. Southeast Montana wetland assessment : developing and refining Montana's wetland assessment and monitoring strategy . Figure 7. Example plot photos from wetland condition assessments in southeast Montana. At each sampling location, we collected detailed soil data by excavating a soil pit 45-60 cm in depth. For each horizon, we recorded depth, soil layers, matrix color, redoximorphic feature color and abundance (%), and soil texture. Soil color was determined using Munsell Soil Color Charts (Munsell Color Company 2000). Level 3 Intensive Assessments: Field methods for Level 3 assessment
. Southeast Montana wetland assessment : developing and refining Montana's wetland assessment and monitoring strategy . Figure 7. Example plot photos from wetland condition assessments in southeast Montana. At each sampling location, we collected detailed soil data by excavating a soil pit 45-60 cm in depth. For each horizon, we recorded depth, soil layers, matrix color, redoximorphic feature color and abundance (%), and soil texture. Soil color was determined using Munsell Soil Color Charts (Munsell Color Company 2000). Level 3 Intensive Assessments: Field methods for Level 3 assessments are detailed in the Montana Ecological Integrity Assessment Field Manual (MTNHP 2011). We collected intensive Level 3 vegetation data at approximately 30% of sites using a 20 m x 50 m releve plot (Peet et al. 1998). This method takes up to six hours per site. The method has been in use by the North Carolina Vegetation Survey for over 10 years (Peet et al. 1998) and has been used to successfully develop a vegetation index of biotic integrity (VIBI) in Ohio (Mack 2004) and Colorado (Rocchio 2006; Rocchio 2007; Lemly and Rocchio 2009). The structure of the plot consists of 10 lOmx 10m(100 m2) modules typically arranged in a 20 m x 50 m array (Figure 8). The plot was subjectively placed within the AA to maximize abiotic/biotic heterogeneity. Capturing heterogeneity within the plot ensures adequate representation of local variations produced by 13
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