2016-02-26. Decline of Pollinators Poses Threat to World Food Supply, Report Says.

posted Feb 27, 2016, 6:56 AM by Alan Gould
By John Schwartz, The New York Times. For GSS Losing Biodiversity chapter 8. Excerpt: The birds and the bees need help. Also, the butterflies, moths, wasps, beetles and bats. Without an international effort, a new report warns, increasing numbers of species that promote the growth of hundreds of billions of dollars’ worth of food each year face extinction. The first global assessment of the threats to creatures that pollinate the world’s plants was released by a group affiliated with the United Nations on Friday in Kuala Lumpur, Malaysia. The summary will be posted online Monday. Pollinators, including some 20,000 species of wild bees, contribute to the growth of fruit, vegetables and many nuts, as well as flowering plants. Plants that depend on pollination make up 35 percent of global crop production volume with a value of as much as $577 billion a year.  ...pollinator species are threatened with extinction, including some 16 percent of vertebrates like birds and bats, according to the document. Hummingbirds and some 2,000 avian species that feed on nectar spread pollen as they move from flower to flower. Extinction risk for insects is not as well defined, the report notes, but it warned of “high levels of threat” for some bees and butterflies, with at least 9 percent of bee and butterfly species at risk. ...The causes of the pressure on these creatures intertwine: aggressive agricultural practices that grow crops on every available acre eliminate patches of wildflowers and cover crops that provide food for pollinators. Farming also exposes the creatures to pesticides, and bees are under attack from parasites and pathogens, as well. Climate change has an effect, as well, .... A warming world changes the territories of plants and pollinators, and changes the plants’ time of flowering, ... “Will the pollinators be there when the flowers need them?” The group issuing the report, the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, is made up of 124 countries, including the United States, and was formed through the United Nations in 2012....  http://www.nytimes.com/2016/02/27/science/decline-of-species-that-pollinate-poses-a-threat-to-global-food-supply-report-warns.html