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      El karst de Yucatán: su origen, morfología y biología Translated title: The karst of Yucatan: its origin, morphology and biology

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          Abstract

          Resumen El karst del estado de Yucatán, México, tiene su origen en los arrecifes coralinos y sedimentos marinos que, al exponerse a la superficie, formaron la roca caliza. Los procesos de solubilización-precipitación de esta roca han promovido la ausencia de corrientes de agua superficiales, un relieve ligeramente ondulado con planicies, depresiones y montículos, afloramientos y presencia de cenotes. Los diferentes grados de porosidad y dureza de la roca han permitido la formación desde pequeñas oquedades y acumulaciones de suelo, hasta complejos sistemas de cuevas secas y húmedas. El manejo de este tipo de áreas debe partir del conocimiento de su origen, morfología y biología para garantizar el uso sustentable de los recursos naturales. Se requiere especial atención en el manejo de la extracción de roca caliza, las actividades turísticas y productivas relacionadas con el uso de agua del acuífero, así como el volumen y calidad de las descargas de aguas residuales al suelo, cenotes y el mar.

          Translated abstract

          Abstract The karstic environment of the state of Yucatán, México has its origin on the coral reefs and marine sediments that, after being exposed to surface conditions, formed limestone. Solubility and precipitation processes of this rock have promoted the absence of surface water currents, a slightly undulated relief with plains, depressions and mounds, fractured outcrops and presence of sinkholes. The different levels of porosity and hardness of the rock have allowed the formation of small hollows, soil pockets hollows, as well as complex systems of dry and wet caves. The management of this kind of areas must consider its origin, morphology and biology to guarantee the sustainable use of the natural resources. Special attention needs to be paid on the management of the extraction of limestone rocks, the touristic and productive activities related to the use of water from the aquifer, as well as the volume and quality of the water discharges to soil and sinkholes.

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          Review: The Yucatán Peninsula karst aquifer, Mexico

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            The Hydrogeochemistry of the Karst Aquifer System of the Northern Yucatan Peninsula, Mexico

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              Adaptive and nonadaptive genome size evolution in Karst endemic flora of China.

              Genome size variation is of fundamental biological importance and has been a longstanding puzzle in evolutionary biology. Several hypotheses for genome size evolution including neutral, maladaptive, and adaptive models have been proposed, but the relative importance of these models remains controversial. Primulina is a genus that is highly diversified in the Karst region of southern China, where genome size variation and the underlying evolutionary mechanisms are poorly understood. We reconstructed the phylogeny of Primulina using DNA sequences for 104 species and determined the genome sizes of 101 species. We examined the phylogenetic signal in genome size variation, and tested the fit to different evolutionary models and for correlations with variation in latitude and specific leaf area (SLA). The results showed that genome size, SLA and latitudinal variation all displayed strong phylogenetic signals, but were best explained by different evolutionary models. Furthermore, significant positive relationships were detected between genome size and SLA and between genome size and latitude. Our study is the first to investigate genome size evolution on such a comprehensive scale and in the Karst region flora. We conclude that genome size in Primulina is phylogenetically conserved but its variation among species is a combined outcome of both neutral and adaptive evolution. © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.
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                Author and article information

                Journal
                au
                Acta universitaria
                Acta univ
                Universidad de Guanajuato, Dirección de Investigación y Posgrado (México, Guanajuato, Mexico )
                0188-6266
                2007-9621
                2019
                : 29
                : e2292
                Affiliations
                [2] Yucatán orgnameUniversidad Autónoma de Yucatán orgdiv1Campus de Ciencias Biológicas y Agropecuarias orgdiv2Departamento de Ecología Mexico
                [1] Mérida Yucatán orgnameUniversidad Autónoma de Yucatán orgdiv1Campus de Ciencias Biológicas y Agropecuarias orgdiv2Departamento de manejo y conservación de recursos naturales tropicales Mexico
                Article
                S0188-62662019000100211 S0188-6266(19)02900000211
                10.15174/au.2019.2292
                866abb42-b578-49ba-984d-c9aa1e2ed4f6

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 13 September 2019
                : 24 May 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 125, Pages: 0
                Product

                SciELO Mexico

                Categories
                Artículos

                cenotes,Karstic landscape,roca calcárea,sinkholes,limestone,Paisaje kárstico,calcareous rock,carbonato de calcio,calcium carbonate,roca caliza

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