1. Biogeochemistry of Wetlands
Institute of Food and Agricultural Sciences (IFAS)
Biogeochemistry of Wetlands
Science and Applications
June 23 – 26, 2008
Gainesville, Florida
Wetland Biogeochemistry Laboratory
Soil and Water Science Department
University of Florida
Instructors:
Mark Clark; Patrick Inglett;
James Jawitz; Todd Osborne
K. Ramesh Reddy
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10/13/2018
WBL 1

2. Biogeochemistry of Wetlands
Science and Applications
Course Objectives
The objective of this course is to provide participants with the basic concepts involved in biogeochemical cycling of nutrients, metals, and toxic organic compounds in wetlands and aquatic systems.
The Environmental and ecological significance of biogeochemical processes will be described in relation to elemental cycling, water quality, carbon sequestration, and global climate change
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3. Biogeochemistry of Wetlands
Science and Applications
Course Modules
Introduction
Wetland types and communities
Wetland hydrology
Biogeochemical properties
Electrochemical properties
Soil oxygen demand
Adaptation of plants to wetland soil anaerobiosis
Carbon cycling processes
Nitrogen cycling processes
Phosphorus cycling processes
Course Modules
Sulfur cycling processes
Iron, manganese, and other metals
Toxic organic compounds
Soil-water exchange processes
Biogeochemical indicators
Novel processes and new tools
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10/13/2018
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4. Biogeochemistry of Wetlands
Science and Applications
Lecture Outline
Introduction for lecture topic
Learning objectives
Basic principles related to the topic
Examples of current research
Examples of applications to address real world problems
Key points learned from the topic
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5. Biogeochemistry of Wetlands
Science and Applications
Learning Objectives
Define biogeochemical features of wetlands
Define Hydrologic processes
Understand the differences among different wetland soils
Describe oxidation-reduction reactions in wetlands
Understand the organic matter decomposition processes and long-term storage of nutrients and contaminants
Determine the role of nitrogen, phosphorus, and sulfur cycling processes in regulating water quality
Understand the role of metals in regulating nutrient mobility and reactivity
Define the role of exchange processes between soil and water column on water quality
Identify key biogeochemical indicators for wetland assessment
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6. BIOGEOCHEMISTRY
The study of exchange or flux of materials between living and non-living components of the biosphere
G. E. Hutchinson (1944)
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Vladimir Ivanovich Vernadsky (Володимир Іванович Вернадський/Владимир Иванович Вернадский) (March 12 [O.S.

7. BIOGEOCHEMISTS Vladimir Ivanovich Vernadsky G. Evelyn Hutchinson

8. Fertilizers, Animal wastes Rainfall/Dry Deposition
Uplands
Sink/source
Fertilizers, Animal wastes
Biosolids, Wastewater
Rainfall/Dry Deposition
Wetlands
Aquatic Systems
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9. Biogeochemical Cycles – Organic Matter in a WetlandP S
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10. Biogeochemistry of wetlands
Plant biomass P
Inflow
Periphyton P
Litterfall
Outflow
[Black Box] . .
PIP
DIP
DIP
POP
DOP
Peat
Peat
DIP
DIP
accretion
accretion
PIP
[Fe, Al or Ca-
bound P]
DOP
POP
DOP
Adsorbed P
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11. OXYGEN PHOSPHORUS NITROGEN Carbon SULFUR METALS XENOBIOTICS
[Plant detritus,
microbial biomass,
and soil organic matter]
SULFUR
METALS
XENOBIOTICS
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12. Biogeochemical Processes
Carbon
Nitrogen
Phosphorus
Sulfur
Metals
Toxic Organics
Physical
Chemical
Biological
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13. Spatial and Temporal Scales
global,
regions,
states
landscapes,
watersheds km
Time
>1,000 km
soil
aggregate m
pedons,
field plots mm
clay particle,
microbes um nm
Atoms, molecules
Length

14. Organic Matter (Carbon)
Stable Organic Matter
(P Accretion/Stability)
Carbon (productivity)
Phosphorus Cycle
Nitrogen Cycle
Sulfur Cycle
Plant Community
Loading
Hydroperiod
(Accretion/Stability)
Organic Matter
(Carbon)
Phosphorus
Cycle
Nitrogen
cycle
Sulfur
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15. Biogeochemical Cycles – Linkages
Physical
Processes
Organic Matter
Chemical
Processes
Biological
Processes C N P S
Climate
Change
Carbon
Sequestration
Eutrophication
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16. Biogeochemical Cycles – Linkages at Global Scale
Increased nutrient loads …high primary productivity ..eutrophication
High primary productivity ….increased rates of organic matter accumulation… carbon sequestration
High carbon sequestration in soils ..increased rates of microbial activities
Increased rates of microbial activities … increased levels of greenhouse gases
Increased levels of greenhouse gases….climate change
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17. Biogeochemistry of Wetlands
Science and Applications
Upon completion of this course, participants should be able to:
Unique features of wetland ecosystems
Identify role of soils as long-term integrators of elemental storage and ecosystem processes
Describe basic concepts on elemental cycling in soil and water column of wetlands
Define the role of organic matter decomposition processes and long-term accretion of nutrients and contaminants
Assess the nitrogen processing capacity of wetlands
Evaluate the phosphorus retention capacity of wetlands
Define the fate of sulfur, metals, and toxic organic compounds in wetlands
Describe the role of exchange processes between soil and water column on internal load
Identify key biogeochemical indicators for wetland monitoring and assessment
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18. Biogeochemistry of Wetlands
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