Trisyngyne codonandra

There is little literature available regarding threats to Nothofagus species specifically. The major threats of climate change, fire, nickel mining are having a devastating effect on much of New Caledonia’s flora including Nothofagus species. The species experiences a minor threat from agricultural expansion. The degree to which this impacts the species specifically is not known.

The region is experiencing rapid economic growth, rising population and the constant mining for nickel which is causing many species to become fragmented and extinct in parts of the island. Many of the species habituate to lower montane forests (600–800 m), which suggests that these species are unlikely to be able to shift in response to a changing climate due to poor wind dispersal and the need for specialised soil conditions. Pressure from nickel mining will inevitably affect the future of the species to varying degrees. Being usually confined to ridge tops, it is possible that this species is less harmed by human induced threats but this requires confirmation.

With temperatures beginning to rise coupled with sporadic rain, fires have become more common in parts of New Caledonia. Fires have burnt in to the boundaries of Nothofagus forests in many localities and are directly responsible for the sharp boundaries often formed between rainforest and woodland or maquis. A fire in the Dzumac Ranges in 1991 burnt extensively and damaged N. codonandra forest (Veblen 1996). The number of individuals lost to this fire is not known.

According to the BGCI Plant Search (2017), there are currently two ex situ collections of this species. Some subpopulations of the species occur within protected areas for example in the reserves of Thy, Rivière Bleue and Mount Do).