To Help Save Bumble Bees, Plant These Flowers in Your Spring Garden
There are nearly 20,000 known bee species in the world, 4,000 of which are native to the U.S., according to the U.S. Geological Society. Bees pollinate roughly three-quarters of all fruits, nuts and vegetables grown across the country and one of every four bites of food can be credited to bee pollination. But bees are in major decline as nearly 40 percent of honey bees have declined in the last year, according to ABC News. Populations have dropped for a number of reasons, including parasites, pesticides and a lack of flowers on the landscape — all factors that highlight a need for understanding habitat needed to sustain and recover populations.
Working with the Entomological Society of America, scientists set out to determine which flowers bumble bees prefer in an effort to aid land managers seeking to restore critical habitat.
"It's important to consider the availability of plants when determining what's selected for by bees," Jerry Cole, study author and biologist with the Institute for Bird Populations (IBP), said. "Often studies will use the proportion of captures on a plant species alone to determine which plants are most important to bees. Without comparison to how available those plants are, you might think a plant is preferentially selected by bees, when it is simply very abundant."
To come to their conclusions, researchers captured more than a dozen different species of bumblebees on more than 100 different species of flowers in the Sierra Nevada region of California. Researchers recorded what species of flower each bee was captured on and then estimated the number of plants found in each plot. The findings suggest that different bumblebee species select specific flowers even when foraging across the same landscape.
"We discovered plants that were big winners for all bumble bee species but, just as importantly, plant species that were very important for only a single bumble bee species," said Helen Loffland, a meadow species specialist with the Institute for Bird Populations. "This study allowed us to provide a concise, scientifically based list of important plant species to use in habitat restoration that will meet the needs of multiple bumble bee species and provide blooms across the entire annual lifecycle."
The yellow-faced bumble bee (Bombus vosnesenskii) was most abundantly observed. The endangered insects preferred large-leaved lupine (Lupinus polyphyllus) and consistently chose the flowering plant even when others were available. Three of five bumblebee species were found to prefer A. urticifolia, a flowering plant in the mint family.
Some of other favorites? The fuzzy buzzing insects also preferred Oregon checker-mallow (Sidalcea oregana), Alpine mountainbalm (Monardella odoratissima), tall fringed bluebells (Mertensia ciliate) and cobwebby hedge nettle (Stachys albens).
It is important to note that bees likely don't have natural preferences but instead choose flowers based on quality or quantity of nectar or pollen. People should interpret the results with caution because the researchers did not conclude whether plants were being used for pollen or nectar sources, CNN notes.
The U.S. Forest Service says that it is using the study results to identify areas where restoration efforts may make more ample bee habitat.
"This sort of knowledge can really increase the effectiveness of restoration for bumblebees in a way that is relatively easy and cost-effective to implement," said Loffland, adding that the findings can be helpful to landowners who are restoring or managing areas that are habitat for native bees.
- The Insect Apocalypse Is Coming: Here Are 5 Lessons We Must ... ›
- Alarming Decline of Insect Population Linked to Toxic Pesticides in ... ›
- Acting Now Could Save Bugs From Insect Apocalypse - EcoWatch ›
- Coronavirus Lockdowns Keep Bees at Home and Put Crops at Risk - EcoWatch ›
- Bumblebees Trick Plants Into Flowering Early, Study Finds ›
EcoWatch Daily Newsletter
The U.S. reported more than 55,000 new coronavirus cases on Thursday, in a sign that the outbreak is not letting up as the Fourth of July weekend kicks off.
- The U.S. Isn't in a Second Wave of Coronavirus – The First Wave ... ›
- Navajo Nation Has Highest Covid-19 Infection Rate in the U.S. ... ›
- U.S. Coronavirus Cases Top 2 Million as All 50 States Start ... ›
By Jason Bruck
Human actions have taken a steep toll on whales and dolphins. Some studies estimate that small whale abundance, which includes dolphins, has fallen 87% since 1980 and thousands of whales die from rope entanglement annually. But humans also cause less obvious harm. Researchers have found changes in the stress levels, reproductive health and respiratory health of these animals, but this valuable data is extremely hard to collect.
Researchers work with trained dolphins to learn more about their sensory abilities, seen here testing a dolphin's hearing. Jason Bruck / CC BY-ND
A Lot to Learn From Hormones<p>When sampling the blow, we are looking for hormones in mucus as these can be used to gauge psychological and physiological health. We are specifically interested in <a href="https://dx.doi.org/10.1371%2Fjournal.pone.0114062" target="_blank">hormones like cortisol</a> and <a href="https://doi.org/10.1016/j.ygcen.2018.04.003" target="_blank">progesterone</a>, which indicate stress levels and reproductive ability respectively, but can also help determine overall health.</p><p>Additionally, blow samples can detect <a href="https://dx.doi.org/10.1128%2FmSystems.00119-17" target="_blank">respiratory pathogens</a> in the lungs or nasal passages - blowholes evolved from noses after all.</p><p>This health analysis is especially important in areas with oil spills as the chemicals can cause hormonal problems that harm <a href="https://www.carmmha.org/investigating-how-oil-spills-affect-dolphins-and-whales/" target="_blank">development, metabolism and reproduction</a> in dolphins.</p><p>Hormone samples can provide scientists with valuable data, but collecting them from intelligent and unpredictable animals is challenging.</p>
Cetacean Collaborators<p>To build a drone that can stealthily collect spray from moving dolphins, we needed more data on their eyesight and hearing, and this is data that couldn't be collected in the wild nor simulated in a lab.</p><p>We worked with dolphins at facilities like Dolphin Quest in Bermuda, which provides guests opportunities to learn about dolphins while allowing <a href="https://dolphinquest.com/about-us/our-story/" target="_blank">scientists access to animals for noninvasive research</a>. Here the dolphins can swim away if they choose not to work with us, so we had to design the study like a game; the way a kindergarten teacher entertains a class. If the dolphins aren't interested, we don't get to do the science.</p><p>Over the course of hundreds of sessions, we sought to answer two questions: What can dolphins hear and what can they see around their heads?</p><p>To test dolphin hearing, we set up microphones and cameras to record dolphin behavior as we played drone noise in the air. We analyzed the responses to each noise – such as how many dolphins looked at the speaker – and used these as a proxy for their ability to hear the sounds.</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="5f31daf07a652b8d64a093b993ee4e96"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/UjmQeH3vXHI?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Robodolphin doesn't look like a real dolphin, but it doesn't need to in order to train our drone pilots. C.J. Barton / Oklahoma State University / CC BY-ND<p>To build robodolphin, we worked with dolphins trained to "chuff" or sneeze on command to measure spray characteristics. We used high-speed photography to see the dolphins' breath as it moved through the air. Then we conducted high resolution CT scans of a dolphin head and 3D-printed a replica of a nasal passage.</p><p>Now, we have a complete robodolphin and are tweaking its sprays to be nearly identical to the real thing. This will allow us to determine how close we need to get to collect the samples, and therefore, how quiet our drone needs to be.</p>
The replica dolphin blowhole was designed from a scan of a real blowhole passage, and the spray it produces closely matches the real thing. Alvin Ngo, Mitch Ford and CJ Barton / Oklahoma State University / CC BY-ND
A Bit of Practice, Then Into the Wild<p>In the next few months, we will test flights over robodolphin with existing drones to determine the timing and strategy for collection. From there, we will fabricate a low-noise drone that can fly fast enough and with sufficient maneuverability to capture samples from wild dolphins. Like a video game, we will use the visual field data to develop approach trajectories to stay in the visual blindspots.</p><p>We plan to test our drones on a truck-mounted robodolphin moving down a runway, then using a boat to simulate realistic conditions. The next steps will involve ocean testing with dolphins trained for open ocean swimming. These tests will determine if our devices can catch and hold the hormones as the drone flies back to a researcher's boat.</p><p>Finally, we will deploy the system to collect data on wild dolphins. Our first goal is to test resident dolphins – animals that live on the coasts and deal directly with boat and oil industry noise – which will allow us to learn more about stress resulting from human impacts.</p><p>Those samples are a way off, but if all goes well we will have a specially built drone capable of flying long distances and capturing samples undetected in a few years. The samples collected will allow researchers to do better science with impact on the animals they study.</p>
- Drone Footage Captures Rare Finless Porpoises in Hong Kong ... ›
- Brazil's Amazon River Dolphin Faces Extinction After Fishing ... ›
- 10 Surprising Dolphin 'Superpowers' - EcoWatch ›
Sunscreen pollution is accelerating the demise of coral reefs globally by causing permanent DNA damage to coral. gonzalo martinez / iStock / Getty Images Plus
On July 29, Florida Governor Ron DeSantis signed into law a controversial bill prohibiting local governments from banning certain types of sunscreens.
- Your Guide to Reef Friendly Sunscreens - EcoWatch ›
- Hundreds of Sunscreens Don't Work or Have Unsafe Ingredients ... ›
- FDA Study: Sunscreen Chemicals Seep Into the Bloodstream ... ›
By Kelli McGrane
Oat milk is popping up at coffee shops and grocery stores alike, quickly becoming one of the trendiest plant-based milks.
- Is Oat Milk Gluten-Free? - EcoWatch ›
- What Nutritionists Think About Starbucks' Three New Plant-Based ... ›
- 6 Alternatives to Milk: Which Is the Healthiest? - EcoWatch ›
"Emissions from pyrotechnic displays are composed of numerous organic compounds as well as metals," a new study reports. Nodar Chernishev / EyeEm / Getty Images
Fireworks have taken a lot of heat recently. In South Dakota, fire experts have said President Trump's plan to hold a fireworks show is dangerous and public health experts have criticized the lack of plans to enforce mask wearing or social distancing. Now, a new study shows that shooting off fireworks at home may expose you and your family to dangerous levels of lead, copper and other toxins.
- No Social Distancing or Mask Requirement at Trump's Mt ... ›
- Trump's Fireworks Show at Mt. Rushmore Is a Dangerous Idea, Fire ... ›
By Ashutosh Pandey
Billions worth of valuable metals such as gold, silver and copper were dumped or burned last year as electronic waste produced globally jumped to a record 53.6 million tons (Mt), or 7.3 kilogram per person, a UN report showed on Thursday.
Environmental and Health Hazard<p>Experts say e-waste, which is now the world's fastest-growing domestic waste stream, poses serious environmental and health risks.</p><p>Simply throwing away electronic items without ensuring they get properly recycled leads to the loss of key materials such as iron, copper and gold, which can otherwise be recovered and used as primary raw materials to make new equipment, thereby reducing greenhouse gas emissions from extraction and refinement of raw materials.</p><p>Refrigerants found in electronic equipment such as fridge and air conditioners also contribute to global warming. A total of 98 Mt of CO2-equivalents, or about 0.3% of global energy-related emissions, were released into the atmosphere in 2019 from discarded refrigerators and ACs that were not recycled properly, the report said.</p><p>E-waste contains several toxic additives or hazardous substances, such as mercury and brominated flame retardants (BFR), and simply burning it or throwing it away could lead to serious health issues. Several studies have linked unregulated recycling of e-waste to adverse birth outcomes like stillbirth and premature birth, damages to the human brain or nervous system and in some cases hearing loss and heart troubles.</p><p>"Informal and improper e-waste recycling is a major emerging hazard silently affecting our health and that of future generations. One in four children are dying from avoidable environmental exposures," said Maria Neira, director of the Environment, Climate Change and Health Department at the World Health Organization. "One in four children could be saved, if we take action to protect their health and ensure a safe environment."</p>
Europe Leads the Way<p>While most of the e-waste was generated in Asia (24.9 Mt) in 2019, Europe led the charts on a per person basis with 16.2 kg per capita, the report said.</p><p>But the continent also recorded the <a href="https://www.dw.com/en/the-eu-declares-war-on-e-waste/a-51108790" target="_blank">highest documented formal e-waste collection and recycling</a> rate at 42.5%, still below its target of 65%. Europe was well ahead of the others on this front. Asia ranked second with 11.7%.</p><p>The authors said while more that 70% of the world's population was covered by some form of e-waste policy or laws, not much was being done toward implementation and enforcement of the regulations to encourage the take-up of a collection and recycling infrastructure due to lack of investment and political motivation.</p><p>"You have to think about new economic systems," said Kühr.</p><p>One approach could be that consumers no longer buy the products, but only the service they offer. The device would remain the property of the maker, who would then have an interest in offering his customers the best service and the necessary equipment. The maker would also be interested in designing his products in such a way that they are easier to repair and easier to recycle, Kühr said.</p>
- Dangerous Chemicals From E-Waste Found in Black Plastics From ... ›
- Electronic Waste Study Finds $65 Billion in Raw Materials ... ›
- Electronic Waste: New EU Rules Target Throwaway Culture ... ›
- COVID-19 Masks Are Polluting Beaches and Oceans - EcoWatch ›
- Plastic Packaging Use Increases During the Coronavirus - EcoWatch ›
- Coronavirus Worsens Thailand's Plastic Waste Crisis - EcoWatch ›
- Coronavirus Plastic Waste Polluting the Environment - EcoWatch ›