Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/6499
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dc.contributor.authorJohnson, W. Carteren_US
dc.contributor.authorMayes, Richard A.en_US
dc.contributor.authorSharik, Terry L.en_US
dc.creatorVirginia Polytechnic Institute and State Universityen_US
dc.creatorWetlands Research Program (U.S.)en_US
dc.date.accessioned2016-03-23T20:10:20Zen_US
dc.date.available2016-03-23T20:10:20Zen_US
dc.date.issued1982-08en_US
dc.identifier.govdocTechnical Report Y-82-1en_US
dc.identifier.urihttp://hdl.handle.net/11681/6499en_US
dc.descriptionTechnical Reporten_US
dc.description.abstractWetland-nonwetland transition zones in the Missouri River Basin of the north-central United States were studied in seven wetlands ranging in size, permanence, and salinity to develop an efficient sampling methodology that utilized vegetation data to delineate wetland boundaries. One hundred and sixty species of vascular plants occurred in twenty sample transects. Sampling methodology suggested for use in the study area (200-km radius of Sioux Falls, South Dakota) is a combination of the belt transect method (contiguous quadrats) to estimate cover by species and a cover board to measure vertical structure. The methods require a combined sampling time of about 9 min/m of transect, corresponding to a sampling time of 3.2 hr for a transect of average length. A streamlined methodology was also devised whereby sampling time could be cut in half. General upper and lower borders of the transition zone were determined from direct gradient analysis graphs. Specific borders were determined from the occurrence of compositional dichotomies displayed in ordination models. The upper border of the transition zone is suggested as the most probable wetland border. This border appears to represent the upper limit of disturbance from wetland processes (siltation during drawdown, ice scouring, variable surface and subsurface hydrologic regime). The transition zone (between emergent aquatic and low prairie zones) is strongly influenced by wetland disturbances and, therefore, contains a large proportion of opportunistic, ruderal species. The lower border of the transition zone is highly variable annually, while the upper border appears to be relatively stable.en_US
dc.description.sponsorshipPrepared tor Office, Chief of Engineers, U. S. Army, Washington, D. C. 20314 under Contract No. DACW39-78-C-0098en_US
dc.description.tableofcontentsSummary.....................................................................................................1 Preface........................................................................................................6 List of Figures..............................................................................................9 Part I: Introduction.......................................................................................10 Background.................................................................................................10 Objectives...................................................................................................12 Methodology...............................................................................................12 Additional Information.................................................................................15 Part II: Methodology Testing and Evaluation..............................................17 Testing........................................................................................................17 Evaluation...................................................................................................29 Part III: Transition Zone and Wetland Delineation......................................33 Identifying Specific Borders........................................................................33 Representative Transects...........................................................................34 Conclusions................................................................................................54 Part IV: Needed Research..........................................................................61 References.................................................................................................61 Appendix A: Wetland Transect Characteristics..........................................A1 Appendix B: Direct Gradient Analysis Graphs for Transects 1-20.............B1 Appendix C: Species Sampled..................................................................C1en_US
dc.format.extent135 pagesen_US
dc.format.mediumPDFen_US
dc.language.isoen_USen_US
dc.publisherU.S. Army Engineer Waterways Experiment Stationen_US
dc.relationhttp://acwc.sdp.sirsi.net/client/en_US/search/asset/1040986en_US
dc.relation.ispartofseriesTechnical Report (Wetlands Research Program (U.S.)) ; no. Technical Report Y-82-1en_US
dc.rightsApproved for public release; distribution is unlimited.en_US
dc.sourceThe ERDC Library created this digital resource using one or more of the following: Zeta TS-0995, Zeutcehl OS 12000, HP HD Pro 42-in. map scanner, Epson flatbeden_US
dc.subjectMissouri River Watersheden_US
dc.subjectPlantsen_US
dc.subjectSamplingen_US
dc.subjectVegetationen_US
dc.subjectWetlandsen_US
dc.subjectBotanyen_US
dc.subjectEcologyen_US
dc.subjectWetland delineationen_US
dc.titleUse of vegetation in delineating wetland borders in upper Missouri River Basin : North-Central United Statesen_US
dc.typeReporten_US
Appears in Collections:Technical Report

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