Performance of terrestrial bryophytes as biomonitors of atmospheric pollution. A review

Toxicological and Environmental Chemistry

Volumn 68, Issue 1-2, 1999, Pages 179-220

  Tessier, Louis ^a   Boisvert, Jacques L ^a  

^a UNIVERSITÉ DU QUÉBEC À TROIS RIVIÈRES   (Canada)

Author keywords

Abiotic; Atmospheric pollution; Biomonitors; Biotic; Terrestrial bryophytes

Indexed keywords

AIR POLLUTION; BIOLOGICAL MONITORING; BRYOPHYTE; LICHEN; MOSS;

ASSESSMENT METHOD; ATMOSPHERIC POLLUTION; BIOMONITORING; BRYOPHYTE;

BRYOPHYTA; BRYOPHYTES; PTERIDOPHYTA;

EID: 0032945829     PISSN: 02772248     EISSN: None     Source Type: Journal    
DOI: 10.1080/02772249909358655     Document Type: Article

References (124)

1. Addison, P. A. and K. J. Puckett. 1980. Deposition of atmospheric pollutants as measured by lichen element content in the Athabasca oil sands area. Can. J. Bot., 58: 2323-2334.
2. Al-Radady, A. S., B. E. Davies and M. J. French. 1993. A new design of moss bag to monitor metal deposition both indoors and outdoors. Sci. Total Environ., 133: 275-283.
3. Archibold, O. W. 1985. The metal content of wind-blown dust from uranium tailings in northern Saskatchewan. Water Air Soil Pollut., 24: 63-76.
4. Armstrong, R. A. 1976. Studies on the growth rates of lichens. In Lichenology: Progress and Problems. D. H. Brown, D. L. Hawksworth and R H. Bailey (eds.). Academic Press, London, pp. 309-322.
5. Baldi, F. 1988. Mercury pollution in the soil and mosses around a geothermal plant. Water Air Soil Pollut., 38: 111-119.
6. Bargagli, R. 1993. Plants leaves and lichens as biomonitors of natural or anthropogenic emissions of mercury. In Plants as Biomonitors. Indicators for heavy metals in the terrestrial environments. B. Merkert (ed.). VCH, Weinheim, Chap. 21. pp. 461-484.
7. Bargagli, R. 1995. The elemental composition of vegetation and the possible incidence of soil contamination of samples. Sci. Total Environ , 176: 121-128.
8. Bargagli, R., F. P. Ioseo, and C. Barghigiani. 1987. Assessment of mercury dispersal in an abandoned mining area by soil and lichen analysis. Water Air Soil Pollut., 36: 219-225.
9. Bargagli, R., C. Barghigiani, B. Z. Siegel, and S. M. Siegel. 1989. Accumulation of mercury and other metals by the lichen, Parmelia sutcata, at an Italian minesite and a volcanic area. Water Air Soil Pollut., 45: 315-327.
10. Beckett, R. P., L. J. R. Boileau, D. Padovan, and D. H. S. Richardson 1982. Lichens and mosses as monitors of industrial activity associated with uranium mining in northern Ontario, Canada-Part 2: Distance dependent uranium and lead accumulation patterns. Environ. Pollut. Ser. B., 4: 91-107.
11. Beckett, R. P. and D. H. Brown. 1984, The relationship between cadmium uptake and heavy metal tolerance in the lichen genus Peltigera. New Phytol. 97: 301-311.
12. Bennett, J. P. 1995. Abnormal chemical element concentrations in lichens of isle Royale National Park. Environ. Exp. Bot., 35: 259-277.
13. Berg, T., O. Røyset, E. Steinnes, and M. Vadset. 1995. Atmospheric trace element deposition: Principal component analysis of ICP-MS data from moss samples. Environ. Pollut. 88: 67-77.
14. Boonpragob, K. and T. H. Nash III. 1990. Seasonal variations of elemental status in the lichen Ramalina menziestl Tayl. from two sites in southern California; Evidence for dry deposition accumulation. Environ, Exp. Bot., 30: 415-428.
15. Brown, D. H. 1976. Mineral uptake by lichens. In Lichenology: Progress and Problems. D. H. Brown, D. L. Hawksworth and R H. Bailey (eds.). Academic Press. London. pp. 419-439.
16. Brown, D. H. 1982. Mineral nutrition. In Bryophyte Ecology. A .J. E. Smith (ed.). Chapman and Hall, London. Chap. 11. pp. 383-444.
17. Brown, D. H. 1984. Uptake of mineral elements and their use in pollution monitoring. In The experimental biology of bryophytes. A.F. Dyer and J.G Duckett (eds.). Academic Press, New-York. pp. 229-255.
18. Brown, D H. and R. P. Beckett, 1985a. The role of the cell wall in the intracellular uptake of cations by lichens. In Lichen physiology and cell biology. D. H. Brown (ed.). Plenum Press, New York. pp. 247-258.
19. Brown, D. H. and P. Beckett. 1985b. Intracellular and extracellular uptake of cadmium by the moss Rhytidiadelphus squarrosus. Ann. Bot. 55: 179-188.
20. Brown, D. H. and R. M. Brown. 1990. Reproducibility of sampling for element analysis using bryophytes. In Element concentration cadasters in ecosystems. Methods of assessment and evaluation. H. Lieth and B. Markert (eds.). VCH, Weinheim. pp. 55-62.
21. Brown, D. H. and J. M. Wells. 1990. The extracellular and intracellular uptake of inorganic chemicals by bryophytes. In Bryophytes their chemistry and chemical taxonomy. H.D. Zinsmeister and R Mues (eds) Clarendon Press, Oxford. pp. 299-318.
22. Bruteig, I. E. 1993 The epiphytic lichen Hypogymnia physodes as a biomonitor of atmospheric nitrogen and sulphur deposition in Norway, Environ Monit Assess., 26 27-47.
23. Burton, M. A. S. 1990. Terrestrial and aquatic bryophytes as monitors of environmental contaminants in urban and industrial habitats. Bot. J. Linn. Soc., 104: 267-280.
24. Calberg, G. E., E. B. Ofstad H. Drangholt and E. Steinnes. 1983. Atmospheric deposition of organic micropollutants in Norway studied by means of moss and lichen analysis. Chemosphere, 12: 341-356.
25. Campbell, J. A. 1976. A mathematical treatment of the variation of heavy-metal content of lichens with distance from a source. Lichenologist, 8: 83-86.
26. Chamberlin, A. 1970. Interception and retention of radioactive aerosols by vegetation, Atmos. Environ., 4: 57-58.
27. Clough, W. S. 1975. The deposition of particulates on moss and grass surfaces, Atmos. Environ., 9: 1113-1119.
28. 137cesium in fruticose lichens of northern Québec. Sci. Total Environ., 121: 217-230.
29. Davies, F. B. M. and G. Notcutt. 1988. Accumulation of fluoride by lichens in the vicinity of Etna volcano. Water Air Soil Pollut., 42: 365-371.
30. De Bruin, M. and E Hackenitz. 1986. Trace element concentrations in epiphytic lichens and bark substrate. Environ. Pollut Ser. B., 11: 153-160.
31. De Bruin, M. 1987. Some aspects of the use of epiphytic lichens as biological monitors for heavy metal air pollution. In International conference on heavy metals in the environment, New Orleans, Sept. 1987. Symposium Proceedings. Vol. 2. S.E Lindberg and T.C. Hutchinson (eds.). CEP Consultants Ltd. Edinburgh, pp. 130-133.
32. Gailey, F. A. Y. and O. L. Lloyd. 1986a. Methodological investigations into low technology monitoring of atmospheric metal pollution: Part 1- The effects of sampler size on metal concentrations. Environ. Pollut. Ser. B., 12: 41-59.
33. Gailey, F. A. Y. and O. L. Lloyd. 1986b. Methodological investigations into low technology monitoring of atmospheric metal pollution: Part 2- The effects of length of exposure on metal concentrations. Environ. Pollut. Ser. B., 12: 61-74.
34. Gailey, F. A. Y. and O. L. Lloyd. 1986c. Methodological investigations into low technology monitoring of atmospheric metal pollution: Part 3- The degree of replicability of the metal concentrations. Environ. Pollut. Ser. B., 12: 85-109.
35. Gailey, F. A. Y. and O. L. Lloyd. 1986d. Atmospheric metal pollution monitored by spherical moss bags A case study of Armadale. Environ. Health Perspect., 68: 187-196.
36. Gailey, F. A. Y. and O. L. Lloyd 1993. Spatial and temporal patterns of airborne metal pollution: the value of low technology sampling to an environmental epidemiology study. Sci. Total Environ., 133: 201-219.
37. Garty, J. 1993. Lichens as biomonitors for heavy metal pollution. In Plants as Biomonitors. Indicators for heavy metals in the terrestrial environments. B. Merkert (ed.). VCH, Weinheim. Chap. 9. pp. 193-263
38. Garty, J., M Galun M. Kessel. 1979. Localization of heavy metals and other elements accumulated in the lichen thallus. New Phytol., 82: 159-168.
39. Garty, J. and C. Fuchs. 1982. Heavy metals in the lichen Ramalina duriaiei transplanted in biomonitoring stations. Water Air Soil Pollut., 17: 175-183.
40. Garty, J., M. Galun and Y. Hochberg. 1986. The accumulation of metals in Caloplaca aurantia growing on concrete roof tiles. Lichenologist. 18: 257-263.
41. Garty, J. and J. Hagemeyer. 1988. Heavy metals in the lichen Ramalina duriaei transplanted at biomonitoring stations in the region of coal-fired power plant in Israel after 3 years of operation. Water Air Soil Pollut., 38: 311-323.
42. Gignac, L. D 1987. Ecological tolerance and niche structure of Sphagnum along a pollution gradient near Sudbury, Ontario. Canada. Can. J. Bot., 65: 1268-1274
43. Gjengedal, E. and E. Steinnes. 1990. Uptake of metal ions in moss from artificial precipitation. Environ Monit. Assess., 14: 77-87.
44. Glooschenko, W. A. 1989. Sphagnum fuscum moss as an indicator of atmospheric cadmium deposition across Canada. Environ Pollut., 57: 27-33.
45. Glooschenko, W A and A De Benedetti. 1983 Atmospheric deposition of iron from mining activities in northern Ontario. Sci. Total Eviron., 32: 73-79.
46. Glooschenko, W. A. and N. Arafat 1988. Atmospheric deposition of arsenic and selenium across Canada using Sphagnum moss as a biomonitor. Sci Total Environ., 73: 269-275.
47. Goodman, G. T. and T. M. Roberts. 1971. Plants and soils as indicators of metals in air. Nature (London), 231; 287-292.
48. Gough, L. P., R. C. Severson, and L. L. Jackson 1994. Baseline element concentrations in soils and plants, Bull Island. Cape Romain national wildlife refuge, South Carolina, USA. Water Air Soil Pollut., 74: 1-17.
49. Goyal, R. and M. R. D. Seaward. 1981a. Metal uptake in terricolous lichens I. Metal localization within the thallus. New Phytol., 89: 631-645.
50. Goyal, R. and M. R. D. Seaward. 1981b. Lichen ecology of the Scunthorpe Heathlands. II. Industrial metal fallout pattern from lichen and soil assays. Lichenalogist . 13: 289-300.
51. Grodzin̄ska, K. 1982. Monitoring of air pollutants by mosses and tree bark. In Monitoring of air pollutants by plants. Methods and problems. Proceedings of the international workshop, Osnabrtick (F.R.G.), September 24-25, 1981. L. Steubing and H. -J. Jäger (eds.). Dr W. Junk Publishers. The Hague. pp. 33-42.
52. Grodzin̄ska, K., G. Szarek, and B. Godzik. 1990, Heavy metal deposition in polish national parks-changes during ten years. Water Air Soil Pollut., 49: 409-419.
53. Gustafsson, L. and I. Eriksson. 1995. Factors of importance for the epiphytic vegetation of aspen Populus tremula with special emphasis on bark chemistry and soil chemistry. J. Appl. Ecol., 32: 412-424.
54. Hale, M. E. and J. D. Lawrey. 1985. Annual rate of lead accumulation in the lichen Pseudoparmelia baltimorensis. Bryologist, 88: 5-7.
55. Herrmann, R. 1990. Biomonitoring of organic and inorganic trace pollutant by means of mosses. In Bryophytes their chemistry and chemical taxonomy. H.D. Zinsmeister and R. Mues (eds.), Clarendon Press, Oxford. pp. 319-335.
56. Himberg, K. K. and P. Pakarinen. 1994. Atmospheric PCB deposition in Finland during 1970s and 1980s on the basis of concentrations in ombrotrophic peat mosses (Sphagnum). Chemosphere, 29: 431-440.
57. Kansanen, P. H., J. Venetvaara. 1991. Comparison of biological collectors or airborne heavy metals near ferrochrome and steel works. Water Air Soil Pollut., 60: 337-359.
58. Kirchhoff, M. and H. Rudolph. 1989. A sandwich technique for the continuous monitoring of air pollutants with the bryophyte Sphagnum. J. Hattori Bot. Lab., 67: 423-431.
59. Král, R., L. Kryzová, and J. Liska. 1989. Background concentrations of lead and cadmium in the lichen Hypogymnia physodes at different altitudes. Sci Total Environ., 84: 201-209.
60. Kuik, P and H. Th. Wolterbeek. 1995. Factor analysis of atmospheric trace-element deposition data in the Netherlands obtained by moss monitoring. Water Air Soil Pollut., 84: 323-346.
61. Kytömaa, A., S. Nieminen P. Thuneberg H. Haapala and P. Nuorteva. 1995. Accumulation of aluminium in Hypogymnia physodes in the surroundings of a finnish sulphite-cellulose factory. Water Air Soil Pollut., 81: 401-409.
62. Larsen, B. R., H. Løkke, and L. Rasmussen. 1985. Accumulation of chlorinated hydrocarbons in moss from artificial rainwater. Oikos, 44: 423-429.
63. Leharne, S., E. Mcphee, and L Kingston. 1990. The pattern of metal deposition to a woodland ecosystem as revealed by bryophyte analysis. Environ. Monit. Assess. 15: 131-142.
64. Lodenius, M. 1981. Regional distribution of mercury in Hypogymnia physodes in Finland. Ambio, 10: 183-184.
65. Markert, B. and V. Weckert. 1989. Fluctuation of element concentrations during the growing season of Polytrichum formusun (Hedw.). Water Air Soil Pollut., 43: 177-189.
66. Martin, M. H. and P. J Coughtrey. 1982. Biological monitoring of heavy metal pollution. Land and Air. Applied Science Publishers. London. 475 pp.
67. Morosini, M., J. Schreltmüller, U. Reuter, K. Ballschmiter. 1993 Correlation between C-6 C-14 chlorinated hydrocarbons levels in the vegetation and in the boundary layer of the troposphere. Environ. Sci Technol., 27: 1517-1523.
68. Mueller, C. S., R. L. Thompson, G. J Ramelow, J. N. Beck, M. P. Langley, J. C. Young and D. M Casserly. 1987. Distribution of AI, V. and Mn in lichens across Calcasieu Parish, Louisiana. Water Air Soil Pollut., 33: 155-164
69. Muir, D. C. G., M D. Segstro, P. M Welbourn, D. Toom, S. J Eisenreich. C R. Macdonald and D. M. Whelpdale. 1993. Patterns of accumulation of airborne organochlorine contaminants in lichens from the upper Great Lakes region of Ontario. Environ Sci. Technol., 27: 1201-1210
70. Nieboer, E., D. H. S. Richardson, and F. D. Tomassini. 1978. Mineral uptake and release by lichens: An overview. Bryologist, 81: 226-246
71. Nieboer, E. and D. H. S. Richardson. 1981, Lichens as monitors of atmospheric deposition. In Atmospheric pollutants in natural waters. S.J. Eisenreich (ed.). Ann Arbor Science, Ann Arbor. Chap. 17. pp. 339-388.
72. Nieboer, E., D. H. S. Richardson, L. J. R. Boileau, P. J. Beckett, P. Lavoie and P. Padovan. 1982. Lichens and mosses as monitors of industrial activity associated with uranium mining in northern Ontario, Canada-Part 3: Accumulations of iron and titanium and their mutual dependence. Environ. Pollut. Ser. B., 4: 181-192.
73. Nimis, L., M. Castello and M. Perotti, 1993. Lichens as bioindicators of heavy metal pollution: A case study at la Spezia (N Italy). In Plants as Biomonitors. Indicators for heavv metals in the terrestrial environments. B. Merkert (ed.). VCH, Weinheim, Chap. 10. pp. 265-284.
74. Nriagu, J. O. and W. A. Glooschenko. 1992. Isotopic composition of sulphur in mosses across Canada. Environ. Sci. Technol., 26: 85-89.
75. Olmez, I., M. Cetin Gulovali and G. E. Gordon. 1985. Trace element concentrations in lichens near a coal-fired power plant. Atmos. Environ., 19: 1663-1669.
76. Pakarinen, P., M. Kaistila and E. Häsänen. 1983. Regional concentration levels of vanadium, aluminium and bromine in mosses and lichens. Chemosphere, 12: 1477-1485.
77. Perkins, D. F., R. O. Millar and P. E. Neep. 1980. Accumulation of airborne fluoride by lichens in the vicinity of an aluminium reduction plant. Environ. Pollut. Ser. A., 21: 155-168.
78. Pickering, D. C. and L Puia. 1969. Mechanism for the uptake of zinc by Fontinalis antipyretica, Physiol. Plant., 22: 653-661
79. Pilegaard, K. 1979. Heavy metals in bulk precipitation and transplanted Hypogymnia physodes and Dicranowetsia cirrata in the vicinity of a dannish steelworks. Water Air Soil Pollut., 11: 77-91.
80. Pilegaard, K. 1987. Changes in heavy metal deposition around the lead-zinc mine in Maarmorilik. Greenland, during the year 1979-1985. In International conference on heavy metals in the environment, New Orleans, Sept. 1987. Symposium Proceedings. Vol. I. S. E. Lindberg and T. C. Hutchinson (eds.). CEP Consultants Ltd, Edinburgh, pp. 275-277.
81. Pilegaard, K. 1993. Biological monitoring of particulate pollutants during exploration work at a niobium mineralization in Greenland. Environ. Monit. Assess., 27: 221-232.
82. Pilegaard, K., L. Rasmussen and H. Gydesen. 1979. Atmospheric background deposition of heavy metals in Denmark monitored by epiphytic cryptogams. J. Appl. Ecol. 16: 843-853.
83. Proctor, M. C. F. 1981. Physiological ecology of Bryophytes. In Advances in Bryology, Vol. I. W. Schultze-Motel (ed.). pp. 80-131.
84. Puckett, K. J. 1985. Temporal variation in lichen element levels. In Lichen physiology and cell biology. D.H. Brown (ed.). Plenum Press. New-York. pp. 211-225.
85. Rao, D. N., G. Robitaille and F. Leblanc. 1977. Influence of heavy metal pollution on lichens and bryophytes. J. Hattori Bot. Lab., 42: 213-239.
86. Ratcliffe, J. M. 1975. An evaluation of the use of biological indicators in an atmospheric lead survey. Atmos. Environ., 9: 623-629.
87. Richardson, D. H. S., S. Kiang, V. Ahmadjian and E. Nieboer. 1985. Lead and uranium uptake by lichens. In Lichen physiology and cell biology. D. H. Brown (ed.). Plenum Press. New-York. pp. 227-246.
88. Ross, H. B 1990 On the use of mosses (Hylocomium splendens and Pleurozium schreberi) for estimating atmospheric trace metal deposition. Water Air Soil Pollutt., 50: 63-76.
89. Rühling, A. and G. Tyler. 1968. An ecological approach to the lead problem. Bot. Notiser, 121: 321-342.
90. Rühling, A. and G. Tyler. 1970. Sorption and retention of heavy metals in the woodland moss Hylocomtum splendens (Hedw.) Br. et Sch. Oikos, 21 92-97.
91. Ruhling, Å. and G. Tyler 1984 Recent changes in the deposition of heavy metals in northern Europe. Water Air Soil Pollut., 22: 173-180.
92. Santelmann, M. V and E. Gorham. 1988. The influence of airborne road dust on the chemistry of Sphagnum mosses J Ecol. 76: 1219-1231
93. Schaug, J., J. P. Rambæk, E. Steinnes and R. C. Henry. 1990. Multivariate analysis of trace element data from moss samples used to monitor atmospheric deposition. Atmos. Environ., 24A: 2625-2631
94. Schwartzman, D., M. Kasim L. Stieff and J. H. Johnson Jr. 1987. Quantitative monitoring of airborne lead pollution by a foliose lichen. Water Air Soil Pollut., 32: 363-378.
95. Seaward, M. R. D. 1995. Use and abuse of heavy metal bioassays in environmental monitoring. Sci. Total Environ., 176: 129-134.
96. Sloof, J. E. and H. Th. Wolterbeek. 1991a. National trace-element air pollution monitoring survey using epiphitic lichens. Lichenologist., 23: 139-165
97. Sloof, J. E. and H. Th. Wolterbeek. 1991b. Patterns in trace elements in lichens. Water Air Soil Pollut., 58: 785-795.
98. Steinnes, E. 1989. Biomonitors of air pollution by heavy metals. In Control and fate of atmospheric trace metals. J. M. Pacyna and B. Ottar (eds). NATO ASI Series 268, Kluwer Academic Publishers, Dordrecht, pp. 321-328.
99. Steinnes, E. 1993. Some aspects of biomonitoring of air pollutants using mosses, as illustrated by the 1976 norwegian survey. In Plants as Biomonitors. Indicators for heavy metals in the terrestrial environments B. Merkert (ed.). VCH, Weinheim, Chap. 15. pp. 381-394.
100. Steinnes, E. 1995. A critical evaluation of the use of naturally growing moss to monitor the deposition of atmospheric metals. Sci. Total Environ., 160/161; 243-249.
101. Steinnes, E. and H. Krog. 1977. Mercury, arsenic and selenium fall-out from an industrial complex studied by means of lichen transplants. Oikos, 28: 160-164.
102. Steinnes, E., J. P. Rambæk and I.E. Hanssen 1992. Large scale multi-element survey of atmospheric deposition using naturally growing moss as biomonitor. Chemosphere., 25: 735-752.
103. Steinnes, E., J. E. Hanssen, J. P. Rambæk and N. B. Vogt. 1994. Atmospheric deposition of trace elements in Norway: Temporal and spatial trends studied by moss analysis. Water Air Soil Pollut., 74: 121-140.
104. Streit, B. and W. Stumm. 1993. Chemical properties of metals and the process of bioaccumulation in terrestrial plants. In Plants as Biomonitors. Indicators for heavy metals in the terrestrial environments. B. Merkert (ed.). VCH. Weinheim. Chap. 2. pp. 31-62.
105. Takala, K., H. Olkkonen and R. Salminen. 1994. Iron content and its relations to the sulphur and titanium contents of epiphytic and terricolous lichens and pine bark in Finland. Environ. Pollut., 84: 131-138.
106. Thomas, W. 1984. Statistical models for the accumulation of PAH. chlorinated hydrocarbons and trace metals in epiphytic Hypnum cupressiforme. Water Air Soil Pollut., 22: 351-371.
107. Thomas, W, 1986. Representativity of mosses as biomonitor organisms for the accumulation of environmental chemicals in plants and soils. Ecotoxicol. Environ. Saf., 11: 339-346.
108. Thomas, W., A. Rühling and H. Simon. 1984. Accumulation of airborne pollutants (PAH, chlorinated hydrocarbons, heavy metals) in various plants species and humus. Environ. Pollut. Ser. A., 36: 295-310
109. Thompson, R. L., G. J. Ramelow J. N. Beck M. P. Langley J. C. Young and D. M. Casserly. 1987. A study of airborne metals in Calcasieu Parish, Louisiana using the lichens Parmelia praesorediosa and Ramalina stenospora Water Air Soil Pollut., 36: 295-309.
110. Tyler, G. 1989. Uptake, retention and toxicity of heavy metals in lichens. Water Air Soil Pollut., 47: 321-333.
111. Tyler, G. 1990. Bryophytes and heavy metals: a literature review . Bot. J. Linn. Soc. 104: 231-253.
112. Vestergaard, N K., U. Stephansen and L. Rasmussen. 1986. Airborne heavy metal pollution in the environment of a danish steel plant. Water Air Soil Pollut., 27: 363-377.
113. Villeuneuve, J. -P , E. Fogelqvist and C. Cattini. 1988 Lichens as bioindicators for atmospheric pollution by chlorinated hydrocarbons. Chemosphere, 17: 399-403.
114. Walther, D. A., G. J. Ramelow, J. N. Beck, J. C. Young, J. D Callahan and M. F. Marcon. 1990a. Distribution of airborne heavy metals as measured in the lichens Ramalina stenospora and Parmotrema praesorediosum in Baton Rouge, Louisiana. Water Air Soil Pollut., 50: 279-292.
115. Walther, D. A., G J. Ramelow, J. N. Beck, J C. Young, J. D. Callahan and M. F Marcon. 1990b. Temporal changes in metal levels of the lichens Parmotrema praesorediosum and Ramalina stenospora, southwest Louisiana. Water Air Soil Pollut , 53: 189-200.
116. Wegener, J. W. M., M. J. M, van Schaik and H. Aiking. 1992. Active biomonitoring of polycyclic aromatic hydrocarbons by means of mosses. Environ. Pollut. 76: 15-18.
117. Wells, J. M. and D. H. Brown. 1987. Factors affecting the kinetics of intra- and extracellular cadmium uptake by the moss Rhytidiadelphus squarrosus. New Phytol., 105: 123-137.
118. Wells, J. M. and D. H. Brown. 1990. Ionic control of intracellular and extracellular Cd uptake by the moss Rhytidiadelphus squarrosus (Hedw.) Warnst. New Phytol., 116: 541-553.
119. Wiersma, G. B., M. E. Harmon and S E. Greene. 1987. Elemental composition of Hyloconium splendens Hoh rainforest Olympic national park Washington, USA. Chemosphere, 16: 2631-2645.
120. Wittig, R. 1993. General aspects of biomonitoring heavy metals by plants. In Plants as Biomonitors. Indicators for heavy metals in the terrestrial environments. B. Merkert (ed.). VCH, Weinheim. Chap. 1. pp. 3-27.
121. Wolterbeek, H. Th. and P. Bode. 1995. Strategies in sampling and sample handling in the context of large-scale plant biomonitoring surveys of trace element air pollution. Sci. Total Environ., 176: 33-43.
122. Yule, F. A. and O. L. Lloyd. 1984. Metal content of an indigenous moss in Armadale, central Scotland. Water Air Soil Pollut., 21: 261-270.
123. Zakshek, E. M., K. J. Puckett and K. E. Percy. 1986, Lichen sulphur and lead levels in relation to deposition patterns in eastern Canada, Water Air Soil Pollut., 30: 161-169.
124. Zechmeister, H. G. 1995. Correlation between altitude and heavy metal deposition in the Alps. Environ. Pollut., 89: 73-80.