Final answer:
Timber companies tend to over-log in regions lacking financial incentives for sustainable practices, often leading to the commercial extirpation of high-value tree species. This issue is pronounced in tropical and boreal forests, where both types of environments suffer from legal and illegal logging that is encouraged by global timber demand and less stringent regulatory frameworks.
Step-by-step explanation:
Timber companies are most likely to engage in over-logging of forests on large-scale and in regions where financial incentives for sustainable practices are absent. In the tropical forests, selective logging of high-value trees such as mahogany has led to extensive degradation and opened remote areas for further destruction. These operations are driven by the high prices in international markets and economic forces that favor immediate profits over sustainability, even heading towards commercial extirpation of species.
In boreal regions like Siberia and the Canadian boreal forests, increased logging activities have been noted, both legally and illegally. This is spurred by the global demand for timber and the lack of stringent regulatory frameworks.
Furthermore, there has been a proliferation of large-scale agriculture in the tropics, such as ranching and soy farming in Amazonia, which in conjunction with logging, mining, and road-building, is exacerbating tropical deforestation.