Historic changes in populations of burrowing mayflies (Hexagenia limbata) from Lake Erie based on sediment tusk profiles / Trefor B. Reynoldson and A.L. Hamilton.: En13-5/93-04E-PDF
"One of the most dramatic recorded changes in benthic invertebrate community structure due to eutrophication was the elimination of the burrowinq mayfly, Hexagenia limbata, from the western basin of Lake Erie. This was a catastrophic event occurring as a result of two periods of anoxia in the summers of 1953 and 1955. From the examination of sediment cores the changes in historic populations of Hexagenia have been reconstructed from enumeration of mandibular tusks. The changes in the numbers of tusks found in the sediment cores from the western basin of Lake Erie agree well with known historic events but suggest that numbers found in the earliest field samples represent a considerable increase over historic populations. Cores taken from the central basin suggest that Hexagenia was formerly only found in a band around the shore and populations never occurred in the offshore waters. It is suggested that this is strong evidence for the occurrence of brief periods of anoxia in the central basin of Lake Erie prior to cultural eutrophication"--Abstract, page 3.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.878319&sl=0
| Department/Agency | Canada. Environment Canada. International Joint Commission. National Water Research Institute (Canada) |
|---|---|
| Title | Historic changes in populations of burrowing mayflies (Hexagenia limbata) from Lake Erie based on sediment tusk profiles / Trefor B. Reynoldson and A.L. Hamilton. |
| Series title | [NWRI contribution] ; [93-04] |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 16-19). |
| Publishing information | Burlington, Ontario : National Water Research Institute ; Ottawa, Ontario : International Joint Commission, [1993] |
| Author / Contributor | Reynoldson, Trefor B., author. Hamilton, Andrew L. (Andrew Lloyd)author. |
| Description | 1 online resource (21 pages, 4 unnumbered pages) : maps, graphs. |
| Catalogue number |
|
| Subject terms | Sediments Lakes Historical research |
Request alternate formats
To request an alternate format of a publication, complete the Government of Canada Publications email form. Use the form’s “question or comment” field to specify the requested publication.- Date modified: