Sebastian Roger results 26
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Contrasting diurnal and seasonal root water uptake patterns among different plant life forms in a neotropical dry forestNARA Subscribed
Key message The woody plant life forms in a tropical dry forest differ largely in their diurnal and seasonal patterns of root water uptake and the related atmospheric and edaphic drivers. Abstract As a consequence of global climate change, the frequency and intensity of drought events in tropical forest ecosystems is expected to increase. Woody species in tropical dry forests (TDFs) exhibit diverse strategies to withstand drou...
Pathways from research to sustainable development: Insights from ten research projects in sustainability and resilienceNARA Subscribed
Drawing on collective experience from ten collaborative research projects focused on the Global South, we identify three major challenges that impede the translation of research on sustainability and resilience into better-informed choices by individuals and policy-makers that in turn can support transformation to a sustainable future. The three challenges comprise: (i) converting knowledge produced during research projects in...
Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
Typology and characteristics of indigenous goats and production systems in different agro-ecological zones of TanzaniaNARA Subscribed
Tanzania has a goat population of about 24.8 million most of which belong to the Small East African breed distributed in almost all agro-ecological zones. The different goat populations and the production system in which they are raised are not well characterized depriving animal breeders useful information in designing and running improvement and conservation programs. Therefore, the study was conducted in all agro-ecological...
A general method for estimating seed dormancy and colonisation in annual plants from the observation of existing floraNARA Subscribed
In plant ecology, characterising colonisation and extinction in plant metapopulations is challenging due to the non‐detectable seed bank that allows plants to emerge after several years of absence. In this study, we used a Hidden Markov Model to characterise seed dormancy, colonisation and germination solely from the presence–absence of standing flora. Applying the model to data from a long‐term survey of 38 annual weeds acros...
Deep transcriptome profiling of clinical K lebsiella pneumoniae isolates reveals strain and sequence type‐specific adaptationNARA Subscribed
Summary Health‐care‐associated infections by multi‐drug‐resistant bacteria constitute one of the greatest challenges to modern medicine. Bacterial pathogens devise various mechanisms to withstand the activity of a wide range of antimicrobial compounds, among which the acquisition of carbapenemases is one of the most concerning. In K lebsiella pneumoniae , the dissemination of the K. pneumoniae carbapenemase is tightly connecte...
Scaling population responses to spatial environmental variability in advection‐dominated systemsNARA Subscribed
We model the spatial dynamics of an open population of organisms that disperse solely through advection in order to understand responses to multiscale environmental variability. We show that the distance over which a population responds to a localized perturbation, called the response length, can be characterized as an organisms average lifetime dispersal distance, unless there is strong density‐dependence in demographic or di...
This review discusses the interface between two of the most important types of interactions between species, interspecific competition and predation. Predation has been claimed to increase, decrease, or have little effect on, the strength, impact or importance of interspecific competition. There is confusion about both the meaning of these terms and the likelihood of, and conditions required for, each of these outcomes. In thi...