Preprints
https://doi.org/10.5194/bg-2021-298
https://doi.org/10.5194/bg-2021-298

  24 Nov 2021

24 Nov 2021

Review status: this preprint is currently under review for the journal BG.

Geodiversity primarily shapes large-scale limnology and aquatic species distribution in the northern Neotropics

Laura Anahí Macario-González1,2, Sergio Cohuo2,3, Philipp Hoelzmann4, Liseth Pérez2, Manuel Elías-Gutiérrez5, Margarita Caballero6, Alexis Oliva7, Margarita Palmieri8, María Reneé Álvarez8, and Antje Schwalb2 Laura Anahí Macario-González et al.
  • 1Tecnológico Nacional de México/I. T. de la Zona Maya. Carretera Chetumal-Escárcega Km 21.5, ejido Juan Sarabia, 77965 Quintana Roo, México
  • 2Institut für Geosysteme und Bioindikation, Technische Universität Braunschweig, Langer Kamp 19c, 38106 Braunschweig, Germany
  • 3Tecnológico Nacional de México/I. T. de Chetumal. Av. Insurgentes 330, Chetumal, 77013 Quintana Roo, México
  • 4Institut für Geographische Wissenschaften, Freie Universität Berlin, Malteserstrasse 74-100, 12249 Berlin, Germany
  • 5El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal, Av. Centenario km 5.5, Chetumal, 77014 Quintana Roo, México
  • 6Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
  • 7Asociación de municipios del lago de Yojoa y su Área de influencia (Amuprolago), Aldea Monte Verde, Santa Cruz de Yojoa, Cortés, 21000 Honduras
  • 8Departamento de Biología. Universidad del Valle de Guatemala, 01015 Guatemala, Guatemala

Abstract. Geodiversity is recognized as one of the most important drivers of ecosystems characteristics and biodiversity globally. However, in the northern Neotropics, the contribution of highly diverse landscapes and geological history in structuring large-scale patterns of limnology and aquatic species associations remain poorly understood. We evaluate the interaction between geodiversity, limnology and freshwater ostracode assemblages to explore drivers of aquatic ecosystem structure from southern Mexico to Nicaragua. Cluster analysis based on geological, limnological, sedimentological and mineralogical characteristics of 76 aquatic ecosystems (karst, volcanic, tectonic) reveal two main limnological regions: (1) Karst terraces from the Yucatán Peninsula and northern Guatemala, and (2) volcanic terrains of the Guatemalan highlands, El Salvador and Honduras mid-elevations, and Nicaraguan lowlands. In addition, seven limnological subregions were recognized, attesting high limnological heterogeneity. Principal Component Analysis identifies water ionic and sediment composition as most influential for aquatic ecosystem classification and given their source of formation, we recognized geology as the fundamental determinant for large-scale limnological patterns. Multiparametric analyses based on biological data revealed that species association represent disjunct faunas. For instance, five species associations are closely related to limnological regions. Structural equation modelling reveals a strong influence of limnology and elevation on the biological composition, but geodiversity resulted in the most important driver. The confinement of species associations is attributed to regional lake geochemistry. We deduce a linear, continuous and primary influence of geodiversity for limnological structure, geochemical properties and aquatic biological composition in Lakes of the northern Neotropical region.

Laura Anahí Macario-González et al.

Status: open (until 05 Jan 2022)

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  • RC1: 'Comment on bg-2021-298', Anonymous Referee #1, 02 Dec 2021 reply

Laura Anahí Macario-González et al.

Laura Anahí Macario-González et al.

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Short summary
We evaluate the interactions between geodiversity, limnology, and aquatic species from southern Mexico to Nicaragua. Geological, limnological, sedimentological and mineralogical characteristics of 76 systems reveal two main limnological regions and seven subregions. Water ionic and sediment composition are the most influential. Species association are disjunct faunas related to limnological regions. We deduce a linear influence of geodiversity for limnology, and biological composition.
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