Nutrient pulses boost invasive plants in German fields
Researchers from the University of Tübingen and XTBG found that fluctuating fertilizer supplies increased dominance of two invasive species in southwestern Germany.
Field tests show nutrient timing matters
Scientists tested eight field sites invaded by Asian knotweed and Canada goldenrod in southwestern Germany. They compared fixed weekly fertilization with double doses every two weeks against a water-only control group. High variability treatments caused invasive biomass to rise significantly while native communities remained stable. The study published in Basic and Applied Ecology confirms nutrient pulses alter invasion success within one season.
Invasive species gain specific advantages
Aboveground biomass for Asian knotweed increased by 66.1 percent under high variability compared to controls. Canada goldenrod showed an even larger rise of 137.7 percent in the same treatment groups. Low nutrient variability produced no significant effect on either invasive or native plant populations. Total native plant biomass did not change significantly despite the fluctuating fertilizer inputs applied to the sites.
Study leads call for more work
Liao Zhiyong of XTBG stated this is the first field evidence that nutrient variability alone promotes invasion. He added that identifying species benefiting from fluctuating resources becomes essential as environmental variability rises globally. Further research is needed to understand long-term ecosystem responses and effects on additional invasive plant species.
Reported by one outlet
Only one outlet has published this. Nothing here has been checked against a second report, so read it as that outlet's account and follow the link below for the original.
Reported by
1 independent outlet. Headline as published. Links open the original report.