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Hydrogeochemical Influence on the Nitrogen and Phosphorus Concentration and Stocks in Herbaceous Karst Wetlands

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Abstract

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.

Resumen

Esta investigación cuantificó nitrógeno y fósforo en agua intersticial, suelo y raíces de Cladium jamaicense Crantz en cuatro humedales herbáceos del sureste de México, conocidos localmente como sabanas, que se establecen en el valle kárstico del sistema de fracturas de Holbox (norte de Quintana Roo). Basados en las propiedades fisicoquímicas e hidrogeoquímicas del agua, exploramos la existencia de relaciones entre las concentraciones y cantidad de nutrientes (nitrógeno y fósforo) y la hidrogeoquímica de cada lugar. Los humedales tienen diferente clasificación, H1 y H2 son palustres, H3 es lacustre y H4 es estuarino. Encontramos la mayor masa de fósforo (mg kg−1) en las raíces, particularmente del humedal ubicado en el extremo sur de la fractura occidental. En general, el fósforo y el nitrógeno presentaron comportamientos similares en agua intersticial y suelo (H1 > H3 > H4, diferente de H2), estas tendencias no se observaron en suelo ni raíces. Las concentraciones de N y P en el suelo y las raíces fueron diferentes entre los humedales, las más bajas se midieron en el sitio con influencia salobre. Los resultados presentados en esta investigación permiten identificar diferencia en el nitrógeno y el fósforo que pueden almacenarse en humedales kársticos tropicales y relacionarlo con la hidrogeoquímica del sitio.

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Data Availability

The datasets generated during and/or analyzed during the current study are available at http://cicy.repositorioinstitucional.mx/jspui/handle/1003/2118

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Acknowledgements

Funding was provided by the Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCYT, México) Project “Modelación del ciclo del agua en la península de Yucatán” (Grant Catedras CONACYT 2944) and Comisión Nacional del Agua (CONAGUA, México) Project “Atlas de humedales del sur-sureste y sus amenazas” (Grant 37,001). Pedro Zapotecas received the CONACYT scholarship number 760914. Mariana Bravo, Benjamin Antele, and Hector Manuel Loeza Ríos for their field assistance and logistic support. To Ejido Chiquilá-San Angel (Lázaro Cárdenas, Quintana Roo) and Ejido la Esperanza (Lázaro Cárdenas) for granting access to their lands.

Funding

Funding was provided by Consejo Nacional de Ciencia y Tecnología (CONACYT, México) Project “Modelación del ciclo del agua en la península de Yucatán” (Grant Catedras CONACYT 2944) and Comisión Nacional del Agua (CONAGUA, México) Project “Atlas de humedales del sur-sureste y sus amenazas” (Grant 37001). Pedro J. Zapotecas-Tetla received the CONACYT scholarship number 760914.

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Contributions

Pedro J. Zapotecas-Tetla, Daniela Ortega-Camacho, Gilberto Acosta-Gonzalez, and Eduardo Cejudo contributed to the study´s conception and design. Material preparation, data collection, and analysis were performed by Pedro J. Zapotecas-Tetla, Daniela Ortega-Camacho, Héctor Estrada-Medina, Elizabeth Hernandez-Alarcón, Gilberto Acosta-González, and Eduardo Cejudo. The final manuscript was written by all authors. All the authors have read and approved the final manuscript.

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Correspondence to Eduardo Cejudo.

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Zapotecas-Tetla, P.J., Ortega-Camacho, D., Estrada-Medina, H. et al. Hydrogeochemical Influence on the Nitrogen and Phosphorus Concentration and Stocks in Herbaceous Karst Wetlands. Wetlands 44, 11 (2024). https://doi.org/10.1007/s13157-023-01764-6

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