Climate change‐induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions

摘要: Emissions of biogenic volatile organic compounds (BVOCs) have been earlier shown to be highly temperature sensitive in subarctic ecosystems. As these ecosystems experience rapidly advancing pronounced climate warming, we aimed investigate how warming affects the BVOC emissions long term (up 13 treatment years). We also assess whether increased litterfall resulting from vegetation changes would affect emissions. The study was conducted a field experiment with factorial open-top chamber and annual litter addition treatments on heath Abisko, northern Sweden. After 11 years, BVOCs were sampled plant communities experimental plots using push–pull enclosure technique collection into adsorbent cartridges during growing season analyzed gas chromatography–mass spectrometry. Plant species coverage by point intercept method. Warming 2 °C caused 2-fold increase monoterpene 5-fold sesquiterpene emissions, averaged over all measurements. When momentary effect diminished standardization fixed temperature, still had significant suggesting that indirectly increased. This indirect appeared result composition. increases emission rates some groups, especially when combined warming. both largest highest under probably changed composition due alleviated nutrient limitation stimulated microbial production BVOCs. suggest induced will major factor affecting potentials