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 these artificial forests are less stable and less capable of adapting to environmental changes. 
If you would like to explore this further.
   We found that plant diversity in tree plantations was 50.3% lower than in native forests and 74.5% lower than in grasslands. 
MJF Lion ER YK Sharma 

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