Posted on December 1, 2015 by Bob Berwyn
Bees are only part of the pollinator equation. Other insects also play an important role. @bberwyn photo.
Global reliance on honeybees for pollination is a risky strategy
Australian scientists say it’s important to consider other pollinators besides bees when deciding on the application of pesticides. Farmers using pesticides that spare bees but kill other insects might be ignoring important sources of crop pollination, the new study found.
“Many crops — including mangoes, custard apples, kiwi fruit, coffee and canola — depended on non-bee insect pollinators such as flies, butterflies, moths, beetles, wasps, ants, and thrips,” said University of Queensland plant ecologist Dr Margie Mayfield. Continue reading
Filed under: agriculture, Environment, plants and flowers | Tagged: agriculture, Environment, honeybee decline, honeybees, pollinators | Leave a comment »
Posted on November 1, 2015 by Bob Berwyn
Agricultural runoff has left many major rivers polluted with nitrates.
‘Unfortunately, there is no widespread evidence of improving conditions …’
Massive efforts to improve water quality haven’t been effective in many large U.S. rivers, where nitrate levels remain at high levels after surging in the second half of the 20th century.
Between 1945 and 1980, nitrate levels in large U.S. rivers increased up to fivefold as chemical fertilizer use increased dramatically in the Midwest. In some urbanized areas along the East and West coasts during the same period, river nitrate levels doubled.
In recent decades, nitrate changes have been smaller but nitrate levels have remained high in most of the rivers examined in a new U.S. Geological Survey study. Continue reading
Filed under: Environment, rivers, water, water quality | Tagged: agriculture, fertilizers, nitrate pollution, rivers, water pollution, water quality | 1 Comment »
Posted on October 13, 2015 by Bob Berwyn
New study offers more clues on neonicotinoids and bees
When it comes to bees, not all pesticides are equally toxic, federal scientists said after studying 42 common pesticides in a field trial.
With honeybee populations declining at an alarming rate, the new findings may give farmers and regulators some tools to guide pesticide applications. Continue reading
Filed under: Environment | Tagged: agriculture, honeybees, neonicotinoids, pesticides | Leave a comment »
Posted on September 21, 2015 by Bob Berwyn
Shifting to sustainable land use practices would boost global economy and help address global warming
Unsustainable land use practices, exacerbated by climate change, could result in mass migration of 50 million people within 10 years. Photo courtesy UN.
Unsustainable land-use practices are a $6.3 trillion drain on the global economy, according to a new report from the United Nations University, which assesses the value of ecosystem services provided by land resources such as food, poverty reduction, clean water, climate and disease regulation and nutrients cycling.
That figure is equal to about 15 percent of global GDP, the researcher said, adding that unchecked land degradation could force up to 50 million people to migrate away from affected areas within the next 10 years.
Effectively addressing land degradation could help avert that humanitarian crisis and add US $75.6 trillion to annual world income, according to the report, “The Value of Land”, produced by The Economics of Land Degradation Initiative.
Filed under: agriculture, climate and weather, Environment | Tagged: agriculture, climate change, development, Environment, sustainable land use | Leave a comment »
Posted on August 31, 2015 by Bob Berwyn
Latest water skirmish ends with win for fish
Spawning salmon. Photo courtesy NOAA.
FRISCO — Life has been tough for California’s freshwater fish during the state’s extended drought. But some salmon in the northern part of the state will have a fighting chance after a federal judge last week decided to maintain a key flow program aimed at boosting flows in the Trinity River.
The Trinity is a tributary of the Klamath River, where major salmon runs are currently facing the threat of a major fish kill due to the drought. U.S. Judge Lawrence O’Neill, based on Fresno, California, ruled that the risks from shutting down a federal program to release additional reservoir water to protect the salmon were too great, and the potential benefit to irrigators too uncertain. Continue reading
Filed under: climate and weather, Drought, Environment, global warming | Tagged: agriculture, California drought, climate change, drought, salmon runs, Trinity River | 1 Comment »
Posted on June 17, 2015 by Bob Berwyn
Wild bees need love, too. @bberwyn photo.
‘protecting a wide variety of our wild bees is crucial …’
FRISCO — A new bee tracking study shows that protecting wild bees may be just as important as tackling the decline of domesticated honeybee colonies.
After tracking bees around the world, researchers concluded that only two percent of wild bee species pollinate 80 percent of bee-pollinated crops worldwide.
That means there’s a powerful economic rationale for conserving wild bees. It calculates the value of wild bee pollination to the global food system at $3,000 per hectare of insect-pollinated agricultural land, amounting to billions of dollars globally. Continue reading
Filed under: agriculture, biodiversity, Environment | Tagged: agriculture, biodiversity, Environment, pollinators, wild bees | Leave a comment »
Posted on May 14, 2015 by Bob Berwyn
A widely used class of pesticides is probably responsible for a massive honeybee die-off. @bberwyn photo.
Annual survey shows disturbing rise in summer bee colony losses
FRISCO — Commercial beekeepers took another big hit last summer, reporting that they lost more than 40 percent of their honey bee colonies during the past year. Summer losses were higher than winter losses for the first time in five years, stoking concerns over the long-term trend of poor health in honey bee colonies, according to University of Maryland scientists. Continue reading
Filed under: agriculture, biodiversity, Environment | Tagged: agriculture, Environment, food, honey bee colony collapse, honey bee decline, neonicotinoids, pesticides | Leave a comment »