. Southeast Montana wetland assessment : developing and refining Montana's wetland assessment and monitoring strategy. Wetlands; Wetland ecology. Table 5. Scope and severity ratings for stressors observed within the assessment area (AA) and within a 200-m envelope around the AA. Scope of Disturbances 5 Pervasive - Affects nearly all (>75%) of the envelope or AA. 4 Large - Affects most (>50-75%) of the envelope or AA. 3 Moderate - Affects much (>25-50%) of the envelope or AA. 2 Restricted - Affects some (>10-25%) of the envelope or AA. 1 Small - Affects a small (1-10%) portion of th
. Southeast Montana wetland assessment : developing and refining Montana's wetland assessment and monitoring strategy. Wetlands; Wetland ecology. Table 5. Scope and severity ratings for stressors observed within the assessment area (AA) and within a 200-m envelope around the AA. Scope of Disturbances 5 Pervasive - Affects nearly all (>75%) of the envelope or AA. 4 Large - Affects most (>50-75%) of the envelope or AA. 3 Moderate - Affects much (>25-50%) of the envelope or AA. 2 Restricted - Affects some (>10-25%) of the envelope or AA. 1 Small - Affects a small (1-10%) portion of the envelope or AA. 0 Nil - Little or no observed effect (<1%) on the envelope or AA. Severity of Disturbances 4 Extreme - likely to extremely modify, degrade, destroy, or eliminate the wetland. 3 Serious - likely to seriously modify, degrade or reduce wetland function or condition. 2 Moderate - likely to moderately modify, degrade or reduce wetland function or condition. 1 Slight - likely to only slightly modify, degrade, or reduce wetland function or condition. At least four photos were taken from the AA center at each site (Figure 7). Photos were taken 90° from each other, and the aspect was recorded to the nearest 5° at all photo points. Photo placards were placed in the corner of each photo. Additional photos were taken as needed to document the wetland and surrounding 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
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