The winners of the sixth annual D.C. Public Health Case Challenge were announced at this year’s National Academy of Medicine (NAM) Annual Meeting.

The winners of the seventh annual D.C. Public Health Case Challenge were announced at this year’s National Academy of Medicine (NAM) Annual Meeting. The challenge aims to promote interdisciplinary, problem-based learning around a public health issue of importance to the Washington, D.C., community.

The 1.3 million nursing home residents in the U.S. make up less than 0.5 percent of the nation’s population, but represent approximately 15 percent of COVID-19 related deaths to date.

A new study has investigated the effects of set-aside management —when fields are taken out of agricultural production — on common invertebrate decomposers in soil. The diversity of woodlice species was higher in set-aside fields compared to neighbouring wheat fields and this effect increased in older set-asides. This study highlights the importance of set-aside areas as habitats for soil invertebrates, which are important for soil health.

; Credit: /Dani Pendergast for NPR

Friday, March 13, was the last time Alexandra Sullivan saw her fellow yearbook staffers in person.

"We were trying to get as many pictures of people as possible 'cause we knew we wouldn't be able to take any more," Sullivan, 18, says.

Like most U.S. public school students, Sullivan is learning from home now. And much like her lessons, her work on the yearbook continues.

Sullivan is the yearbook profiles editor at Marjory Stoneman Douglas High School in Parkland, Fla. She's one of 10 seniors who were also on staff two years ago, when a gunman opened fire at their school. Back then, she and her classmates had to adapt to an unimaginable tragedy. Now, they have to adapt again – this time, to the pandemic.

"This book has to get done and we'll do whatever we have to do to finish it," she says, "which is exactly how we approached the '18 book."

Senior Caitlynn Tibbetts, the yearbook's co-editor-in-chief, was also on staff when the shooting happened. She says there's a collective grief among seniors over what their class — which has already lost so much — is losing now. They won't be able to dance together at prom, or walk across the stage at graduation.

"This class especially has gotten screwed over so much through the past four years," Tibbetts, 18, says. "The last two months were supposed to be the best, and they were supposed to make up for everything that we've been through. And it's really hard on us to kind of just watch it all disappear."

Amid all the uncertainty, she says, one thing is clear: The yearbook must get done, and it must get to students.

High school yearbooks are like time capsules. They record theater productions, which teams went to state finals, who was voted most likely to succeed.

And when a news event makes history – leaving a mark on students and society – it's the yearbook's job to document it. At Stoneman Douglas, that's meant changing plans just weeks before the yearbook is due.

Yearbook advisor Sarah Lerner says, "Having done one under unthinkable circumstances before, I hate to say that we're kind of, you know, used to it, but, for the seniors on staff, we are."

Two years ago, after the shooting, the yearbook staff pivoted to include remembrances of the victims. Tibbetts and Sullivan stepped up to help write them, and anything else that was needed at the last minute, while other yearbook staffers took time to attend funerals.

This year, they're making room for two new spreads about the pandemic.

"One of them is more of a factual-based one, how it's affected our community, including businesses," Tibbetts explains. "The other spread is focused on the effect it's had on us personally, both with online schooling and especially with seniors."

Logistically, putting the yearbook together and writing the new sections has been a challenge. Unlike 2018, they can't be in the same room with each other to finish the design.

"We have to social distance and our parents wouldn't let us go out," Tibbetts says.

They mainly rely on a group chat with everyone on the staff. "It can get hectic," Tibbetts says, "especially when it's all happening at like 12 a.m."

Lerner and her students missed the original deadline to finish the book, on April 6. But the printer, Walsworth, says the company is being flexible with Stoneman Douglas and other yearbook staffs across the country. Lerner says she's aiming to get the book in by the end of April.

Once the printed copies come back, more than 1,200 books will somehow have to be distributed to students. Lerner has some ideas for how to do that safely.

However, there's one important yearbook tradition they may not be able to save.

"We may not actually get to sign books this year," Lerner says. And that's been hard to accept.

"As a teacher, I really like to get my students to sign my book, you know, and I like to sign theirs and I like to see the kids carrying them around at school."

Lerner says she's sad that might not happen this year. But at least this time, the students of Marjory Stoneman Douglas High School aren't on their own.

"Unlike the 2018 books, this situation is not unique to us," she says. "So there's comfort in knowing that all staffs are going through the same issue. It's not just us."

This content is from Southern California Public Radio. View the original story at SCPR.org.

Saltmarsh restoration can contribute to a range of ecosystem services but, according to new research, the effectiveness depends on previous land use. To optimise restoration, more research is needed on the effects of previous land disturbance on the delivery of ecosystem services and the relationships between physical, biogeochemical and ecological processes.

Municipal solid waste (MSW) landfills, which consist of everyday consumer items, are potential long-term sources of emissions that could threaten the environment and human health if they are not managed carefully after closure. New research has presented a methodology to estimate future emission levels for closed MSW landfills and the impact of different aftercare strategies.

A new Spanish study has highlighted current developments in the tourism sector that have significant implications for water supply and demand, but are barely addressed in recent land use policies. The findings indicate that any tourist destination that is to follow the ???quality tourist??? model will have an increased water demand in domestic residential areas, which is one of the biggest threats to sustainable water management.

High quality landscape assessments of areas protected under the Natura 2000 network are critical for effective long-term management plans. In a recent study, scientists have presented a integrated assessment of a Natura 2000 site in Sicily, Italy, which not only considers preservation of environmental features, as required by Natura 2000, but also human features, such as places of historical interest or industrial activity.

Heat waves are predicted to become more frequent under climate change, and are likely to be particularly severe in cities and towns due to the Urban Heat Island effect (UHI). A recent UK study of UHI mitigation strategies has demonstrated that even a small urban river can result in a cooling effect of 1??C during temperatures higher than 20??C, and that these cooling effects can be improved by careful urban design of the surrounding areas.

Researchers in Berlin have demonstrated that urban wasteland areas can be used as suitable habitats for a range of grassland species. Using simple and cost-effective measures to sow grassland seed mixtures, they found that such areas flourished despite poor soil conditions and high levels of impact from people.

Biodiversity on organic farms is, on average, 34% higher than on conventional farms, according to a recent study. The researchers used data from a large number of studies to show that this figure has remained stable over the last 30 years.

How can we grow more crops without taking too much water away from freshwater ecosystems for irrigation? A new study indicates that it is possible to double crop production by 2050 without exceeding set limits for water extraction if more crops are grown in regions with higher rainfall and with corresponding shifts in international trade and agricultural management. However, without appropriate safeguards, and if we follow the current business-as-usual scenario, this could come at the ecological cost of converting natural land and forest into cropland. This research provides a ‘first-step’ in analysing potential trade-offs in the global food-trade-water nexus.

The amount of land and ocean that a country uses in order to produce food and other commodities, or its land or ocean ‘footprint’, increases by over a third for each doubling of income, new research shows. Thus, as nations become richer, and lifestyles become more affluent, pressure on natural resources increases.

A new global map of urban areas is available for use which shows that cities occupy less than 0.5 per cent of the world’s total land area.

A new Pan-European landscape map (LANMAP) has been developed that allows a common classification of landscapes across Europe.

High quality landscape assessments of areas protected under the Natura 2000 network are critical for effective long-term management plans. In a recent study, scientists have presented a integrated assessment of a Natura 2000 site in Sicily, Italy, which not only considers preservation of environmental features, as required by Natura 2000, but also human features, such as places of historical interest or industrial activity.

Under pressure from rising food prices, many nations have begun to acquire large tracts of agricultural land in foreign countries, a practice known as ‘land grabbing’. New research has now quantified current levels of land grabbing and demonstrated that it is accompanied by concerning levels of ‘water grabbing’ which could affect water supply in the ‘grabbed’ countries.

Researchers in Berlin have demonstrated that urban wasteland areas can be used as suitable habitats for a range of grassland species. Using simple and cost-effective measures to sow grassland seed mixtures, they found that such areas flourished despite poor soil conditions and high levels of impact from people.

The amount of land and ocean that a country uses in order to produce food and other commodities, or its land or ocean ‘footprint’, increases by over a third for each doubling of income, new research shows. Thus, as nations become richer, and lifestyles become more affluent, pressure on natural resources increases.

Wildfires in the Mediterranean region are a significant threat to human life and the natural environment and cause considerable economic damages. Recent research from Italy suggests that different types of land cover influence the timing of wildfires throughout the year and this knowledge can be used to improve fire risk assessment and prevention strategies.

The reduction in summer storms in the western Mediterranean could be partly caused by land use change on coasts and mountain slopes, a new study reports. This lack of storms causes water vapour to build up above the region and may lead to heavy rainfall and flooding in central Europe.

Estonian research has identified land use practices and agrochemical use as the main pressures that are causing a decline in pollinating insects in Europe, such as bees and butterflies. It calls for increased funds for agri-environment measures from the Common Agricultural Policy (CAP) to help tackle pollinator loss.

Indonesia’s plans to double palm oil production by 2020 have obvious financial benefits, but implications for food, biodiversity and carbon stocks are not so clear. A new model predicts the impacts of five possible palm oil production strategies and indicates the best approach is to target degraded and agricultural land that is most productive for palm oil.

Natural predators of agricultural pests are influenced by the type and range of habitats within a farming landscape. A new study has developed an approach which predicts the risk of pest infestation and natural predation according to landscape features, to help land managers structure landscapes that encourage natural pest control.

Converting grassland to arable land can reduce the diversity of nematodes, predatory mites, earthworms and enchytraeid worms in the soil, according to a study by Dutch researchers. However, they found that restoring arable land to grassland did not fully restore the diversity of these four groups during the course of the four-year study.

Large-scale cultivation of bioenergy crops on marginal land is unfeasible, according to a recent study. While limiting bioenergy crops to less productive land could cut the sector’s impact on food prices, the financial incentive to grow crops on more productive land may be too strong for landowners to ignore, the researchers suggest.

The widespread use of higher-yielding improved varieties of crops as part of the ‘Green Revolution’ has averted the conversion of between 18 to 27 million hectares of forests, woodlands and pastures in the period 1965 to 2004, according to a recent study. However, its authors caution that the relationship between these crops and land use change is complex, and good governance is needed to protect biodiversity from future expansion of agricultural land.

Restoration of upland bog habitats by blocking drainage channels has caused concern among some sheep farmers that this will reduce the quality of grazing areas. However, UK researchers have shown that drainage does not encourage growth of plants favoured by sheep, nor do sheep use drained areas more. Therefore they conclude such restoration measures are unlikely to detrimentally affect sheep grazing.

A new study suggests that abandoned farmland is widespread in Europe and that not all land that has been abandoned is unsuitable for farming. Understanding how abandoned farmland is distributed may be important for making land management decisions – for instance, recultivation versus reversion to forest.

Storage of carbon in soil helps to keep land fertile and regulates the climate, and is therefore an important ecosystem service. However, mapping of soil carbon stocks currently uses unreliable measures. This study used data from a national survey of English grasslands to show that soil carbon stocks can be accurately predicted using simple measures of soil and climatic conditions.

A global cropland percentage map and a global field size map have been created for the first time to guide scientists and policymakers interested in global agricultural modelling and assessment. Both maps are for the baseline year 2005 and combined multiple data sets from global, regional and national levels to achieve a high level of accuracy and 1 km2 resolution.

An extensive field investigation discovered that 38% of soils in southwest England show signs of enhanced surface water runoff due to soil degradation. The study also revealed which types of fields and soils are linked to the most or least degradation.

New research has reviewed the Irish implementation of the first phase of the EU Noise Directive. So far 31 different organisations have been involved and this will increase throughout the second phase of the Directive's implementation. More standardisation is needed to harmonise activities, perhaps by establishing a national expert steering group.

The costs and benefits of sustainable land management have been collated in a new review. Data from a global archive was analysed for the costs of sustainable practices and technologies and for land users’ perceptions of cost–benefit ratios. Most respondents had a positive view of the short-term cost-benefit ratio, and a strongly positive view of the long term. Low upfront costs, long-term planning and security of land tenure were identified as important factors to facilitate these practices.

Maintaining and restoring the world's drylands or arid zones could provide a win-win option for addressing climate change, according to new research. Drylands not only store large amounts of carbon, but improving how they are managed could reduce the vulnerability of ecosystems and humans.

The thinning of Iceland’s ice caps could be influencing volcanic activity, according to new research. The study developed a model to predict the changes in pressure on magma caused by thinning ice and applied it to the recent activity of two Icelandic volcanoes. The results suggest that the effects of thinning ice may increase volcanic activity in some cases, but reduce it in others.

Scientists have calculated carbon budgets for croplands in Europe, based on field measurements from nine sites across Europe. They found that significant soil carbon losses occurred from cropping even though some farmers used measures to enhance carbon-sequestration. These results may challenge findings from some other modelling studies if they turn out to be typical for all EU croplands.

Land cleared in the tropics loses nearly twice as much carbon and produces less than half the annual crop yield as land in temperate zones, according to researchers. Their analysis of the trade-off between crop production and the loss of carbon stored in vegetation highlights the need to target reforestation in the tropics.

A recent study has projected changes in the spread of malaria caused by climate change and climate variability in Africa by including the effect of variations in land use on local climate. It concludes that the risk of malaria epidemics is likely to shift from the north to the south of the Sahel, and to highland areas previously free of the disease.

Wildfires could release up to nine times more stored carbon from drained peatland at high latitudes than from untouched peatland in the same region, according to a recent study. As climate change is expected to both dry out peatland and increase the frequency of wildfires, the results have serious implications for the role of northern peatlands as carbon sinks or sources.

Climate change is likely to exacerbate the urban heat island (UHI) effect. A new study has therefore examined possible climate change adaptation measures that can alleviate the UHI effect and illustrated how these strategies can be practically applied. While the study provides real-life examples to demonstrate how the measures can be used, it does not include any quantitative assessment of their impacts.

Green spaces in cities can have a cooling influence which helps reduce the ‘urban heat island effect’. New research from Portugal has demonstrated that even a small community garden can provide a significant cooling impact that can help efforts to adapt to climate change.

Climate change is a particular threat to island nations and effective adaptation is vital. A new analysis examines current adaptation measures in tropical Oceania and identifies guidelines for implementing resilient, ecosystem-based adaptation (EbA). Among its recommendations, local communities should be fully involved in planning adaptation measures.

Coastal wetlands can substantially reduce erosion, property damage and human deaths in the face of rising sea levels and severe storms, recent research concludes. Understanding whether wetlands can provide effective coastal protection is essential to developing effective climate change adaptation strategies.

Agricultural intensification can significantly affect soil ecosystems and the services they provide, new research suggests. Examining soils across Europe, the study demonstrates that high intensity arable land uses have lower diversity and biomass of soil organisms than lower intensity arable or permanent grassland, affecting the carbon and nitrogen cycles in the environment.

Climate change, tourism and population growth are all accelerating land degradation in the Mediterranean region, according to recent research. This can have severe impacts: the amount of available agricultural land per capita in the region could have dropped by half by 2020, compared with 1961, the study estimates. This article was updated 6.11.14 to correct an error in the valuation of ecosystem services provided by Mediterranean coastal wetlands.

Despite their general absence from climate policy discussions, the world’s mountain grasslands and shrublands (MGSs) store between 60.5 and 82.8 billion metric tonnes of carbon, a new study estimates - more than three times that of ocean and coastal ecosystems. This research, which is the first to provide a global inventory of carbon stored in MGSs, argues that these ecosystems should be accounted for in climate policy.

New areas of land suitable for agriculture will open up under climate change’s effects, new research predicts, particularly in far northern regions of the world. However, the overall quality of land for farming will decline and many regions, including Europe, could lose large areas of suitable land.