What is the main problem caused by algae growth in an aquatic system?

The primary concern associated with algae growth in an aquatic system is that it can significantly obstruct visibility, hindering the observation of aquatic animals. When algae proliferate, they create a dense layer that not only diminishes the clarity of the water but also affects the natural behavior and interactions of species within that environment. Observing animals is critical for research, monitoring, and conservation efforts, making this aspect particularly important in the context of aquatic ecosystem management.

While other potential issues associated with excessive algae growth exist, such as altering nitrogen levels or affecting animal behavior, the inability to visually monitor animal populations and their activities is often an immediate and observable consequence that can directly impact research efficacy and management practices. This environmental challenge underscores the importance of maintaining balanced ecosystems to facilitate scientific study and ensure the well-being of aquatic life.