Responses by aquatic macroinvertebrates to prolonged flooding of marsh habitat / Henry R. Murkin
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TextPublication details: Logan, UT : Utah State University, 1983.Description: xiii, 113 leaves : ill. ; 29 cmOnline resources: Abstract: This study examined the seasonal differences in aquatic macroinvertebrate populations within and between the dominant vegetation types in a series of 5-ha experimental marshes in south-central Manitoba. Following periods of normal water depths, the marshes were flooded to 1-m above the existing cattail beds to determine the invertebrate response to above-normal flooding of marsh habitat. The effects of changing invertebrate levels on the waterfowl (Anatidae) and coot (Fulica americana) use of the experimental marshes were also examined. During periods of normal water depths, maximum nektonic invertebrate levels (densities, biomass, and number of taxa) were recorded during mid-summer in open water sites with dense beds of submersed vegetation. During the same time period, minimum nekton levels within the experimental marshes were recorded in stands of emergent vegetation. Benthic invertebrate levels were low in all cover types during periods of normal water depths. Factors affecting in
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Thesis(PhD)--Utah State University, 1983.
Includes bibliographical references (leaves 101-112).
This study examined the seasonal differences in aquatic macroinvertebrate populations within and between the dominant vegetation types in a series of 5-ha experimental marshes in south-central Manitoba. Following periods of normal water depths, the marshes were flooded to 1-m above the existing cattail beds to determine the invertebrate response to above-normal flooding of marsh habitat. The effects of changing invertebrate levels on the waterfowl (Anatidae) and coot (Fulica americana) use of the experimental marshes were also examined. During periods of normal water depths, maximum nektonic invertebrate levels (densities, biomass, and number of taxa) were recorded during mid-summer in open water sites with dense beds of submersed vegetation. During the same time period, minimum nekton levels within the experimental marshes were recorded in stands of emergent vegetation. Benthic invertebrate levels were low in all cover types during periods of normal water depths. Factors affecting in