Volume II - Aquatic Mercury Cycling and Bioaccumulation in the Everglades

Table of Contents

Chapter 1. Aquatic Cycling of Mercury

1.1 Introduction

1.2 Cycling of Mercury in Surface Water

1.3 Cycling of Mercury in Aquatic Soils/Sediments and the Formation of Methylmercury (MeHg)

1.5 Summary and Conclusions

Chapter 2. Sulfur Contamination in the Everglades, a Major Control on Mercury Methylation

William H. Orem, David P. Krabbenhoft, Brett Poulin and George R. Aiken

2.1 Introduction

2.2 Historical and Background Levels of Sulfur in the Everglades

2.3 Present Levels of Sulfate in the Everglades

2.4 Other Forms of Sulfur in the Everglades

2.6 Remobilization of Sulfur from Drought and Fire

2.7 Sulfur Controls on Mercury Methylation

2.8 Other Impacts of Sulfur on the Everglades

2.9 Conclusions

Chapter 3. A Causal Analysis for the Dominant Factor in the Extreme Geographic and Temporal Variability in Mercury Biomagnification in the Everglades

Darren G. Rumbold

3.1 Introduction

3.3 Analysis

3.4 Management Relevant Conclusions

3.5 Final Thoughts

Chapter 4. Dissolved Organic Matter Interactions with Mercury in the Florida Everglades

Andrew M. Graham

4.1 Introduction

4.2 DOM Concentrations and Quality in the FL Everglades

4.3 Hg Complexation by DOM

4.5 DOM and Microbial Hg Methylation

4.6 DOM and Hg and MeHg Photodegradation

4.7 Impact of DOM on Trophic Transfer of MeHg

4.8 Conclusions

Chapter 5. Phosphorus in the Everglades and Its Effects on Oxidation-Reduction Dynamics

Sara A. Phelps and Todd Z. Osborne

5.1. Introduction

5.2. Phosphorus in the Everglades

5.3. Phosphorus Dynamics Effects on Reduction-oxidation Reactions in Wetland Soils

5.4. Unknowns and need for future research

Chapter 6. Major Drivers of Mercury Methylation & Cycling in the Everglades - A Synthesis

Curtis D. Pollman

6.1 Mercury Cycling in the Everglades

6.2 The Role of Organic Carbon

6.4 The Role of Phosphorus

6.5 Major Loss Mechanisms

6.6 Conclusions

Chapter 7. Primer on Methylmercury Biomagnification in the Everglades

Darren G. Rumbold

7.1 Introduction

7.2 MeHg entry into the food chain

Chapter 8. Food Web Structures of Biotically Important Species

Peter C. Frederick, William F. Loftus, Ted Lange and Mark Cunningham

8.2 Eastern Mosquitofish

8.3 Largemouth Bass

8.4 Wading birds

8.5 Florida panther

8.6 Discussion

Chapter 9. Comparison of Everglades Fish Tissue Mercury Concentrations to Those For Other Fresh Waters

Ted Lange

9.1 Introduction

9.2