Abstract
There is good, but not conclusive, evidence that sulfur dioxide is the pollutant which deleteriously affects lichens. The distribution of many lichens in London corresponds closely with the concentrations of sulfur dioxide. Low humidity is also a factor. Apart from actually killing lichens, increasing air pollution can render certain species incapable of colonizing new surfaces, although the old thalli themselves are able to survive as relicts. Until the early nineteenth century air pollution affected the lichen flora only in the small built-up area of London. The halting of building around London since 1938 has brought stability to the lichen vegetation of the area, and since then changes have been minor ones. Recent changes in pollution emissions have had little effect on the lichen flora between 1950 and 1967. This is to be expected as sulfur dioxide concentrations have remained fairly constant at ground level.
Citation Formats
Laundon, J R.
Lichen flora of London: effects of air pollution.
United Kingdom: N. p.,
1967.
Web.
Laundon, J R.
Lichen flora of London: effects of air pollution.
United Kingdom.
Laundon, J R.
1967.
"Lichen flora of London: effects of air pollution."
United Kingdom.
@misc{etde_5662054,
title = {Lichen flora of London: effects of air pollution}
author = {Laundon, J R}
abstractNote = {There is good, but not conclusive, evidence that sulfur dioxide is the pollutant which deleteriously affects lichens. The distribution of many lichens in London corresponds closely with the concentrations of sulfur dioxide. Low humidity is also a factor. Apart from actually killing lichens, increasing air pollution can render certain species incapable of colonizing new surfaces, although the old thalli themselves are able to survive as relicts. Until the early nineteenth century air pollution affected the lichen flora only in the small built-up area of London. The halting of building around London since 1938 has brought stability to the lichen vegetation of the area, and since then changes have been minor ones. Recent changes in pollution emissions have had little effect on the lichen flora between 1950 and 1967. This is to be expected as sulfur dioxide concentrations have remained fairly constant at ground level.}
journal = []
volume = {3}
journal type = {AC}
place = {United Kingdom}
year = {1967}
month = {Jan}
}
title = {Lichen flora of London: effects of air pollution}
author = {Laundon, J R}
abstractNote = {There is good, but not conclusive, evidence that sulfur dioxide is the pollutant which deleteriously affects lichens. The distribution of many lichens in London corresponds closely with the concentrations of sulfur dioxide. Low humidity is also a factor. Apart from actually killing lichens, increasing air pollution can render certain species incapable of colonizing new surfaces, although the old thalli themselves are able to survive as relicts. Until the early nineteenth century air pollution affected the lichen flora only in the small built-up area of London. The halting of building around London since 1938 has brought stability to the lichen vegetation of the area, and since then changes have been minor ones. Recent changes in pollution emissions have had little effect on the lichen flora between 1950 and 1967. This is to be expected as sulfur dioxide concentrations have remained fairly constant at ground level.}
journal = []
volume = {3}
journal type = {AC}
place = {United Kingdom}
year = {1967}
month = {Jan}
}