The global nitrogen cycle has been greatly perturbed by human activities resulting in
elevated nitrogen deposition in many parts of the world. The threat nitrogen deposition …

The purpose of a 'red list'is to provide an assessment of the conservation status of taxa,
particularly in relation to their risk of extinction, using internationally recognised and agreed …

In Europe and, increasingly, the rest of the world, the key policy tool for the control of air
pollution is the critical load, a level of pollution below which there are no known significant …

Questions Has plant species richness in semi‐natural grasslands changed over recent
decades? Do the temporal trends of habitat specialists differ from those of habitat …

Experimental studies have shown that deposition of reactive nitrogen is an important driver
of plant community change, however, most of these experiments are of short duration with …

Heavy metal pollution is widespread, and has an increasing trend in some countries and
regions. It can be easily accumulated in plants, leading to plant species loss and affecting …

Finally I list seven challenges of particular importance for progress in DM:(1) that more
knowledge of patterns of natural variation is needed;(2) that a better mechanistic …

Lead (Pb) contamination has become an important abiotic stress that negatively influences
crop biomass and yield, threatening human health via food chains. The excavation of causal …

Question Does eutrophication drive vegetation change in pine forests on nutrient deficient
sites and thus lead to the homogenization of understorey species composition? Location …

Questions Which trends and patterns of community change occurred in Nardus grasslands
over recent decades in parts of the Continental biogeographic region of Germany? Are …