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Long-term monitoring of road verge vegetation

Long-term records are of interest because of changes in occurrence and relative abundance of species dependent on climate. The vegetation of a wide, herb-rich road verge in Gloucestershire has been monitored for many years, initially to establish the effects of herbicides. The vegetation has been sampled in July every year since 1958. A link has been demonstrated between the biomass of plants here and latitudinal movements of the gulf stream (the Atlantic current bringing mild weather to Britain), probably because of variations in the frequency of anticyclonic weather. These studies help us understand the effects of global warming.

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