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Ecological Site Information

Region 9 Ecological Site Specialist Contacts

Tyson Hart
Range Management Specialist
Phone: 936-462-8185
Location: Nacogdoches, TX
Erin Hourihan
Ecological Site Quality Specialist
Phone: 254-742-9855
Location: Temple, TX
David Kraft
Regional Ecological Site Specialist
Phone: 620-343-7276
Location: Emporia, KS
Colin Walden
Range Management Specialist
Phone: 405-742-1223
Location: Stillwater, OK


Provisional Ecological Site (PES) Completion Map
Major Land Resource Areas (MLRAs)
As of October 1, 2018

Map showing status of Provisional ecological site descriptions for FY2016 to FY 2019.

National Instructions, Title 430 – Soil Survey, Part 306 Ecological Site Inventory and Ecological Site Description, dated 4/2/2015, provided guidance on a shared effort between the Soil Science and Resource Assessment (SSRA) and Science and Technology (S&T) deputy areas including NRCS staff at the local, State, and national levels. The instruction implemented a 5-year initiative to be completed in fiscal year 2020.

Provisional Ecological Site Descriptions (PESDs) have been and will continue to be developed on grouped soil components by Major Land Resource Area (MLRA). Provisional ecological sites are first approximations based on broad groupings of soil properties (measured and predicted) and vegetation characteristics associated with those groupings. They are intended to function within the context defined by the MLRAs or refined land resource units (LRUs). The Provisional Ecological Site (PES) concept groups spatial soil units (components) and their properties that exhibit similar behavior in their production, their community dynamics and their response to disturbance. PESDs are the first step in developing correlated and approved ecological site descriptions (ESDs).

Approved Ecological Site Descriptions can be viewed on the Ecological Dynamics Interpretive Tool (EDIT) website

For more information please contact the Ecological Site Specialist in your area.