What type of organisms do biomanipulation strategies typically aim to introduce or manage?

Biomanipulation strategies primarily focus on managing fish populations within aquatic ecosystems. The rationale behind this approach is that fish play a crucial role in controlling the dynamics of the entire food web. By introducing or manipulating specific fish species, especially those that feed on particular types of organisms, biomanipulation can help restore balance to aquatic environments, reduce excessive algal blooms, and enhance water quality.

For instance, in cases where eutrophication has led to excessive algae growth, the introduction of herbivorous fish can reduce algal populations directly by feeding on them. Moreover, certain carnivorous fish species can help control the numbers of smaller, unwanted fish that may negatively influence water quality and the balance of the ecosystem. This strategy aims not only to improve the immediate conditions of the water body but also to foster a healthier, more sustainable aquatic environment over time.

While other organisms like algae, macroinvertebrates, and plankton are certainly important in aquatic ecosystems, the direct impact of managing fish populations through biomanipulation strategies is more prevalent and effective for achieving desired outcomes in water quality management.