Manual removal of the Japanese knotweed has preserved heritage stations of common butterbur and hart's-tongue fern.
Early hand pruning was conducive to orchids.
The late mowing seems rather ineffective.
The grubbing-up of the Canada golden-rod and American asters was successful.
The bush clearing and selective logging have helped maintain the wood-fringe with narrow-leaved everlasting-pea and liquorice milkvetch.
Common spotted orchid, zigzag clover and lesser butterfly-orchid, species non-adapted to open areas, benefited areas without clearing.
The low dry-stone walls probably favored the installation of viviparous lizard or common wall lizard, observed in 2013, but also the consolidation of the hart's-tongue fern population.

From 2007 to 2012, the number of round-leaved wintergreen footage increased by 50 percent.
On the other hand, those of man orchid fall suddenly and continually.
Whereas 27 plants were counted in 2003, the number reached a peak of 240 in 2006 with the uprooting of the wood small-reed, before collapsing to 13 plants in 2012, despite the continued management.
The observation of gnawed seedlings can assume leaf consumption by herbivores.
Protection against rodents was established in 2013 and will be evaluated at flowering.

On this site, 171 plant species are surveyed.
Given its size and poor soil, this diversity is notable.
Management undertaken in recent years has been essential to maintaining open areas, the most threatened by primary succession.
Thus, the various vegetation layers (pioneer and mature woodland, bushy areas, open areas) provide a mosaic of habitats, and thus remarkable species.
Manual removal of the Japanese knotweed has preserved heritage stations of common butterbur and hart's-tongue fern. Early hand pruning was conducive to orchids. The late mowing seems rather ineffective. The grubbing-up of the Canada golden-rod and American asters was successful. The bush clearing and selective logging have helped maintain the wood-fringe with narrow-leaved everlasting-pea and liquorice milkvetch. Common spotted orchid, zigzag clover and lesser butterfly-orchid, species non-adapted to open areas, benefited areas without clearing. The low dry-stone walls probably favored the installation of viviparous lizard or common wall lizard, observed in 2013, but also the consolidation of the hart's-tongue fern population.
From 2007 to 2012, the number of round-leaved wintergreen footage increased by 50 percent. On the other hand, those of man orchid fall suddenly and continually. Whereas 27 plants were counted in 2003, the number reached a peak of 240 in 2006 with the uprooting of the wood small-reed, before collapsing to 13 plants in 2012, despite the continued management. The observation of gnawed seedlings can assume leaf consumption by herbivores. Protection against rodents was established in 2013 and will be evaluated at flowering.
On this site, 171 plant species are surveyed. Given its size and poor soil, this diversity is notable. Management undertaken in recent years has been essential to maintaining open areas, the most threatened by primary succession. Thus, the various vegetation layers (pioneer and mature woodland, bushy areas, open areas) provide a mosaic of habitats, and thus remarkable species.
Carrière des Nerviens Regional Nature Reserve