Leia o texto, a seguir, e responda à questão.
If global temperatures rise, can forests still flourish in their current ranges? Some scientists think not, so British Columbia – with assistance from the U.S. Forest Service – is now testing the climate tolerance of 15 common and commercially valuable tree species in non-native habitats. The aim: to identify ones that can be moved into areas expected to be more hospitable in the future.
Called assisted migration, the controversial approach presumes “evolution can’t keep up with the rate climate change, so it needs some help”, says project head Greg O’Neill. Detractors of the increasingly studied forestry practice cite the risks of altering ecosystems.
British Columbia has already extended the legal range in which timber companies can plant western larch seedlings. Other species, including Douglas fir and lodgepole pine, are being tested at sites spanning 1,700 miles, from Canada’s Yukon to California. These will be monitored for 30 years to evaluate their survival. “One day we could rely on Washington’s seed, Washington on Oregon’s, and so on”, says O’Neill. “It’s a problem that know no geographic bounderies”.
(SHYR, L. Future Forests. National Geographic. v.222, n.1, p.29, jul. 2012.)
Com relação ao projeto de migração assistida, considere as afirmativas a seguir.
I. É criticado pela possibilidade de alteração de ecossistemas.
II. É um projeto que encontra consenso entre os cientistas.
III. Está sendo mantido dentro das fronteiras geográficas do Canadá.
IV. Pressupõe que a evolução seja mais lenta que as mudanças climáticas.
Assinale a alternativa correta.