87 research outputs found

    Are wolves welcome? Hunters\u27 attitudes towards wolves in Vermont, USA

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    Published by Cambridge University Press on behalf of Fauna & Flora International. The forests of the north-east USA were once home to the Wolf Canis lupus, a species that played an important role in the ecology of this region. However, wolves were eradicated from the region more than a century ago, altering the species composition of the landscape and driving cascading changes in this ecosystem. Outdoor recreation is a major component of the economy of this region, and outdoor recreationists, including the hunting community, have a strong influence over decision-making related to policies on natural resources. Given their powerful position, hunters are important stakeholders whose views need to be taken into account when designing policies related to wildlife, in particular in relation to a controversial species such as the Wolf. In this study, through expert interviews and an online survey, we gained a deeper understanding of the attitudes of hunters towards wolves, and how these attitudes could affect any future reintroduction programme or natural movement of wolves into the state. We found that the majority of hunters hold a suite of negative attitudes towards wolves, their role in the landscape and their potential impact on the region. However, for hunters who were able to recognize the ecological roles of wolves, these negative attitudes were mostly reversed

    A randomised double-blind placebo-controlled trial investigating the behavioural effects of vitamin, mineral and n-3 fatty acid supplementation in typically developing adolescent schoolchildren

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    This material is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © 2015 The Authors. Published by Cambridge University Press.Nutrient deficiencies have been implicated in anti-social behaviour in schoolchildren; hence, correcting them may improve sociability. We therefore tested the effects of vitamin, mineral and n-3 supplementation on behaviour in a 12-week double-blind randomised placebo-controlled trial in typically developing UK adolescents aged 13–16 years (n 196). Changes in erythrocyte n-3 and 6 fatty acids and some mineral and vitamin levels were measured and compared with behavioural changes, using Conners’ teacher ratings and school disciplinary records. At baseline, the children’s PUFA (n-3 and n-6), vitamin and mineral levels were low, but they improved significantly in the group treated with n-3, vitamins and minerals (P=0·0005). On the Conners disruptive behaviour scale, the group given the active supplements improved, whereas the placebo group worsened (F=5·555, d=0·35; P=0·02). The general level of disciplinary infringements was low, thus making it difficult to obtain improvements. However, throughout the school term school disciplinary infringements increased significantly (by 25 %; Bayes factor=115) in both the treated and untreated groups. However, when the subjects were split into high and low baseline infringements, the low subset increased their offences, whereas the high-misbehaviour subset appeared to improve after treatment. But it was not possible to determine whether this was merely a statistical artifact. Thus, when assessed using the validated and standardised Conners teacher tests (but less clearly when using school discipline records in a school where misbehaviour was infrequent), supplementary nutrition might have a protective effect against worsening behaviour.Peer reviewe

    Whole system approaches for managing land-use change to deliver multiple benefits from biodiversity in tropical forest landcapes

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    Presentamos en una sesión dedicada al proyecto ROBIN: Session No. 101: Whole system approaches for managing land-use change to deliver multiple benefits from biodiversity in tropical forest landcapes (Chairs: Terry Parr, Michael Schmidt, Kirsten Thonicke - Theme 3

    Self organising maps for visualising and modelling

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    The paper describes the motivation of SOMs (Self Organising Maps) and how they are generally more accessible due to the wider available modern, more powerful, cost-effective computers. Their advantages compared to Principal Components Analysis and Partial Least Squares are discussed. These allow application to non-linear data, are not so dependent on least squares solutions, normality of errors and less influenced by outliers. In addition there are a wide variety of intuitive methods for visualisation that allow full use of the map space. Modern problems in analytical chemistry include applications to cultural heritage studies, environmental, metabolomic and biological problems result in complex datasets. Methods for visualising maps are described including best matching units, hit histograms, unified distance matrices and component planes. Supervised SOMs for classification including multifactor data and variable selection are discussed as is their use in Quality Control. The paper is illustrated using four case studies, namely the Near Infrared of food, the thermal analysis of polymers, metabolomic analysis of saliva using NMR, and on-line HPLC for pharmaceutical process monitoring

    Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis

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    BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS: We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION: Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING: UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London

    A Multi-cell, Multi-scale Model of Vertebrate Segmentation and Somite Formation

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    Somitogenesis, the formation of the body's primary segmental structure common to all vertebrate development, requires coordination between biological mechanisms at several scales. Explaining how these mechanisms interact across scales and how events are coordinated in space and time is necessary for a complete understanding of somitogenesis and its evolutionary flexibility. So far, mechanisms of somitogenesis have been studied independently. To test the consistency, integrability and combined explanatory power of current prevailing hypotheses, we built an integrated clock-and-wavefront model including submodels of the intracellular segmentation clock, intercellular segmentation-clock coupling via Delta/Notch signaling, an FGF8 determination front, delayed differentiation, clock-wavefront readout, and differential-cell-cell-adhesion-driven cell sorting. We identify inconsistencies between existing submodels and gaps in the current understanding of somitogenesis mechanisms, and propose novel submodels and extensions of existing submodels where necessary. For reasonable initial conditions, 2D simulations of our model robustly generate spatially and temporally regular somites, realistic dynamic morphologies and spontaneous emergence of anterior-traveling stripes of Lfng. We show that these traveling stripes are pseudo-waves rather than true propagating waves. Our model is flexible enough to generate interspecies-like variation in somite size in response to changes in the PSM growth rate and segmentation-clock period, and in the number and width of Lfng stripes in response to changes in the PSM growth rate, segmentation-clock period and PSM length

    Surgical site infection after gastrointestinal surgery in high-income, middle-income, and low-income countries: a prospective, international, multicentre cohort study

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    Background: Surgical site infection (SSI) is one of the most common infections associated with health care, but its importance as a global health priority is not fully understood. We quantified the burden of SSI after gastrointestinal surgery in countries in all parts of the world. Methods: This international, prospective, multicentre cohort study included consecutive patients undergoing elective or emergency gastrointestinal resection within 2-week time periods at any health-care facility in any country. Countries with participating centres were stratified into high-income, middle-income, and low-income groups according to the UN's Human Development Index (HDI). Data variables from the GlobalSurg 1 study and other studies that have been found to affect the likelihood of SSI were entered into risk adjustment models. The primary outcome measure was the 30-day SSI incidence (defined by US Centers for Disease Control and Prevention criteria for superficial and deep incisional SSI). Relationships with explanatory variables were examined using Bayesian multilevel logistic regression models. This trial is registered with ClinicalTrials.gov, number NCT02662231. Findings: Between Jan 4, 2016, and July 31, 2016, 13 265 records were submitted for analysis. 12 539 patients from 343 hospitals in 66 countries were included. 7339 (58·5%) patient were from high-HDI countries (193 hospitals in 30 countries), 3918 (31·2%) patients were from middle-HDI countries (82 hospitals in 18 countries), and 1282 (10·2%) patients were from low-HDI countries (68 hospitals in 18 countries). In total, 1538 (12·3%) patients had SSI within 30 days of surgery. The incidence of SSI varied between countries with high (691 [9·4%] of 7339 patients), middle (549 [14·0%] of 3918 patients), and low (298 [23·2%] of 1282) HDI (p < 0·001). The highest SSI incidence in each HDI group was after dirty surgery (102 [17·8%] of 574 patients in high-HDI countries; 74 [31·4%] of 236 patients in middle-HDI countries; 72 [39·8%] of 181 patients in low-HDI countries). Following risk factor adjustment, patients in low-HDI countries were at greatest risk of SSI (adjusted odds ratio 1·60, 95% credible interval 1·05–2·37; p=0·030). 132 (21·6%) of 610 patients with an SSI and a microbiology culture result had an infection that was resistant to the prophylactic antibiotic used. Resistant infections were detected in 49 (16·6%) of 295 patients in high-HDI countries, in 37 (19·8%) of 187 patients in middle-HDI countries, and in 46 (35·9%) of 128 patients in low-HDI countries (p < 0·001). Interpretation: Countries with a low HDI carry a disproportionately greater burden of SSI than countries with a middle or high HDI and might have higher rates of antibiotic resistance. In view of WHO recommendations on SSI prevention that highlight the absence of high-quality interventional research, urgent, pragmatic, randomised trials based in LMICs are needed to assess measures aiming to reduce this preventable complication

    Analysing the effects of payments for ecosystem services on human wellbeing and the environment

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    Die intensive Nutzung der natürlichen Ressourcen bedroht das fragile Gleichgewicht der verschiedenen Ökosysteme auf globaler Ebene. Als Reaktion auf die daraus resultierende Umweltkrise entstand in der zweiten Hälfte des 20. Jahrhunderts das Konzept der Ökosystemleistungen (Ecosystem Services - ES), um die menschliche Abhängigkeit von der Natur zu betonen. Das ES-Konzept wurde erweitert und die Instrumente, die als Zahlungen auf Ökosystemleistungen (Payment for Ecosystem Services - PES) bekannt sind, wurden entwickelt, um Landnutzer zu ermutigen, das Management auf die Bereitstellung von ES auszurichten. Allerdings wird die Wirksamkeit von PES, den menschlichen Druck auf die Umwelt zu reduzieren, stark kritisiert. Basierend auf dieser Kritik will diese Arbeit unser Verständnis für die Wirksamkeit von PES als Instrumente zur Bewältigung von Umweltveränderungen, zur Verbesserung des Wohlbefindens und zur Verringerung des menschlichen Drucks auf die Umwelt verbessern. Beginnend mit einer Literaturrecherche der implementierten PES-Systeme wurden Muster anhand eines Satzes von Kriterien für bestimmte Ergebnisse der Systeme bestimmt. Eine tiefere Analyse dieser Erkenntnisse führte einerseits zur Entwicklung eines neuen Konzeptmodells für das Design und die Umsetzung von PES-Systemen und andererseits zur eingehenden Untersuchung des Einflusses von PES im Rahmen von Entwicklungs- und Armutsbekämpfungsprojekten. Um vor Ort die gewonnenen Erkenntnisse zu beobachten, wurde ein partizipativer Prozess auf einen Studienfall in Mexiko angewandt, in dem Entscheidungen über das Landnutzungsmanagement getroffen wurden. Die gefärderten Diskussionen umfassten die Umsetzung eines PES-Programms, was dazu beigetragen hat, besser zu verstehen, welche Merkmale im Zusammenhang mit der Beteiligung der Stakeholder die Gestaltung und Umsetzung von PES-Programmen beeinflussen. Als Ergebnis liefert diese kumulative Dissertation eine Reihe von Merkmalen, die helfen zu verstehen, was PES wirksam macht, den Druck auf die Umwelt zu reduzieren und gleichzeitig das menschliche Wohlbefinden zu verbessern.Nelson Grima LiriaDr. rer. nat.Alpen-Adria-Universität Klagenfurt, Dissertation, 2017OeBB(VLID)439215

    Farmer Cooperation as a Means for Creating Local Food Systems—Potentials and Challenges

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    Facing the continuous loss of family-run farms across Europe, farmers are seeking new pathways to sustainability. One such pathway is involvement in local food supply systems. Often, this requires new forms of cooperation among farmers and with consumers. Little is known, however, about how this cooperation works in practice and how it might be better fostered. This paper aims to illustrate various forms of cooperation in relation to small-scale farming and the establishment of local food supply. It sheds light on challenges farmers are facing and on the potential measures they can adopt to tackle these challenges. By means of an Austrian case study, researchers applied a participatory method (Social Multi-Criteria Evaluation) and conducted workshops with farmers. Research shows that local production, processing and distribution infrastructure becomes more affordable when farmers collaborate with each other and with consumers and institutions. Furthermore, sharing and collectively developing know-how helps to optimise local farming and food supply systems. However, farmers often lack the knowledge and time to establish new collaborations and to re-organise labour, logistics and communication processes. They would benefit from the availability of cooperative schemes that help facilitate such processes and innovations
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