Data from: Rising atmospheric CO2 is reducing the protein concentration of a floral pollen source essential for North American bees

Lewis H. Ziska, Jeffery S. Pettis, Joan Edwards, Jillian E. Hancock, Martha B. Tomecek, Andrew Clark, Jeffrey S. Dukes, Irakli Loladze & H. Wayne Polley
At present, there is substantive evidence that the nutritional content of agriculturally important food crops will decrease in response to rising levels of atmospheric carbon dioxide, Ca. However, whether Ca-induced declines in nutritional quality are also occurring for pollinator food sources is unknown. Flowering late in the season, goldenrod (Solidago spp.) pollen is a widely available autumnal food source commonly acknowledged by apiarists to be essential to native bee (e.g. Bombus spp.) and honeybee (Apis...
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