Aquatic ecosystems of the Yucatán Peninsula (Mexico), Belize, and Guatemala

• Published in: Hydrobiologia Vol. 661; no. 1; pp. 407 - 433
• Main Authors: Pérez, Liseth, Bugja, Rita, Lorenschat, Julia, Brenner, Mark, Curtis, Jason, Hoelzmann, Philipp, Islebe, Gerald, Scharf, Burkhard, Schwalb, Antje
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01-02-2011; Springer Netherlands; Springer; Springer Nature B.V
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Aquatic ecosystems; Aquatic environment; Biological and medical sciences; Biomedical and Life Sciences; Chemical properties; Conductivity; Ecology; Eutrophic lakes; Eutrophication; Freshwater; Freshwater & Marine Ecology; Fundamental and applied biological sciences. Psychology; General aspects; Geochemistry; Karst; Life Sciences; limnology; Neotropical aquatic ecosystems; Physical and chemical water variables; Primary Research Paper; Principal components analysis; Rivers; Saline water; Saline water intrusion; Sediments; Sinkholes; Surface sediment geochemistry; Surface temperature; Surface water; Synecology; Thermal stratification; Trace elements; Urban development; Water chemistry; Water temperature; Wetlands; Yucatán Peninsula; Zoology; Guatemala; Belize; Central America; America; Yucatan Peninsula; ASW, Guatemala; ASW, Belize; USA, Maine, Cumberland Cty., Highland L; Mexico, Chichancanab L; ASW, Mexico, Yucatan, Celestun; Limnology; Neotropical aquatic ecosystems; Yucatán Peninsula; Surface sediment geochemistry; Physical and chemical water variables; Guatemala; Belize; Tropical zone; Geochemistry; Yucatan Peninsula; Sediments; Yucatan Mexico; Aquatic environment; Hydrobiology; Ecosystem; Neotropical Region
• ISSN: 0018-8158; 1573-5117
• DOI: 10.1007/s10750-010-0552-9

This study presents limnological and morphological characteristics, physical and chemical properties of waters, and geochemistry of surface sediments for 63 aquatic ecosystems located on the karst Yucatán Peninsula and surrounding areas of Belize and the Guatemalan highlands and eastern lowlands. Our principal goal was to classify the aquatic systems based on their water variables. A principal component analysis (PCA) of the surface water chemistry data showed that a large fraction of the variance (29%) in water chemistry is explained by conductivity and major ion concentrations. The broad conductivity range, from 168 to 55,300 μS cm⁻¹ reflects saline water intrusion affecting coastal aquatic environments, and the steep NW-S precipitation gradient, from ~450 to >3,200 mm year⁻¹. Coastal waterbodies Celestún and Laguna Rosada displayed the highest conductivities. Minimum surface water temperatures of 21.6°C were measured in highland lakes, and warmest temperatures, up to 31.7°C, were recorded in the lowland waterbodies. Most lakes showed thermal stratification during the sampling period, with the exception of some shallow (<10 m) systems. Lakes Chichancanab, Milagros, and Bacalar displayed sulfate-rich waters. Waters of sinkholes had relatively high conductivities (<3,670 μS cm⁻¹) and a broad range of δ¹⁸O values (−4.1 to +3.8‰). Ca, HCO₃, and SO₄ dominated the waters of the lowland lakes, whereas Na was the dominant cation in highland lakes. Coastal aquatic ecosystems were dominated by Na and Cl. Cluster analysis based on surface water variables classified aquatic environments of the lowlands and highlands into three groups: (1) lowland lakes, ponds, wetlands, and coastal waterbodies (2) highland lakes, and (3) sinkholes and rivers. A broad trophic state gradient was recorded, ranging from the eutrophic Lake Amatitlán and the Timul sinkhole to oligotrophic Laguna Ayarza, with the highest water transparency (11.4 m). We used major and trace elements in surface sediments to assess pollution of waterbodies. Lakes Amatitlán, Atescatempa, El Rosario, Cayucón, Chacan-Lara, La Misteriosa, rivers Subín and Río Dulce, the wetland Jamolún, and the sinkhole Petén de Monos showed evidence of pollution and urban development. Their surface sediments displayed high concentrations of As, Cu, Fe, Ni, Pb, Se, Zn, and Zr, which suggest moderate to strong pollution.