Image from Google Jackets

Peatland Chironomidae (Diptera) : effects of flooding on emergence from Lake 979, Experimental Lakes Area, Ontario / David M. Rosenberg, Allen P. Wiens, Bohda Bilyj, and Lwellyn Armstrong.

By: Contributor(s): Material type: TextTextSeries: Journal of the North American Benthological Society. 20(3) 448-467 Publication details: 2001.Description: illustrations ; 28 cmLOC classification:
  • ROS
Online resources: Summary: The experimental flooding of Lake (L) 979, a small wetland lake at the Experimental Lakes Area (ELA) in northwestern Ontario, provided an opportunity to study effects on the chironomid fauna emerging from the surrounding peatland. Nearby L632 was used as a reference system. The nature of the peatland chironomid fauna in L979 changed dramatically. Most true peatland species were eliminated by the flooding. They were quickly replaced by lacustrine species whose numbers emerging from the flooded peatland increased substantially. In contrast, qualitative and quantitative changes in emergence were minimal from the open-water zone of the lake and from L632. Intensive study of L979 and L632 revealed 12 species of true peatland chironomids in common with other peatlands at the ELA, and added another 18 species to the 37 peatland species already identified from previous studies at the ELA. Most of the 55 species have wide zoogeographic distributions, and probably occur in peatlands all across the boreal zone of Canada, but confirmatory studies are needed.

Includes bibliographical references (pages 465-467).

The experimental flooding of Lake (L) 979, a small wetland lake at the Experimental
Lakes Area (ELA) in northwestern Ontario, provided an opportunity to study effects on the chironomid
fauna emerging from the surrounding peatland. Nearby L632 was used as a reference system.
The nature of the peatland chironomid fauna in L979 changed dramatically. Most true peatland
species were eliminated by the flooding. They were quickly replaced by lacustrine species whose
numbers emerging from the flooded peatland increased substantially. In contrast, qualitative and
quantitative changes in emergence were minimal from the open-water zone of the lake and from
L632. Intensive study of L979 and L632 revealed 12 species of true peatland chironomids in common
with other peatlands at the ELA, and added another 18 species to the 37 peatland species already
identified from previous studies at the ELA. Most of the 55 species have wide zoogeographic distributions,
and probably occur in peatlands all across the boreal zone of Canada, but confirmatory
studies are needed.

Ducks Unlimited Canada Institute for Wetland & Waterfowl (IWWR) Research Library, P.O. Box 1160, Stonewall, MB R0C 2Z0
(204)467-3276|Fax (204) 467-9028|