Recall the niche that bacteria in the soil hold. Explain how the amount of bacteria in the soil could increase or decrease the amount of biodiversity in an ecosystem.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

a community that experiences major changes undergoes progress