Presidential Address

BURNS, C. W.: Towards tomorrow: taking SIL into the 21st century 1

Baldi Lecture

GOLDMAN, C. R.: Four decades of change in two subalpine lakes 7

Peter Kilham Memorial Lecture

LIVINGSTONE, D. A.: Historical geochemistry of tropical Africa 27

Plenary lectures

BOON, P. I.: Carbon cycling in Australian wetlands: the importance of
methane 37

BOULTON, A. J.: The functional role of the hyporheos 51

GARDNER, W. S., LAVRENTYEV, P. J., BOOTSMA, H. A., CAVALETTO, J. F.,
TRONCONE, F. & COTNER, J. B.: Effects of natural light on nitrogen
dynamics in diverse aquatic environments 64

MAGNUSON, J. J. & KRATZ, T. K.: Lakes in the landscape: approaches to
regional limnology 74

Moss, B.: Conservation - of freshwaters or of the status quo? 88

O'GRADY, M. F. & DUFF, D.: Rehabilitation ecology of rivers and lakes 97

REYNOLDS, C. S.: Defining sustainability in aquatic ecosystems: a
thermodynamic approach 107

Freshwater biodiversity

MALMQUIST, H. J., ANTONSSON, T., GUDBERGSSON, G., SKULASON, S. &
SNORRASON, S. S.: Biodiversity of macroinvertebrates on rocky
substrate in the surf zone of Icelandic lakes 121

MORIARTY, C. & FITZMAURICE, P.: Origin and diversity of freshwater
fishes in Ireland 128

PADISAK, J., PETERFI, L. S. & MOMEU, L.: Silica-scaled chrysophytes
from Hungary 131

PRAT, N., MUNNE, A., RIERADEVALL, M., CARCELLER, F., FONS, J., CHACON,
G., IBANEZ, J., FONT, X., CARMONA, J. M. & ROMO, A.: Biodiversity of a
Mediterranean stream drainage network 135

RICHARDSON, J. L.: Diatoms from lakes and marshes of the Atherton
Tableland, Australia 140

WILLIAMS, W. D.: Biodiversity in temporary wetlands of dryland regions
141

Phytoplankton general

BOZELLI, R. L. & GARRIDO, V.: Gradient of inorganic turbidity and
responses of planktonic communities in an Amazonian lake, Brazil 147

GRIGORSZKY, I., NAGY, S., KRIENITZ, L., KISS, K. T., HAMVAS, M. M.,
TOTH, A., BORICS, G., MATHE, C., KISS, B., BORBELY, G., DEVAI, G. &
PADISAK, J.: Seasonal succession of phytoplankton in a small
oligotrophic oxbow and some consideration to the PEG model 152

HUOVINEN, P. S. & GOLDMAN, C. R.: Inhibition of phytoplankton
production by UV-B radiation in clear subalpine Lake Tahoe,
California-Nevada 157

WALKER, R. F., TSUJIMURA, S. & KUMAGAI, M.: Automated monitoring of
six cyanobacterial taxa from Lake Biwa by image processing 161

Aquatic birds

D'AMICO, F., MANEL, S., MOUCHES, C. & ORMEROD, S. J.: River birds in
regulated rivers: cost or benefit? 167

KEREKES, J. J., KNOECHEL, R., RYAN, P. M. & STROUD, G.: Common Loon
breeding success in oligotrophic lakes in Newfoundland, Canada 171

MANEL, S., BUCKTON, S. T. & ORMEROD, S. J.: Effect of habitat
structure on the distribution of Himalayan river birds 175

PASZKOWSKI, C. A. & TONN, W. M.: Effects of lake size, environment,
and fish assemblage on species richness of aquatic birds 178

Applied limnology in fish culture

BYRNE, C., POOLE, R. & McGINNITY, P.: Food consumed by wild and
stocked brown trout, Salmo trutta L., and salmon, Salmo salar L., in
an Irish lake 185

DEMPSEY, S., COSTELLO, M. J., QUIGLEY, D., WARRER-HANSEN, I., BRIODY,
M., THOMPSON, E. & GILLOOLY, M.: Freshwater salmon and trout farm
characteristics and production in Ireland 189

HELMINEN, H., KARJALAINEN, J., KURKILAHTI, M., RASK, M. & SARVALA, J.:
Eutrophication and fish biodiversity in Finnish lakes 194

MILSTEIN, A., KRAMBECK, H. J. & ZORAN, M.: Stratification interference
practice and modelling as a management tool in fish culture reservoirs 200

NAGY, S., DEVAI, G., GRIGORSZKY, I., KISS, B. & TOTH, A.:
Characteristic features of tropical fry culture, from the point of view
of applied limnology 206

Periphyton and epiphytes

BAFFICO, G. D.: Periphyton community of Nahuel Huapi lake (Patagonia,
Argentina) related to environmental factors 211

GAFNY, S. & GASITH, A.: Spatial distribution and temporal dynamics of
the epilithic community in the littoral zone of Lake Kinneret, Israel 216

IZAGUIRRE, I. & PIZARRO, H.: Ecology and taxonomy of the epilithic
algal community from a stream in Cierva Point (Antarctic Peninsula) 223

Physical limnology

CASAMITJANA, X., COLOMER, J. & FERNANDO, H. J. S.: Development of a
turbid layer in conical basins and its application to Lake Banyoles 233

EVEN, S., MOUCHEL, J.-M., SERVAIS, P., LE HIR, P., THOUVENIN, B.,
POULIN, M. & GARNIER, J.: Suspended matter and ecological behaviour of
rivers and estuaries. Conceptual and numerical modelling 238

KOZERSKI, H.-P. & LEUSCHNER, K.: A new plate sediment trap: design and
first experiences 242

MACINTYRE, S. & ROMERO, J. R.: Predicting upwelling, boundary mixing,
and nutrient fluxes in lakes 246

SCHIMMELE, M. & HERZSPRUNG, P.: Limnology of sulfur-acidic lignite
mining lakos. I. Physical properties: Influence of dissolved
substances on electrical conductivity and density 251

SERRA, T., PIERA, J., CATALAN, J., COLOMER, J., ROGET, E. &
CASAMITJANA, X.: Particle and turbulence measurements in lakes:
application to the rising plume of Lake Banyoles 256

WATANABE, M., HORIUCHI, S. & AMBE, Y.: Sudden changes of thermal
stratification in a meromictic lake, Lake Kaiike, Japan 261

August Thienemann, Chironomidae and applied limnology

ASHE, P., MCCARTHY, T. K. & FAHY, S.: The supposed arctic relict
Corynocera ambigua Zetterstedt in Ireland (Diptera: Chironomidae),
with a review of its ecology and distribution 267

BUTLER, M. G., REZANKA, R. L. & GIOVANNIELLI, K. M.: Utility of
species-level identification of Chironomus larvae in biological
assessment of prairie lakes 273

CRANSTON, P.: August Thienemann's influence on modern chironomidology
- an Australian perspective 278

IWAKUMA, T., YASUNO, M., HAYASHT, H. & HANAZATO, T.: Factors
controlling the population dynamics of chironomids in a eutrophic
Japanese lake: experimental analysis using mesocosms 284

SIETHER, O. A.: Zoogeographical patterns in Chironomidae (Diptera) 290

WRIGHT, I. & CRANSTON, P.: Are Australian lakes different? -
Chironomid and chaoborid exuviae from Lake McKenzie, a coastal
temperate dune lake 303

Regionalisation in inland waters

APPELBERG, M., BERGQUIST, B. C. & DEGERMAN, E.: Using fish to assess
environmental disturbance of Swedish lakes and streams - a preliminary
approach 311

BLOM, T., KORHOLA, A., WECKSTRÖM, J., LAING, T., SNYDER, J.,
MACDONALD, G. & SMOL, J.: Physical and chemical characterisation of
small subarctic headwater lakes in Finnish Lapland and the Kola
Peninsula 316

GEORGE, D. G: De-coupling natural and anthropogenic sources of
variation in the lakes of the English Lake District 321

GOEDKOOP, W., JOHNSON, R. & SPANBERG, E.: The importance of sampling
effort for the assessment of ecological quality using
macroinvertebrates 326

JOHNSON, R. K. & GOEDKOOP, W: The use of biogeographical regions for
partitioning variance of littoral macroinvertebrate communities 333

JONSSON, G. S., JONSSON, I. R., BJÖRNSSON, M. & EINARSSON, S. M.:
Using regionalization in mapping the distribution of the diatom
species Didymosphenia geminata (Lyngb.) M. Smith in Icelandic rivers 340

LANDERS, D. H., HAGGERTY, P. K., CLINE, S., CARSON, W. & FAURE, F.:
The role of regionalization in large river restoration 344

LAPERRIERE, J. D.: Lake types of central Arctic Alaska 352

LYNCH, K. D. & TAYLOR, W. W.: Interjurisdictional cooperation and the
management of Laurentian Great Lakes ecosystems 353

MALMQUIST, B. & HOFFSTEN, P.-O.: Predictors of benthic
macroinvertebrate species richness and community structure in Central
Swedish streams 357

MANNIO, J., RÄIKE, A. & VUORENMAA, J.: Finnish lake survey 1995:
regional characteristics of lake chemistry 362

MARION, L. & BRIENT, L.: Effect of wetlands on water quality of
rivers: the case of the important natural French plain lake,
Grand-Lieu 368

ORTEGA, M., CASAS, J. J., AGUILERA, P. A. & CASTRO, H.: Hydrochemical
characterization of wetlands in a semi-arid region of eastern
Andalucia (Almeria, Spain): a preliminary study 372

RIJKEBOER, M., DEKKER, A. G. & GONS, H. J.: Optical classification of
Dutch inland waters 378

SANDIN, L. & JOHNSON, R. K.: Spatial scale of benthic macroinvertebrate
communities in Swedish streams: variation partitioning using partial
Canonical Correspondence Analysis 382

VUORENMAA, J., KLEEMOLA, S. & FORSIUS, M.: Trend assessment of
deposition runoff water fluxes and water chemistry at European ICP
Integrated Monitoring sites 384

Groundwater/surface water interactions

BORCHARDT, D. & FISCHER, J.: Three-dimensional patterns and processes
in the River Lahn (Germany): variability of abiotic and biotic
conditions 393

CLARET, C., MARMONIER, P. & GIBERT, J.: Efficiency of organic matter
transformations in the hyporheic zone. Impact of river regulation 398

DOKULIL, M. T. & SCHIEL, G.: The sediment-water interface as an
ecotone: an example from an oxbow lake of the River Danube 402

DUFF, J. H., TONER, B., JACKMAN, A. P., AVANZTNO, R. J. & TRISKA,
F. J.: Determination of groundwater discharge into a sand and gravel
bottom river: a comparison of chloride dilution and seepage meter
techniques 406

FURCH, K.: Evaluation of groundwater input as major source of solutes
in an Amazon floodplain lake during the low water period 412

KRINGEL, R., NITSCHE, C. & HAFERKORN, B.: Limnology of sulfur-acidic
lignite mining lakes III: approach and limitation in predicting
chemical properties 416

LA BAUGH, J. W., WINTER, T. C. & ROSENBERRY, D. O.: Comparison of the
variability in fluxes of ground water and solutes in lakes and
wetlands in central North America 420

LENK, M. & SAENGER, N.: Exchange processes in the river bed and their
influence on temperature variations 427

MALARD, F., WARD, J. V. & ROBINSON, C. T.: An expanded perspective of
the hyporheic zone 431

MARMONIER, P., CLARET, C. & DOLE-OLIVIER, M.-J.: Interstitial
communities of artificial drainage canals 438

MARIF, E., FISHER, S. G., SCHADE, J. D., WELTER, J. R. & GRIMM, N. B.:
Hydrological and chemical linkages between the active channel and the
riparian zone in an arid land stream 442

MAUCLAIRE, L. & GIBERT, J.: Spatial heterogeneity of bacterial
abundance and activity and fauna composition in alluvial aquifers 448

MINDL, B., GRIEBLER, C., WIRTH, N. & STARRY, O.: Biodegradability of
DOC and metabolic response of heterotrophic bacteria in groundwater 453

SAENGER, N. & LENK, M.: Hydraulic head and tracer experiments - two
techniques to examine the hydraulic exchange through a riffle 460

TRISKA, F. J., JACKMAN, A. P., DUFF, J. H. & AVANZINO, R. J.:
Subchannel flow velocity and dispersion beneath a relict beaver dam,
Shingobee River, Minnesota, USA: implications for nutrient cycling 463

WEBSTER, I. T., MAIER, H., BAKER, P. & BURCH, M.: The influence of
wind on lagoon-river exchange in the River Murray, Australia 468

WEIGELHOFER, G. & WARINGER, J.: The role of fine particles in the
exchange between surface and hyporheic zone in a forested sandstone
stream (Weidlingbach, Austria) 472

Mountain lake ecology

AUGUSTI-PANAREDA, A., THOMPSON, R. & LIVINGSTONE, D. M.: Reconstructing
temperature variations at high elevation lake sites in Europe during
the instrumental period 479

FIELLHEIM, A., BOGGERO, A., HALVORSEN, G. A., NOCENTINI, A. M.,
RTERADEVALL, M., RADDUM, G. G. & SCHNELL, 0. A.: Distribution of
benthic invertebrates in relation to environmental factors. A study of
European remote alpine lake ecosystems 484

KLEIVEN, S. & LANDE, A.: Effects of liming in mountain lakes 489

McNAUGHT, A. S., PAVLIK, D. & SCHINDLER, D. W.: Patterns of
zooplankton biodiversity in the mountain lakes of Banff National Park,
Canada 494

RIERADEVALL, M., BONADA, N. & PRAT, N.: Recent and past zoobenthic
communities in the high mountain Lake Redo (Pyrenees, Spain). A MOLAR
project study 5OO

SOLTMINI, A. G., RUGGIERO, A., ANELLO, M., MUTSCHLECHNER, A. &
CARCHINI, G.: The benthic community structure in mountain ponds
affected by livestock watering in nature reserves of Central Italy 501

SOMMARUGA-WÖGRATH, S., PSENNER, R. & SOMMARUGA, R.: DOC and
chlorophyll-a concentrations in high-mountain lakes of the Austrian
Alps: potential effects of climatic warming 506

SORVARI, S., RAUTIO, M. & KORHOLA, A.: Seasonal dynamics of the
subarctic Lake Saanajärvi in Finnish Lapland 507

STRASKRABOVA, V., SIMEK, K., MACEK, M., HARTMAN, P., FOTT, J. & BLAZO,
M.: Pelagic food webs and microbial loop in low-alkalinity mountain
lakes 513

THIES, H., NICKUS, U., ARNOLD, C., SCHNEGG, R., WILLE, A. & PSENNER,
R.: Biogeochemistry of a high mountain lake in the Austrian Alps 517

TOLOTTI, M. & CANTONATI, M.: Temporal and vertical variations of
chlorophyll concentrations in high mountain lakes of the
Adamello-Brenta Regional Park (Trentino, Italy) 521

VILLAR-ARGAIZ, M., MEDINA SANCHEZ, J. M., CRUZ-PIZARRO, L. & CARRILLO,
P.: Life history implications of calanoid Mixodiaptomus laciniatus in
C:N:P stoichiometry 527

WILLE, A., SATTLER, B. & PSENNER, R.: Lake ice microbial communities
(LIMCO)-biology of a periodic ecotone 532

ZAGARESE, H. E., DIAZ, M., PEDROZO, F. & UBEDA, C.: Mountain lakes in
northwestern Patagonia 533

Biomanipulation

DECLERCK, S., DE MEESTER, L., DE SMEDT, P., ROMMENS, W., VYVERMAN, W.,
GEENENS, V., VAN WICHELEN, J., DEGANS, H. & DECLEER, K.: Clear water
and charophytes in a hypertrophic pond 541

DRENNER, R., BACA, R., ERNST, M., JENSEN, D. & MARSHALL, D.:
Experimental biomanipulation of a water supply reservoir by stocking
piscivorous largemouth bass 542

GONZALEZ, E. J.: Nutrient enrichment and zooplankton effects on the
phytoplankton community in microcosms from El Andino reservoir
(Venezuela) 543

LAUDE, U., ANWAND, K., KASPRZAK, P., MEHNER, T. & KOSCHEL, R.: Does
competition between roach (Rutilus rutilus (L.)) and perch (Percra
fluviatilis (L.)) at juvenile zooplanktivorous stages limit adalt
perch biomass in the biomanipulated Feldbherger Haussee
(Mecklenburg-Vorpommern, Germany)? 544

REINERTSEN, H., OLSEN, Y. & VADSTEIN, O.: Effects of biomanipulation
on planktonic communities in Norwegian lakes 548

VOIGT, H. & BENNDORF, J.: Differences in plasticity of adult and
juvenile daphnids in changing the morphology of their filtercombs 549

Ecological effects of cyanabLacterial toxins

ABOAL, M., PUIG, M. A., IOS, H. & LOPEZ-JIMENEZ, E.: Relationship
between macroinvertebrate diversity and toxicity of Cyanophyceae
(Cyanobacteria) in some streams from Eastern Spain 555

WILLEN, E., AHLGREN, G. & SÖDERHIELM, A.-C.: Toxic cyanophytes in
three Swedish lakes 560

Restoration ecology: small water bodies and wetlands

BOLIER, G. & CLAASSEN, T. H. L.: Limiting nutrients for algal growth
before and after lake restoration in a Frisian wetland area (The
Netherlands) 567

BUERGI, H. R. & STADELMANN, P.: Change of phytoplankton diversity
during long-term restoration of Lake Baldegg (Switzerland) 574

BUSSE, L. & GUNKEL, G.: Limnological parameters of flooded alder fens
with respect to the restoration of small running waters 582

CLAASSEN, T. H. L.: Restoration of small water bodies by introducing
aquatic plants 586

PEDERSEN, M. L., HOFFMANN, C. C. & SVENDSEN, L. M.: Headwater
restoration of the river Gudena-1.-Implications for nitrate transport 593

STEPHEN, D., CARVALHO, L., BEKLIOGLU, M., WILLIAMS, A. E. & Moss, B.:
Long-term responses of a shallow and a deep lake to external nutrient
reduction 598

Carbon and nutrient cycling in lowland rivers

GRIMM, N. B., MARIF, E. & TANK, J. L.: Nitrogen cycling in a dryland
stream ecosystem as determined by a 15N tracer experiment (LINX) 601

HOFFMANN, C. C., PEDERSEN, M. & LAUUSET, A.: Headwater restoration of
the river Gudena - 2. Implications for nutrients in riparian areas 602

KERN, J., DARWICH, A. & FÖRSTEL, H.: Studies on the role of N2
fixation in the floodplain forest in the Central Amazon 610

KÖHLER, J.: A preliminary carbon budget of the plankton-dominated
lowland river Spree (Germany) 615

LAFFA1LLE, P., FEUNTEUN, E., Acou, A. & LEFEUVRE, J. C.: Role of
European eel (Anguilla anguilla L.) in the transfer of organic matter
between marine and freshwater systems 616

Wetlands for water treatment

CLEMENTS, N. J., WOOD, R. B. & MCATAMNEY, C. F.: Ammonia removal from
landfill leachate using constructed wetlands 623

O'SULLIVAN, A. D., MURRAY, D.A. & OTTE, M. L.: Constructed wetrlandse
for treatment of mine tailings at Tara Mines, Ireland 627

RENMAN, G. & KIETLINSKA, A.:A compact constructed wetland for
treatment of landfill leachate 629

SHACKLE, V., FREEMAN, C. & REYNOLDS, B.: Biogeochemistry of water
quality amelioration using wetlands - a role for enzymes 633

STIBE, L., FLEISCHER, S. & ROSENQVIST, T.: Removal of heavy metals in
three consecutive stormwater treatment ponds/wetlands 637