Twelfth International Diatom Symposium: Proceedings of the Twelfth International Diatom Symposium, Renesse, The Netherlands, 30 August – 5 September 1992

Front Matter....Pages i-xii
History of diatom research in The Netherlands and Flanders....Pages 1-9
Patterns of sexual reproduction in diatoms....Pages 11-20
Hustedt’s study of the diatom species Tetracyclus ellipticus : why history is not just a chronicle of events....Pages 21-30
Freshwater gomphonemoid diatom phylogeny: preliminary results....Pages 31-38
Morphological variability of the diatom Cyclotella atomus Hustedt var. atomus and C. atomus var. gracilis var. nov.....Pages 39-47
Morphology and taxonomy of Cyclotella tasmanica spec. nov, a newly described diatom from Tasmanian lakes....Pages 49-56
Morphology and ultrastructure of teratological forms of the diatoms Stephanodiscus niagarae and S. parvus (Bacillariophyceae) from Hamilton Harbour (Lake Ontario, Canada)....Pages 57-66
Morphological variation in populations of the diatom Asterionella ralfsii W. Smith from Nova Scotia, Canada....Pages 67-73
Observations on Cymbella mexicana (Ehrenb.) Cleve var. mexicana (Bacillariophyceae) with special reference to the band structure....Pages 75-80
 Amphora margalefii Tomàs var. lacustris P. Sánchez var. nova, a new brackish water diatom....Pages 81-86
 Cymbellonitzschia diluviana Hustedt (Bacillariophyceae): Habitat and auxosporulation....Pages 87-96
 Surirella sparsipunctata Hustedt and S. sparsipunctata var. laevis Hustedt (Bacillariophyceae), a light and electron microscopical study....Pages 97-101
 Eucampia Index as an indicator of the Late Pleistocene oscillations of the winter sea-ice extent at the ODP Leg 119 Site 745B at the Kerguelen Plateau....Pages 103-112
Diatoms in surface sediments of the Indonesian Archipelago and their relation to hydrography....Pages 113-128
Diatoms in recent Atlantic (20° S to 70° N latitude) sediments: abundance patterns and what they mean....Pages 129-135
Diatom-inferred productivity changes in the eastern equatorial Pacific: The Quaternary record of ODP Leg 111, Site 677....Pages 137-151
 Actinoptychus splendens (Shadbolt) Ralfs (Bacillariophyceae): a biostratigraphic marker for the later part of the Holocene coastal deposits along the southern North Sea....Pages 153-158
Evolution of the Pretoria Saltpan — a diatom record spanning a full glacial-interglacial cycle....Pages 159-166
Diatoms and their preservation in the sediments of Lake Neuchâtel (Switzerland) as evidence of past hydrological changes....Pages 167-178
Development of diatom-based salinity models for paleoclimatic research from lakes in British Columbia (Canada)....Pages 179-196
Toxic diatoms in western Washington waters (U.S. west coast)....Pages 197-205
Growth characteristics of the diatoms Pseudonitzschia pungens and P. fraudulenta exposed to ultraviolet radiation....Pages 207-212
Comparison of two domoic acid-producing diatoms: a review....Pages 213-224
Diatom bloom in the tidal freshwater zone of a turbid and shallow estuary, Rupert Bay (James Bay, Canada)....Pages 225-233
Diatoms in surface sediments of the Gotland Basin in the Baltic Sea....Pages 235-242
Diatom assemblages in superficial sediments from the Gulf of Riga, eastern Baltic Sea....Pages 243-249
A comparison of phytoplankton assemblages in the Chesapeake and Delaware estuaries (USA), with emphasis on diatoms....Pages 251-261
Spatial and temporal variation in community composition and photosynthetic characteristics of phytoplankton in the upper Westerschelde estuary (Belgium, SW Netherlands)....Pages 263-273
Short-term fluctuations in benthic diatom numbers on an intertidal sandflat in the Westerschelde estuary (Zeeland, The Netherlands)....Pages 275-284
Diatoms as a tool for reconstructing sedimentary environments in coastal wetlands; methodological aspects....Pages 285-296
Reconstruction of sedimentary environments in Holocene coastal deposits of the southwest Netherlands; the Poortvliet boring, a case study of palaeoenvironmental diatom research....Pages 297-306
Colonization processes of diatoms on artificial substrates in the River Danube near Budapest (Hungary)....Pages 307-315
Winter blooms of centric diatoms in the River Danube and in its side-arms near Budapest (Hungary)....Pages 317-325
Diatom communities in the Vanishing and Ornithologist Creek, King George Island, South Shetlands, Antarctica....Pages 327-333
Diatom communities of acidic mountain streams in Poland....Pages 335-342
The assessment of water quality in the Artois-Picardie water basin (France) by the use of diatom indices....Pages 343-349
Perspectives for the use of diatom assemblages in the water management policy of Overijssel (The Netherlands)....Pages 351-359
The recent palaeolimnology of Lake Nicholls, Mount Field National Park, Tasmania....Pages 361-370
The influence of catchment size on lake trophic status during the hemlock decline and recovery (4800 to 3500 BP) in southern Ontario lakes....Pages 371-390
Diatom assemblages and their relationship to environmental variables in lakes from the boreal forest-tundra ecotone near Yellowknife, Northwest Territories, Canada....Pages 391-404
Changes in diatom assemblages in the profundal sediments of two large oligohumic lakes in eastern Finland....Pages 405-413
Eutrophication and recovery of Lake Vesijärvi (south Finland): Diatom frustules in varved sediments over a 30-year period....Pages 415-426
The use of diatoms in monitoring the development of created wetlands at a sandmining site in Western Australia....Pages 427-436
Diatoms on herbarium macrophytes as indicators for water quality....Pages 437-445
Freshwater diatom ecology: developing an experimental approach as an aid to interpreting field data....Pages 447-452
Effects of nutrient (N, P, C) enrichment upon the littoral diatom community of an oligotrophic high-mountain lake....Pages 453-462
Diatom ecology in the phyllosphere of the common duckweed ( Lemna minor L.)....Pages 463-471
Diatom preservation: experiments and observations on dissolution and breakage in modern and fossil material....Pages 473-484
Weighted averaging partial least squares regression (WA-PLS): an improved method for reconstructing environmental variables from species assemblages....Pages 485-502
A taxonomic database and linked iconograph for diatoms....Pages 503-508
“Omnidia”: software for taxonomy, calculation of diatom indices and inventories management....Pages 509-513
Generic names in current use in the diatoms: report on a workshop....Pages 515-517
“Linnaeus” and beyond: workshop report on multimedia tools for the identification and database storage of biodiversity....Pages 519-525
Toxic diatoms: report on a workshop....Pages 527-527
Back Matter....Pages 529-540