The large Gunnera's (G. tinctoria and G. manicata) in Europe in relation to EU regulation 1143/2014.

Incorrect labelling of plants in the horticultural trade and misidentification is widespread. For the inspection services of the EU member states, correct identification of G. tinctoria has become important since the species was added to the List of Union concern in accordance with EU regulation 1143/2014 in August 2017.

Post-Invasion Recovery of Plant Communities Colonised by after Mechanical Removal or Herbicide Application and Its Interaction with an Extreme Weather Event.

The interventions that are required for both the control and post-invasion restoration of native plant communities depends on several factors, including the efficacy of the measures that are used and how these interact with environmental factors. Here, we report on the results of an experiment on the effects of mechanical removal and herbicide application on the invasive plant and how an extreme weather event impacted on the invader and on the recovery of native coastal grassland communities. Both removal protocols were largely effective in eradicating mature plants, but the mechanical removal treatment resulted in a major increase in the number of seedlings, which was exacerbated by the extreme event.

Alien plant introductions and greenhouse gas emissions: Insights from Gunnera tinctoria invasions.

Plant invasions represent a major global change in land/vegetation cover with the potential to significantly modify greenhouse gas (GHG) emissions. To get a better understanding of the impacts of terrestrial invasive plants on soil GHG emissions we report, firstly, on experiments conducted on invasive populations of the N-fixing herbaceous species Gunnera tinctoria in Ireland, and secondly, compare our results with published information based on a systematic review of the literature. For G.

Is acclimation required for success in high light environments? A case study using Mycelis muralis (L.) Dumort (Asteraceae).

In the field significant differences in maximum photosynthetic O -exchange rate (P ) were found between leaves of Mycelis muralis (L.) Dumort (Asteraceae) collected from woodland and exposed habitats, with the highest values in the exposed sites- However, there were no differences in the P of leaves collected from plants growing in grikes (fissures in the limestone pavement), of exposed limestone pavement, despite a greater than four-fold difference in the integrated daily irradiance. Leaves of plants from the open pavement had lower photon yields (ø ) and higher dark respiration rates and light compensation points, in comparison to shaded plants.