Aquatic Microbial Ecology

1 Introduction: Aims, Problems, and Solutions in Aquatic Microbial Ecology.- 1.1 The aims of microbial ecology.- 1.2 Novel solutions to "old" problems.- References.- 2 Origin, Composition and Microbial Utilization of Dissolved Organic Matter.- 2.1 Introduction.- 2.2 Origin and fate of dissolved organic matter.- 2.3 Concentration and characteristics of dissolved organic matter.- 2.4 Dissolved organic matter released by phytoplankton.- 2.5 Glycolic acid: a model compound of algal release.- 2.6 Dissolved free amino acids.- 2.7 Dissolved free carbohydrates.- 2.8 Polyphenols.- 2.9 Conclusions.- References.- 3 Microbial Ectoenzymes in Aquatic Environments.- 3.1 Introduction.- 3.2 Definition of an ectoenzyme.- 3.3 Association of ectoenzymes with microbial cells.- 3.4 Ectoenzyme secretion.- 3.5 Molecular control of ectoenzyme synthesis.- 3.6 Environmental control of ectoenzyme synthesis and activity in aquatic ecosystems.- 3.7 Methods for assaying ectoenzymes.- 3.8 Significance of ectoenzymesin aquatic environments.- References.- 4 Aspects of Aquatic Microbial Carbon Metabolism: Regulation of Phosphoenolpyruvate Carboxylase.- 4.1 Introduction.- 4.2 Basic strategies of biochemical adaptation to the environment.- 4.3 Anaplerotic reactions.- 4.4 Complexity of CO2 dark uptake.- 4.5 Phosphoenolpyruvate carboxylase.- 4.6 Assays, preparation and kinetic properties of phoshoenolpyruvate carboxylase.- 4.7 Regulation of phosphoenolpyruvate carboxylase by effectors.- 4.8 Phosphoenolpyruvate carboxylase and phosphoenolpyruvate carboxykinase.- 4.9 Concluding remarks: biochemical approaches at the ecosystem level.- References.- 5 Approaches to Bacterial Population Dynamics.- 5.1 Introduction.- 5.2 Numerical taxonomic approaches.- 5.3 Immunological approaches.- 5.4 Molecular approaches.- 5.5 Isoenzymes and genetic diversity.- 5.6 Future prospects.- References.- 6 RNA Chemotaxonomy of Bacterial Isolates and Natural Microbial Communities.- 6.1 Ecological relevance of bacterial taxonomy.-