1 The Estuarine Environment.- 1.1 Introduction.- 1.2 Estuarine circulation.- 1.3 Estuarine sediments.- 1.4 Other physico-chemical factors.- 1.5 Distribution of estuarine organisms.- 1.6 The problems of life in estuaries.- 1.7 The estuarine food web.- 2 Primary Producers Plant production and its availability.- 2.1 Introduction.- 2.2 Salt marshes.- 2.3 Intertidal plants.- 2.4 Phytoplankton.- 2.5 Detritus.- 2.6 Summation of plant and microbial production in estuaries.- 3 Primary Consumers Herbivores and detritivores.- 3.1 Introduction.- 3.2 The mud dwellers.- 3.3 The surface dwellers.- 3.4 Meiofauna.- 3.5 Zooplankton.- 3.6 The primary consumer community.- 4 The Secondary Consumers Carnivores.- 4.1 Introduction.- 4.2 Fish.- 4.3 Invertebrates.- 4.4 Birds.- 4.5 The impact of the secondary consumers.- 5 Estuarine Pollution.- 5.1 Introduction.- 5.2 Mankind's use of estuaries.- 5.3 Methodologies of studying pollution.- 5.4 Organic enrichment.- 5.5 Industrial contamination.- 5.6 Reclamation and engineering works.- 6 The Management of Estuaries.- 6.1 Introduction.- 6.2 Policies.- 6.3 Planning.- 6.4 Practice.- Reading List.