Nitrogen and phosphorus concentrations were quantified in interstitial water, soil, and the roots of Cladium jamaicense Crantz from four herbaceous wetlands in southeast Mexico, locally known as sabanas, which are established in the karstic valley of the Holbox fracture system (northern Quintana Roo). We used the physicochemical and hydrogeochemical properties of the water to identify the existence of any relationships between nutrient (nitrogen and phosphorus) concentration and stock, and the hydrogeochemistry of each wetland. The wetlands have different classifications: H1 and H2 are palustrine, H3 is lacustrine, and H4 is estuarine. We found greater total phosphorus mass (mg kg⁻¹) in the roots compared to the soil, which was particularly large in the wetland located at the south end of the western fracture. In general, phosphorus and nitrogen had a trend in the interstitial water and soil in which concentration and mass were higher H1 > H3 > H4, different from H2; these trends were not observed in the soil or roots. The N and P concentrations in the soil and roots were different among the wetlands, with the lowest measured at the site with brackish influence. The results presented in this research allow us to compare the nitrogen and phosphorus that can be stored in tropical karst wetlands and relate them to hydrogeochemistry.

对墨西哥东南部四个草本湿地（当地称为萨巴纳斯）的间隙水、土壤和Cladium jamaicense Crantz 根中的氮和磷浓度进行了定量，这些湿地位于霍尔博克斯断裂系统（金塔纳罗奥州北部）的喀斯特山谷中。我们利用水的物理化学和水文地球化学特性来确定养分（氮和磷）浓度和储量之间是否存在任何关系，以及每个湿地的水文地球化学。湿地有不同的分类：H1和H2为沼泽湿地，H3为湖泊湿地，H4为河口湿地。我们发现与土壤相比，根部的总磷质量（mg kg ^{-1 ）更大，在位于西部裂缝南端的湿地中尤其大。}总体而言，间隙水和土壤中磷、氮的浓度和质量均呈现H1>H3>H4的趋势，与H2不同；在土壤或根部中没有观察到这些趋势。湿地土壤和根系中N、P浓度存在差异，受咸水影响的地点测得最低。这项研究中提出的结果使我们能够比较热带喀斯特湿地中可储存的氮和磷，并将它们与水文地球化学联系起来。