<?xml version="1.0" encoding="utf-8"?>

<mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/mads.xsd">
	<authority>
	    <topic authority="Vocabulario General de la Biblioteca Nacional de Maestros">Medio ambiente acuático</topic>
	</authority>

    
            <related type="broader">
        <topic>Medio ambiente</topic>
    </related>
    
    
        <variant type="other">
        <topic>Medio ambiente de agua dulce</topic>
    </variant>
        <variant type="other">
        <topic>Medio ambiente de agua salada</topic>
    </variant>
        <variant type="other">
        <topic>Medio ambiente de los mares</topic>
    </variant>
        <variant type="other">
        <topic>Medio ambiente de ríos y lagos</topic>
    </variant>
    
    	<note type='source' xml:lang="es">Unesco</note>
    
</mads>