Seasonal Shifts in Hydric Soil Morphology: Implications for Wetland Delineation
摘要
The identification and delineation of wetlands requires documentation of hydric soils, wetland hydrology, and hydrophytic vegetation. However, identifying hydric soils that exhibit high chroma colors remains challenging as they often lack diagnostic morphological features associated with established Field Indicators of Hydric Soils. In response, this study investigated problematic soil situations in the Slate Belt region of North Carolina using the Hydric Soil Technical Standard (HSTS). Ten study locations were monitored for water table level, anaerobic conditions, and soil morphology over time. Results show dynamic shifts in soil morphological characteristics, with seven locations meeting HSTS requirements and all locations meeting one of more Field Indicator of Hydric Soils during the wet portion of the growing season. However, by July, no study locations met the HSTS criteria, and only three locations continued to exhibit a Field Indicator of Hydric Soils. The study highlights the importance of considering seasonal variations and dynamic soil processes in problematic high chroma soils during hydric soils identification and wetland delineation. When evaluating these soils, practitioners should conduct field assessments during the normal wet portion of the growing season to obtain accurate assessments of wetland resources. This study’s findings have implications for wetland management and call for further research to understand seasonal shifts in high chroma soil morphology, especially in rapidly urbanizing regions.