Final answer:
Eutrophication is a process that causes oxygen depletion in water as a result of excess nutrients. If land use change at Bacchus Marsh leads to increased nutrient runoff, eutrophication could indeed be a true impact.
Step-by-step explanation:
Eutrophication is the process whereby nutrient runoff, particularly from fertilizer use, causes the excess growth of microorganisms in aquatic systems. This overgrowth leads to the depletion of dissolved oxygen levels, which is detrimental to aquatic life and can result in the death of ecosystem fauna. In the context of land use change at Bacchus Marsh, if agricultural activities increase or change in a way that leads to more fertilizer runoff into nearby water bodies, it would contribute to eutrophication and could be considered a true impact of such land use change.
Eutrophication is often indicated by the presence of a heavy algae bloom which results from the excessive nutrients. One of the negative impacts of this process includes the creation of hypoxic or anoxic conditions, which are deadly for fish and other marine animals.
As such, the impact of land use change at Bacchus Marsh could include eutrophication if it leads to increased nutrient runoff into aquatic ecosystems, so the assertion that eutrophication is an impact of land use change at Bacchus Marsh would be true.