Geographic coordinates, soil properties, plant species composition and vegetation survey data in the study on tidal marshes of the Ogeechee, Altamaha and Satilla estuaries in Georgia, USA

We examined patterns of habitat function (plant species richness), productivity (plant aboveground biomass and total C), and nutrient stocks (N and P in aboveground plant biomass and soil) in tidal marshes of the Satilla, Altamaha, and Ogeechee Estuaries in Georgia, USA. We worked at two sites within each salinity zone (fresh, brackish, and saline) in each estuary, sampling a transect from the creekbank to the marsh platform. Site-scale and plot-scale species richness decreased from fresh to saline sites. Standing crop biomass and total carbon stocks were greatest at brackish sites, followed by freshwater then saline sites.

本研究针对美国佐治亚州萨蒂拉（Satilla）、阿尔塔马哈（Altamaha）与奥吉奇（Ogeechee）河口的潮汐盐沼，调查了其栖息地功能（植物物种丰富度）、生产力（植物地上生物量与总碳储量）及养分库（地上植物生物量与土壤中的氮（N）、磷（P））的分布格局。研究在每个河口的各盐度带（淡水、半咸水、咸水）内设置两个采样点，沿溪岸至潮滩平台的样带开展采样工作。结果表明，样点尺度与样方尺度的植物物种丰富度均随盐度梯度从淡水向咸水站点逐步降低。地上现存生物量与总碳储量均在半咸水站点达到峰值，其次为淡水站点，咸水站点最低。