental impacts of these events.On the other hand,social selling has increased rapidly in recent years,with a further boom,following current events related to the coronavirus disease(COVID-19).This explosion of social sales,where there are usually no control and regulation entities,can bring problems associated with mishandling items.In this paper,we expose how Blockchain technology supports the traceability of social sales by validating the data provided by the chain participants such as digital health passports,production and transport data in the sale process;the proposed solution generates recommendations on productmanagement considering the agreements previously made by the network actors.To evaluate the proposed smart contracts,we useHyperledger Caliper,obtaining an average throughput of 12.6 transactions per second and an average latency of 0.3 s for the asset update process.We also use a study case to evaluate the proposed project platform’s selling-transport stage using Internet of Things(IoT)sensors.

关键词： Blockchain reliability smart contracts social selling traceability artisan sweets

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Choroid plexus imaging to track neuroinflammation—a translational model for mouse and human studies

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Neural Regeneration Research 2023年第3期18卷 521-522页

作者： Muthuraman Muthuraman Mohammadsaleh Oshaghi Vinzenz Fleischer Dumitru Ciolac Ahmed Othman Sven G.Meuth gabriel gonzalez-Escamilla Sergiu Groppa Department of Neurology Focus Program Translational NeuroscienceRhine Main Neuroscience Network(rmn2)University Medical Center of the Johannes Gutenberg University MainzMainzGermany Department of Neuroradiology University Medical Center of the Johannes Gutenberg University MainzMainzGermany Department of Neurology Medical FacultyHeinrich-Heine-UniversityDüsseldorfGermany

The choroid plexus(ChP)is a highly vascularized and secretory tissue in each of the brain ventricles that represents the key structure between the blood and the cerebrospinal fluid(CSF).Besides its essential role in CSF production and brain waste clearance pathways,the ChP also contributes to the regulation of central nervous system(CNS)immunosurveillance(Ghersi-Egea et al.,2018).Indeed,the ChP forming the blood-CSF barrier(BCSFB)regulates the entry of immune cells and solute molecules into the brain and vice versa.When antigen-specific,autoreactive immune activation occurs in the periphery,inflammatory cells migrate through the brain barriers towards the CNS(Strominger et al.,2018),initiating neuroinflammatory diseases such as multiple sclerosis(MS).

关键词： al. plexus inflammation

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Modifying the progression of Parkinson's disease through movement interventions:multimodal quantification of underlying mechanisms

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Neural Regeneration Research 2024年第8期19卷 1651-1652页

作者： Manuel Bange Damian Marc Herz Dumitru Ciolac gabriel gonzalez-Escamilla Sergiu Groppa Section of Movement Disorders and Neurostimulation Department of NeurologyFocus Program Translational Neuroscience(FTN)University Medical Center of the Johannes Gutenberg-University MainzMainzGermany

Introduction:Parkinson’s disease(PD)is the most common neurodegenerative movement disorder.The pathological hallmark is the progressive loss of dopaminergic neurons of the substantia nigra pars compacta,which is accompanied by widespread alterations in the structu re and function of distributed brain networks.Togethe r,these processes cause a variety of motor symptoms such as bradykinesia,rigidity,tremor,gait disorders,or difficulties in fine motor control(Bange et al.,2022).

关键词： alterations movement

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