Which consequence does increased sedimentation NOT have on aquatic habitats?

Increased sedimentation can significantly alter aquatic habitats, primarily by affecting water clarity, plant growth, and nutrient dynamics. One consequence of sedimentation is a decrease in light penetration, which occurs when the water becomes clouded with suspended particles. This reduced light can inhibit photosynthesis in aquatic plants and algae, impacting the entire ecosystem.

Sedimentation can also disrupt the growth of aquatic plants by burying their roots and blocking their access to light, further compounding the effects on biodiversity and habitat quality. Another consequence is the reduction of nutrient availability. Though sediments can carry nutrients, excessive sedimentation may lead to nutrient binding to particles, making these essential components less accessible to organisms that rely on them for growth.

The choice indicating "improving habitat complexity" is correct in this context because increased sedimentation typically leads to a more homogenous and less biodiverse environment. Rather than enhancing complexity, it can smother habitats that provide shelter and breeding grounds for various aquatic species, ultimately harming the ecosystem's overall health and stability.