Included in this letter about Lamprothamnium papulosum, is the comment that Ait is likely that, as with other charophytes, its growth is inhibited by the high phosphate levels (above 20 µg/l B not stated whether this concentration is as phosphorus) which result from contamination by human sewage or agricultural waste. Most charophytes, including Lamprothamnium, cannot tolerate prolonged disturbance of the sediments such as when motor boat traffic causes detrital matter to remain in suspension for longer periods than would occur naturally. ... Lamprothamnium papulosum has been found regularly in the Dorset Fleet since the 1890's, and my own investigations suggest that it is present throughout the year.

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