September 4, 2009
Related ArticlesIncreased Global Temperatures Impact Seed Dispersal in Northern Forests
Research conducted by scientists in Finland indicates that an increase in global temperatures may lead to a greater dispersal of seed and pollen in northern boreal forests. One impact of global warming is the formation of stronger wind currents; it is these wind currents that help spread seeds and pollen over a greater distance.
The research was led by Dr. Anna Kuparinen, a scientist with the ecological genetics research unit in the department of biological and environmental services at the University of Helsinki. Kuparinen and her colleagues analyzed micrometeorological data gathered over a 10-year period by researchers at the Hyytiala Forestry Field Station, located 210 kilometers northwest of Helsinki. Using statistical analysis techniques, the scientists determined that an increase in global temperatures had a positive correlation with increased dispersal of plant seeds and pollen. The scientists also discovered that a temperature change of three degrees Celsius increased the speed at which seeds and pollen were dispersed as well as increased the rate at which plant populations grew.
Research indicates that the long-distance dispersal of seeds and pollen is a key factor in the spatial dynamics of plant genotypes, populations, and communities. As global temperatures increase and seeds and pollen are able to disperse farther, plants may be able to colonize areas where they previously did not exist, helping to ensure their survival in a warming climate.
The results of the scientists' research was published online in the June 10, 2009 edition of the journal Proceedings of the Royal Society B and is found in the September 7, 2009 print edition of the same journal. Other scientists who contributed to the research included Gabriel Katul, Ran Nathan, and Frank M. Schurr.