Responsabilidad social empresarial en el transporte público urbano de la Ciudad de Machala - Ecuador

  El presente trabajo de investigación tiene el fin de determinar el grado de cumplimiento de la responsabilidad social empresarial en las empresas de transporte público urbano de la ciudad de Machala, el cual está enfocado en tres aspectos primordiales: relación con trabajadores, el cuidado del medio ambiente, y servicio a usuarios. Se aplicó un tipo de investigación descriptivo seccional mediante aplicación de 102 encuestas aleatorias a los socios activos de las cooperativas existentes en la ciudad de Machala que brindan el servicio de movilidad dentro del cantón. Los resultados obtenidos indican que la aplicación de los principios de Responsabilidad Social en este importante sector económico aun es deficiente.   Palabras clave: responsabilidad social empresarial – Cooperativismo – Grupos de interés, transporte público, transporte urbano   ABSTRACT The present research work has the purpose of determining the degree of compliance of Corporate Social Responsibility in the urban public transport companies of the City of Machala, which is focused on three fundamental aspects: relationship with workers, care of the environment , and service to users. A type of descriptive sectional research was applied by applying 102 random surveys to the active members of the existing cooperatives in the city of Machala that provide the mobility service within the canton. The results obtained indicate that the application of the principles of Social Responsibility in this important economic sector is still deficient.   Key words: corporate Social Responsibility - Cooperativism – Stakeholders, public transport, urban transpor

Guía de práctica clínica para el diagnóstico y tratamiento de hemofilia en el Seguro Social de Salud del Perú (EsSalud)

Introduction. Hemophilia is a rare congenital bleeding disorder; which requires interdisciplinary, complex, and often expensive management. The objective of this clinical practice guideline (CPG) is to provide evidence-based clinical recommendations for the evaluation and management of patients with hemophilia in the Peruvian Social Security (EsSalud). Methods. A local elaboration group (GEG-Local) was established, conformed by specialists in hematology and methodologists. The GEG-Local formulated 8 clinical questions to be answered by this CPG. We searched for and selected hemophilia CPGs that answered the questions posed and obtained a score higher than 60% in domains 1 and 3 of the Appraisal of Guidelines for Research and Evaluation II (AGREE-II). During 2016, bibliographic searches were conducted in Pubmed, EMBASE and the Cochrane library, to update 7 clinical questions of the preselected CPG, and to answer a question de novo. In regular work meetings, the GEG-Local reviewed the evidence and formulated the recommendations and flowcharts using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) methodology. Finally, the CPG was approved with Resolution No. 32-IETSI-ESSALUD-2016. Results. This CPG addressed 8 clinical questions. Based on these questions, 22 recommendations were formulated (three strong recommendations and 19 weak recommendations) and four flowcharts. Conclusion. This article is the summary of the EsSalud CPG, in which the available scientific evidence on the diagnosis and treatment of hemophilia was assessed.Introducción. La hemofilia es un trastorno hemorrágico congénito poco común que requiere un manejo interdisciplinario, complejo, y frecuentemente costoso. El objetivo de la presente guía de práctica clínica (GPC) es proveer recomendaciones clínicas basadas en evidencia para el diagnóstico y tratamiento de hemofilia en el seguro social del Perú (EsSalud). Métodos. Se conformó un grupo elaborador local (GEG-Local) conformado por especialistas en hematología y metodólogos. El GEG-Local formuló ocho preguntas clínicas a ser respondidas por la presente GPC. Se buscaron y seleccionaron GPC de hemofilia que respondieran a las preguntas planteadas y obtuvieran un puntaje mayor a 60% en los dominios uno y tres del instrumento Appraisal of Guidelines for Research and Evaluation II (AGREE-II). Durante el 2016 se realizaron búsquedas bibliográficas en Pubmed, EMBASE y biblioteca Cochrane, para actualizar siete preguntas clínicas de la GPC preseleccionada, y para responder una pregunta de novo. En reuniones de trabajo periódicas, el GEGLocal revisó la evidencia y formuló las recomendaciones y flujogramas usando la metodología Grading of Recommendations Assessment, Development, and Evaluation (GRADE). Finalmente, la GPC fue aprobada con Resolución N° 32-IETSI-ESSALUD-2016. Resultados. La presente GPC abordó ocho preguntas clínicas. En base a dichas preguntas se formularon 22 recomendaciones (tres recomendaciones fuertes y 19 recomendaciones condicionales) y cuatro flujogramas. Conclusión. Este artículo es el resumen de la GPC de EsSalud, en la cual se valoró la evidencia científica disponible sobre diagnóstico y tratamiento de hemofilia

Evenness mediates the global relationship between forest productivity and richness

1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity–ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions

Native diversity buffers against severity of non-native tree invasions

Determining the drivers of non-native plant invasions is critical for managing native ecosystems and limiting the spread of invasive species$^{1,2}$. Tree invasions in particular have been relatively overlooked, even though they have the potential to transform ecosystems and economies$^{3,4}$. Here, leveraging global tree databases$^{5,6,7}$, we explore how the phylogenetic and functional diversity of native tree communities, human pressure and the environment influence the establishment of non-native tree species and the subsequent invasion severity. We find that anthropogenic factors are key to predicting whether a location is invaded, but that invasion severity is underpinned by native diversity, with higher diversity predicting lower invasion severity. Temperature and precipitation emerge as strong predictors of invasion strategy, with non-native species invading successfully when they are similar to the native community in cold or dry extremes. Yet, despite the influence of these ecological forces in determining invasion strategy, we find evidence that these patterns can be obscured by human activity, with lower ecological signal in areas with higher proximity to shipping ports. Our global perspective of non-native tree invasion highlights that human drivers influence non-native tree presence, and that native phylogenetic and functional diversity have a critical role in the establishment and spread of subsequent invasions

The global biogeography of tree leaf form and habit

Understanding what controls global leaf type variation in trees is crucial for comprehending their role in terrestrial ecosystems, including carbon, water and nutrient dynamics. Yet our understanding of the factors influencing forest leaf types remains incomplete, leaving us uncertain about the global proportions of needle-leaved, broadleaved, evergreen and deciduous trees. To address these gaps, we conducted a global, ground-sourced assessment of forest leaf-type variation by integrating forest inventory data with comprehensive leaf form (broadleaf vs needle-leaf) and habit (evergreen vs deciduous) records. We found that global variation in leaf habit is primarily driven by isothermality and soil characteristics, while leaf form is predominantly driven by temperature. Given these relationships, we estimate that 38% of global tree individuals are needle-leaved evergreen, 29% are broadleaved evergreen, 27% are broadleaved deciduous and 5% are needle-leaved deciduous. The aboveground biomass distribution among these tree types is approximately 21% (126.4 Gt), 54% (335.7 Gt), 22% (136.2 Gt) and 3% (18.7 Gt), respectively. We further project that, depending on future emissions pathways, 17-34% of forested areas will experience climate conditions by the end of the century that currently support a different forest type, highlighting the intensification of climatic stress on existing forests. By quantifying the distribution of tree leaf types and their corresponding biomass, and identifying regions where climate change will exert greatest pressure on current leaf types, our results can help improve predictions of future terrestrial ecosystem functioning and carbon cycling

The global biogeography of tree leaf form and habit.

Understanding what controls global leaf type variation in trees is crucial for comprehending their role in terrestrial ecosystems, including carbon, water and nutrient dynamics. Yet our understanding of the factors influencing forest leaf types remains incomplete, leaving us uncertain about the global proportions of needle-leaved, broadleaved, evergreen and deciduous trees. To address these gaps, we conducted a global, ground-sourced assessment of forest leaf-type variation by integrating forest inventory data with comprehensive leaf form (broadleaf vs needle-leaf) and habit (evergreen vs deciduous) records. We found that global variation in leaf habit is primarily driven by isothermality and soil characteristics, while leaf form is predominantly driven by temperature. Given these relationships, we estimate that 38% of global tree individuals are needle-leaved evergreen, 29% are broadleaved evergreen, 27% are broadleaved deciduous and 5% are needle-leaved deciduous. The aboveground biomass distribution among these tree types is approximately 21% (126.4 Gt), 54% (335.7 Gt), 22% (136.2 Gt) and 3% (18.7 Gt), respectively. We further project that, depending on future emissions pathways, 17-34% of forested areas will experience climate conditions by the end of the century that currently support a different forest type, highlighting the intensification of climatic stress on existing forests. By quantifying the distribution of tree leaf types and their corresponding biomass, and identifying regions where climate change will exert greatest pressure on current leaf types, our results can help improve predictions of future terrestrial ecosystem functioning and carbon cycling

Native diversity buffers against severity of non-native tree invasions.

Determining the drivers of non-native plant invasions is critical for managing native ecosystems and limiting the spread of invasive species1,2. Tree invasions in particular have been relatively overlooked, even though they have the potential to transform ecosystems and economies3,4. Here, leveraging global tree databases5-7, we explore how the phylogenetic and functional diversity of native tree communities, human pressure and the environment influence the establishment of non-native tree species and the subsequent invasion severity. We find that anthropogenic factors are key to predicting whether a location is invaded, but that invasion severity is underpinned by native diversity, with higher diversity predicting lower invasion severity. Temperature and precipitation emerge as strong predictors of invasion strategy, with non-native species invading successfully when they are similar to the native community in cold or dry extremes. Yet, despite the influence of these ecological forces in determining invasion strategy, we find evidence that these patterns can be obscured by human activity, with lower ecological signal in areas with higher proximity to shipping ports. Our global perspective of non-native tree invasion highlights that human drivers influence non-native tree presence, and that native phylogenetic and functional diversity have a critical role in the establishment and spread of subsequent invasions

Native diversity buffers against severity of non-native tree invasions

Determining the drivers of non-native plant invasions is critical for managing native ecosystems and limiting the spread of invasive species1,2. Tree invasions in particular have been relatively overlooked, even though they have the potential to transform ecosystems and economies3,4. Here, leveraging global tree databases5-7, we explore how the phylogenetic and functional diversity of native tree communities, human pressure and the environment influence the establishment of non-native tree species and the subsequent invasion severity. We find that anthropogenic factors are key to predicting whether a location is invaded, but that invasion severity is underpinned by native diversity, with higher diversity predicting lower invasion severity. Temperature and precipitation emerge as strong predictors of invasion strategy, with non-native species invading successfully when they are similar to the native community in cold or dry extremes. Yet, despite the influence of these ecological forces in determining invasion strategy, we find evidence that these patterns can be obscured by human activity, with lower ecological signal in areas with higher proximity to shipping ports. Our global perspective of non-native tree invasion highlights that human drivers influence non-native tree presence, and that native phylogenetic and functional diversity have a critical role in the establishment and spread of subsequent invasions

Evenness mediates the global relationship between forest productivity and richness

1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity–ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions