Preface
M. Munawar, O. Hänninen, S. Roy, N. Munawar, L. Kärenlampi, D. Brown

Opening Address

Bioindicators in international environmental cooperation: A users view
H. Sisula

Foreword
J. Salanki


Section One: Biological Indicators

Detection of polycyclic aromatic hydrocarbon metabolites in aquatic organisms
D. Warshawsky, J. Schneider, R. Reilman, K. LaDow, M. Radike, T. Cody, R. Grosser & R. Vestal

Utility and applicability of autotrophic picoplankton as bioindicators of ecosystem health
M. Munawar, L.F. Munawar & T. Weisse

Physiological and biochemical assessment of environmental stress in bryophytes and lichens
D.H. Brown

Macrophyte enzymes as indicators of aquatic pollution.
S. Roy & O. Hänninen

The use of watermelon as an ozone bioindicator
B.S. Gimeno, J.M. Salleras, J.L. Porcuna, R.A. Reinert, D. Velissariou & A.W. Davison

The use of Aleppo pine, Pinus halepensis Mill as a bioindicator of ozone stress in Greece and Spain
A.W. Davison, D. Velissariou, J.D. Barnes, B. Gimeno, & R. Inclan

Microscopic structure of conifer needles as a diagnostic tool in the field
S. Sutinen & L. Kolvisto

Arboreal insects as indicators of air pollution effects on woody plants
J.K. Holopainen & J. Oksanen

Biphasic and combined effects of heavy metals on the periodic valve movements of the freshwater bivalve, Anodonta cygnea
J. Salánki

Cytochrome P450, monooxygenases, reactive oxygen species, lipid peroxidation, and glutathione in wild catch carp and trout liver - influence of a three week cleaning period to obtain reference data for biomonitoring evaluation
W. Klinger, A. Barth, R. Glöckner, E. Karge, M. Kretzschmar, D. Müller & F. Schiller


Section Two: Global Overview

Atmospheric heavy metal deposition in Europe estimated by moss analysis
A. Rühling

Biological monitoring in Latvia using moss and soil: Problems in the partitioning of anthropogenic and natural effects
G. Brumelis & O. Nikodemus

Biomonitoring in urban Slovakia by the accumulation of proline and inorganic elements in tree leaves
J. Supuka