Channelization, sedimentation, pollution, and dam construction always have the potential to alter populations of the species.
en.wikipedia.org Some have proposed reopening it to slow the sedimentation that is filling up the bay.
en.wikipedia.org Signs and symptoms include: intermittent fevers, anemia, leukocytosis, increased sedimentation rate, and other symptoms of inflammatory systemic illness.
en.wikipedia.org In seasonal settlements (recreation areas, camping sites etc.) with conventional gravity sewer systems, sedimentation problems can easily occur as automatic spooling from the daily waste water does not take place.
en.wikipedia.org Thus, it would be very sensitive to human activities such as stream channelization, sedimentation, and impoundment, which are known threats to species viability.
en.wikipedia.org