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projects > greenhouse gas fluxes for restored and degraded greater everglades wetlands: eddy-covariance flux tower measurements > work plan

Project Work Plan

Department of Interior USGS GE PES
Fiscal Year 2014 Study Work Plan

Study Title: Greenhouse Gas Fluxes for Restored and Degraded Greater Everglades Wetlands: Eddy-Covariance Flux Tower Measurements
Current Study Start Date: FY2011 Current Study End Date: TBD
Location: Big Cypress National Preserve
Funding Source: USGS Greater Everglades Priority Ecosystems Science (USGS GE PES) Program
Funding History: FY05 (SFWMD + USGS); FY06 (SFWMD + USGS); FY07 (SFWMD + USGS); FY08 (SFWMD + USGS); FY09 (SFWMD + USGS); FY10 (None), FY11 (PES), FY12 (PES + USGS), FY13 (PES + USGS WRD)
FY14 USGS Funding:
Principal Investigator: Barclay Shoemaker, USGS Research Hydrologist
USGS Project Officer: Dave Sumner, FLWSC Studies Chief
USGS Technical Officer: Dave Sumner, FLWSC Studies Chief
Supporting Organizations: SFWMD, BCNP, ENP, UM, FAU

Overview & Objective(s):
(1) Measure exchanges of water vapor and greenhouse gases (CO2 and CH4) between the atmosphere and spatially-extensive ecosystems that occur in the Greater Everglades.
(2) Relate measurements of net ecosystem carbon exchange (NEE), gross ecosystem production (GEP), ecosystem respiration (R), and methane production to environmental controls including available water and energy; meteorological conditions; and/or plant physiological activity.
(3) Publish water, energy, carbon cycling and methane production data on the South Florida Information Access website (SOFIA), along with meta-data.
(4) Publish peer-reviewed journals.
(5) Continue collaborations with Federal, State, and University researchers.

Specific Relevance to Major Unanswered Questions and Information Needs Identified:

Estimating carbon accumulation within restored Everglades will require empirical baseline data on the functioning of water, energy and carbon cycles. Baseline data on water, energy and carbon cycling also can help define and predict Everglades ecosystem response to regional (e.g., freshwater discharge) and global (e.g., air temperature and sea level rise) environmental change. However, measurements of carbon, methane, and surface-energy cycling are sparse over plant communities within greater Everglade's wetlands. Specifically, methane production and the quantity of carbon dioxide absorbed or released annually within subtropical forests and wetlands, as well as carbon cycling responses to changes in hydrology, salinity, nutrient loading, forest-fires and/or other factors are poorly known. This project proposes to leverage existing, eddy-covariance flux stations constructed by the South Florida Water Management District in the Big Cypress National Preserve for carbon cycling studies.

Planned Products for FY14:
(1) Operate three eddy-covariance flux stations in BCNP.
(2) Add water, energy, carbon cycling and methane production data into the SOFIA database, along with metadata.
(3) Publish a journal paper entitled "Carbon Accumulation and Methane Production in Subtropical Forested Wetlands".

Work Plan

Task 1: Operate three eddy-covariance flux stations in BCNP.
Task Leaders: Barclay Shoemaker and Mike Wacker
Phone: 954 377 5956
FAX: 954 377 5901
Task priority: 1
Task Personnel: Barclay Shoemaker and Mike Wacker
Task Summary and Objective(s): Perform sites visits every month to download data, perform sensor inspections and complete other maintenance. Instrumentation will be leveled, cleaned, or replaced as necessary. Depth-to-water measurements will be taken with an electric water tape from a measuring point on the top of the well casings to the water surface. Depth-to-water measurements will be used to develop drift corrections for pressure transducers.

Measured data will include carbon fluxes as well as latent heat flux, sensible heat flux, PAR, net radiation, Bowen ratios, soil heat flux, soil water content, soil temperature, water temperature, air temperature, relative humidity and wetland stage. Methane fluxes will be measured at the Dwarf Cypress site. This task will require planning and executing monthly field runs; running EdiPro software scripts for data QAQC, and adding the data into the SOFIA database. Analysis of the data will be required to compute net ecosystem exchange (NEE), ecosystem respiration (R), and gross ecosystem production (GEP).

Task 2: Publish a journal paper entitled "Carbon Accumulation and Methane Production in Subtropical Forested Wetlands".
Task Leaders: Barclay Shoemaker
Phone: 954 377 5956
FAX: 954 377 5901
Task priority: 2
Task Personnel: Dan Botkin (University of Miami), Jordan Barr (ENP) and Scott Graham (University of Central Florida)
Task Summary and Objective(s): Finalize a draft of the journal paper for peer review. Scott Graham and Jordan Barr have finalized their coauthor contributions to this journal paper. Daniel Botkin is currently making contributions to the paper. Submit the paper into the USGS IPDS report tracking system for Supervisory review by Dave Sumner. USGS and journal peer review can begin after the Supervisory review. See update below.

Update: A journal paper entitled "Carbon Exchange between the Atmosphere and Subtropical Forested Cypress and Pine Wetlands" was approved by the USGS for publication. The paper was accepted as a Biogeosciences Discussion paper on 10/11/2014.