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Annals of Botany 72: 449-455, 1993
© 1993 Annals of Botany Company

Regional Calcicoly in the Moss Rhytidiadelphus triquetrus: Survival and Chemistry of Transplant at a Formerly SO2-polluted Site with Acid Soil

J. W. Bates

Department of Biology, Imperial College at Silwood Park, Ascot, Berkshire SL5 7PY, UK

The moss Rhytidiadelphus triquetrus has become increasingly restricted to calcareous soils in the countryside around London since the middle of the present century. It has been suggested that this is due either to high SO2 pollution in earlier decades or continuing acidification of precipitation and soils. Intact samples of Rhytidiadelphus carpet (25 x 25 cm) were transplanted from a chalk rendzina at Watlington Hill to clearings in Pleurozium schreberi swards on acid clay soil at Windsor Forest to determine whether conditions are currently unfavourable for Rhytidiadelphus . Some transplants included calcareous soil introduced along with the mosses. Tissue concentration of exchangeable and intracellular Ca, Mg, K and Al were measured in intervals over 381 d. The Rhytidiadelphus transplant remained healthy after 33 months on acid soil. Shoot exchangeable Mg and K rose rapidly on transplantation to Windsor Forest while exchangeable Ca fell significantly only after 1 year. Intracellular K was unaffected by transplantation. Tissue cation levels were little affected by the nature of the soil beneath the transplant but instead reflected the gross chemistry of the receiver site. This indicates that bryophyte nutrient content is mainly influenced by precipitation and throughfall minerals. Soil chemistry may influence feather mosses via indirect pathway such as leaf leachates or dust. Aluminum levels were near the detection limits and did not change significantly in the transplants. The absence of Rhytidiadelphus from acid soils in Windsor Forest is Probably due to historical factors such as previous episode of high SO2 concentrations.Copyright 1993, 1999 Academic Press

Rhytidiadelphus triquetrus, Pleuroziums schreberi, SO2, acid rain, aluminum, calcium, magnesium, potassium


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 ANN BOT (LOND)Home page
B. BHARALI and J. W. BATES
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Ann. Bot., February 1, 2006; 97(2): 257 - 263.
[Abstract] [Full Text] [PDF]

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 ANN BOT (LOND)Home page
B. BHARALI and J. W. BATES
Soil Cations Influence Bryophyte Susceptibility to Bisulfite
Ann. Bot., September 1, 2002; 90(3): 337 - 343.
[Abstract] [Full Text] [PDF]


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