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https://hdl.handle.net/11681/6499
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DC Field | Value | Language |
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dc.contributor.author | Johnson, W. Carter | en_US |
dc.contributor.author | Mayes, Richard A. | en_US |
dc.contributor.author | Sharik, Terry L. | en_US |
dc.creator | Virginia Polytechnic Institute and State University | en_US |
dc.creator | Wetlands Research Program (U.S.) | en_US |
dc.date.accessioned | 2016-03-23T20:10:20Z | en_US |
dc.date.available | 2016-03-23T20:10:20Z | en_US |
dc.date.issued | 1982-08 | en_US |
dc.identifier.govdoc | Technical Report Y-82-1 | en_US |
dc.identifier.uri | http://hdl.handle.net/11681/6499 | en_US |
dc.description | Technical Report | en_US |
dc.description.abstract | Wetland-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.sponsorship | Prepared tor Office, Chief of Engineers, U. S. Army, Washington, D. C. 20314 under Contract No. DACW39-78-C-0098 | en_US |
dc.description.tableofcontents | Summary.....................................................................................................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..................................................................C1 | en_US |
dc.format.extent | 135 pages | en_US |
dc.format.medium | en_US | |
dc.language.iso | en_US | en_US |
dc.publisher | U.S. Army Engineer Waterways Experiment Station | en_US |
dc.relation | http://acwc.sdp.sirsi.net/client/en_US/search/asset/1040986 | en_US |
dc.relation.ispartofseries | Technical Report (Wetlands Research Program (U.S.)) ; no. Technical Report Y-82-1 | en_US |
dc.rights | Approved for public release; distribution is unlimited. | en_US |
dc.source | The 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 flatbed | en_US |
dc.subject | Missouri River Watershed | en_US |
dc.subject | Plants | en_US |
dc.subject | Sampling | en_US |
dc.subject | Vegetation | en_US |
dc.subject | Wetlands | en_US |
dc.subject | Botany | en_US |
dc.subject | Ecology | en_US |
dc.subject | Wetland delineation | en_US |
dc.title | Use of vegetation in delineating wetland borders in upper Missouri River Basin : North-Central United States | en_US |
dc.type | Report | en_US |
Appears in Collections: | Technical Report |
Files in This Item:
File | Description | Size | Format | |
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TR-Y-82-1.pdf | 39.19 MB | Adobe PDF | View/Open |