structure of the ecosystem (lab activity) with aim, apparatus needed, procedure, observation and conclusion.
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The details of a hypothesis-driven experiment that exposes students to the complexity of ecosystem operation are provided. Students test theories about trophic interactions between species, the exchange of nutrients and gases, and the ideal balance of producers to consumers and predators in contained, artificial-seawater ecosystems using live algae, brine shrimp, and sea anemones. In the first iteration of the exercise, single students or small lab groups create a variety of ecosystems with varying organism compositions using straightforward recipes. The ecosystems are disassembled two weeks later, and the students count the species and evaluate salinity, pH, and ammonia levels, among other crucial indicators of water quality. We give some sample data, outcomes, and recommendations for successful implementation. In which the aim of the experiment, its principle, list of the materials to be used, procedure, observation table (if required), inference and discussion.
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