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dc.contributor.authorZaebst, Thomas Winteren_US
dc.date.accessioned2014-03-14T21:43:07Z
dc.date.available2014-03-14T21:43:07Z
dc.date.issued1997en_US
dc.identifier.otheretd-08222008-063023en_US
dc.identifier.urihttp://hdl.handle.net/10919/44319
dc.description.abstractResearch documenting the functional changes of wetlands in response to harvest disturbance has often been limited to initial-response time frames of one or two years. A cypress (Taxodium distichum L. Rich.)-water tupelo ~ aQuatica L.) swamp located in the Mobile-T ensaw River Delta of Southwestern Alabama was harvested in the fall of 1986. Harvest treatments included: c1earcutting the entire study area with helicopter log removal, or with an added simulated rubber-tired skidder transport, or with herbicide control of all regenerating vegetation. An adjacent nondisturbed stand served as a reference area. Remeasurement of the area was initiated seven years after harvest. The helicopter logged and skidder simulation treatments have produced stands of comparable diameter, height, density, and basal area. ~ aqyatica was dominant in the skidder simulation treatment~ ~ tica, ~ nigra, and Fraxinus caroliniana dominated the helicopter treatment. Overstory biomass was less in the helicopter logged areas (20,981 kg/ha) than in the skidder simulation treatment (30,533 kglha). Lowerstory trees in both treatments were of comparable diameter and height, however, the helicopter treatment contained a greater density, basal area, and biomass ofFraxinus caroliniana. The rutting and mounding associated with the skidder simulation treatment favored a greater diversity of both diversity of both lowerstory and herbaceous species. Groundflora biomass was greatest in the herbicide controlled treatment (13,127 kg/ha), comparable in both the helicopter logged and skidder simulation treatments (5128 kg/ha; 5648 kglha, respectively), and least in the reference area (1495 kglha). Sediment accumulation reflected these differences in groundflora biomass; 104 mm in the herbicide controlled treatment, 79 mm and 63 mm in the helicopter logged and skidder simulation treatments, respectively, and 37 mm in the reference area. Three gradients were identified in the study areas via the tests of Latin squares, rows, and columns which actually corresponded to gradients of hydrology and! or sediment deposition. Square two was wetter than squares one or three because square two had fewer residual pullboat runs, which facilitate greater water movement. The rows are indicative of the distance from the main river channel; rows nearer the river are slightly higher in elevation, less inundated, and favor the less flood tolerant species. The columns reflect the sediment trapping patterns of the vegetation and the subsequent effects of site hydrology and nutritional status.en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1997.Z343.pdfen_US
dc.subjectforested wetlanden_US
dc.subjecttimber harvesten_US
dc.subjectbiomassen_US
dc.subjecthydrologyen_US
dc.subjectsedimentationen_US
dc.subject.lccLD5655.V855 1997.Z343en_US
dc.titleRecovery status of a cypress (Taxodium distichum)-water tupelo (Nyssa aquatica) wetland seven years after harvest disturbanceen_US
dc.typeThesisen_US
dc.contributor.departmentForestryen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairAust, W. Michaelen_US
dc.contributor.committeememberZedaker, Sheparden_US
dc.contributor.committeememberOderwald, Richard G.en_US
dc.contributor.committeememberBurkhart, Harold E.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08222008-063023/en_US
dc.date.sdate2008-08-22en_US
dc.date.rdate2008-08-22
dc.date.adate2008-08-22en_US


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