Aquatic ecosystems : interactivity of dissolved organic matter / edited by Stuart E.G. Findlay, Robert L. Sinsabaugh.

Format:

Book

Contributor:

Findlay, Stuart E. G.

Series:

Aquatic ecology series

Language:

English

Subjects (All):

Aquatic ecology.

Physical Description:

xx, 512 pages : illustrations ; 24 cm.

Place of Publication:

San Diego : Academic Press, an imprint of Elsevier Science, [2003]

Summary:

The health and proper functioning of aquatic ecosystems depends in part on the abundance and composition of dissolved organic matter (DOM). The fluxes and pulses of organic matter influences practically every aspect of stream ecology, biogeochemistry, and productivity. Aquatic Ecosystems addresses crucial questions emerging from the latest research on DOM. Overviews of the source, supply and variability of DOM, surveys of the processes that mediate inputs to microbial food webs, and syntheses consolidating research findings provide a comprehensive review of what is known of DOM in freshwater. This book will be important to anyone interested in understanding the fundamental factors associated with DOM that control aquatic ecosystems.

Contents:

Section 1 Sources and Composition

1 Supply of Dissolved Organic Matter to Aquatic Ecosystems: Autochthonous Sources / Stefan Bertilsson, Jeremy B. Jones, Jr.

II. Algal Sources of Dissolved Organic Matter 4

III. Macrophyte Production of Dissolved Organic Matter 15

2 Sources, Production, and Regulation of Allochthonous Dissolved Organic Matter Inputs to Surface Waters / J. A. Aitkenhead-Peterson, W. H. McDowell, J. C. Neff

II. Source, Production, and Fractions of Dissolved Organic Matter 28

III. Regulation of Allochthonous Dissolved Organic Carbon and Dissolved Organic Nitrogen 51

3 Trace Organic Moieties of Dissolved Organic Material in Natural Waters / D. M. McKnight, E. Hood, L. Klapper

II. Tracers of the Source of DOM in Aquatic Ecosystems 74

III. Biogeochemical Processes: Interactions with Mineral Surfaces 86

IV. Biogeochemical Processes: Surface Water to Sediments 88

4 The Role of Monomers in Stream Ecosystem Metabolism / L. A. Kaplan, J. D. Newbold

II. Monomer Sources and Concentrations 99

III. Factors Affecting Biological Lability 106

5 Molecular Indicators of the Bioavailability of Dissolved Organic Matter / R. Benner

II. Chemical Composition of Dissolved Organic Matter 122

III. Bioreactivity of Dissolved Organic Matter 128

IV. Relationships between the Chemical Composition and Bioreactivity of Dissolved Organic Matter 129

6 Large-Scale Patterns in Dissolved Organic Carbon Concentration, Flux, and Sources / P. J. Mulholland

II. Dissolved Organic Carbon Concentrations 140

III. Dissolved Organic Carbon Exports in Rivers and Streams 147

IV. Sources of Dissolved Organic Carbon 152

V. Synthesis and Future Research Needs 154

7 The Speciation of Hydrophobic Organic Compounds by Dissolved Organic Matter / Yu-Ping Chin

II. Theoretical Considerations 163

III. Analytical Methods for Measuring K[subscript dom] 167

IV. The Effect of Dissolved Organic Matter Composition on Hydrophobic Organic Contaminant Speciation 174

V. Effects of Dissolved Organic Matter on Hydrophobic Organic Contaminant Bioavailability to Aquatic Organisms 178

8 Elemental Complexation by Dissolved Organic Matter in Lakes: Implications for Fe Speciation and the Bioavailability of Fe and P / R. Maranger, M. J. Pullin

II. Biological Importance of Fe 189

III. Biological Fe Demand in Brown- versus Clear-Water Systems 190

IV. DOM and Fe Chemistry in Freshwater 192

V. The DOM-Fe-P Complex in Lakes 194

VI. Factors Influencing the Bioavailability of Fe and P Bound to DOM 199

VII. Elemental Acquisition in Humic Lakes: Implications for Ecosystem Structure and Function 205

Section 2 Transformation and Regulation

9 The Contribution of Monomers and Other Low-Molecular Weight Compounds to the Flux of Dissolved Organic Material in Aquatic Ecosystems / D. L. Kirchman

II. Uptake of Amino Acids and Glucose 218

III. Uptake of Other Monomers and LMW Compounds: Organic Acids 226

IV. Respiration of Monomers 228

V. Coupling Polymer Hydrolysis and Monomer Uptake 229

VI. Specific Bacteria Using Amino Acids and Protein: Functional Groups of Heterotrophic Bacteria 232

VII. Heterotrophic Bacteria as More Than One Functional Group: Does It Matter? 235

VIII. Unknowns, Unresolved Issues, and Conclusions 236

10 Photochemically Mediated Linkages between Dissolved Organic Matter and Bacterioplankton / M. A. Moran, J. S. Covert

II. Is Dissolved Organic Matter Photoproduct Formation Predictable? 245

III. Is Dissolved Organic Matter Photoproduct Formation Ecologically Significant? 255

IV. Photochemical Modifications of Dissolved Organic Nitrogen and Dissolved Organic Phosphorus 258

11 The Importance of Organic Nitrogen Production in Aquatic Systems: A Landscape Perspective / N. F. Caraco, J. J. Cole

II. Model 268

III. System Results 269

12 The Role of Biofilms in the Uptake and Transformation of Dissolved Organic Matter / Helmut Fischer

II. Biofilm Structure 288

III. Supply of Dissolved Organic Matter to Biofilm Bacteria 289

IV. Effects of the Biofilm on Microbial Activity 299

V. Effects of Dissolved Organic Matter Quality and Quantity on the Activity of Biofilm Bacteria 300

VI. Ecosystem Consequences 304

13 Microbial Extracellular Enzymes and Their Role in Dissolved Organic Matter Cycling / C. Arnosti

I. The Role of Extracellular Enzymes in Carbon Remineralization 316

II. Biochemical Aspects of Enzyme Production and Activity 316

III. Measuring Enzyme Activities in Aquatic Systems 319

IV. Extracellular Enzyme Activities in the Water Column and Sediment 321

V. Patterns of Enzyme Activities 324

VI. Relationships between Hydrolysis and Uptake 327

VIII. Research Needs 336

14 Linkages between Dissolved Organic Matter Composition and Bacterial Community Structure / C. M. Foreman, J. S. Covert

II. Methodological Shift 345

III. Relationship between Bacterial Community Structure and Dissolved Organic Matter Composition 348

15 Bacterial Response to Variation in Dissolved Organic Matter / S. Findlay

II. Bacterial Response Variables 364

III. Time Scale and Scope of Bacterial Response Variables 373

Section 3 Approaches to Synthesis

16 Physiological Models in the Context of Microbial Food Webs / T. Frede Thingstad

II. Trophic Mechanisms Controlling Bacterial Consumption 384

III. Organic Forms of Limiting Element (Labile Dissolved Organic Nitrogen and Dissolved Organic Phosphorus) 388

IV. Bacterial Physiology 389

V. Dissolved Organic Matter Production Side 392

17 Patterns in Dissolved Organic Matter Lability and Consumption across Aquatic Ecosystems / P. A. del Giorgio, J. Davis

II. Data Collection 402

III. Data Analysis 405

IV. Patterns of Dissolved Organic Matter Lability among Systems 407

V. Lability of Specific Types of Dissolved Organic Matter 409

VI. Cross-System Patterns in Dissolved Organic Matter Consumption 410

VII. Patterns of Lability along Dissolved Organic Matter Gradients 412

VIII. Temporal Patterns in Dissolved Organic Matter Lability 414

IX. Bioassay versus Metabolic Estimates of Dissolved Organic Matter Consumption 414

X. Factors That Influence Dissolved Organic Matter Lability in Bioassays 417

18 Integrating Dissolved Organic Matter Metabolism and Microbial Diversity: An Overview of Conceptual Models / R. L. Sinsabaugh, C. M. Foreman

II. Community Structure Domain 426

III. Biogeochemical Domain 430

IV. Trophic Domain 439

19 Dissolved Organic Carbon: Detrital Energetics, Metabolic Regulators, and Drivers of Ecosystem Stability of Aquatic Ecosystems / Robert G. Wetzel

II. Seven Directions of DOM Thought and Understanding 461

20 Dissolved Organic Matter: Out of the Black Box into the Mainstream / R. L. Sinsabaugh, S. Findlay

II. DOM-Microbial Interactions 482

III. DOM-Physicochemical Interactions 489.

Notes:

Includes bibliographical references and index.

ISBN:

0122563719

OCLC:

50946602