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Sökning: WFRF:(Beeckman Hans)

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1.
  • Kattge, Jens, et al. (författare)
  • TRY plant trait database - enhanced coverage and open access
  • 2020
  • Ingår i: Global Change Biology. - : Wiley-Blackwell. - 1354-1013 .- 1365-2486. ; 26:1, s. 119-188
  • Tidskriftsartikel (refereegranskat)abstract
    • Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits-almost complete coverage for 'plant growth form'. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait-environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.
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2.
  • Cooper, Declan L.M., et al. (författare)
  • Consistent patterns of common species across tropical tree communities
  • 2024
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 625:7996, s. 728-734
  • Tidskriftsartikel (refereegranskat)abstract
    • Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations 1–6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth’s 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories 7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world’s most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.
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3.
  • Cuni-Sanchez, Aida, et al. (författare)
  • High aboveground carbon stock of African tropical montane forests
  • 2021
  • Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 596:7873, s. 536-542
  • Tidskriftsartikel (refereegranskat)abstract
    • Tropical forests store 40–50 per cent of terrestrial vegetation carbon. However, spatial variations in aboveground live tree biomass carbon (AGC) stocks remain poorly understood, in particular in tropical montane forests. Owing to climatic and soil changes with increasing elevation, AGC stocks are lower in tropical montane forests compared with lowland forests. Here we assemble and analyse a dataset of structurally intact old-growth forests (AfriMont) spanning 44 montane sites in 12 African countries. We find that montane sites in the AfriMont plot network have a mean AGC stock of 149.4 megagrams of carbon per hectare (95% confidence interval 137.1–164.2), which is comparable to lowland forests in the African Tropical Rainforest Observation Network4 and about 70 per cent and 32 per cent higher than averages from plot networks in montane and lowland forests in the Neotropics, respectively. Notably, our results are two-thirds higher than the Intergovernmental Panel on Climate Change default values for these forests in Africa8. We find that the low stem density and high abundance of large trees of African lowland forests is mirrored in the montane forests sampled. This carbon store is endangered: we estimate that 0.8 million hectares of old-growth African montane forest have been lost since 2000. We provide country-specific montane forest AGC stock estimates modelled from our plot network to help to guide forest conservation and reforestation interventions. Our findings highlight the need for conserving these biodiverse and carbon-rich ecosystems.
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4.
  • Jucker, Tommaso, et al. (författare)
  • Tallo: A global tree allometry and crown architecture database
  • 2022
  • Ingår i: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 28:17, s. 5254-5268
  • Tidskriftsartikel (refereegranskat)abstract
    • Data capturing multiple axes of tree size and shape, such as a tree's stem diameter, height and crown size, underpin a wide range of ecological research—from developing and testing theory on forest structure and dynamics, to estimating forest carbon stocks and their uncertainties, and integrating remote sensing imagery into forest monitoring programmes. However, these data can be surprisingly hard to come by, particularly for certain regions of the world and for specific taxonomic groups, posing a real barrier to progress in these fields.To overcome this challenge, we developed the Tallo database, a collection of 498,838 georeferenced and taxonomically standardized records of individual trees for which stem diameter, height and/or crown radius have been measured. These data were collected at 61,856 globally distributed sites, spanning all major forested and non-forested biomes. The majority of trees in the database are identified to species (88%), and collectively Tallo includes data for 5163 species distributed across 1453 genera and 187 plant families. The database is publicly archived under a CC-BY 4.0 licence and can be access from: https://doi.org/10.5281/zenodo.6637599.To demonstrate its value, here we present three case studies that highlight how the Tallo database can be used to address a range of theoretical and applied questions in ecology—from testing the predictions of metabolic scaling theory, to exploring the limits of tree allometric plasticity along environmental gradients and modelling global variation in maximum attainable tree height. In doing so, we provide a key resource for field ecologists, remote sensing researchers and the modelling community working together to better understand the role that trees play in regulating the terrestrial carbon cycle.
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5.
  • Petosic, Antonija, et al. (författare)
  • Multifaceted intervention including Facebook-groups to improve guideline-adherence in ICU : a quasi-experimental interrupted time series study
  • 2021
  • Ingår i: Acta Anaesthesiologica Scandinavica. - : John Wiley & Sons. - 0001-5172 .- 1399-6576. ; 65:10, s. 1466-1474
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The impact of social media, with its speed, reach and accessibility, in interventions aimed to improve adherence to guidelines such as assessment of Pain, Agitation/Sedation and Delirium (PAD) in intensive care is not described. Therefore, the primary objective of this quality improvement study was to evaluate the impact of a multifaceted intervention including audit and feedback of quality indicators (QI) via Facebook-groups, educational events, and engagement of opinion leaders on adherence to PAD-guidelines in four ICUs.METHODS: A quasi-experimental interrupted time series study with eight monthly data points in the two phases Before and Intervention was designed. Proportion of nursing shifts with documented PAD-assessment (PAD-QIs) were retrieved from the electronical medical chart from included adult ICU patient-stays in four participating ICUs. Difference between the two time-periods was assessed using generalized mixed model for repeated measures with unstructured covariance matrix, and presented as Beta (B) with 95% confidence interval (CI).RESULTS: Finally, 1049 ICU patient-stays were analysed; 534 in Before and 515 in Intervention. All three PAD-QIs significantly increased in Intervention by 31% (B=30.7, 95%CI [25.7 to 35.8]), 26% (B=25.8, 95%CI [19.4 to 32.2]), and 34% (B=33.9, 95%CI [28.4 to 39.4]) in pain, agitation/sedation and delirium, respectively.CONCLUSION: A multifaceted intervention including use of Facebook-groups was associated with improved guideline-adherence in four ICUs, as measured with process PAD-QIs of PAD assessment. Further research on use of social media to improve guideline adherence is warranted, particularly as social distancing impacts clinical education and training and new approaches are needed.
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6.
  • Petosic, Antonija, et al. (författare)
  • Use of Facebook in a quality improvement campaign to increase adherence to guidelines in intensive care : A qualitative study of nurses' and physicians' experiences
  • 2023
  • Ingår i: Intensive & Critical Care Nursing. - : Elsevier. - 0964-3397 .- 1532-4036. ; 78
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: This study aimed to explore intensive care unit nurses' and physicians' experiences with professional content provided through closed Facebook groups, as part of a quality improvement campaign to improve guideline adherence. RESEARCH METHODOLOGY: This study used an exploratory qualitative design. In June 2018, data were collected through focus groups of intensive care nurses and physicians who also were members of closed Facebook groups. Data were analysed using reflexive thematic analysis, and the study was reported according to the consolidated criteria for reporting qualitative research. SETTING: The study's setting was four intensive care units at Oslo University Hospital, Norway. Professional content on Facebook comprised audit and feedback on quality indicators on intensive care topics with related pictures, videos, and weblinks. FINDINGS: Two focus groups of 12 participants were included in this study. Two main themes were identified: 'One size does not fit all ' described that quality improvement and implementation are influenced by several factors related to current recommendations and personal preferences. Various strategies are required to serve different purposes and meet individual needs. 'Matter out of place' described conflicting experiences of being offered or exposed to professional content on Facebook.CONCLUSION: Although the audit and feedback on quality indicators presented on Facebook motivated improvements, professional content on Facebook was perceived as inappropriate. Hospital platforms with applicable features of social media, such as reach, availability, convenience, ease, and possibility for commenting, were suggested to secure professional communication about recommended practices in intensive care units.IMPLICATIONS FOR CLINICAL PRACTICE: Social media platforms may be useful for professional communication among ICU personnel, but appropriate hospital applications with available and applicable social media features are recommended and needed. The use of several platforms may still be needed to reach all.
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7.
  • Petosic, Antonija, et al. (författare)
  • Use of social media for communicating about critical care topics : A Norwegian cross-sectional survey
  • 2019
  • Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley-Blackwell Publishing Inc.. - 0001-5172 .- 1399-6576. ; 63:10, s. 1398-1405
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Social media (SoMe) might be an alternative platform for communicating critical care topics to implement evidence-based practice in the intensive care unit (ICU). This survey aims to describe ICU nurses' and physicians' use of SoMe in general, and their perception of using closed Facebook-groups for receiving content on critical care topics.METHODS: A cross-sectional, web-based, anonymous survey was distributed to ICU physicians and nurses in four ICUs in autumn 2017 via an email-campaign. Descriptive statistics with rates, percentages and median numeric rating scale (NRS) scores, interquartile ranges are presented.RESULTS: The response-rate was 64% (253/ 394) including 210 nurses and 43 physicians. Overall, 93% had a SoMe-profile, and 77% had a profile on more than one network site. Facebook was the most used social network site, with 87% having a profile. Totally, 68% were daily users, but more nurses used Facebook daily vs physicians (81% vs 60%, respectively, P = 0.006). Nurses were also more positive toward being members of closed Facebook-groups aimed to exchange content on critical care topics (median NRS 9 (6-10) vs 6 (3-9), respectively, P = 0.014).CONCLUSION: The majority of ICU nurses and physicians were active SoMe users, mainly for personal purposes, and Facebook was the most popular SoMe. Nurses used Facebook daily more frequent and were more positive toward content on critical care topics on Facebook than physicians. These findings might be relevant to customize future communication about critical care topics via SoMe.
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