The number of species of insect associated with various trees
By T. R. E. Southwood
A very frequently quoted study which showed that species of tree which are native to Britain support vastly more species of insects than trees wich are not native - even though they may have been introduced many hundreds of years ago.
Southwood, T. R. E., 1961, The number of species of insect associated with various trees. Journal of Animal Ecology, 30, 1-8.
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