Abstract
 Temporal variation in Depth Distribution of Coastal Submerged Vegetation Track: Ecology and Conservation Author(s): Hyun Jung Cho, Christopher May, John Young Annual transect distribution of Ruppia maritima, a coastal submerged macrophyte, in Lake Pontchartrain, Louisiana, was visualized using dynamic segmentation. The temporal and spatial variations of vegetation coverage were related to the varying environmental conditions to determine key controlling factors. Transect vegetation survey data was stored as text files and imported into ArcMap 8.1. Ruppia patches on the five survey transects were added as line events onto routes (transect lines) as linear features. Depth measurements, made at three-meter intervals, for each year were interpolated into a grid surface, and the water depth levels were reclassified into seven classes of depth intervals. Ruppia distribution along the line transects was overlaid on the grid surface. Annual Ruppia abundance and distribution changes were primarily controlled by water clarity. The patchiness was related to sandbar structures. Hyun Jung Cho Jackson State University Biology 1400 Lynch St. Jackson , MS 39217 US Phone: 601-979-3912 Fax: 601-979-5853 E-mail: hyun.j.cho@jsums.edu Christopher May Mississippi Department of Marine Resources - Grand Bay National Estuarine Research Reserve 6005 Bayou Heron Rd. Moss Point , MS 39562 US Phone: 228-475-7047 Fax: 228-475-8097 E-mail: chris.may@dmr.state.ms.us John Young Jackson State University e-Center Jackson , MS 39217 US Phone: 601-979-8249 E-mail: john.h.young@jsums.edu |
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