Nutrients retention in a small subtropical wetland (México)

  • Martha B. Rendón-López | mbeatrizrl@hotmail.com University Michoacana of San Nicolas de Hidalgo, Mexico.
  • M. Luisa Suarez Alonso University of Murcia, Spain.
  • Gloria L. Ayala-Ramirez University Michoacana of San Nicolas de Hidalgo, Mexico.
  • Yazmin Hernández-Linares University Michoacana of San Nicolas de Hidalgo, Mexico.
  • Alberto Gómez-Tagle Chavez University Michoacana of San Nicolas de Hidalgo, Mexico.
  • Julio C. Medina-Avila University Michoacana of San Nicolas de Hidalgo, Mexico.
  • M. Rosario Vidal-Abarca University of Murcia, Spain.

Abstract

In tropical areas very few studies have analysed wetlands’ ability to control nutrients. We analysed the efficiency of the Pátzcuaro subtropical wetland in Mexico to retain nutrients (total phosphorus: TP; soluble reactive phosphorus: PO43-, nitrite: NO2- and nitrate: NO3-) and total suspended solids (TSS) and its temporal variability from November 2011 to October 2012, where two hydrological different periods (dry and wet periods) were included. The results indicate that, annually, this wetland reduced TP, 30.4%; PO43-, 19.2%; NO2-, 2.5%; NO3-, 17.6%; and TSS, 14.7%. However, the reduction % rose to 55.3% for TP and to 47.3% for PO43- during the dry period and to 14.1 % for NO2-, 49% for NO3- and 44.5% for TSS during the rainy period. These results show dependence on the hydrological cycle, although P retention is also related with uptake by a dense macrophyte community and with organic matter accumulation. The results obtained suggest that removal of N is due mainly to denitrification. TSS retention seems to respond to low speed hydraulics and the resistance generated by macrophytes roots and floating plants. Like other studies in temperate environments, this wetland seems to remove more efficiently P than N. Unlike that  in temperate environments where the highest nutrient retention occurs in autumn, we found the highest retention values for both NO2- and NO3- during summer (rainy period), and the lowest for P, probably due to release of P for the senescence of wetland plants during this period.   

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Published
2016-03-22
Info
Issue
Section
6th National Congress of Limnology
Supporting Agencies
National Commission of Biodiversity (CONABIO), Mexico
Keywords:
Nitrates, phosphates, total phosphorus, organic matter, hydrological periods, Pátzcuaro wetland.
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How to Cite
1.
Rendón-López MB, Suarez Alonso ML, Ayala-Ramirez GL, Hernández-Linares Y, Gómez-Tagle Chavez A, Medina-Avila JC, Vidal-Abarca MR. Nutrients retention in a small subtropical wetland (México). J Limnol [Internet]. 2016Mar.22 [cited 2021May17];75(s1). Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2016.1363