> The ecological consequences of widespread pollinator declines could be substantial, but they could be difficult to detect because seed production varies dramatically in response to many biotic and abiotic factors. 

> There is little available evidence to suggest that recent pollinator declines in North America have resulted in smaller populations of wild plants, possibly because the challenges of obtaining evidence are formidable. More research is needed to assess ecological consequences of current and future pollinator declines.

STATUS OF POLLINATORS IN NORTH AMERICA. 
Committee on the Status of Pollinators in North America, National Research Council

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