Cross-site comparison of historical trends in marsh change at three LTER sites: GCE, VCR, and PIE.

The data provided here are shapefiles which were generated from digitizing historical maps and aerial photographs for a cross site comparison of changes in marshes at the Plum Island Ecosystem (PIE), Virginia Coast Reserve (VCR), and Georgia Coastal Ecosystems (GCE) Long Term Ecological Research (LTER) sites. This dataset includes shoreline shapefiles digitized for 3 time intervals at each site: 1930s/40s, 1950s/70s, and 2013 as well as a table of results from the shoreline change analysis. Centerlines for all the channels were generated from the shoreline shapefiles and are attributed with Strahler (1965) channel order and sinuosity. Additionally, this dataset includes shapefiles of important features (channels, upland, ponds, tidal flats) digitized for each of three sites at three time intervals.

这里提供的数据为shapefile文件，通过数字化历史地图和航空照片生成，旨在对Plum岛生态系统（PIE）、弗吉尼亚海岸保护区（VCR）及乔治亚海岸生态系统（GCE）这三个长期生态研究（LTER）站点的沼泽变化进行跨站点比较。该数据集包含每个站点三个时间区间（1930年代/40年代、1950年代/70年代及2013年）的数字化岸线shapefile文件，以及一份岸线变化分析结果表。所有河道的中心线由岸线shapefile文件生成，并标注有斯特拉勒（Strahler，1965）河道等级及弯曲度属性。此外，该数据集还包含三个站点各三个时间区间内数字化的重要特征（河道、高地、池塘、潮滩）shapefile文件。