Chironomidae (diptera) community development following experimental manipulation of water levels and aquatic vegetation / by Dale A. Wrubleski
Material type:
TextSeries: Thesis. (Ph.D.)Publication details: Edmonton, AB : University of Alberta, 1991.Description: 226 leaves : illustrations ; 28 cmOnline resources: Abstract: The importance of aquatic vegetation in structuring invertebrate communities of a northern prairie marsh are investigated in two field experiments. In the first experiment, responses by the Chironomidae (Diptera) to the experimental flooding of ten diked marshes in the Delta Marsh, Manitoba were followed over four years. Emergence traps were used in three 'preflood' vegetation types (the terrestrial annual Aster laurentianus, and two emergent macrophytes, Scolochloa festucacea and Scirpus lacustric validus) flooded at two water depths (shallow:20-40cm, deep: 50-70 cm). Highest number of chironomids (9,168 m-2 yr-1)emerged from the deep Aster sites in the first year. The highest biomass of chironomids (22,007 mg m-2 yr-1) was from the deep Scirpus sites in the fourth year. In Aster, a diverse group of chironomids, including epiphytic and bottom- dwelling species, were present from the first application of water. Numbers, biomass and size classes were similar over the four years. In t
| Item type | Current library | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Electronic Theses
|
Electronic Library | Non-fiction | WRU (Browse shelf(Opens below)) | Available | 1617 |
Thesis(Ph.D.) -- University of Alberta
"Spring 1991."
Includes bibliographical references.
The importance of aquatic vegetation in structuring invertebrate communities of a northern prairie marsh are investigated in two field experiments. In the first experiment, responses by the Chironomidae (Diptera) to the experimental flooding of ten diked marshes in the Delta Marsh, Manitoba were followed over four years. Emergence traps were used in three 'preflood' vegetation types (the terrestrial annual Aster laurentianus, and two emergent macrophytes, Scolochloa festucacea and Scirpus lacustric validus) flooded at two water depths (shallow:20-40cm, deep: 50-70 cm). Highest number of chironomids (9,168 m-2 yr-1)emerged from the deep Aster sites in the first year. The highest biomass of chironomids (22,007 mg m-2 yr-1) was from the deep Scirpus sites in the fourth year. In Aster, a diverse group of chironomids, including epiphytic and bottom- dwelling species, were present from the first application of water. Numbers, biomass and size classes were similar over the four years. In t