Soru

An excerpt from an academic oral presentation delivered by an environmental scientist regarding high-altitude wetland (*bofedal*) rehabilitation in Peru's Huascarán Biosphere Reserve states:

"Welcome, colleagues. Today I am presenting the empirical findings from our three-year wetland rehabilitation project in the bofedales of Peru's Huascarán Biosphere Reserve. High-altitude bofedales serve as critical carbon sinks and natural hydrological regulators, but extensive degradation required targeted interventions. First, to address severe subsoil degradation, our team instituted controlled alpaca rotational grazing; by moving herds every six weeks, we reduced topsoil compaction by 42%, which enabled native root systems to expand freely. Second, we constructed permeable peat-moss fascine weirs across eroded gullies; these biological barriers effectively stabilized water table fluctuations, ensuring the wetland maintained a minimum continuous saturation depth of 15 centimeters throughout the dry season. Third, we initiated the active propagation of the native cushion plant *Distichia muscoides*; these robust vegetative carpets lowered direct surface solar exposure, which reduced evaporative moisture loss by 30%. Finally, we engineered a series of shallow, clay-lined micro-channels that routed high-velocity glacial runoff through sediment basins; this system successfully filtered suspended mineral silt, preventing the clogging of downstream micro-reservoirs."

Based on the presentation, match each ecological restoration technique with its specific documented factual outcome.