Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021

The data included in this database were collected within a project funded by Everglades National Park (ENP). The project was aimed at understanding how fire, characterized by different intensities, differentially affects nutrient cycling in oligotrophic wetlands with distinct levels of phosphorus limitation. The data were collected in the eastern part of the Everglades, close to the boundary of ENP, in South Florida (Homestead). This part of ENP is characterized by marl soils, which are shallow (often less than 10 cm) and C-poor. The data were collected at two sites: one site was more oligotrophic (LP), while the other one had a certain degree of phosphorus enrichment (HP). The database includes date and location (i.e. site and plot) of each sampling event, surface water physio-chemistry, vegetation composition and structure, including dominant macrophyte estimated biomass, litter and root decomposition rates, and carbon, nitrogen, and phosphorus concentrations in the soil, flocculent detrital material, periphyton, sawgrass leaves and roots, and the water column. All these data were collected at different times between September 2018 and March 2021, before and after a prescribed fire that was carried out in February 2020 and which burned all the plots. Each row within the database identifies a unique combination of date and sampling plot.本数据库收录的数据源自大沼泽地国家公园（Everglades National Park, ENP）资助的一项科研项目。该项目旨在探明不同强度火灾对具有差异化磷限制水平的贫营养（oligotrophic）湿地养分循环的影响差异。 数据采集于南佛罗里达州霍姆斯特德（Homestead）的大沼泽地东部区域，该区域毗邻ENP园区边界。此区域的土壤为泥灰岩（marl soils），土层浅薄（通常不足10厘米）且碳含量偏低。 本次研究共设置两处采样样地：一处为贫营养程度更高的样地（LP），另一处则存在一定程度的磷富集（HP）。 数据库涵盖各采样事件的日期与位置信息（即样地与样方）、地表水理化性质、植被组成与结构数据——包括优势大型水生植物的估算生物量、枯落物与根系分解速率，以及土壤、絮状碎屑物质、周丛生物（periphyton）、锯草（sawgrass）叶片与根系以及水柱中的碳、氮、磷浓度。 所有数据采集于2018年9月至2021年3月的多个时段，覆盖2020年2月实施的计划火烧（prescribed fire）前后，该火烧波及全部样方。数据库内每一行对应一组唯一的日期与采样样方组合。