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Pictured Rocks National Lakeshore
Other Invertebrates
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![](https://webarchive.library.unt.edu/eot2008/20081103153508im_/http://www.nps.gov/mwr/templates/images/graphics/spacer.gif) |
![An NPS employee testing for water quality while in an inflatable boat on Little Chapel Lake. An NPS employee testing for water quality while in an inflatable boat on Little Chapel Lake.](https://webarchive.library.unt.edu/eot2008/20081103153508im_/http://www.nps.gov/piro/naturescience/images/Little-Chapel-Lake-sampling-.jpg) |
NPS photo | Little Chapel Lake |
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Zooplankton communities vary among the lakes. In addition, these communities vary seasonally and with depth within the same lake. To date, 35 taxa of cladocerans, 11 species of calanoid and cyclopoid copepods, and two genera of rotifers have been identified from eight lakes in Pictured Rocks National Lakeshore.
As is typical, one cladoceran species, one calanoid copepod species, and one cyclopoid copepod species dominate the zooplankton community in a lake, with other species occurring at much lower relative frequencies. Dominant zooplankton taxa include the cladocerans Bosmina longirostris, Eurycercus lamellatus, Daphnia galeata mendotae, Holopedium gibberum, and Pseudochydorus globosus; the calanoid copepods Skistodiaptomus oregonensis, Epischura lacustris; the cyclopoid copepods Cyclops vernalis and Diacyclops bicuspidatus thomasi; and rotifers of the genus Keratella.
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![The light tower and flagpole of the Au Sable Light Station stand proudly. The light tower and flagpole of the Au Sable Light Station stand proudly.](https://webarchive.library.unt.edu/eot2008/20081103153508im_/http://www.nps.gov/mwr/customcf/apps/CMS_HandF/Pictures/PIRO_TowerFlagPole-DYK.jpg) |
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Did You Know?
Located within Pictured Rocks National Lakeshore, the Au Sable Light Station is on the National Register of Historic Places. Constructed in 1874, the station beacon still shines over Lake Superior's frigid waters. The lamp is now solar powered.
more...
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Last Updated: December 04, 2006 at 13:11 EST |