A threat to wetlands.
This is not the only threat,
but there are many activities of humans to which can be a threat to wetlands like Roads, dikes and levees can have damaging impacts on wetlands if they alter natural freshwater or tidal flow patterns or hinder the movement of aquatic life. …
Moreover, the ecological health of our remaining wetlands may be in danger from habitat fragmentation, polluted runoff, water level changes, and invasive species, especially in rapidly urbanizing areas.