Accession Number : ADA322649

Title :   Water and Habitat Dynamics of the Mingo Swamp in Southeastern Missouri,

Corporate Author : MISSOURI UNIV-COLUMBIA SCHOOL OF FORESTRY FISHERIES AND WILDLIFE

Personal Author(s) : Heitmeyer, Mickey E. ; Fredrickson, Leigh H. ; Krause, Gary F.

PDF Url : ADA322649

Report Date : 1989

Pagination or Media Count : 33

Abstract : The present report describes surface water relations in a lowland hardwood wetland in the Upper Mississippi Alluvial Valley (MAV). Water regimes were examined by sampling habitats within the Mingo Basin (hereafter, Mingo Swamp) in southeastern Missouri weekly from February 1981 to May 1983. Habitat changes within the Swamp were documented from 1880 to 1983. Habitats within the Mingo Swamp are distributed along elevational and water regime gradients. Lands below 335 ft mean sea level support primarily baldcypress and open-water habitats immediately surrounded by scrub/shrub habitats. Live forests (naturally flooded and green-tree reservoir) occur at higher elevations (336-344 ft) and composed 54% of all habitats in the Mingo Swamp in 1983, 59% in 1973, 63% in 1966, 67% in 1955, 63% in 1941, and 82% in 1880. Dead-tree habitats increased from <1% of the area before 1973 to about 5% by 1983. The live forest is dominated by even-aged stands (mostly 30-40 years old) of pin oaks (Quercus palustris). Light gaps compose about 3% of the forest area. Scrub/shrub, open marsh, and newly created dead-tree habitats usually contained some water >80% of the year and >65% of the growing season. Overcup oak (Quercus lyrata) habitats contained some surface water from November to April each year. Pin oak habitats were usually partly flooded from December to May but were seldom 100% flooded and rarely had surface water >20 cm deep. Light penetration of all waters was low and decreased with increased rainfall and flooding. Alkalinity and conductivity were lower than in most other North American wetlands. pH decreased in fall and winter. Waters flood lowland hardwood wetlands in three ways: on-site rainfall and puddling, backwater flooding, and headwater flooding.

Descriptors :   *WATER, *CULTURAL RESOURCES, *WETLANDS, *ENVIRONMENTAL PROTECTION, *HABITATS, *SWAMPS, WATER FLOW, DYNAMICS, ALLUVIUM, DRAINAGE, PENETRATION, WINTER, SURFACE WATERS, FLOW, RAINFALL, MISSISSIPPI RIVER, FLOODING, VALLEYS, FORESTS, NORTH AMERICA, OPEN WATER, ALKALINITY, SEASONS, SHRUBS.

Subject Categories : Ecology
      Civil Engineering
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE