John G Stockner Cristiana Callieriand Gertrud Cronberg

Summary 195

I. Introduction 196

II. Sampling, Preservation and Enumeration 197

III. The Non-Bloom-Formers, What are They? 198

IV. A Common Ecology? 198

V. Conclusions 224 Acknowledgements 225 References 225

8 Soils and Rice-Fields 233-255

Brian A. Whitton

Summary 233

I. Introduction 234

II. Soils 234

III. Subaerial Habitats 241

IV. Rice-fields 244

V. Practical Methods 247

VI. Concluding Comments 249 References 249

9 Limestones 257-279

Allan Pentecost and Brian A. Whitton

Summary 257

I. Introduction 258

II. Physical and Chemical Features 258

III. Environments and their Characteristic Communities 259

IV. The Organisms 264

V. Deposition 267

VI. Colonization, Succession and Weathering in Terrestrial and Freshwater Environments 272

VII. InfluenceofTemporalChanges in Nutrients 274

VIII. Concluding Comments 275 Acknowledgements 276 References 276

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