|Source: University of Vermont|
The first national study to map U.S. wild bees suggests they’re disappearing in many of the country’s most important farmlands — including California’s Central Valley, the Midwest’s corn belt and the Mississippi River valley.Wild bees on the decline in key US agricultural ecosystems – study | US news | The Guardian
If losses of these crucial pollinators continue, the new nationwide assessment indicates that farmers will face increasing costs — and that the problem may even destabilize the nation’s crop production.
The findings were published Dec. 21 in the Proceedings of the National Academy of Sciences.
US wild bee numbers decline as land is converted for biofuel - BBC News
Wild bees, crucial pollinators for many crops, are on the decline in some of the main agricultural regions of the United States, according to scientists who produced the first national map of bee populations and identified numerous trouble spots.
Pesticides stop bumblebees from pollinating apple trees, research shows
The researchers on Monday cited 139 counties as especially worrisome, with wild bee numbers decreasing while farmland for crops dependent on such pollinators is increasing.
The counties included agricultural regions of California such as the Central Valley, as well as the Pacific northwest, the upper midwest and Great Plains, west Texas and the southern Mississippi river valley.
Wild bees in the US have declined in many farming areas according to the first national effort to map their numbers.The study suggests that between 2008 and 2013, the numbers of wild bees went down across almost a quarter of the US.
The researchers say that the conversion of land to grow corn for biofuels is a key element in the decline.
If the trend continues say the scientists, it could drive up costs and destabilise crop production.
Wild bees play an important role in pollinating many US crops and plants. It's estimated that they contribute around $3bn to the value of agriculture every year.
Wild bee decline threatens US crop production: Following Obama's call for pollinator assessment, first-ever national bee map shows much farmland at risk -- ScienceDaily
The first national study to map US wild bees suggests they're disappearing in many of the country's most important farmlands. If losses of these pollinators continue, the new nationwide assessment indicates that farmers will face increasing costs -- and that the problem may even destabilize the nation's crop production.What You Should Know About The Drastic Decline Of Wild Bees
Beyond Honeybees: Now Wild Bees and Butterflies May Be in Trouble | WIRED
Wild bees and butterflies are out on the landscape, making them difficult to count, and a lack of historical baselines makes it challenging to detect long-term trends. Slowly but surely, though, results from field studies and anecdotal reports from experts are piling up. They don’t paint a pretty picture. Many pollinator populations seem to be dwindling.