SAES-422 Multistate Research Activity Accomplishments Report

Status: Approved

Basic Information

Participants

See attached meeting minutes

Accomplishments

Accomplishments: This year was the 4th year of the study. Our research activities are focused on late spring, summer, and fall. Unfortunately, these plans were severely hindered by the Covid-19 pandemic and the Omicron and Delta variants in previous years. Thus, we are not as far along as we had planned. We are currently analyzing the carbon inputs, decomposition data, and relating that to soil temperature and hydrology. In 2021 we published our work examining how redox reaction with Mn and Fe are affected by hydrology and temperature:  Rabenhorst, M.C., P.J. Drohan, J.M. Galbraith, C. Moorberg, L. Spokas, M.H. Stolt, J.A. Thompson, J. Turk, B.L. Vasilas, and K.L. Vaughan. 2021. Manganese-coated IRIS to document reducing soil conditions. Soil Science of America Journal.  doi.org/10.1002/saj2.20301

Short-term Outcomes: This is the 4th year of this study. We are currently completing our analysis. Our current plan is to complete that analysis by the spring of 2024.

Outputs: Our overall goals are to understand of the role depressional wetlands play in securing carbon and the effect of increasing temperatures will have on these processes, and in the end, C stocks and fluxes in wetlands.

 Activities: (See “action items” from annual project meeting notes on planned activities for 2024)

 Milestones: For 2024, our plans are 1) compile all data; 2) analyze all the data relative to hydrology and soil temperature; 3) draft a manuscript focused on the carbon stocks across the multistate sites relative to temperature, vegetation, and hydrology, and 4) write and submit a new multistate project for the next 5 years.

 

Impacts

  1. We published our manuscript on the effectiveness of Mn IRIS to identify reducing conditions in soils. We found that Mn IRIS were much more effective than Fe IRIS in identifying reducing conditions in the early (colder) growing season. Currently, Fe IRIS is the standard sensor approach to identify reducing conditions in hydric soils. The National Technical Committee for Hydric Soils (NTCHS) oversees the standards used to define hydric soils and thereby how wetlands are defined and identified. Thus, our work is important to professionals identifying wetlands, the scientific community that is trying to develop wetland criteria, and the general public that recognizes the important ecosystem functions of these systems. From our work, we propose that the NHSTC consider accepting Mn IRIS for identifying reducing conditions when soil temperatures are between 5 and 11 degrees C.

Publications

Publications: In 2021 we published our work with the Mn and Fe IRIS (see above). We are working on a second manuscript. Several abstracts have been published from the study.

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