357 research outputs found
Genetic and genomic monitoring with minimally invasive sampling methods
Funding: Marie Slodowska Curie Fellowship, (Behaviour-Connect) funded by the EU Horizon2020 program (ELC).The decreasing cost and increasing scope and power of emerging genomic technologies are reshaping the field of molecular ecology. However, many modern genomic approaches (e.g., RAD-seq) require large amounts of high quality template DNA. This poses a problem for an active branch of conservation biology: genetic monitoring using minimally invasive sampling (MIS) methods. Without handling or even observing an animal, MIS methods (e.g. collection of hair, skin, faeces) can provide genetic information on individuals or populations. Such samples typically yield low quality and/or quantities of DNA, restricting the type of molecular methods that can be used. Despite this limitation, genetic monitoring using MIS is an effective tool for estimating population demographic parameters and monitoring genetic diversity in natural populations. Genetic monitoring is likely to become more important in the future as many natural populations are undergoing anthropogenically-driven declines, which are unlikely to abate without intensive adaptive management efforts that often include MIS approaches. Here we profile the expanding suite of genomic methods and platforms compatible with producing genotypes from MIS, considering factors such as development costs and error rates. We evaluate how powerful new approaches will enhance our ability to investigate questions typically answered using genetic monitoring, such as estimating abundance, genetic structure and relatedness. As the field is in a period of unusually rapid transition, we also highlight the importance of legacy datasets and recommend how to address the challenges of moving between traditional and next generation genetic monitoring platforms. Finally, we consider how genetic monitoring could move beyond genotypes in the future. For example, assessing microbiomes or epigenetic markers could provide a greater understanding of the relationship between individuals and their environment.Publisher PDFPeer reviewe
Multiâdimensional biodiversity hotspots and the future of taxonomic, ecological and phylogenetic diversity: A case study of North American rodents
AimWe investigate geographic patterns across taxonomic, ecological and phylogenetic diversity to test for spatial (in)congruency and identify aggregate diversity hotspots in relationship to present land use and future climate. Simulating extinctions of imperilled species, we demonstrate where losses across diversity dimensions and geography are predicted.LocationNorth America.Time periodPresent day, future.Major taxa studiedRodentia.MethodsUsing geographic range maps for rodent species, we quantified spatial patterns for 11 dimensions of diversity: taxonomic (species, range weighted), ecological (body size, diet and habitat), phylogenetic (mean, variance, and nearestâneighbour patristic distances, phylogenetic distance and genusâtoâspecies ratio) and phyloendemism. We tested for correlations across dimensions and used spatial residual analyses to illustrate regions of pronounced diversity. We aggregated diversity hotspots in relationship to predictions of landâuse and climate change and recalculated metrics following extinctions of IUCNâlisted imperilled species.ResultsTopographically complex western North America hosts high diversity across multiple dimensions: phyloendemism and ecological diversity exceed predictions based on taxonomic richness, and phylogenetic variance patterns indicate steep gradients in phylogenetic turnover. An aggregate diversity hotspot emerges in the west, whereas spatial incongruence exists across diversity dimensions at the continental scale. Notably, phylogenetic metrics are uncorrelated with ecological diversity. Diversity hotspots overlap with landâuse and climate change, and extinctions predicted by IUCN status are unevenly distributed across space, phylogeny or ecological groups.Main conclusionsComparison of taxonomic, ecological and phylogenetic diversity patterns for North American rodents clearly shows the multifaceted nature of biodiversity. Testing for geographic patterns and (in)congruency across dimensions of diversity facilitates investigation into underlying ecological and evolutionary processes. The geographic scope of this analysis suggests that several explicit regional challenges face North American rodent fauna in the future. Simultaneous consideration of multiâdimensional biodiversity allows us to assess what critical functions or evolutionary history we might lose with future extinctions and maximize the potential of our conservation efforts.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154236/1/geb13050.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154236/2/geb13050_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154236/3/geb13050-sup-0001-Supinfo1.pd
Protected areas and freshwater biodiversity: a novel systematic review distils eight lessons for effective conservation
Protected areas are a global cornerstone of biodiversity conservation and restoration. Yet freshwater biodiversity is continuing to decline rapidly. To date there has been no formal review of the effectiveness of protected areas for conserving or restoring biodiversity in rivers, lakes, and wetlands. We present the first assessment using a systematic review of the published scientific evidence of the effectiveness of freshwater protected areas. Systematic searches returned 2,586 separate publications, of which 44 provided quantitative evidence comprising 75 case studies. Of these, 38 reported positive, 25 neutral, and 12 negative outcomes for freshwater biodiversity conservation. Analysis revealed variable relationships between conservation effectiveness and factors such as taxa assessed, protected area size and characteristics, International Union for Conservation of Nature (IUCN) protected area category, and ecoregion. Lack of effectiveness was attributed to many anthropogenic factors, including fishing (often with a lack of law enforcement), water management (abstraction, dams, and flow regulation), habitat degradation, and invasive nonânative species. Drawing on the review and wider literature we distil eight lessons to enhance the effectiveness of protected areas for freshwater biodiversity conservation. We urge policymakers, protected area managers, and those who fund them to invest in wellâdesigned research and monitoring programs and publication of evidence of protected area effectiveness
Synthetic Biology and the United Nations
Synthetic biology is a rapidly emerging interdisciplinary field of science and engineering that aims to redesign living systems through reprogramming genetic information. The field has catalysed global debate among policymakers and publics. Here we describe how synthetic biology relates to these international deliberations, particularly the Convention on Biological Diversity (CBD)
Safety of dabigatran etexilate for the secondary prevention of venous thromboembolism in children
This open-label, single-arm, prospective cohort trial is the first phase 3 safety study to describe outcomes in children treated with dabigatran etexilate for secondary venous thromboembolism (VTE) prevention. Eligible children aged 12 to <18 years (age stratum 1), 2 to <12 years (stratum 2), and >3 months to <2 years (stratum 3) had an objectively confirmed diagnosis of VTE treated with standard of care (SOC) for âĄ3 months, or had completed dabigatran or SOC treatment in the DIVERSITY trial (NCT01895777) and had an unresolved clinical thrombosis risk factor requiring further anticoagulation. Children received dabigatran for up to 12 months, or less if the identified VTE clinical risk factor resolved. Primary end points included VTE recurrence, bleeding events, and mortality at 6 and 12 months. Overall, 203 children received dabigatran, with median exposure being 36.3 weeks (range, 0-57 weeks); 171 of 203 (84.2%) and 32 of 203 (15.8%) took capsules and pellets, respectively. Overall, 2 of 203 children (1.0%) experienced on-treatment VTE recurrence, and 3 of 203 (1.5%) experienced major bleeding events, with 2 (1.0%) reporting clinically relevant nonmajor bleeding events, and 37 (18.2%) minor bleeding events. There were no on-treatment deaths. On-treatment postthrombotic syndrome was reported for 2 of 162 children (1.2%) who had deep vein thrombosis or central-line thrombosis as their most recent VTE. Pharmacokinetic/pharmacodynamic relationships of dabigatran were similar to those in adult VTE patients. In summary, dabigatran showed a favorable safety profile for secondary VTE prevention in children aged from >3 months to <18 years with persistent VTE risk factor(s). This trial was registered at www.clinicaltrials.gov as #NCT02197416. (Blood. 2020;135(7):491-504
Levers and leverage points for pathways to sustainability
Humanity is on a deeply unsustainable trajectory. We are exceeding planetary boundaries and unlikely to meet many international sustainable development goals and global environmental targets. Until recently, there was no broadly accepted framework of interventions that could ignite the transformations needed to achieve these desired targets and goals. As a component of the IPBES Global Assessment, we conducted an iterative expert deliberation process with an extensive review of scenarios and pathways to sustainability, including the broader literature on indirect drivers, social change and sustainability transformation. We asked, what are the most important elements of pathways to sustainability? Applying a socialâecological systems lens, we identified eight priority points for intervention (leverage points) and five overarching strategic actions and priority interventions (levers), which appear to be key to societal transformation. The eight leverage points are: (1) Visions of a good life, (2) Total consumption and waste, (3) Latent values of responsibility, (4) Inequalities, (5) Justice and inclusion in conservation, (6) Externalities from trade and other telecouplings, (7) Responsible technology, innovation and investment, and (8) Education and knowledge generation and sharing. The five intertwined levers can be applied across the eight leverage points and more broadly. These include: (A) Incentives and capacity building, (B) Coordination across sectors and jurisdictions, (C) Pre-emptive action, (D) Adaptive decision-making and (E) Environmental law and implementation. The levers and leverage points are all non-substitutable, and each enables others, likely leading to synergistic benefits. Transformative change towards sustainable pathways requires more than a simple scaling-up of sustainability initiativesâit entails addressing these levers and leverage points to change the fabric of legal, political, economic and other social systems. These levers and leverage points build upon those approved within the Global Assessment's Summary for Policymakers, with the aim of enabling leaders in government, business, civil society and academia to spark transformative changes towards a more just and sustainable world. A free Plain Language Summary can be found within the Supporting Information of this article.Fil: Chan, Kai M. A.. University of British Columbia; CanadĂĄFil: Boyd, David R.. University of British Columbia; CanadĂĄFil: Gould, Rachelle. University of Vermont; Estados UnidosFil: Jetzkowitz, Jens. Staatliches Museum fur Naturkunde Stuttgart; AlemaniaFil: Liu, Jianguo. Michigan State University; Estados UnidosFil: Muraca, BĂĄrbara. University of Oregon; Estados UnidosFil: Naidoo, Robin. University of British Columbia; CanadĂĄFil: Beck, Paige. University of British Columbia; CanadĂĄFil: Satterfield, Terre. University of British Columbia; CanadĂĄFil: Selomane, Odirilwe. Stellenbosch University; SudĂĄfricaFil: Singh, Gerald G.. University of British Columbia; CanadĂĄFil: Sumaila, Rashid. University of British Columbia; CanadĂĄFil: Ngo, Hien T.. Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services; AlemaniaFil: Boedhihartono, Agni Klintuni. University of British Columbia; CanadĂĄFil: Agard, John. The University Of The West Indies; Trinidad y TobagoFil: de Aguiar, Ana Paula D.. Stockholms Universitet; SueciaFil: Armenteras, Dolors. Universidad Nacional de Colombia; ColombiaFil: Balint, Lenke. BirdLife International; Reino UnidoFil: Barrington-Leigh, Christopher. Mcgill University; CanadĂĄFil: Cheung, William W. L.. University of British Columbia; CanadĂĄFil: DĂaz, Sandra Myrna. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - CĂłrdoba. Instituto Multidisciplinario de BiologĂa Vegetal. Universidad Nacional de CĂłrdoba. Facultad de Ciencias Exactas FĂsicas y Naturales. Instituto Multidisciplinario de BiologĂa Vegetal; ArgentinaFil: Driscoll, John. University of British Columbia; CanadĂĄFil: Esler, Karen. Stellenbosch University; SudĂĄfricaFil: Eyster, Harold. University of British Columbia; CanadĂĄFil: Gregr, Edward J.. University of British Columbia; CanadĂĄFil: Hashimoto, Shizuka. The University Of Tokyo; JapĂłnFil: HernĂĄndez Pedraza, Gladys Cecilia. The World Economy Research Center; CubaFil: Hickler, Thomas. Goethe Universitat Frankfurt; AlemaniaFil: Kok, Marcel. PBL Netherlands Environmental Assessment Agency; PaĂses BajosFil: Lazarova, Tanya. PBL Netherlands Environmental Assessment Agency; PaĂses BajosFil: Mohamed, Assem A. A.. Central Laboratory for Agricultural Climate; EgiptoFil: Murray-Hudson, Mike. University Of Botswana; BotsuanaFil: O'Farrell, Patrick. University of Cape Town; SudĂĄfricaFil: Palomo, Ignacio. Basque Centre for Climate Change; EspañaFil: Saysel, Ali Kerem. BoÄaziçi University; TurquĂaFil: Seppelt, Ralf. Martin-universitĂ€t Halle-wittenberg; AlemaniaFil: Settele, Josef. German Centre for Integrative Biodiversity Research-iDiv; AlemaniaFil: Strassburg, Bernardo. International Institute for Sustainability, Estrada Dona Castorina; BrasilFil: Xue, Dayuan. Minzu University Of China; ChinaFil: BrondĂzio, Eduardo S.. Indiana University; Estados Unido
Alien Planktonic Species in the Marine Realm: What Do They Mean for Ecosystem Services Provision?
Human well-being is significantly affected by the contributions provided by ecosystems, or ecosystem services. In this well-illustrated atlas, world-class experts identify and discuss key driving forces, trade-offs, and synergies of ecosystem services. Through interdisciplinary case studies varying across ecosystems and scales, this atlas narrows the knowledge gap between ecosystem services management and related fields of study.
This atlas begins with conceptual background and proceeds to present drivers and their risks for ecosystems, their functions and services, and biodiversity. Trade-offs and synergies among ecosystem services and societal responses to the drivers and trade-offs are discussed. Sustainable land management and governance concepts are demonstrated throughout the atlas. Environmental scientists, practitioners and policy makers worldwide will appreciate the solutions and best practices identified throughout the chapters. Students of environmental sciences, socio-economics and landscape planning will find this atlas to be a valuable read, as well
The challenges of long-term invasive mammal management: lessons from the UK
We consider the motivations, strategies, and costs involved in invasive mammal management undertaken in the UK. Widespread established invasive mammals require longâterm management to limit damage or spread, but ongoing management is costly and complex. Longâterm management is most effective where it is applied at a landscape scale, but this requires overarching coâordination between multiple stakeholders. Five challenges for successful longâterm management of invasive mammal species are identified as follows: defining landscapeâscale strategies, management coâordination, stakeholder and community engagement, sustainable funding, and evidence requirements. We make recommendations on the supportive infrastructure needed for effective landscapeâscale management of invasive mammals to fulfil longâterm conservation aims, as follows. 1. There is a need for evidenceâbased Invasive Species Action Plans to provide strategy for the longâterm ongoing management of prioritised species at appropriate scales. 2. Where possible, multispecies approaches to invasive species management should be adopted. 3. Trusted leadership should be identified to take ownership of Action Plans and provide an overarching coâordination to bring individuals, organisations, and funders together. 4. Support for a centralised hub for training, data, and knowledge flows will greatly improve scientific outcomes through a searchable evidence base, and via best practice and knowledge sharing
From Marginalized to Maximized Opportunities for Diverse Youths With Disabilities: A Position Paper of the Division on Career Development and Transition
Current secondary education and transition practices have created differential education and employment outcomes by gender, race and ethnicity, socioeconomic status, and disability classifications. These differential outcomes result in economic and social marginalization of far too many students with disabilities. Transition education practices need to respond to these differential outcomes and provide targeted, systematic, and long-term opportunities for all students to attain individually and family-determined postschool goals. This position paper recommends an ecological framework for considering the multiple systems that influence transition education and postschool outcomes for diverse youths with disabilities. The authors argue for educators, researchers, and policy makers to attend to social, political, economic, educational, and cultural contexts in developing effective interventions and improving postschool outcomes.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline
- âŠ