Final answer:
The author believes that the loss of plant species and habitats will displace animals and decrease human wealth.
Step-by-step explanation:
The author's beliefs about the disappearing species can be summarized as follows: the loss of plant species and habitats will displace animals and decrease human wealth. According to the excerpt, the author mentions that if species disappear, new sources of scientific information will be lost, potential biological wealth will be destroyed, and various products and amenities will never come to light. This implies that the loss of plant species and habitats will have negative consequences for both animals and humans.
Learn more about Disappearing species