Bivalve-Enhanced Nitrogen Removal From Coastal Estuaries

Interest in use of bivalves to remediate estuarine eutrophication has increased in recent years. High variation among data sets, substantial focus on particle removal, and insufficient links to anthropogenic nitrogen (N) sources encouraged this empirical examination of N removal by bivalves from estuaries receiving different N loads. We determined the capacity of the oyster Crassostrea virginica to remove N by comparing N assimilated into tissues with anthropogenic N from land or available in phytoplankton. Oyster growth yielded 0.2–0.4 g N in tissues and depended on estuary-specific conditions. d15N values confirmed that N in oyster tissues derived from local anthropogenic sources. At representative restoration and aquaculture conditions (≤400 oysters m–2 at 0.5%–1.0% of estuary area), estimated N removal was ≤15% of land derived loads and \u3c1% of phytoplankton N. N removal via biogeochemical processes was negligible during grow-out, but became important after oysters attained harvestable size. This study explicitly demonstrates that oysters assimilated land derived N, but suggests that bivalve bioremediation consider trade-offs between intensity of planting, ecological effects, and available space

Teacher Candidates’ Conceptions and Practices of Computational Thinking for Equity

This study documents novice science and math teachers’ developing pedagogical approaches to integrating computational thinking (CT) and data into their courses to support educational equity and social justice. The 10 novice teacher candidates (TCs) studied were part of an urban teacher residency program that empowered them with an asset-based pedagogy we describe as “CT for Equity.” Drawing on coursework and interviews as data, we asked three questions: What are teachers’ conceptions of CT? What are their CT instructional practices? And how did their students respond to those practices? To explore conceptions of CT, we used Kafai et al.’s (2020) articulation of three frames of CT – cognitive, situated, and critical approaches – and found that the TCs’ conceptions do not narrowly fit into one of the three frames, but rather they mix and match components of the perspectives to support a range of student outcomes, from transferable skills to preparing youth to explore social justice issues. We also identified a small but powerful set of core practices that the teachers used to support learning outcomes, including integrating data on locally and socially relevant issues. We present group-level trends and three classroom stories, or profiles of practice, to illustrate the generative ways TCs blended priorities from the three frames in instruction. The diversity in the TCs’ conceptions and practices deepens understandings of asset-based pedagogies in CT by shining light on the rich and varied ways that math and science teachers meet the needs of their minoritized students

A case study of tri-morbidity

Purpose: The purpose of this paper is to highlight the vulnerability of individuals living with tri-morbidity and the complexity of care required to serve this patient group, moreover to consider how a life course approach may assist. Design/methodology/approach: This paper uses a case study of a death of a young male adult experiencing homelessness and tri-morbidity in the UK and comparison of the mortality data for homeless adults in the UK with the general population. A synopsis of the mental health and health inclusion guidance for vulnerable adults is used. Findings: This paper found the importance of considering a life course approach and the impact of negative life events on individuals living with tri-morbidity and also the role of specialist services to support the complex needs of vulnerable adults including the importance of multi-disciplinary working and holistic care. Research limitations/implications: The research implications of this study are to consider how individuals living with tri-morbidity fit in to evidence-based care. Practical implications: The practical implication is to consider that those living with tri-morbidity have extra-ordinary lives often with a high concentration of negative life events. Therefore, an extra-ordinary approach to care maybe needed to ensure health inequalities are reduced. Social implications: This paper is an important case highlighting health inequalities, specifically mortality, in the homeless population. Originality/value: This paper is an original piece of work, with real cases discussed but anonymised according to guidance on reporting death case reports

Enhancing geological skills through tactile learning with interactive multi-layered three-dimensional printed geological models of southern Ontario.

In the digital age we often forget about the immense value of tactile learning. In other words, learning by touching and moving (i.e., assembling and disassembling) physical objects. Here we introduce the newly developed three dimensional (3D) printed models created by the Oil, Gas, Salt Resource Library that provide an unprecedented regional 3D perspective of the subsurface geology of southern Ontario. These innovative models simplify data from thousands of borehole records that are part of a 3D digital model focusing on the Paleozoic bedrock in southern Ontario (Carter et al. 2021). The 4-layer multi-coloured 3D print models are highly simplified versions of the 52-layer digital models. Nevertheless, the physical model encapsulates numerous aspects of the basin stratigraphy, geometry, and topography. Piloting the use of 3D printed geological models in undergraduate university courses (future Geoscientists and Geologic Engineers) in the form of laboratory exercises has shown to successfully bridge learning gaps in regard to conceptualizing spatial features (i.e., lateral extent, vertical thickness, and aspect of geologic layers), temporal context (i.e., relative age and preserved or missing layers) and economic resource formations (i.e., salt, water, oil, gas). The 3D print models also help students connect field observations with geologic interpretations (i.e., surficial mapping, subsurface borehole data to 3D surfaces, geometric shapes) as well as relating subsurface geology to surface features (i.e., landforms like escarpments and location of resources). In this workshop we will demonstrate the use of 3D printed models needed to bridge vital gaps in knowledge between real digital data and everyday life, applicable to the Geosciences. And then ask for help reflecting upon the use and impact of 3D printed models in other disciplines. Please bring your own device (smartphone, laptop, tablet) so you can experiment with resources and explore potential avenues to improve teaching and learning

Salmon Shark (Lamna ditropis) scratching behaviour using floating anthropogenic debris

Observations of animal behaviour in the open ocean are relatively rare. However, while conducting surveys in the Northeast Pacific in the summers of 2019 and 2021, we encountered two Salmon Shark (Lamna ditropis) using floating anthropogenic debris to scratch their bodies. We captured the activity with aerial (drone) and underwater cameras. We document and describe this novel behaviour as high energy, high impact, repetitive, fast, and long lasting (e.g., every ~15 s for >20 minutes). We explore these observations in light of traditional ecological knowledge and scientific literature

Sustainable Agriculture for Alaska and the Circumpolar North: Part I. Development and Status of Northern Agriculture and Food Security

Alaska is food insecure, importing the vast majority of its agricultural products and commodities and maintaining a minimal year-round food supply. Much of the circumpolar North, with some notable exceptions, is also food insecure and similarly reliant on foods imported from outside regions. The stark differences in food policies, food security, and overall production that exist between individual countries and regions of the circumpolar North are likely due to variability in their physical and social environments, their varying agrarian histories (e.g., Old World vs. New World), and their different first-hand experiences with food insecurity, often during wartime. Alaska’s agricultural history is unique, having progressed through periods of exploration and expansion and having experienced both success and failure. Agriculture exists today in Alaska as an underdeveloped natural resource – based industry that has been shaped by historical events and developmental processes and continually influenced by a host of environmental and socioeconomic factors. Continued interaction between stakeholders, agencies, and others will help the industry to progress to the point of meeting increasing food demands and improving food security.L’Alaska est aux prises avec l’insécurité alimentaire en ce sens que l’État importe la grande majorité de ses produits et marchandises agricoles et qu’il maintient un approvisionnement alimentaire minime à l’année. Malgré quelques exceptions remarquables, une grande partie du Nord circumpolaire souffre d’insécurité alimentaire et dépend de produits alimen­taires importés d’autres régions. Les importantes différences qui existent en matière de politiques alimentaires, d’insécurité alimentaire et de production générale entre les pays et les régions du Nord circumpolaire sont vraisemblablement attribuables aux divers environnements physiques et sociaux, à leur histoire agraire variée (celle de l’Ancien Monde par opposition à celle du Nouveau Monde) et à leurs différentes expériences directes en matière d’insécurité alimentaire, plus particulièrement en temps de guerre. L’histoire agricole de l’Alaska est unique, ayant passé par des périodes d’exploration et d’expansion, et connu tant des réussites que des échecs. De nos jours, l’agriculture en Alaska est une industrie sous-développée de ressources naturelles qui a été façonnée par des événements historiques et des processus développementaux, continuellement influencée par une panoplie de facteurs environnementaux et socioéconomiques. Les efforts collectifs déployés par les parties prenantes, les organismes et d’autres parties aideront cette industrie à progresser au point de pouvoir répondre à la demande croissante de nourriture et d’améliorer la sécurité alimentaire

Communicating new knowledge on previously reported genetic variants

Genetic tests often identify variants whose significance cannot be determined at the time they are reported. In many situations, it is critical that clinicians be informed when new information emerges on these variants. It is already extremely challenging for laboratories to provide these updates. These challenges will grow rapidly as an increasing number of clinical genetic tests are ordered and as the amount of patient DNA assayed per test expands; the challenges will need to be addressed before whole-genome sequencing is used on a widespread basis. Information technology infrastructure can be useful in this context. We have deployed an infrastructure enabling clinicians to receive knowledge updates when a laboratory changes the classification of a variant. We have gathered statistics from this deployment regarding the frequency of both variant classification changes and the effects of these classification changes on patients. We report on the system's functionality as well as the statistics derived from its use. Genet Med 2012:14(8):713–71

Sustainable Agriculture for Alaska and the Circumpolar North: Part III. Meeting the Challenges of High-Latitude Farming

Agriculture is a severely underdeveloped industry in Alaska and throughout most of the Subarctic. Growers and entrepreneurs must overcome a diverse set of challenges to achieve greater sustainability in northern communities where resilience is threatened by food insecurity and challenges to northern agriculture have limited the industry. However, several field-based or social policy solutions to problems of high-latitude agriculture have been proposed or are being put into practice. Field-based solutions include the use of special infrastructure or farm management strategies to extend the short growing season, improve soil quality, integrate appropriate pest and irrigation management practices, and further develop the livestock sector. Social and policy solutions are resolutions or decisions reached by stakeholders and government, often through cooperative interaction and discussion. These solutions stem from meaningful discussion and decision making among community members, organizations, agencies, and legislators. Social and policy solutions for Alaska include addressing the high costs of land and the preservation of agricultural lands; improved markets and market strategies; more appropriate funding for research, education and infrastructure; and other integrative or cooperative efforts. Collectively, these solutions will work to improve the outlook for sustainable agriculture in Alaska.En Alaska et dans une grande partie des régions subarctiques, l’agriculture est une industrie extrêmement sous-développée. Les producteurs et les entrepreneurs doivent surmonter un ensemble de défis variés pour donner lieu à une plus grande durabilité dans les collectivités nordiques, là où la résilience est menacée par l’insécurité alimentaire et où les défis caractérisant l’agriculture nordique imposent des restrictions à l’industrie. Cependant, plusieurs solutions apportées sur le terrain ou par le biais de politiques sociales vis-à-vis des problèmes touchant l’agriculture en haute latitude ont été proposées ou sont en train d’être mises en pratique. Parmi les solutions apportées sur le terrain, notons le recours à une infrastructure particulière ou à des stratégies de gestion agricole visant à prolonger la courte saison de croissance, à améliorer la qualité du sol, à intégrer des méthodes de gestion de l’irrigation et des organismes nuisibles, et à mettre davantage l’accent sur le secteur de l’élevage du bétail. Les solutions en matière de politiques sociales prennent la forme de résolutions ou de décisions prises par les parties prenantes et le gouvernement, souvent en collaboration et à la lumière de discussions. Ces solutions découlent de discussions et de prises de décisions importantes entre les membres des collectivités, les organisations, les agences et les législateurs. Les solutions de politiques sociales de l’Alaska portent notamment sur le coût élevé de la terre et la conservation des terres agricoles, sur l’amélioration des marchés et des stratégies de commercialisation, sur la nécessité d’obtenir des sources de financement plus adéquates pour la recherche, l’éducation et l’infrastructure, ainsi que sur d’autres efforts d’intégration et de coopération. Ensemble, ces solutions permettront d’améliorer la conjoncture de l’agriculture durable en Alaska