JAEL EDGERTON KENT STATE UNIVERSITY Effects of Labile Carbon Addition on Denitrification and Denitrifiers in a Headwater Agricultural Stream.

Slides:

Advertisements

Similar presentations

Cycles of Matter Organisms are mainly composed of C, H, O & N

Advertisements

Lecture Goals To discuss why nitrogen and phosphorus are important nutrients in freshwater systems. To trace how nitrogen and phosphorus move through freshwater.

Nutrient Cycles in Ecosystems

Ecosystem Ecology. Serengeti at Sunrise Biogeochemistry.

Marine Nitrogen Cycle Matthieu Heine. Marine Nitrogen Cycle Global patterns of marine nitrogen fixation and denitrification. Nicolas Gruber and Jorge.

Nitrogen In Groundwater from Ground-Water Microbiology and Geochemistry By: Francis H. Chapelle Images are from Google searches and for visual effect only.

Chapter 12 Chapter 12 The Global Cycles of Nitrogen and Phosphorus Copyright © 2013 Elsevier Inc. All rights reserved.

2-3 Nitrogen Cycle.

唐剑武 Recent advances in ecosystem nitrogen cycling: mechanism, measurement, and modeling of N 2 O emissions.

Nitrate Dynamics at ALOHA and K2 Karen Casciotti Woods Hole Oceanographic Institution Department of Marine Chemistry and Geochemistry.

Influence of Geomorphic Complexity on Hyporheic Flow and Nutrient Processing Prepared by Dan Baker for CE 413.

Lecture 18 The Ocean Nitrogen Cycle Denitrification Reactions Distributions Nitrogen Fixation Reactions Distributions.

Drew Meyers Paracoccus denitrificans Agriculture: 73%, 17% from Nitrate runoff Wastewater: 3% UNEP 2013 N2O Report.

(commercial fertilizers)

Box 1 CO 2 mitigation potential of managed grassland: An example Franzluebbers et al. (2000; Soil Biol. Biochem. 32: ) quantified C sequestration.

The Biogeochemical Cycles © 2003 John Wiley and Sons Publishers Fig 4.5 Periodic table of the elements.

Corianne Tatariw, Elise Chapman, Dr. Jennifer Edmonds

1 Nutrient Cycling and Retention Chapter 19 nitro/biggraph.asp.

Chapter 22 Lecture Outline

Where Nitrogen is Stored Large Stores In the atmosphere where it exists as a gas (78%) Oceans and within organic matter in soil Small Stores Within terrestrial.

The Chemical Composition of Seawater Winn Johnson 25 August 2015 Regional Maritime University.

Part I: Nitrogen and Phosphorus

Puget Sound Oceanography 2011 Nutrients. Deviation from Redfield Ratios:

THE NITROGEN CYCLE. Importance of Nitrogen in amino acids (building blocks of proteins) in nucleic acids (ex. DNA)

LOW-LEVEL ADDITION OF DISSOLVED ORGANIC CARBON INCREASES NITROGEN UPTAKE AND BACTERIAL BIOMASS PRODUCTION IN AN ALASKAN HEADWATER STREAM Caleb J Robbins.

Remote input of nutrients in a changing climate

Diversity and Functional Variation of Denitrifying Bacterial Communities in the Cape Fear River Estuary Brian Shirey Marine Biology.

How do ecosystems work? Part 2! Chapter 41. How does increased CO 2 cause global warming?  Greenhouse effect: Certain gases in the atmosphere (water.

EAS 4300 Guest Lecture Georgia Tech Biological Oceanography JPM Nutrient Cycles Nutrient limitation –N sources N Cycle –Budget –N 2 Fixation Links to the.

Cycles in an Ecosystem Water, Carbon, and Nitrogen.

N cycling in the world’s oceans

Phosphorus Cycle Q: What is the phosphorus cycle? A: The phosphorus cycle is the movement of phosphorus from the environment to organisms and then back.

Nutrient Cycling and Retention

3-3 Cycles of matter. Recycling in the Biosphere Unlike the one-way flow of energy, Unlike the one-way flow of energy, MATTER is recycled within and between.

Biogeochemical Cycles and Energy Flow. Two Secrets of Survival: Energy Flow and Matter Recycle  An ecosystem survives by a combination of energy flow.

1.1.4 and Thermodynamics nutrient cycles

Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Nutrients circulate through ecosystems Physical matter is circulated.

BIOGEOCHEMISTRY. What is Biogeochemistry? The study of the biological, geological and chemical factors that influence the movement of chemical elements.

The Nitrogen Cycle Sources of Nitrogen

Carbon and nutrients in rivers of the North Slope Amy Townsend-Small and James McClelland The University of Texas at Austin.

N cycling in the world’s oceans. Nitrogen N is an essential nutrient for all living organisms (nucleic acids and amino acids) N has many oxidation states,

Ecosystems Ecology Part 2

NOVEMBER 28, 2016 T.O.C. Necessary Nutrients POST LAB

The Global Oxygen Cycle

Recycling of the elements

Chapter 3: Earth’s Environmental Systems

Global Nitrogen Cycle, Eutrophication, and Coastal Hypoxia: State of Knowledge and Management Robert J Díaz

Unit 4 - Nutrient Cycles in Marine Ecosystems

Critical Zone C, N, and P Cycling

Nutrient Cycles in Ecosystems

How do ecosystems work? Part 2!

Cycles of Matter.

The Carbon, Nitrogen and Phosphorus Cycles

Chapter 46 Opener.

Nitrogen Transport Estimates in the San Antonio River Basin

Which earth cycle am I? Answer the questions to figure out what I am. Am I the Water Cycle Nitrogen Cycle Carbon Cycle Oxygen Cycle.

Cycling of matter Section 3.4. Cycling of matter Section 3.4.

Matter cycles • Organisms are reservoirs of these atoms, in various forms • Organisms are part of the cycling of these atoms, via various metabolic processes.

The Nitrogen and Phosphorus Cycles

Advanced Ecology Option C.

Sedimentary denitrification

Predict: Where the water on the leaves came from?

하구및 연안생태Coastal management

Chapter 5 Objectives List the three stages of the carbon cycle.

Chapter 3: Earth’s Environmental Systems

BIOGEOCHEMISTRY Nitrogen Cycle Slide:

The Nitrogen Cycle.

하구및 연안생태Coastal management

Chapter 3: Earth’s Environmental Systems

Chapter 3: Earth’s Environmental Systems

Presentation transcript:

JAEL EDGERTON KENT STATE UNIVERSITY Effects of Labile Carbon Addition on Denitrification and Denitrifiers in a Headwater Agricultural Stream

Anthropogenic Changes to the Global N-Cycle Human activities - increased inputs of fixed nitrogen Nitrogenous fertilizer runoff- Eutrophication Hypoxia Deadzone formatio n. Microbial Denitrification – stepwise reduction of NO 3 to N 2 by facultative anaerobes Denitrification –returns biovailable N can to the atmosphere.

Labile Carbon Additions to a Midwestern Agricultural Stream 1. How tightly coupled are DOC and N cycling? 2. How does denitrification in an agricultural stream respond to changes in the pool of DOC? 3. Is the response mediated through changes in the microbial community? Formate:acetate coupled with 15-N tracer Whole stream uptake of C and N, and denitrification rate Microbial community structure Sensor technology -chemical and physical variables in the water column

Results Effectively shifted the carbon dynamics of the stream Increased N-demand via assimilatory mechanisms Did not effect denitrification rate Shifted the overall microbial community (as demonstrated by 16S rRNA gene TRFLP profiles) Assimilatory N-Uptake and Denitrification Figure credit: Todd V. Royer

Why wasn’t Denitrification Affected? Figure credit: Todd V. Royer

Future Directions Location—sediment level, reducing conditions, hypoxia Scale- centimeter scale, millimeter scale, micrometer scale R.L. Meyer et al. (2008). Marine Chemistry 110, 68–76.