Sea-level rise and freshwater management are reshaping coastal ecosystems in the Florida Everglades

Datasets include hydrology (water level and salinity), net ecosystem exchange of CO2, photosynthetically active radiation (PAR), and air temperature for a freshwater marl prairie, brackish marsh ecotone, and saline scrub mangrove forest. Data were derived from multiple sources, including two sites from the South Florida Water Management District (SFWMD) DBhydro web database, two sites from the Florida Coastal Everglades Long Term Ecological Research (FCE-LTER) program and three AmeriFlux sites in the Southeastern Everglades region. Ameriflux sites were co-located with FCE-LTER sites. To understand the effects of sea level rise and freshwater management on landscape carbon exchange (C), we measured the net ecosystem exchange of CO2 (NEE) between subtropical wetland ecosystems and the atmosphere along a dynamic salinity gradient. Ecosystems were representative of freshwater marl prairies, brackish marsh ecotones, and saline scrub mangrove forests. In the southeastern Everglades, the magnitude of environmental change was greatest along the coast, where mangrove scrub forests exhibited a greater capacity to maintain CO2 uptake with changing conditions.

本数据集涵盖淡水泥灰岩草原、咸淡水沼泽交错带以及盐生灌丛红树林三类生态系统的水文数据（含水位与盐度）、二氧化碳净生态系统交换量、光合有效辐射（photosynthetically active radiation，简称PAR）以及气温数据。数据集源自多类渠道：包括南佛罗里达水资源管理区（South Florida Water Management District，缩写SFWMD）DBhydro网络数据库中的2个站点、佛罗里达海岸大沼泽地长期生态研究（Florida Coastal Everglades Long Term Ecological Research，缩写FCE-LTER）项目的2个站点，以及大沼泽地东南部区域的3个AmeriFlux站点，其中AmeriFlux站点与FCE-LTER站点为共位布设站点。为探明海平面上升与淡水管理对景观碳交换（C）的影响，本研究沿动态盐度梯度，测定了亚热带湿地生态系统与大气间的二氧化碳净生态系统交换量（Net Ecosystem Exchange of CO₂，缩写NEE）。上述研究涉及的生态系统分别对应淡水泥灰岩草原、咸淡水沼泽交错带与盐生灌丛红树林。在大沼泽地东南部，沿海区域的环境变化幅度最为显著，该区域的盐生灌丛红树林在环境条件改变时，展现出更强的二氧化碳固持能力。