Final answer:
True, selective logging can lead to weaker forests by leaving behind smaller, less valuable tree species, compromising the structure and ecology of the forest.
Step-by-step explanation:
The disadvantage of harvesting trees, particularly in the context of selective logging, is that it can indeed leave behind smaller, less commercially valuable tree species, which may weaken the forest over time. This is because selective logging often targets the largest and most valuable trees, which can result in gaps in the forest canopy and an overall shift in forest composition towards species with less timber value or ecological function. Moreover, the regeneration of high-value tree species can be compromised if smaller individuals are not left to grow and if financial incentives favor short-term gains over sustainable forest management practices. Consequently, the statement that harvesting leaves behind smaller, inferior tree species which may weaken the forest over time aligns with the subject matter discussed in academic literature.