Martin Hejda

TL;DR: In this paper, the authors present a global meta-analysis of 199 articles reporting 1041 field studies that in total describe the impacts of 135 alien plant taxa on resident species, communities and ecosystems.

TL;DR: It is shown that there is no universal measure of impact and the pattern observed depends on the ecological measure examined, and some species traits, especially life form, stature and pollination syndrome, may provide a means to predict impact, regardless of the particular habitat and geographical region invaded.

TL;DR: Assessing the impact of 13 species invasive in the Czech Republic on a wide range of plant communities found Tall invading species capable of forming populations with the cover markedly greater than that of native dominant species exert the most severe effects on species diversity and evenness.

TL;DR: The strong influence of economic and demographic variables on the levels of invasion by alien species demonstrates that future solutions to the problem of biological invasions at a national scale lie in mitigating the negative environmental consequences of human activities that generate wealth and by promoting more sustainable population growth.

TL;DR: Overall, alien species impacts are heterogeneous and not unidirectional even within particular impact types, and by the time changes in nutrient cycling are detected, major impacts on plant species and communities are likely to have already occurred.