From 1951-1976, Peter Lake was limed periodically while neighboring Paul Lake was used as a reference ecosystem. We investigated the persistence and variability of the response of Peter Lake to liming by collecting all available historical data on the lakes and by monitoring the limnological properties of both lakes weekly from June-August, 1984. Physical and chemical changes in limed Peter Lake included increases in pH, alkalinity, dissolved inorganic carbon (DIC) concentration, transparency, oxygen content and summer heat content. These changes occurred rapidly in 1951 and have persisted with little variability until 1984. Several differences in algal and zooplankton community composition and dynamics were associated with the physical and chemical changes. Historical data and our observations indicate that the planktonic community structure of Peter Lake has been more variable than that of unlimed Paul Lake.
The American Midland Naturalist has been published for 90 years by the University of Notre Dame. The connotations of Midland and Naturalist have broadened and its geographic coverage now includes North America with occasional articles from other continents. The old image of naturalist has changed and the journal publishes what Charles Elton aptly termed "scientific natural history" including field and experimental biology. Its significance and breadth of coverage are evident in that the American Midland Naturalist is among the most frequently cited journals in publications on ecology, mammalogy, herpetology, ornithology, ichthyology, parasitology, aquatic and invertebrate biology and other biological disciplines.
Simultaneously an international center for Catholic thought, a teaching-focused liberal arts college, and a dynamic hub for research and scholarship, the College of Arts and Letters at the University of Notre Dame provides its students with an education that fuels their passion for learning while preparing them to make a difference in the world. The largest and oldest college in the university, Arts and Letters houses the divisions of the arts, humanities, and social sciences. It encompasses 21 departments, more than 40 undergraduate and graduate degree programs, and a variety of interdisciplinary centers. Approximately 2,500 undergraduates and 750 graduate students pursue degrees through Arts and Letters programs; students from throughout Notre Dame enroll in thought-provoking Arts and Letters courses.
This item is part of a JSTOR Collection.
For terms and use, please refer to our
The American Midland Naturalist
© 1986 The University of Notre Dame