Reservoir sedimentation has become a large and pervasive problem throughout the entire United States. Sedimentation gradually destroys and eliminates the services for which reservoirs were constructed (flood protection, water storage, and recreation), yet sedimentation is also an ecological problem. Organisms that depend on the deep parts of lakes cannot survive if their habitats are being buried by sediments. Perry Lake, in northeastern Kansas, has lost 23% of its original volume. Sediment thicknesses (depth of sediment accrued since lake formation) in the main lake range from 2–140cm, and upper portions of the lake have become unnavigable. To measure the effect of sedimentation the diversity and density of profundal invertebrate macrofauna were sampled. Thirteen taxa were collected and assemblages were dominated by oligochaetes, midges (chironomidae), and the Phantom Midge Chaoborus. No significant associations between sediment thickness and invertebrate metrics were found, however sediment size was correlated positively with % insects and total invertebrates and negatively correlated with blood worms (Chironomus riparius). Water depth was also negatively correlated with total invertebrates. While sedimentation will be a problem in the future for Perry Lake, the current rate of sedimentation seems to not be affecting the profundal invertebrates. Erosion control should concentrate on limiting the entry of small-particle sediments to the lake.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.