What might be an indicator of a healthy ecosystem?

A robust population of various species is a significant indicator of a healthy ecosystem because it demonstrates biodiversity. Biodiversity is crucial for ecosystem resilience, functionality, and productivity. A diverse array of species contributes to different ecological roles, such as pollination, nutrient cycling, and maintaining food webs. When ecosystems possess a wide range of species, they are better able to withstand environmental changes and recover from disturbances.

High biodiversity typically indicates that an ecosystem is well-balanced and has effective interactions among its organisms, resulting in stability and sustainability. Diverse ecosystems can also provide varied resources and services, which are vital for both the environment and human populations.

In contrast, low species diversity, high levels of pollution, and increased invasive species often signify ecological stress or degradation. Low species diversity can lead to vulnerability and instability in ecosystems, while pollution can disrupt habitats and harm living organisms. The presence of invasive species usually indicates an imbalance, as they can outcompete native species and alter ecological dynamics. Therefore, a robust population of various species stands out as a hallmark of ecosystem health.