It was surveyed for diatoms in 1984 and 1999, the changes being consistent with the pH of the lake having increased however diatoms from sediment cores indicate a decrease in tarn pH from 6.3 to 5.8.
It was surveyed for diatoms in 1984 and 1999. This is what the changes being consistent with the pH of the lake having increased however diatoms from sediment cores indicate a decrease in tarn pH from 6.3 to 5.8.