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Reforestation using exotic plants can disturb the fertility of tropical soils http://apocadocs.com/s.pl?1212101557
In Burkina Faso, controlled experiments showed that the development of E. camaldulensis, the eucalyptus species most often planted in the world, outside its area of origin, significantly reduced the diversity of the mycorrhizal fungi communities essential for the healthy functioning of the ecosystem.
... also found in the soil of a Senegalese plantation ... where, scarcely a few months after its introduction, the soil’s microbial characteristics had completely changed. ... The soil sampled from areas surrounding the A. holosericea plantation had a balanced distribution of mycorrhizal fungi species, whereas [inside showed] a strong imbalance in the composition of the mycorrhizal fungi community... there is a risk that the Australian acacia might create a new ecosystem whose physical, chemical and biological characteristics will not necessarily be favourable to a recolonization of the habitat by native species.
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Gollygosh. Again with these stories that imply that evolution is smarter than we are.
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