Author:
Hofmann Frieder,Otto Mathias,Wosniok Werner
Abstract
Abstract
Background
Information on pollen dispersal is essential for the risk assessment and management of genetically modified organisms (GMOs) such as Bt maize. We analyzed data on maize pollen deposition at 216 sites in Germany, Switzerland, and Belgium from 2001 to 2010. All data were collected using the same standardized sampling method. The distances between sampling site and the nearest maize field ranged from within the field to 4.45 km.
Results
Maize pollen deposition was negatively correlated with distance from the nearest pollen source. The highest pollen deposition was within the field, but depositions of several thousand pollen grains per square meter were recorded over the kilometer range. A power function model most accurately described the relationship between deposition and distance from the nearest pollen source, rather than the exponential model currently used in EU risk assessment and management, which underestimates exposure for distances greater than 10 m. Regression analysis confirmed the high significance of the power relationship. The large variation in pollen deposition at a given distance reflected the influences of wind direction and other meteorological and site conditions. Plausible variations of single values and the predicted mean pollen count at a given distance were expressed by confidence intervals.
Conclusions
The model described here allows estimations of pollen deposition in relation to distance from the nearest field; therefore, it will be valuable for the risk assessment and management of GMOs. Our results indicate that buffer zones in the kilometer range are required to prevent harmful exposure of non-target organisms to GMOs.
Publisher
Springer Science and Business Media LLC
Reference88 articles.
1. den Nijs HCM, Bartsch D, Sweet J: Introgression from genetically modified plants into wild relatives. CABI Publishing, Wallingford; 2004.
2. Ellstrand NC, Prentice HC, Hancock JF: Gene flow and introgression from domesticated plants into their wild relatives. Annu Rev Ecol Syst 1999, 30: 539–563. 10.1146/annurev.ecolsys.30.1.539
3. Stewart CN, Halfhill MD, Warwick SI: Transgene introgression from genetically modified crops to their wild relatives. Nature 2003, 4: 806–817.
4. Regulation (EC) No 1829/2003 of the European Parliament and of the Council of 22 September 2003 on genetically modified food and feed Off J Eur Union L 2003, 268: 1–23.
5. Regulation (EC) No 1830/2003 of the European Parliament and of the Council of 22 September 2003 concerning the traceability and labelling of genetically modified organisms and the traceability of food and feed products produced from genetically modified organisms and amending Directive 2001/18/EC Off J Eur Union L 2003, 268: 24–28.
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