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How can metabolomics help environmental scientists measure the effects of pollutants on ecosystems?

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Diagram illustrating metabolism with two sections: anabolic reaction on the left shows energy used to build larger molecules from smaller ones, while catabolic reaction on the right shows larger molecules breaking down into smaller molecules with energy released. — Metabolomics In anabolic reactions, a cell uses energy to combine small molecules into larger molecules. In catabolic reactions, molecules are broken down, and energy is released.

Metabolomics allows environmental scientists to assess the health of an ecosystem by studying the molecular physiology of resident organisms, particularly those acting as sentinel species.1

By analyzing the metabolome—the complete set of chemical substances produced through metabolism—researchers can detect functional changes in an organism's biochemistry caused by environmental stressors like pollutants. Because these metabolites reflect the interaction between an organism's genes and its environment, they provide a sensitive, real-time indicator of how external toxins affect biological health.213

Scientists often utilize specific sentinel species that readily accumulate pollutants to monitor different habitats:
* Terrestrial: Earthworms1
* Freshwater: Fathead minnows1
* Marine: Mussels1

By comparing the metabolic profiles of these organisms in polluted versus control environments, researchers can identify specific molecular changes associated with toxic exposure, offering a powerful tool for environmental monitoring and the protection of ecological integrity.14