One possible way to rewrite this passage could be as follows:
The population of a particular species in a given ecosystem is a crucial factor in determining the overall health and balance of that ecosystem. When a species becomes too dominant in the ecosystem, it can lead to a decrease in biodiversity and disrupt the overall functioning of the ecosystem. On the other hand, if a species is underpopulated, it can result in a loss of essential ecosystem services and create imbalances that can have far-reaching consequences.
Maintaining a stable population of all species within an ecosystem is key to ensuring its long-term health and sustainability. This involves implementing conservation measures to protect threatened species and controlling populations of invasive species that can threaten the delicate balance of the ecosystem. By monitoring and managing populations within an ecosystem, we can help to preserve biodiversity and safeguard the health of the environment for present and future generations.
Image by IMM2000 from Flickr.