Williamsport, Ohio – Sweat covers Isaac Barnes’s face under his beekeeping veil while transporting honeycomb boxes from his hives to his truck. It is an exercise in what it feels like a sauna as temperatures increase at the end of the morning of June.
Although Barnes was hot, his bees had even more. Their body temperatures can be up to 15 ° C (27 ° F) higher than the air that surrounds them. As global temperatures increase due to climate change, scientists are trying to better understand the effects on wild and managed bees as crops pollinate, collect nectar, produce honey and reproduce.
They noticed that flying bees that collected nectar avoided overheating on the hottest days using less but stronger floude to maintain the temperature of their body below hazardous levels, according to a study published last year. Scientists also say that bees, like people, can also face retiring to a cooler environment, such as shadow or their nest.
‘Just as we are going to the shade, or we sweat or work less, bees actually do exactly the same to avoid heat,’ Jon Harrison said, environmental physiologist at Arizona State University and one of the study authors.
But that means that bees cannot do what they normally do, said Kevin McCluney, Bowling Green State University Biology.
‘They don’t go looking for more nectar. They do not mate. They are not doing the things that the bees would do otherwise, ‘said McCluney.
Heat is just a challenge for critical pollinizer. Generally, most bees are tolerant of heat, but as the weather heated, some experts believe that their ability to defend against diseases and collect food could become more difficult. And the loss of habitat, the increase in the use of pesticides, diseases and lack of fodder for both wild bees and for the managers are listed as possible taxpayers to the global decrease of bees and other pollinators.
‘If you are not well fed, and your body is intoxicated with pesticides and you have many diseases in your body, you will be less heat tolerant than if you were healthy, “said Margarita López-Uibe, health expert of the pollinators of the Pennsylvania State University.
Earlier this year, the preliminary results of the US Annual Beekeeping Survey found that the beekeepers lost almost 56% of their managed colonies, the greatest loss since the survey began in 2010.
Almost all colonies of housing bees managed in the United States are used to pollinate agricultural crops such as almonds, apples, cherries and blueberries. Less pollinators can lead to less pollination and potentially lower yields.
“It’s a very fragile system if you think about it,” said López-Uibe. ‘Because if something goes wrong, you have these super high value crops that will not get enough bees for pollination.’
Back in the hives of Barnes in Ohio, thousands of honey bees fly around while he collects boxes to take his farm for honey production. Near there, a couple of their bees land in algodoncillo flowers, a rare little plant diversity in an area dominated by corn and soy fields.
For Barnes, who operates Honeyrun Farm with his wife, Jayne, one of the challenges that heat can raise to his 500 hung hives is to defend himself from parasite mites that threaten bees. If temperatures get too hot, you cannot apply formic acid, an organic chemist that kills mites. If applied when it’s too hot, bees could die.
Last year they lost almost a third of the 400 hives that sent California to help pollinate commercial almond orchards. Barnes believes that these hives may have been in poor health before pollination because they could not defend themselves against mites when it was hot months before.
“Dead hives are not pollinating almonds,” he said. “It is a true domino effect that goes back to heat in the summer. ‘
Sometimes heat helps. Here in Ohio, Barnes’s hives last summer produced an abundant honey harvest while fed on the close soy nectar as the plants flourished in the heat. Even so, the lack of diverse plants for bees to forage in an area dominated by corn and soy fields is not ideal.
And even the native flowers are appearing erratically, Barnes said. In autumn, their bees look for food in gold, but those flowers are appearing later. And even then, he has complemented his hive with additional food to keep them healthy until winter.
‘Every plant that blooms is something that the bee can use,’ said Barnes. ‘And each plant is affected by climate change.’
It is only in the last decade that people have realized the magnitude of the decrease in pollinators worldwide, said Harrison, of the Arizona State University. The data is limited about how much climate change and heat stress are contributing to the decrease in pollinators.
“It’s a relatively new approach to biology,” he said. ‘I think it’s super important, but not being studied much.’
The budget proposed by the administration of Donald Trump would eliminate the research program that finances the USGS bees laboratory, which supports the inventory, monitoring and natural history of wild bees of the nation. Other subsidies for bees investigation are also in danger.
The United States Senator Jeff Merkley, from Oregon, said that US pollinators are in ‘serious danger’ and that he will fight for federal financing. Polinizers contribute to the health of the planet, the crops we cultivate and the food we eat, he said.
‘Instead of taking bold measures to protect them, Donald Trump’s administration has proposed an imprudent budget that would eliminate financing for critical research aimed at saving important pollinators,’ he told The Associated Press.
Harrison said his research on this issue would stop if cuts are made to federal financing, and it would be more difficult in general for scientists to study the disappearance of bees and other pollinators and improve how they prevent these losses. Not being able to manage these deaths of pollinators could cause the price of fruits, vegetables, nuts, coffee and chocolate to increase or become scarce.
‘Happily, even if such research is definanced in the United States, such research will continue in Europe and China, preventing these extreme scenarios,’ said Harrison.
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