How can fluctuations in temperature impact water samples?

Fluctuations in temperature can significantly affect water samples primarily because they lead to changes in solubility and microbial activity. As temperature increases, the solubility of certain gases, such as oxygen, typically decreases, which can impact aquatic life that relies on dissolved oxygen. Higher temperatures can also promote microbial growth, leading to increased biological activity in the water sample. This can result in higher levels of nutrients and potentially harmful pathogens, altering the water's overall quality and the accuracy of the sample analysis. Understanding these temperature-related effects is crucial for interpreting results accurately and ensuring that water sampling practices reflect genuine conditions in the aquatic environment.