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Functional strategies and distribution of climbing plant communities in different vegetation patches in a subtropical dry forest, central Argentina

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Journal of Plant Ecology 2019年第1期12卷 23-33页

作者： María Cecilia Ferrero sebastián r.zeballos Juan I.Whitworth-Hulse Melisa A.Giorgis Diego E.Gurvich Instituto Multidisciplinario de Biología Vegetal CONICET-Universidad Nacional de CórdobaAv.Vélez Sársfield 1611CP X5016ZAACórdobaArgentina Facultad de Ciencias Exactas Físicas y NaturalesUniversidad Nacional de CórdobaAv.Vélez Sársfield 299CP X5000JJCCórdobaArgentina

Aims In the context of global change,the impacts of forest structure alter-ation on climbing plants in extra-tropical ecosystems are poorly *** also remains little explored,the functional strategies among climbing plant species and its relationship with the local-scale distribution of climbing plant ***,we aimed at three goals:(i)we studied how climbing plant community com-position responds to the modification of the original forest structure in a subtropical dry forest;(ii)we characterized climbing plant spe-cies according to functional traits related to the acquisition and use of resources;and(iii)we examined whether functional strategies at the community level are also responding to vegetation structure change,a much less addressed topic in the ecology of climbing *** The study was carried out in the Chaco forest of Córdoba Mountains,central *** selected 18 patches of‘native forests’,‘shrublands’and‘Ligustrum lucidum forests’.We counted and identified climbing plant individuals in each patch,including woody and herbaceous *** each spe-cies,we measured 10 functional traits:leaf area,leaf area ratio,leaf dry matter content,leaf tensile strength,specific leaf area,stem density,wood saturated water content,inter-node length,petiole length and plant *** compared climbing plant composition,richness and abundance among the three vegeta-tion ***,we assessed trends of functional variation of climbing plant species by performing a principal component ***,we investigated whether simple mean,weighted mean and Functional richness index of principal component analysis(PCA)axes differed among the climbing plant communi-ties of the three vegetation *** Findings Multivariate analysis revealed that climbing plant composition of native forests significantly differed from that of shrublands and *** ***,*** forests had the lowest climb-ing plant species *** var

关键词： vines functional traits Chaco Serrano climbing plant species richness community weighted means

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Mountain invasions on the way:are there climatic constraints for the expansion of alien woody species along an elevation gradient in Argentina?

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Journal of Plant Ecology 2016年第4期9卷 380-392页

作者： Paula A.Tecco Ana I.Pais-Bosch Guillermo Funes Paula I.Marcora sebastián r.zeballos Marcelo Cabido Carlos Urcelay Instituto Multidisciplinario de BiologíaVegetal(COnICET-UnC) Velez Sarsfield 1611.Córdoba 5000Argentina Facultad de Ciencias Exactas Físicas y naturales Universidad Nacional de CórdobaVelez Sarsfield 299Córdoba 5000Argentina Facultad de Ciencias Agrarias Universidad Nacional de Catamarca.Maestro Quiroga 51Catamarca 4700Argentina

Aims Increasing evidence worldwide indicates that high mountain regions are not immune to invasion by alien ***,we aimed to address whether three major woody invaders of low-mountain areas are constrained to lower altitudes due to climatic restrictions or just by low propagule *** hypothesize that the increasing climatic harshness towards higher altitudes restricts seedling establishment and survival of these woody invaders and thus their potential for altitudinal *** The study was carried out in the Sierras Grandes Mountains,Córdoba,central Argentina(32°50′S,64°90′W).We addressed the hypothesis with an experimental approach,dissociating the effect of the environmental gradient from that of propagule pressure,by discarding the influence of seed *** translocated seeds of Gleditsia triacanthos L.,Ligustrum lucidum *** Pyracantha angustifolia(Franch.)*** the altitudinal gradient(from 900 to 2700 m asl).Seven sites were selected along the altitudinal gradient,spaced every 200-400 *** plots(4×4 m)were selected within each altitudinal site and excluded from livestock;100 seeds of each species were sown within each plot(6300 seeds in total).Seedling emergence and survival was monitored during two growing seasons and soil temperature and moisture was recorded as *** field experiment was complemented with lab *** Findings Climate along this altitudinal gradient might be least restrictive at mid elevations,as a result of the intersection between opposite soil temperature and moisture *** seeds germinated along the whole altitudinal gradient and seedlings successfully established and over-wintered well above their current altitudinal distribution(up to 2200 m for Ligustrum and 2400 m for Gleditsia and Pyracantha).Additional lab assays confirmed field patterns and gave some insights into contrasting regeneration strategies between these invaders that might help to overcome stochastic e

关键词： altitudinal gradient exotic species Gleditsia triacanthos Ligustrum lucidum Pyracantha angustifolia seedling establishment

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The interplay of nurse and target plant traits influences magnitude and direction of facilitative interactions under different combinations of stress and disturbance intensities in Andean dry grassland

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Journal of Plant Ecology 2016年第3期9卷 296-310页

作者： Andrea Catorci Luca Malatesta Jose Luis Velasquez Federico Maria Tardella Horacio zeballos School of Biosciences and Veterinary Medicine University of Camerinovia Pontoni 5CamerinoMCItaly School of Advanced Studies PhD Course in Environmental Sciences and Public Health University of Camerinovia Lili 55CamerinoMCItaly Centro de Estudios y Promoción del Desarrollo(Desco) Málaga Grenet 678ArequipaPeru Instituto de Ciencias de la naturaleza Territorio Yenergia RenovablesPontificia Universidad Católica del Perù.Av.Universitaria 1801San Miguel 32LimaPerù

Aims Facilitation is a key process in vegetation dynamics,driving the response to natural and anthropogenic *** harsh-grazed systems,palatable plants mainly survive when nested under unpalatable tussocks and *** magnitude and direction of positive interactions are driven by resource availability,extent of herbivory and type of nurse *** hypothesized that different combinations of disturbance and environmental stress affect community composition in the dry Puna(southern Peruvian Andes)by modifying nurse types and plant interactions in magnitude and specific *** investigated whether different combinations of stress and disturbance influence species richness,type and frequency of occurrence of nurse and beneficiary species and magnitude and patterns of plant interactions;whether nurse species influence these interactions and target species change their interactions under different combinations of stress and disturbance and whether plant functional traits differ in the studied communities and influence the pattern of spatial *** We selected three plant communities subject to different precipitation and management regimes:in each we laid a number of transects proportional to its *** collected include species presence/absence,type of spatial interactions with nurse species and functional *** calculated species richness and rarefaction patterns,described the patterns of plant-plant spatial interactions and investigated the associations between nurse and other species in the three communities using indicator species analysis(ISA).We performed ISA and correlation analysis to investigate whether plant functional traits influenced facilitative *** Findings We found that different combinations of stress and disturbance shaped a complex set of responses,including changes in the nurse species *** composition influenced magnitude and direction of plant interactions under different stress

关键词： dry Puna facilitation functional traits nurse and beneficiary species species-specific interaction stress-gradient hypothesis

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resolutive results with Oral Corticosteroids for Patients with COVID-19 in Pulmonary Inflammatory Phase. Successful Outpatient Experience during the Collapse of Belem Do Para Health System—Brazil

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Health 2021年第8期13卷 830-838页

作者： roberto S. zeballos Luciana n. L. Cruz Vânia C. r. Brilhante Adriana V. Lima Carlliane L. L. P. Martins Karla n. A. Lima Michele C. G. L. Leão Belinete L. Cruz Alessandra B. Dysarz Paulo C. B. Lobato Erika S. Almeida rute A. P. Costa Klevison C. Araújo Augusto C. C. Almeida Leônidas B. D. Junior Kathia O. Harada rita H. V. S. Araújo Elaine X. Prestes Ivete M. S. Souza Avany M. P. Pereira Antônio B. M. A. rocha Iracema A. Estevão Fagnei I. C. Carvalho Paulo M. P. Melo Clinical Care Sao Paulo Brazil Instituto de Ciencias da Saude Faculdade de Medicina Universidade Federal do Para Belem Brazil Fundacao Publica Estadual Hospital de Clinicas Gaspar Vianna Belem Brazil Hospital da Policia Militar do Para Belem Brazil Imunoclinic Belem Brazil Universidade Estadual do Para Fundacao Santa Casa de Misericordia do Para Belem Brazil Clinica Barros Cirurgia Plastica Belem Brazil Secretaria de Estado de Saude Publica Castanhal Brazil Centro de Tratamento Oncologico Belem Brazil Sociedade Brasileira de Valorizaç ã o das Sociedades Medicas—SOBEMED S&#227 o Paulo Brazil Clinica de nutrologia Sao Luiz Brazil Hospital nipo Brasileiro de Olhos Belem Brazil Centro de Ciencias Biologicas e da Saude Universidade do Estado do Para Belem Brazil Hospital regional do Baixo Amazonas Santarem Brazil Clinica Vallinoto Secretaria de Saude de Barcarena Barcarena Brazil Estrategia Saude da Familia Secretaria Municipal de Saude de Ananindeua Centro Universitario do Estado do Para Belem Brazil A. M. P. Endocrinologia Belem Brazil Instituto Avertano rocha Belem Brazil Departamento de neurocirurgia Hospital Militar de Area De Sao Paulo Sao Paulo Brazil

In the face of new diseases, medicine needs to reinvent itself in order to contain and control epidemics, such as the one we have recently faced, COVID-19, a disease with a wide spectrum of clinical severity. A new moment has been established, since the application of well-known, effective and safe medications for other diseases, has shown high success rates in the treatment of COVID-19. Thereunto, studies with early intervention are needed, which can change the unfavorable outcome of patients. In this article, we report the successful experience using an oral strategy during the collapse of Belem (Para, Brazil) Health System. Two hundred and ten patients were diagnosed with respiratory failure due to COVID-19, with no option of hospital treatment due to lack of beds and resources. These patients were then started on therapeutic regimen consisting of 40 mg prednisolone, 40 mg enoxaparin and macrolides (500 mg clarithromycin, 500 mg axetylcefuroxime) associated and followed in outpatient facilities. Two hundred and eight patients had an excellent therapeutic response and there were only two fatalities. These results push research boundaries, valuing outpatient treatment with early use of prednisolone in the initial pulmonary phase, preventing severe COVID-19 pneumonitis. Adoption of the proposed treatment intends to reduce the need for hospitalization, as well as lethality, with social robust benefits and incalculable economic savings since involves the use of accessible, safe and not expensive medications.

关键词： COVID-19 Corticosteroids Pulmonary Inflammatory Phase Collapse Brazil

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