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Congress in Barcelona 1992

Ed.: A. Sládecková

1983. VIII, 673 pages, 17x24cm, 1350 g
Language: English

(Verhandlungen IVL, Volume 25 Part 1)

ISBN 978-3-510-54040-2, paperback, price: 202.00 €

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Contents

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Presidential Address
JONASSON, P. M.: Continental rifting - energy pathways of two
contrasting rift lakes 1
Edgardo Baldi Memorial Lecture
BENKE, A. C.: Concepts and patterns of invertebrate production in
running waters 15
Peter Kilham Memorial Lecture
HECKY, R. E.: The eutrophication of Lake Victoria 39
Plenary Lecture
EDMONDSON, W. T.: Eulogy for G. Evelyn Hutchinson (1903 - 1991) 49
1. Physical Limnology
STEWART, K. M.: Waves in some Madison lakes 56

MOLL, R., JOHENGEN, T., BRATKOVICH, A., SAYLOR, J., MEADOWS, G.,
MEADOWS, L. & PERNIE, G.: Vernal thermal fronts in large lakes: A case
study from Lake Michigan 65
PEETERS, F., WUEST, A. & IMBODEN, D. M.: Comparison of the results of
tracer experiments in lakes with predictions based on horizontal
mixing models 69
LIVINGSTONE, D. M.: Temporal structure in the deep-water temperature
of four Swiss lakes: A short-term climatic change indicator? 75
GLOOR, M., WUEST, A. & MUNNICH, M.: Benthic boundary mixing and
resuspension induced by internal seiches (Abstract) 82
COBELAS, M. A., BALTANAS, A., VELASCO, J. L., VALLADoLlD, M.,
IZQUIERDO, M. & MARTIN, E.: Slow overturn in a gravel-pit lake 83
COLOMER, J. & CASAMITJANA, X.: A model to calculate surface energy
fluxes from routine meteorological data. Application to Lake Banyoles 88
ROGET, E., SALVADE, G., ZAMBONI, F. & LLEBOT, J. E.: Internal waves in
a small lake with a thick metalimmon 91
VILA, X. & ABELLA, C. A.: Comparison of light spectral distribution in
some waterbodies of Banyoles area (Girona, Spain) 100
BARONE, R., CALVO, S., NASELLI FLORES, L. & VIVIANI, G.: Thermal
analysis of a Sicilian dam reservoir 105
TSUDA, R. & KUMAGAI, M.: Changes of suspended particles during the
short period in the south basin of
Lake Biwa 111
COGELS, F.-X. & GAC, J. Y.: Evaporation and annual evolution of
chloride concentrations in the water of a shallow Sahelian lake: Lake
of Guiers (Senegal) 115
CASAMITJANA, X. & SCHLADOW, G.: A one-dimensional model for vertical
distribution of particles in a stratified lake 119
II. Chemical Limnology
WETZEL, R. G.: Humic compounds from wetlands: Complexation,
inactivation, and reactivation of surface-bound and extracellular
enzymes 122
KIM, B. & WETZEL, R. G.: The effect of dissolved humic substances on
the alkaline phosphatase and the growth of microalgae 129
HONGVE, D.: Total and reactive aluminium concentrations in non-turbid
Norwegian surface waters 133
PETTERSSON, K., BELL, R., ISTVANOVICS, V., PADISAK, J. & PIERSON, D.:
Phosphorus status of size-fractionated seston in Lake Erken 137
AHLGREN, G.: Seasonal variation of fatty acid content in natural
phytoplankton in two eutrophic lakes. A factor controlling zooplankton
species? 144
RIISE, G., SALsu, B. & BJ0RNSTAD, H. E.: Determination of major
cations, anions and trace elements in unfiltered and ultrafiltered
water samples - An intercomparison study (Abstract) 150
KAMP-NIELSEN, L. & FLINDT, M. R.: On-line recording of porewater
profiles from in situ dialysis 151
LE ROUZIC, B. & BERTRU, G.: Nitrogen and phosphorus status of an
estuarine phytoplankton population 157

FRIEDL, G. & WEHRLI, B.: Porewater chemistry and mineralogy of
manganese (Abstract) 161
WEHRLI, B. & DINKEL, C.: Seasonal pore water dynamics in an eutrophic
lake (Abstract) 162
JONES, R. I., SHAW, P. J. & DE HAAN, H.: Effects of dissolved humic
substances on the speciation of iron and phosphate at different pH and
ionic strength (Abstract) 163
RAI, H. & JACOBSEN, T. R.: Dissolved alkaline phosphatase activity
(APA) and the contribution of APA by size fractionated plankton in
Lake Schohsee 164
KRIENITZ, L., KOSCHEL, R., GIERING, B., CASPER, S. J. & HEPPERLE, D.:
Phenomenology of organismic calcite precipitation by Phacotus in
hardwater lakes and ponds of northeastern Germany 170
MISZTAL, M. & G6RNIAK, A.: Preliminary estimate of the organic
substances of lake waters and bottom sediments 175
ONAINDA, M., DE BIKUNA, B. G. & ECHEANDIA, A.: Mineral fluxes in
throughfall and rainfall in a planted forest of Pinusradiata D. DON 177
GABELLONE, N. A., GUISANDE, C. & TOJA, J.: Phosphorus model to
estimate fractions of inorganic phosphorus in sediments of water
bodies 180
AHN, T.-S., CHOI, S.-I. & JOH, K.-S.: Phosphatase activities in Lake
Soyang, Korea 183
OTSUKI, A., GOMA, R. H., AIZAKI, M. & NOJIRl, Y.: Seasonal and spatial
variations of dissolved nitrogenous nutrient concentrations in
hypertrophic shallow lake, with special reference to dissolved organic
nitrogen 187
YAGI, A.: Manganese cycle in Lake Fukami-ike 193
AOKI, T., KUMAGAI, M. & NAKANISHI, M.: Development of DOC probe and
application to water in Lake Biwa 200
KAGAWA, H.: Hydrological factors influencing the effects of the
ecological Ca-Mg index at the head of a river reservoir 203
PEDROZO, F., CHILLRUD, S., TEMPORETTI, P. & DIAZ, M.: Chemical
composition and nutrient limitation in rivers and lakes of northern
Patagonian Andes (39.5° - 42° S; 71 ° W) (Rep. Argentina) 207
DOWNES, M. T. & ADAMS, D. D.: Distribution of oxygen, nitrous oxide,
dinitrogen and methane gases and other redox species at the
sediment-water interface of oligotrophic Lake Taupo, New Zealand
(Abstract) 215
ADAMS, D. D.: Cycling of reduced gases at the sediment-water interface
in lakes of the Taupo Volcanic Zone, New Zealand (Abstract) 216
III. Radiochemical Limnology
ROBBINS, J. A. & HERCHE, L. R.: Models and uncertainty in 210Pb dating
of sediments 217
MANJON, G., GONZALEZ-LASAJO, J., GARCIA-TENORIO, R. & EL-DAOUSHY, F.:
Radionuclide distribution in a lake basin (synopsis) 223
MELIERES, M.-A., POURCHET, M. & PINGLOT, J.-F.: Approche simplifiée du
mixage dans les sédiments traite comme phenomene diffusif. Application
aux sédiments lacustres (Abstract) 226
ROSELL-POLO, J. R. & SEMPERE-TORRES, D.: A new method for the
measurement of height and density profile of snow based on the
attenuation of environmental gamma radioactivity 228
SCHELL, W. R., McGARRY, A., NOVAK, M., MITCHELL, P. I. & WIEDER,
R. K.: Deposition history of lead as revealed in wetland ecosystems
using 210Pb chronology 232
HUBEL, K. & SXNGER, W.: Effects of the Chernobyl accident on South
Bavarian lakes; Compartmental modelling 235
LINDNER, G., KAMINSKI, S., GREINER, I., WONDERER, M., BEHRSCHMIDT, J.,
SCHRODER, G. & KRESS, S.: Interaction of dissolved radionuclides with
organic matter in prealpine freshwater lakes 238
WAN, G.: Remobilization of Pb during the early diagenesis in the
lacustrine sediments 242
POURCHET, M., PINGLOT, J.-F. & MELIERES, M.-A.: Profiles
radioisotopiques sur des sediments de lacs de cratere du Cameroun 249
MURRAY, A. S., JOHNSTON, A., WASSON, R. J. & LEANEY, F.: Holocene
sedimentation rates using the decay of Radium-226 excess (Abstract) 251
CORNETT, R. J., CHANT, L. A. & RISTO, B. A.: The use of isotopic
ratios to measure rates of resuspension (Abstract) 252
TISUE, T., KENDER,J. & CHANG, C.: Cd in Lake Tahoe 253
KADA, J., MONERN, M. & HEIT, M.: xs210Pb and 137Cs profiles in the
laminated sediments of three lakes of the Finger Lake District, New
York State, USA (Abstract) 255
KADA, J. & HEII, M.: xs210Pb and 137Cs as indicators of sediment
focussing of anthropogenic trace elements in lake sediments (Abstract) 256
STREEVER, W. J., GOTTGENS, J. F. & CRISMAN, T. L.: Patterns of
sediment flux in a subtropical permanently flooded cave 257
EVANS, D. W.: Long-term recovery from 137Cs contamination in Par Pond
reservoir, Savannah River plant, South Carolina, USA (Abstract) 261
ABRIL, J. M. & GARCIA-LEON, M.: Modelling radionuclide distributions
in marine and lacustrine sediments 262
APPLEBY, P. G., RICHARDSON, N. & SMITH, J. T.: The use of radionuclide
records from Chernobyl and weapons test fallout for assessing the
reliability of Pb210 in dating very recent sediments 266
GARCIA-OLIVARES, A., AGUERO, A. & GUARDANS, R.: Testing a model of Cs
movement in a catchment-lake system. Problems found in parameter
identification and uncertainty assessment 270
SXRKKX, J., LUUKKO, A. & HORPPILA, P.: Factors influencing the
concentration of Chernobyl-derived cesium in the bottom sediment of
lakes in Finland 279

PALLY, M., BARRE, A. & FOULQUIER, L.: Tritium associe a la matiere
organique de sediments, vegetaux et poissons des principaux cours
d'eau francals 285

NISHRI, A. & KOREN, N.: Sediment transport in Lake Kinneret 290
IV. Lakes. 1. North America
LAPERRIERE, J. D.: Improved methods and access cast doubts on
historical records of an Alaska lake group 293
GU, B. & ALEXANDER, V.: Dissolved nitrogen uptake by a cyanobacterial
bloom (Anabaena Jlos aquae) in a subarctic lake 297
CURTIS, P. J. & PREPAS, E. E.: Trends of dissolved organic carbon
(DOC) concentrations from freshwater to saltwater 298
DINSMORE, W. P. & PREPAS, E. E.: Changes in profundal
macroinvertebrate diversity in a deep eutrophic lake undergoing
hypolimnetic oxygen injection, with particular reference to Chironomus
spp. (Chironomidae) 302
BARICA, J.: Ecosystem stability and sustainability: A lesson from
algae 307
McNAUGHT, S.: Suggestions of biotic niche constraints from the
distribution of Leptodora kindti 312
EVANS, R. D.: Various phenomena observed in lakes which suggest
sediment resuspension as an important mechamsm 318
KRAMER, J. R., BRASSARD, P. & MUELLER, E.: Sediment-metal partitioning
and diagenesis due to resuspension (Abstract) 320
PINEL-ALLOUL, B. & LETARTE, Y.: Relationships between small and large
bacterioplankton and primary producers in Quebec lakes 321
GASOL, J. M., SANDER, B. & SCHALLENBERG, M.: Production of bacteria in
freshwater sediments: Comparison of different cell-specific
measurements to mineralization rates 325
PROULX, M., PICK, F. R., MAZUMDER, A. & LEAN, D. R. S.: Effects of
planktivorous fish on phytoplankton biomass and community structure 331
KERFOOT, W. C. & KIRX, K. L.: Why the hypolimnion is not a desert: The
taste discrimination-temperature hypotheses 335
KITCHELL, J. F., CARPENTER, S. R., HODGSON, J. G., HE, X. & SORANNO,
P. A.: Phosphorus in food webs: Compensatory responses in experimental
lakes 344
VANDERPLOEG, H. A., LIEBIG, J. R. & OMAIR, M.: Bythotrephes predation
on Great Lakes zooplankton measured by an in situ method: Implications
for zooplankton community structure (Abstract) 349
FARWELL, A. J. C. & DUTHIE, H. C.: Distribution, biomass and
seasonality of charophytes in Georgian Bay, Lake Huron, Canada 350
DILLON, P. J., REID, R. A. & EVANS, H. E.: The relative magnitude of
phosphorus sources for small, oligotrophic lakes in Ontario, Canada 355
DEL GIORGIO, P. A. & PETERS, R. H.: The influence of DOC on the
bacteria-chlorophyll relationship in lakes 359
MAKAREWICZ, J. C.: Phytoplankton as indicators of environmental health 363
PETERSEN, R. R.: Recovery of lakes located in the blast zone of Mount
St. Helens 366
GROEGER, A. W. & TIEIJEN, T. E.: Physiological responses of
nutrient-limited phytoplankton to nutrient addition 370
WURTSBAUGH, W. A. & Ll, H. W.: Zooplankton refuges from predation:
Effects of light intensity on feeding by the fish Menidia beryllina
(Abstract) 373
MELACK, J. M., HAMILTON, S. K. & SICKMAN, J. O.: Interannual solute
variations in a high elevation lake of the Sierra Nevada, California 374
BURGI, H.-R., ELSER, J. J., RICHARDS, R. C. & GOLDMAN, C. R.:
Zooplankton patchiness in Lake Tahoe and Castle Lake USA 378
LOEB, S. L.: Impact of aquatic biological analyses on policy decisions 383

GOLDMAN, C. R., JASSBY, A. D. & HACKLEY, S. H.: Temporal scales of
variability in nutrient bioassay response at Lake Tahoe,
California-Nevada, USA (Abstract) 387
GOLDMAN, C. R.: The conservation of two large lakes: Tahoe and Baikal 388
COOPER, C. M.: Effects of suspended sediment reduction on chlorophyll
and water quality in a large natural lake 392
HICKS, R. E., OWEN, C. J. & AAS, P.: Deposition and resuspension of
particulate organic matter in the sediments of Lake Itasca (Abstract) 396
LATHROP, R. C., CARPENTER, S. R. & RUDSTAM, L. G.: The effects of
nutrients and herbivory on water clarity in Lake Mendota since 1900
(Abstract) 397
CARPENTER, S. R., HE, X., MITCHELL, J. F. & SOAANNO, P. A.: Whole-lake
experiments: Is grazer functional response stable? 398
DE STASIO JR., B. T., NIBBELINK, N. & OLSEN, P.: Diel vertical
migration and global climate change: A dynamic modeling approach to
zooplankton behavior 40
ADAMS, M. S., MERGE, T. W. & KAATZ, T. K.: Primary productivity of
three Wisconsin LTER lakes, 1985-1990 406
From, T. M., BENSON, B. J., KAATZ, T. K. & MONTZ, P. K.: Variability
of herbivore and phytoplankton biomass: Implications for theories of
trophic coupling (Abstract) 411
HANSSON, L.-A.: Spatial and temporal variation in algal life-form
shift (Abstract) 412

VAQUE, D. & PACE, M. L.: Importance of Daphnia in determining loss
rates of protozoans and rotifers in lakes with contrasting zooplankton
community structure (Abstract) 413
HENSON, E. B.: Estimating the areal extent of the littoral zone in
lakes 414
BUKAVECKAS, P. A., LIKENS, G. E., Buso, D. C. & WINTER, T. C.:
Hydrologic controls of chemical flux rates in the Mirror Lake
watershed 419
PHLIPS, E. J., ZIMBA, P. V., HOPSON, M. S. & CAISMAN, T. L.: Dynamics
of the plankton community in submerged plant dominated regions of Lake
Okeechobee, Florida, USA 423
DAVALOS-LIND, L. O. & LIND, O. T.: The changing state of limnology in
Mexico: Lake Chapala as an example 427
SLADECEK, V. & VILACLAAA, G.: A water-bloom in Lake Patzcuaro
(Michoacan, Mexico) 431

VILACLARA, G., CHAVEZ, M., LUGO, A., GONZALEZ, H. & GAYTAN, M.:
Comparative description of craterlakes basic chemistry in Puebla
State, Mexico 435
LUGO, A., ALCOCER, J., SANCHEZ, M. R. & ESCOBAR, E.: Trophic status of
tropical lakes indicated by littoral protozoan assemblages 441
ALCOCER, J., LUGO, A., ESTAADA, S., UBEDA, M. & ESCOBAA, E.: Littoral
chironomids of a Mexican Plateau athalassohaline lake 444
CONTAEAAS, F. & KEAEKES, J.: Total phosphorus - chlorophyll
relationships in tropical coastal lagoons in Mexico 448
IV. Lakes. 2. Europe
GAADARSSON, A. & SNORAASON, S. S.: Sediment characteristics and
density of benthos in Lake Myvatn, Iceland 452
YOUNG, J. M., JONES, R. I. & BAILEY-WATTS, A. E.: Studies of the
plankton of Loch Ness, Scotland. 1. Phytoplankton (Abstract) 458
LAYBOURN-PAARY, J. & WALTON, M.: Studies of the plankton of Loch Ness,
Scotland. 2. The microbial loop (Abstract) 459
FULCHER, A. S.: Studies of the plankton of Loch Ness, Scotland
3. Rotifers (Abstract) 460
WILSON, H. M. & O'SULLIVAN, P. E.: The control of eutrophication of
small shallow lakes in the United Kingdom: The legal framework 461
FAAFENG, B. A. & HESSEN, D. O.: Nitrogen and phosphorus concentrations
and N: P ratios in Norwegian Lakes: Perspectives on nutrient
limitation 465
GROSSNICKLE, N. E. & NAESJE, T. F.: Predation by the glacial relicts
Mysis relicta and Heterocope apperzdiculata in Norwegian lakes 470
SKIP, K. L. & SNIPEN, L. G.: Interaction between phytoplankton and
zooplankton in lakes 474
GR0TERUD, O.: The water acidification syndrome. What does the
Norwegian monitoring programme tell us? 478
HESSEN, D. C,.: DNA-damage and pigmentation in alpine and arctic
zooplankton as bioindicators of UV-radiation 482
HAMRIN, S. F.: Lake restoration by cyprinid control in Satofta Bay
(Lake Ringsjon) 487
LINDMARK, G. K.: Soda ash for mitigation in acidified
waters. Long-term lake response and efficiency 494
BELL, R., STENSDOTTER, U., VREDE, K. & BLoMQvIsT, P.: Impact of liming
on the planktonic communities in an acidified Swedish lake (Abstract) 500
MEILI, M., FRY, B. & KLING, G. W.: Fractionation of stable isotopes
(13C, 15N) in the food web of a humic lake 501
AHLGREN, I. & ABEGAZ, Z.: Interactions of light, nutrients and
stratification regimes in controlling phytoplankton primary production
in eutrophic lakes 506
JOHNSON, R. K., WIEDERHOLM, T. & ERIKSSON, L.: Classification of
littoral macroinvertebrate communities of Swedish reference lakes 512
GOEDKOOP, W.: Benthic response to a spring diatom sedimentation event
in mesotrophic Lake Erken (Abstract) 518
COLOM, W., PIERSON, D. C. & RODRIGO, M. A.: The influence of
photoinhibition and algal composition on vertical variations in
chlorophyll a specific photosynthesis (Abstract) 519
HAKANSON, L.: A model to predict gross sedimentation in small glacial
lakes (Abstract) 520
ILMAVIRTA, V.: Response of phytoplankton assemblages to eutrophy in a
shallow headwater lake, southern Finland 521
RASK, M., ARVOLA, L. & SALONEN, K.: Effects of catchment deforestation
and burning on the limnology of a small forest lake in southern
Finland 525
KUOPPAMÄKI, K.: Effects of liming on crustacean zooplankton in an
acidified, artificially divided forest lake in southern Finland 529
JÄRVINEN, M.: Pelagial ciliates in an acidified mesohumic forest lake
before and after lime addition 534
SALONEN, K., ARVOLA, L. & ROSENBERG, M.: Diel vertical migrations of
phyto- and zooplankton in a small steeply stratified humic lake with
low nutrient concentration 539
MONONEN, P. & NIINOJA, R.: Nutrient and chlorophyll concentrations in
the northern part of Lake Saimaa, Finland 544
VILJANEN, M. & KARJALAINEN, J.: Horizontal distribution of zooplankton
in two large lakes in Eastern Finland 548
HUOVINEN, P., HOLOPAINEN, A.-L. & HUTTUNEN, P.: Spatial variation of
community respiration and primary productivity in two large lakes in
Eastern Finland 552
HOLOPAINEN, A.-L., HUOVINEN, P. & HUTTUNEN, P.: Horizontal
distribution of phytoplankton in two large lakes in Eastern Finland 557
KARJALAINEN, J. & VILJANEN, M.: Changes in the zooplankton community
of Lake Puruvesi, Finland, in relation to the stock of vendace
(Coregonus albula (L.)) 563
DALL, P. C, HAMBURGER, K. & LINDEGAARD, C.: Short cutting energy
budgets of littoral zoobenthos communities 567
HAMBURGER, K., DALL, P. C. & LINDEGAARD, C.: Studies on the energy
metabolism of Chironomus anthracinus from the profundal zone of Lake
Esrom, Denmark (Abstract) 574
LINDEGAARD, C., DALL, P. C. & HANSEN, S. B.: Natural and imposed
variability in the profundal fauna of Lake Esrom, Denmark 576
DAHL, A. & WINTHER, L. B.: Life-history and growth of the prosobranch
snail Potamopyrgus jenkinsi in Lake Esrom, Denmark 582
LINDENEG, S.: Application of the gut fluorescence method on the
littoral herbivore, Tinodes waeneri (Trichoptera), in Lake Esrom,
Denmark 587
S0NDERGAARD, M.: Organic carbon pools in two Danish lakes: Flow of
carbon to bacterioplankton 593
HANSEN, A.-M. & JEPPESEN, E.: Changes in the abundance and composition
of cyclopoid copepods following fish manipulation in eutrophic Lake
Vaeng, Denmark (Abstract) 599
MAURIN, N., AMBLARD, C. & BOURDIER, G.: Weekly and diurnal variations
of inorganic carbon incorporation into macromolecules by lacustrian
phytoplankton (Abstract) 600
QUIBLIER, C., BOURDIER, G., AMBLARD, C. & PEPIN, D.: Phytoplankton
pigments as organic markers for the study of phyto-zooplankton
trophic interactions in an oligo-mesotrophic lake (Abstract) 601
CARRIAS, J.-F., AMBLARD, C. & BOURDIER, G.: Seasonal variations of
auto- and heterotrophic flagellated protozoa and trophic relations
with heterotrophic bacteria in an oligo-mesotrophic lake (Abstract) 602
LAIR, N., TALEB, H. & REYEs-MARcHANT, P.: Zooplankton diversity
responses to predation pressure in littoral and limnetic zones of a
eutrophic lake, in France 603
ROFES, G., DURBEC, A., JIGOREL, A., BERTRU, G., MARION, L. & DUTARTRE,
A.: Depots et remises en suspension dans le lac de Grandlieu (France)
608
VAN DER VEER, B., VAN NIEUWENHUYZE, R. F. & DONZE, M.: accumulation of
blue-green algal scums in small harbours and its prevention 610
VAN DER DOES, J. & FRANKING, L. J.: Restoration of Lake Geerplas by
reduction of external phosphorus loading and dredging of phosphorus
enriched upper sediment layer (Abstract) 614
MEUER, M.-L., VAN NES, E. H., LAMMENS, E. H. R. R., GULATI, R. D.,
GRIMM, M. P., BACKX, J., HOLLE-BEEK, P., BLAAUW, E. M. & BREUKELAAR,
A. W.: Fish stock reduction as a restoration measure in the large Lake
Wolderwijd, The Netherlands (Abstract) 615
DRIESSEN, O., PEX, B. & TOLKAMP, H. H.: Restoration of a lake: First
results and problems 617
SCHANZ, F. & FR!EDL, C.: Environmental effects on light utilization by
phytoplankton in a meromictic alpine lake 621
AKERET, B.: Lunar periodicity of the emergence of Chaoborurs flavicans 625
BLOESCH, J.: Methods how to measure bottom sediment resuspension 627
THIES, H.: Biogeochemical properties and mass budget estimates of
dystrophic Lake Huzenbach (Black Forest, Germany) 629
SALA, M. M. & GUDE, H.: Development of microbial ectoenzyme activities
in littoral sediments of Lake Constance (Abstract) 633
SANTER, B.: Do cyclopoid copepods control Daphnia populations in early
spring, thereby protecting their juvenile instar stages from food
limitation? 634
OVERBECK, J.: DOM as modulator of enzyme activity in pelagic bacteria
(Abstract) 638
DUDEL, G. E., RECHENBERG, B. & HfLBIG, K.: The contribution of the
water-sediment-interface to the nitrogen transformation in shallow
lakes 639
CHORUS, I. & SCHLAG, G.: Importance of intermediate disturbances for
the species composition and diversity of phytoplankton in two very
different Berlin lakes (Abstract) 646
KOSCHEL, R., KASPRZAK, P., KREENITZ, L. & RONNEBERGER, D.: Long-term
effects of reduced nutrient loading and food-web manipulation on
plankton in a stratified Baltic hardwater lake (Lake Haussee Germany,
Feldberg) 647
KASPRZAK, P.: The use of an artificially divided bog lake in food-web
studies 652
DOKULIL, M. T.: Long-term response of phytoplankton population
dynamics to oligotrophication in Mondsee, Austria 657
SZELAG-WASIELEWSKA, E.: Phytoplankton in the littoral and pelagial of
the Lake Miedwie 662
GLIWICZ, Z. M. & JACHNER, A.: Lake restoration by manipulating the
behaviour of planktivorous fish with counterfeit information on risk
to predation? 666
RADWAN, S., ZWOLSKI, W., KOWALIK, W., KOWALCZYK, C., POPIOLEK, B. &
KORNUOW, R.: Invertebrates fauna of lakes in Polesie National Park
(eastern Poland) and its protection zone 671