Delta-X: Belowground Biomass and Necromass across Wetlands in the MRD, LA, USA, 2021

This dataset contains total carbon, total nitrogen, and total phosphorus content of belowground biomass (BGB) and necromass (BGN) samples collected from herbaceous wetlands in the Atchafalaya and Terrebonne basins of the Mississippi River Delta in southeastern coastal Louisiana, U.S., during March and August 2021. The data were collected during the Delta-X Spring and Fall deployments.Field measurements were conducted at three sites in the Atchafalaya basin and three sites in the Terrebonne basin. Five of the sites are adjacent to sites from the Coastwide Reference Monitoring System (CRMS). The other site is in the Wax Lake Delta (WLD) without appropriate adjacent CRMS sites. Herbaceous wetland sites in both basins were chosen to represent a salinity gradient including freshwater, brackish, and saline ecosystems. Root biomass samples were collected using a gouge soil auger (Fig. 1).

本数据集收录了2021年3月和8月于美国东南部路易斯安那州沿海阿查法拉亚河三角洲的阿查法拉亚河盆地和特雷博恩河盆地的草本湿地中采集的地下生物量（BGB）和死亡生物量（BGN）样品的总碳、总氮和总磷含量。数据收集工作在Delta-X春季和秋季部署期间进行。现场测量在阿查法拉亚河盆地的三个地点和特雷博恩河盆地的三个地点进行。其中五个地点与海岸广泛参考监测系统（CRMS）的站点相邻，而另一个地点位于瓦克斯湖三角洲（WLD），该地点附近没有合适的CRMS站点。两个盆地的草本湿地站点均被选中以代表盐度梯度，包括淡水、半咸水和咸水生态系统。采用挖土钻（图1）收集了根生物量样本。