In the 1930s, Italy established Norway spruce monocultures across the Alps to rapidly boost timber production. A 90-year ecological review revealed this deliberate but naive approach backfired, resulting in a 50.3% decrease in plant diversity and a 30% reduction in functional evenness compared to native forests.
In the 1930s, Italy established Norway spruce monocultures across the Alps to rapidly boost timber production. A 90-year ecological review revealed this deliberate but naive approach backfired, resulting in a 50.3% decrease in plant diversity and a 30% reduction in functional evenness compared to native forests. The Ecological Impact of the 1930s Plantings This historical reforestation drive was well-intentioned but fundamentally flawed by replacing diverse native ecosystems with uniform tree plantations. Key findings from the recent study on these stands highlight: Drastic Diversity Drop: - Plant diversity is 50.3% lower than in adjacent native forests and 74.5% lower than in surrounding grasslands. Microclimate Shifts:- The dense, uniform canopy creates cooler, darker, and more acidic soil conditions, which suppresses the growth of understory flora and harms soil fauna. Lower Ecological Resilience: - Functional evenness dropped by 30%, suggesting that the...