African swine fever threatens to impact agriculture in China, the world’s biggest pork producer. (Photo credit: Flickr Creative Commons/Neil Turner)
Our weekly round-up compiles stories and news, both from here at Penn and around the world, that highlight the intersection of animal, environmental, and human health.
By Jacob Williamson-Rea
Can China, the world’s biggest pork producer, contain a fatal pig virus? Scientists fear the worst
Science, August 21, 2018
An outbreak of African swine fever has emerged in China. Four provinces in the country’s northeast have reported the virus, which poses a serious threat to the largest pork producer in the world. ASF does not harm humans, but causes internal bleeding, high fever, and death in pigs. Farm workers can spread the disease via contaminated equipment and clothing.
The world’s first floating farm making waves in Rotterdam
BBC, August 17, 2018
Cities may not seem like ideal farm locations, but a Dutch company has built a floating one in a city port. The idea is to reduce the distance between production of the produces and tables where it’s eaten, which limits transport pollution.
Should you get an amber collar for your pet? Probably not.
Slate, August 20, 2018
Several pet companies have released amber collars for pets, claiming the collars will repel ticks and fleas. But might this “natural” solution put pets at greater risk?
Plan bee: The rise of alternative pollinators
The New York Times, August 21, 2018
Honeybees, or Apis mellifera, face consistent threats from pesticides and other problems. As the species’ population declines, farmers are turning to other pollinators, such as the bumblebee or blue orchard bee.
How do you save fish that can’t swim? This vet made them tiny floaties.
The Washington Post, August 23, 2018
A veterinarian designed a unique solution after noticing Leafy Sea dragons struggling to stay afloat at an aquarium.
The battle for the soul of biodiversity
Scientific American, August 23, 2018
As plants and animals disappear at an alarming rate, researchers warn that we’re heading towards a mass extinction. However, an organization tasked with slowing climate change and another with addressing the impending mass extinction can’t seem to reach an agreement.
Cole Jadrosich and Lila Bhide of Facilities and Real Estate Services care for edible growing spaces around campus, including the Penn Community Garden. (Photo: Scott Spitzer)
By Katherine Unger Baillie
Gardening as a pastime can seem so relaxing, even meditative—hands working the soil, communing with nature—yet it also has its share of frustrations: seeds that fail to germinate, plants that wither as temperatures rise, pests of every variety bent on decimating crops before harvest time.
Lila Bhide, coordinator of the University of Pennsylvania’s Community Garden, and Cole Jadrosich, an intern for the Penn Park Orchard, have experienced their share of setbacks when it comes to coaxing plants to bear fruit. Here they share their expertise on growing five different crops commonly found in urban gardens.
One mistake that Bhide herself made this year was to wait too long to get started with her tomatoes. “I see people just putting tomato plants in the ground in June or even July because that’s when it feels hot,” she says. “They’re not going to thrive.” If space allows, she recommends starting them indoors from seed in early spring, then transplanting them outdoors once the risk for frost is past. A rule of thumb for this region is that Mother’s Day is a good time to get tomato plants in the ground.
Once these vining plants get big enough, Bhide says to prune them. “What I usually do is pick one main stem and two main branches—or sometimes I’ll give them three if I’m feeling nice—and just pinch off or trim off the other branches,” she says. “Tomatoes naturally want to vine out so you want to direct them, you don’t want to let them go a million directions.”
Those with shady outdoor spaces may want to steer clear, Bhide notes, as tomatoes are a full-sun crop. They should be supported with trellises or cages. And lovers of Italian cuisine, rejoice; tomatoes pair well with basil growing nearby.
Cucumbers, like tomatoes, are vining plants and also need the support of trellises, “especially if you’re in an urban garden, that will help you create more space,” Bhide says. Cucumbers are mostly water, and, as such, require plenty of water to grow well and develop a nice, smooth flavor. “Make sure they’re well-weeded and give them lots and lots of water,” Jadrosich says.
The jury is out on pruning cucumbers, Bhide says. “Some people do, and some do not.” YouTube has a wealth of videos on techniques, she notes.
Fungal diseases are a common problem of many vegetable plants, including tomatoes and cucumbers. Bhide has sometimes used a copper spray to prevent fungal problems on both crops, and using proper mulch can also ward off such infections.
Perennial herbs like mint, thyme, and oregano are good choices for beginning gardeners. “Herbs are a really good bang for your buck because you can use them almost every day,” Bhide says. Annual herbs like basil and cilantro can also be grown easily in containers.
Though many herbs like sun, Bhide notes, “if you’re in a West Philly rowhouse and don’t get a lot of sun, mint is a good choice; it will grow almost anywhere.”
When it’s time to harvest, cut or pinch back the herbs from the top, leaving the sides. This will encourage the plants to branch out instead of continuing to grow straight and go to seed, Bhide says.
A versatile culinary crop, garlic is not terribly demanding. It’s possible to special order cloves for planting, but Bhide says any organic clove from a grocery store or farmer’s market will suffice. “Plant it around Halloween, then mulch over it and just leave it,” Bhide says.
Garlic is typically ready for harvest some time in July, when several of the leaves die back and turn yellow, says Jadrosich.
Although garlic doesn’t require much care while it is growing, Bhide and Jadrosich say it’s not a foolproof crop. “There has been a huge wave of new pests, like allium leafminer, that target garlic,” Bhide says.
Though most of the other plants mentioned are ready for harvest in the summer, there are plenty of choices for fall gardening as well. Different types of greens, such as lettuce, kale, and collards, can all be started in the garden now to be ready for autumn picking. The cold weather doesn’t hinder them and may even be a help. It’s often said that kale, for example, takes on a sweeter flavor when picked after a frost.
For fall harvest, now is the time to sow greens. Root vegetables such as carrots, beets, and turnips can also be planted now and enjoyed when the weather turns cooler.
Toxic red tides pose a serious threat to marine life. One in Florida (not pictured) has led to a declared state of emergency. (Photo: Alejandro Díaz/Wikimedia Commons)
Our weekly digest compiles stories and news, both from here at Penn and around the world, that highlight the intersection of animal, environmental, and human health.
By Jacob Williamson-Rea
Florida declares a state of emergency as red tide kills animals and disrupts tourism
The Washington Post, August 14, 2018
Red tide, a bloom of toxic algae, has suffocated marine life and shut down local tourism in southwest Florida. Governor Rick Scott has declared a state of emergency.
The ‘zombie gene’ that may protect elephants from cancer
The New York Times, Aug. 14, 2018
Theoretically, large animals should get cancer more frequently than smaller animals because they have more cells, which increases the chance of cell mutation. Elephants, however, have a special gene that can attack potentially cancerous cells, according to a recent study.
Palm oil: A new threat to Africa’s monkeys and apes?
BBC News, Aug. 14, 2018
Palm oil is used as a low-cost ingredient in many foods, cleaning products, and even cosmetics. As demand for such products increases, deforestation to expand oil palm tree acreage threatens native monkeys and apes in places like Indonesia and Malaysia.
A new pesticide may be as harmful to bees as the old one
Science, Aug. 15, 2018
The European Union and Canada have banned the use of several neonicotinoid pesticides, but the United States continues to use them. These pesticides have been found to have a detrimental effect on bee populations, even in low doses.
Not just land heat waves: Oceans are in hot water, too
Associated Press, Aug. 15, 2018
As summer heat waves cause droughts across the world, ocean temperatures have been spiking, too. This seriously threatens coral reefs, kelp forests, and marine life.
You don’t need to worry about Roundup in your breakfast cereal
Slate, Aug. 16, 2018
A new report from the Environmental Working Group states that glyphosate, a chemical found in Monsanto weed killer, may cause serious harm to those exposed to high concentrations. Glyphosate is found in trace amounts in popular breakfast cereals, but the amount is far below the Environmental Protection Agency’s recommended threshold.
John MacDonald, a professor of criminology and sociology, and emergency medicine physician Eugenia South, collaborated on a prior study on environmental stressors and their impact on crime. MacDonald says the lessons learned can be applied to combating heat’s relationship to violence. (Photo: Eric Sucar/University Communications)
By Blake Cole
There are many ways to beat the summer heat: retreating to an air-conditioned space or taking a dip in a pool, to name a few. But when relief is hard to come by—especially common in communities in which resources are stretched thin—data show that high temperatures, combined with high-stress situations, can lead to violent confrontations.
“There’s long been a theory connecting temperatures and crime,” says John MacDonald, a professor of criminology and sociology who researches environmental stressors and their relationship to crime. “Southern states and southern Europe have higher rates of reported homicide and violent crime than northern states or northern parts of Europe. The classic challenge has been singling out the connection from other variables like higher rates of poverty.”
The research has become more sophisticated in recent times, charting specific instances like heat waves and temperature fluctuations in a particular location, and has consistently shown increases in violent crime in comparison to cold weather.
In a temperature-crime analysis published in the Journal of Urban Health, Drexel University researchers polled Philadelphia crime data from 2006 to 2015 and found that during warmer months, violent crime rose by almost double digits when the heat index was 98 degrees compared to days when the temperature was above 57 degrees. During colder months—October through April—crime was up 16 percent on 70-degree days as opposed to 43-degree days.
And it’s not just limited to the U.S., as MacDonald suggests. The BBC reported this past July that data from the London Metropolitan Police show that between April 2010 and June 2018, violent crime was, on average, 14 percent higher when the temperature was above 68 degrees than when it was below 50 degrees, and that harassment and weapons possession offenses were each 16 percent higher.
One factor is community stability, MacDonald says. “Communities that are resource-deprived and don’t have access to air conditioning, or a shopping mall to go to in order to avoid the heat for the day, are under more intense community pressure, and crime is a natural consequence of that.”
And the increase in crime isn’t only related to physiological stressors, he adds. “There is general consensus from a number of studies that finds when you have more people out and about, that there is less street crime. There are more stores open and more eyes on the street. Even if there are more opportunities, there’s a protective effect. During a heat wave there are going to be fewer people out policing each other. There also tends to be increased alcohol consumption due to people trying to rehydrate, which leads to a perfect storm of bad judgment.”
So how does a city combat a phenomenon dictated by nature? MacDonald has studied a similar dynamic when it comes to habitat and crime. In a recent study, he and Penn Medicine physician Eugenia South, found that mental health improved when vacant lots were remediated.
“There’s a physiological response when people are exposed to green lots. Their heart rate tends to slow down. Where do people often go when they take a vacation? To the ocean to look out on the water and cool off, or they go to the mountains. Is that just tradition or is there something about a comfortable environment that decreases irritability and other gateway emotions to violence? This same dynamic applies to temperature.”
When it comes to heat, MacDonald says there are practical policy implications to be found that would improve both the community and personal well-being.
“If we have this spike in serious assaults and homicides during heat waves, you could imagine interventions like providing more access to cooling centers and access to drinking water,” MacDonald says. “Hospitals could staff up and you could have better police presence in high-risk areas. Better preparation is really the key.”
After eating raw centipedes at a market, two unfortunate people have contracted the rat lungworm parasite. (Photo credit: Flickr Creative Commons/Yun Huang Yong)
By Jacob Williamson-Rea
Two people got rat lungworm from eating raw centipedes. Could you be next?
Popular Science, July 31, 2018
Two people contracted rat lungworm by eating raw centipedes, but the parasite can be found in other foods, too: shrimp, frogs, crabs, even a piece of poorly washed lettuce with slime or larvae left over from a slug.
A toxic tide is killing Florida wildlife
The New York Times, July 30, 2018
Toxic algal blooms can suffocate biodiversity in coastal areas. Additionally, these same toxins can be sprayed into the air by waves, eventually causing respiratory problems in people living near the water.
The shocking reason that this man’s legs and hands were amputated: A dog’s saliva
The Washington Post, July 31, 2018
In an extremely rare case, a dog’s harmful saliva has found its way into a man’s bloodstream, causing sepsis.
Pollutionwatch: city sparrows’ decline linked to car exhausts
The Guardian, August 2, 2018
The decreasing quality of urban air affects more than just people. Once common in cities across the globe, house sparrow populations are decreasing.
Updated: Deadly Ebola surfaces in Africa’s center yet again
Science, August 2, 2018
Not long after the Democratic Republic of Congo announced an Ebola outbreak had been contained, the disease has now been found in the North Kivu province, with four new cases having been reported.
Rat lungworm disease is popping up in the mainland United States
Science News, August 3, 2018
After the parasitic roundworm’s Angiostrongylus cantonensis larvae hatch in a rat’s lungs, they enter the world via the rat’s excrement. Eating raw centipedes has been the source for several recent cases in China, but others have been reported in the United States, mostly from raw vegetables.