<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-9753</journal-id>
<journal-title><![CDATA[RIIIT. Revista internacional de investigación e innovación tecnológica]]></journal-title>
<abbrev-journal-title><![CDATA[RIIIT. Rev. int. investig. innov. tecnol.]]></abbrev-journal-title>
<issn>2007-9753</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Coahuila]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-97532019000600003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de la contaminación por metales pesados en suelos de la Reserva Ecológica de Manglares Cayapas Mataje (REMACAM)-Ecuador]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of contamination by heavy metals in soils of the Cayapas Mataje Mangrove Reserve (REMACAM)-Ecuador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muyulema-Allaica]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canga-Castillo]]></surname>
<given-names><![CDATA[S.M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pucha-Medina]]></surname>
<given-names><![CDATA[P.M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Ruiz]]></surname>
<given-names><![CDATA[C.G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontificia Universidad Católica del Ecuador Escuela de Diseño Industrial ]]></institution>
<addr-line><![CDATA[Ambato Tungurahua]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,San Lorenzo  ]]></institution>
<addr-line><![CDATA[San Lorenzo Esmeraldas]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cantabria Dpto. Administración de Empresas ]]></institution>
<addr-line><![CDATA[Santander Cantabria]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Estatal de Bolívar Facultad de Ciencias Administrativas, Gestión Empresarial e Informática ]]></institution>
<addr-line><![CDATA[Guaranda Bolívar]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Grupo Consultor Empresarial CAAPTES  ]]></institution>
<addr-line><![CDATA[Riobamba Chimborazo]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>7</volume>
<numero>41</numero>
<fpage>40</fpage>
<lpage>61</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-97532019000600003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-97532019000600003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-97532019000600003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En la actualidad, los ecosistemas están expuestos a contaminantes metálicos provenientes de las actividades propias del desarrollo humano, cuyas zonas protegidas no se encuentran aisladas de dicha problemática. Los suelos pueden actuar como captadores y facilitar la liberación de metales hacia los organismos que tienen contacto sobre él, pudiendo generar problemas de biomagnificación sobre la cadena trófica. Ante esta situación, el presente estudio evalúa la contaminación por metales pesados en suelos de la Reserva Ecológica Manglares Cayapas Mataje (REMACAM) mediante la aplicación de índices de polución, basándose en concentraciones analizadas de suelo propias de la reserva y valores de concentraciones de fondo. Los índices aplicados fueron Igeo, EF y PLI. Se determinó que el elemento con mayores valores de contaminación es el Cadmio (Cd). El estudio concluye poniendo de manifiesto la necesidad de adoptar cambios sustanciales en los usos y prácticas agrícolas, y de reformar la normativa legal y los programas de manejo con el fin de suministrar de una manera integrada e integradora, los lineamientos básicos de acción para la conservación del patrimonio natural y cultural, la provisión de servicios ecosistémicos y culturales que contribuyen a la sostenibilidad del área, al buen vivir de sus poblaciones locales y a fortalecer la gestión del área protegida.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Currently, ecosystems are exposed to metal pollutants from human development activities, whose protected areas are not isolated from this problem. The soils can act as collectors and facilitate the release of metals to organisms that have contact on it, and it can generate biomagnification problems on the trophic chain. Given this situation, the present study evaluates heavy metal contamination in soils of the Mangrove Cayapas Mataje Ecological Mangrove Reserve (REMACAM) through the application of pollution indices, based on analyzed soil concentrations of the reserve and background concentration values. The indices applied were: Igeo, EF and PLI. It was determined that the element with the highest contamination values is Cadmium (Cd). The study concludes by highlighting the need to adopt substantial changes in agricultural uses and practices, and to reform legal regulations and management programs in order to provide, in an integrated and inclusive manner, the basic guidelines for conservation action Natural and cultural heritage, the provision of ecosystem and cultural services that contribute to the sustainability of the area, the good living of its local populations and strengthen the management of the protected area.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Soil]]></kwd>
<kwd lng="en"><![CDATA[Mangrove Cayapas Mataje Ecological Mangrove Reserve]]></kwd>
<kwd lng="en"><![CDATA[Igeo]]></kwd>
<kwd lng="en"><![CDATA[EF]]></kwd>
<kwd lng="en"><![CDATA[PLI]]></kwd>
<kwd lng="es"><![CDATA[Suelo]]></kwd>
<kwd lng="es"><![CDATA[Reserva Ecológica Manglares Cayapas Mataje]]></kwd>
<kwd lng="es"><![CDATA[Igeo]]></kwd>
<kwd lng="es"><![CDATA[EF]]></kwd>
<kwd lng="es"><![CDATA[PLI]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayala-Armijos]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Rodríguez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Quezada-Abad]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Ochoa]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cortéz-Suarez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cuantificación de metales pesados (Hg, As, Pb y Cr) en organismos acuáticos: cangrejo rojo (Ucides occidentalis)]]></article-title>
<source><![CDATA[Revista Ciencia UNEMI]]></source>
<year>2015</year>
<volume>8</volume>
<numero>16</numero>
<issue>16</issue>
<page-range>54-60</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Banguero-Camacho]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Giraldo-Díaz]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mangrove Economy: etho-politics and social change]]></article-title>
<source><![CDATA[Entramado]]></source>
<year>2018</year>
<volume>14</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>104-10</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barbieri]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Importance of Enrichment Factor (EF) and Geoaccumulation Index(Igeo) to Evaluate the Soil Contamination]]></article-title>
<source><![CDATA[Geology &amp; Geophysics]]></source>
<year>2016</year>
<volume>5</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-4</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Campuzano]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Goguitchaichvili]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Índices de sorción de metales pesados en suelos urbanos: el caso de Morelia, Michoacán]]></article-title>
<source><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></source>
<year>2017</year>
<volume>69</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>433-45</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brenner]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The impacts of Public Policies on Mangroves in Chiapas, Mexico: A Consequence of Lacking Environmental Policy Integration]]></article-title>
<source><![CDATA[Gestión y Política Pública]]></source>
<year>2018</year>
<volume>27</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>237-67</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Builes-Cadavid]]></surname>
<given-names><![CDATA[C. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Garcés-Giraldo]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Saldarriaga]]></surname>
<given-names><![CDATA[L. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Antecedentes de la ecosofía]]></article-title>
<source><![CDATA[Producción + Limpia]]></source>
<year>2018</year>
<volume>13</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>120-5</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Assessment of heavy metals contamination in sediments and soils of Biological Reserve Limoncocha - Ecuador by pollution indices]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Santander ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Cantabria, ETS de Ingenieros Industriales y de Telecomunicación]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cáceres]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[O. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Valdez]]></surname>
<given-names><![CDATA[S. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Choque]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Choque]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[S. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Bhattacharya]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fractionation of heavy metals and assessmentof contamination of the sediments of Lake Titicaca]]></article-title>
<source><![CDATA[Environmental Monitoring and Assessment]]></source>
<year>2013</year>
<volume>185</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>9979-94</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Valdés]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Concentración de metales pesados (Cu, Ni, Zn, Cd, Pb) en la biota y sedimentos de una playa artificial, en la bahía San Jorge 23°S, norte de Chile]]></article-title>
<source><![CDATA[Latin american journal of aquatic research]]></source>
<year>2012</year>
<volume>40</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>267-81</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Columba]]></surname>
<given-names><![CDATA[Z. K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual para la Gestión Operativa de las Áreas Protegidas de Ecuador]]></source>
<year>2013</year>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[FLACSO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cuesta]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Peralvo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Baquero]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Bustamante]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Merino]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Muriel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Áreas prioritarias para la conservación del Ecuador continental]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[Ministerio de Ambiente]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El-Amier]]></surname>
<given-names><![CDATA[Y. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Alghanem]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Alzuaibr]]></surname>
<given-names><![CDATA[F. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioaccumulation and Translocation of Heavy Metals from Coastal Soil by Wild Halophytes]]></article-title>
<source><![CDATA[American Journal of Environmental Protection]]></source>
<year>2017</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>52-60</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[T asa de crecimiento de Anadara tuberculosa (Sowerby, 1833) (Bivalvia: Arcidae) en la reserva ecológica manglares Cayapas-Mataje (REMACAM): Un análisis basado en sistemas de cajas suspendidas]]></article-title>
<source><![CDATA[Revista Ciencias del Mar y Limnología]]></source>
<year>2010</year>
<volume>4</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>89-98</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fu]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Q.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Removal of heavy metal ions from wastewaters: A review]]></article-title>
<source><![CDATA[Journal of Environmental Management]]></source>
<year>2011</year>
<volume>92</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>407-18</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Gallego]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Naranjo]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Atlas socioambiental de las cuencas transfronterizas Mira y Mataje: aportes para su ordenamiento y gestión integral Colombia - Ecuador]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Cali ]]></publisher-loc>
<publisher-name><![CDATA[WWF-Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Valle]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Nirchio]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Olivero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Tejeda]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Valdelamar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación del riesgo de contaminación por metales pesados (Hg y Pb) en sedimentos marinos del Estero Huaylá, Puerto Bolívar, Ecuador]]></article-title>
<source><![CDATA[Revista del Instituto de Investigación FIGMMG-UNMSM]]></source>
<year>2017</year>
<volume>21</volume>
<numero>41</numero>
<issue>41</issue>
<page-range>75-82</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Salazar]]></surname>
<given-names><![CDATA[I. G.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Herrera]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Monks]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pulido-Flores]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Presencia de metalespesados en la Reserva de la Biosfera Barranca de Metztitlán, Hidalgo, México]]></article-title>
<source><![CDATA[Estudios en Biodiversidad]]></source>
<year>2015</year>
<numero>13</numero>
<issue>13</issue>
<page-range>1-5</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hamilton]]></surname>
<given-names><![CDATA[S. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Lovette]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Borbor-Cordova]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Millones]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Carbon Holdings of Northern Ecuador's Mangrove Forests]]></article-title>
<source><![CDATA[Annals of the American Association of Geographers]]></source>
<year>2017</year>
<volume>107</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>54-71</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[B. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Conde]]></surname>
<given-names><![CDATA[B. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Martín]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Niveles de fondo geoquímico e influencia del marco geológico en las concentraciones edafogeoquímicas de base de suelos seleccionados de Castilla-La Mancha]]></article-title>
<source><![CDATA[Estudios Geológicos]]></source>
<year>2010</year>
<volume>66</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>123-30</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Birch]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pollution and health risk of potentially toxic metals in urban road dust in Nanjing, a mega-city of China]]></article-title>
<source><![CDATA[Science of the Total Environment]]></source>
<year>2014</year>
<numero>476-477</numero>
<issue>476-477</issue>
<page-range>522-31</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Londoño-Franco]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Londoño-Muñoz]]></surname>
<given-names><![CDATA[P. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Muñoz-García]]></surname>
<given-names><![CDATA[F. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los riesgos de los metales pesados en la salud humana y animal]]></article-title>
<source><![CDATA[Biotecnología en el Sector Agropecuario y Agroindustrial]]></source>
<year>2016</year>
<volume>14</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>145-53</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lorente]]></surname>
<given-names><![CDATA[J. I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La gestión informativa del riesgo medioambiental]]></article-title>
<source><![CDATA[CIC - Cuadernos de Información y Comunicación]]></source>
<year>2014</year>
<numero>19</numero>
<issue>19</issue>
<page-range>179-94</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Luzuriaga]]></surname>
<given-names><![CDATA[V. d.]]></given-names>
</name>
<name>
<surname><![CDATA[Solano]]></surname>
<given-names><![CDATA[C. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Cevallos]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioecología de huevos y larvas de peces Cetengraulis mysticetus (Chuhueco), Opisthonema sp. (Pinchagua) y Anchoas en la reserva ecológica manglares Cayapas-Mataje - Ecuador]]></article-title>
<source><![CDATA[Acta Oceanográfica del Pacífico]]></source>
<year>2007</year>
<volume>14</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>101-14</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="book">
<collab>MAE (Ministerio del Ambiente del Ecuador)</collab>
<source><![CDATA[Ficha Informativa de los Humedales de Ramsar (FIR) Sitio Ramsar Reserva Ecológica Cayapas Mataje]]></source>
<year>2009</year>
<publisher-loc><![CDATA[Guayaquil ]]></publisher-loc>
<publisher-name><![CDATA[MAE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="book">
<collab>MAE (Ministerio del Ambiente del Ecuador)</collab>
<source><![CDATA[Plan de Manejo de la Reserva Ecológica Manglares Cayapas Mataje]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Guayaquil ]]></publisher-loc>
<publisher-name><![CDATA[MAE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="book">
<collab>MAE (Ministerio del Ambiente del Ecuador)</collab>
<source><![CDATA[Quinto Informe Nacional para el Convenio sobre la Diversidad Biológica]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[MAE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="book">
<collab>MAE (Ministerio del Ambiente del Ecuador)</collab>
<source><![CDATA[Estrategia Nacional de Biodiversidad 2015-2030]]></source>
<year>2016</year>
<edition>primera</edition>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[Ministerio del Ambiente del Ecuador]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marín]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzalez]]></surname>
<given-names><![CDATA[V. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Lapo]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Lemus]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Niveles de mercurio en sedimentos de la zona costera de El Oro, Ecuador]]></article-title>
<source><![CDATA[Gayana (Concepción)]]></source>
<year>2016</year>
<volume>80</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>147-53</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio comparativo de los sitios Ramsar en el Ecuador como oferta turística del Patrimonio Natural del Ecuador]]></article-title>
<source><![CDATA[RICIT]]></source>
<year>2012</year>
<volume>3</volume>
<page-range>45-81</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muyulema]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La ecología industrial y la economía circular. Retos actuales al desarrollo de industrias básicas en el Ecuador]]></article-title>
<source><![CDATA[Dilemas Contemporáneos: Educación, Política y Valores]]></source>
<year>2018</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>101-20</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ochoa-Hueso]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El ciclo del nitrógeno y el hombre: De lo esencial a lo excesivo]]></article-title>
<source><![CDATA[Revista Ecosistemas]]></source>
<year>2017</year>
<volume>26</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-3</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Oluwagbenga]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Tunde]]></surname>
<given-names><![CDATA[O. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Funsho]]></surname>
<given-names><![CDATA[A. I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Study of Heavy Metals Pollution in the Coastal Marine Sediment of Ondo State, Nigeria]]></article-title>
<source><![CDATA[Current Journal of Applied Science and Technology]]></source>
<year>2019</year>
<volume>34</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-10</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortiz-T]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Conflictos socioambientales o los escenarios urgentes para las ciencias sociales ecuatorianas en el Siglo XXI]]></article-title>
<source><![CDATA[Universitas. Revista de Ciencias Sociales y Humanas]]></source>
<year>2011</year>
<volume>14</volume>
<page-range>191-207</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pejman]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bidhendi]]></surname>
<given-names><![CDATA[G. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ardestani]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Saeedi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Baghvand]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A new index for assessing heavy metals contamination in sediments: A case study]]></article-title>
<source><![CDATA[Ecological Indicators]]></source>
<year>2015</year>
<volume>58</volume>
<page-range>365-73</page-range></nlm-citation>
</ref>
<ref id="B35">
<label>35</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[C. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Amado]]></surname>
<given-names><![CDATA[Á. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Segovia]]></surname>
<given-names><![CDATA[O. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Conesa]]></surname>
<given-names><![CDATA[G. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Alarcón]]></surname>
<given-names><![CDATA[C. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La degradación ambiental y sus efectos en la contaminación de las aguas superficiales en la cuenca del río Conchos (Chihuahua - México)]]></article-title>
<source><![CDATA[Cuadernos GeográFicos]]></source>
<year>2019</year>
<volume>58</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>47-67</page-range></nlm-citation>
</ref>
<ref id="B36">
<label>36</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pernía]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Mero]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cornejo]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Zambrano]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinación de cadmio y plomo en agua, sedimento y organismos bioindicadores en el Estero Salado, Ecuador]]></article-title>
<source><![CDATA[Enfoque UTE]]></source>
<year>2018</year>
<volume>9</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>98-105</page-range></nlm-citation>
</ref>
<ref id="B37">
<label>37</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Querol-Suñé]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Composición de los sedimentos de la cuenca del río Sonora y valores de fondo]]></article-title>
<source><![CDATA[Revista Latino-Americana de Hidrogeología]]></source>
<year>2019</year>
<volume>1</volume>
<numero>Especial</numero>
<issue>Especial</issue>
<page-range>63-77</page-range></nlm-citation>
</ref>
<ref id="B38">
<label>38</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[A. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La enseñanza de la química ambiental: una propuesta fundamentada en la controversia científica y la resolución de problemas]]></article-title>
<source><![CDATA[Revista de la Facultad de Ciencia y Tecnología -Tecné, Episteme y Didaxis]]></source>
<year>2015</year>
<numero>38</numero>
<issue>38</issue>
<page-range>133-46</page-range></nlm-citation>
</ref>
<ref id="B39">
<label>39</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rees]]></surname>
<given-names><![CDATA[H. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hyland]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hyland]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Mercer]]></surname>
<given-names><![CDATA[C. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Roff]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ware]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Environmental indicators: utility in meeting regulatory needs. An overview]]></article-title>
<source><![CDATA[ICES Journal of Marine Science]]></source>
<year>2008</year>
<volume>65</volume>
<page-range>1381-6</page-range></nlm-citation>
</ref>
<ref id="B40">
<label>40</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[C. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguirre]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Chiriboga]]></surname>
<given-names><![CDATA[C. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La gestión ambiental empresarial, su función frente a los cambios climáticos globales. Camaroneras, caso: manglares de Ecuador]]></article-title>
<source><![CDATA[Universidad y Sociedad]]></source>
<year>2016</year>
<volume>8</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>43-50</page-range></nlm-citation>
</ref>
<ref id="B41">
<label>41</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[H. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Intoxicación ocupacional por metales pesados]]></article-title>
<source><![CDATA[MEDISAN]]></source>
<year>2017</year>
<volume>21</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>7003-16</page-range></nlm-citation>
</ref>
<ref id="B42">
<label>42</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez-Jorquera]]></surname>
<given-names><![CDATA[I. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Siroski]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Espejo]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Nimptsch]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Choueri]]></surname>
<given-names><![CDATA[P. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Choueri]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Toor]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Latin American protected areas: Protected from chemical pollution?]]></article-title>
<source><![CDATA[Integrated Environmental Assessment and Management]]></source>
<year>2017</year>
<volume>13</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>360-70</page-range></nlm-citation>
</ref>
<ref id="B43">
<label>43</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Romero-Berny]]></surname>
<given-names><![CDATA[E. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Tovilla-Hernández]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Torrescano-Valle]]></surname>
</name>
<name>
<surname><![CDATA[Schmoo]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heterogeneidad estructural del manglar como respuesta a factores ambientales y antrópicos en el Soconusco, Chiapas, México]]></article-title>
<source><![CDATA[Polibotánica]]></source>
<year>2019</year>
<volume>47</volume>
<page-range>39-58</page-range></nlm-citation>
</ref>
<ref id="B44">
<label>44</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rueda]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Madriñán]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Metodologías para establecer valores de referencia de metales pesados en suelos agrícolas: Perspectivas para Colombia]]></article-title>
<source><![CDATA[Acta Agronómica]]></source>
<year>2011</year>
<volume>60</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>203-18</page-range></nlm-citation>
</ref>
<ref id="B45">
<label>45</label><nlm-citation citation-type="book">
<collab>Senplades (Secretaría Nacional de Planificación y Desarrollo)</collab>
<source><![CDATA[Agenda Zonal: Zona 1-Norte. Provincia Esmeraldas, Imbabura, Carchi, Sucumbios: 2013-2017]]></source>
<year>2013</year>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[Senplades]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B46">
<label>46</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soleimani]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Taghavi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ghaemy]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Synthesis, Characterization and Heavy Metal Ion Adsorption Behavior of Imidazole-Based Novel Polyamides and Polyimides]]></article-title>
<source><![CDATA[Journal of the Mexican Chemical Society]]></source>
<year>2017</year>
<volume>61</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>229-40</page-range></nlm-citation>
</ref>
<ref id="B47">
<label>47</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thanh-Nho]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Marchand]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Strady]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Huu-Phat]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Nhu-Trang]]></surname>
<given-names><![CDATA[T.-T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioaccumulation of some trace elements in tropical mangrove plants and snails (Can Gio, Vietnam)]]></article-title>
<source><![CDATA[Environmental Pollution]]></source>
<year>2019</year>
<volume>248</volume>
<page-range>635-45</page-range></nlm-citation>
</ref>
<ref id="B48">
<label>48</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tobar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Muñoz]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fermín]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Senior]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Concentración de Metales Pesados en Bivalvos anadara tuberculosa y a. Similis del Estero huaylá, Provincia de el Oro, Ecuador]]></article-title>
<source><![CDATA[Boletín del Centro de Investigaciones Biológicas]]></source>
<year>2017</year>
<volume>51</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>19-30</page-range></nlm-citation>
</ref>
<ref id="B49">
<label>49</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Toriz-Robles]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Guzmán]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández-Ordoñez]]></surname>
<given-names><![CDATA[Y. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Soria-Ruiz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ybarra]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of linear and nonlinear models to estimate the risk of soil contamination]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2019</year>
<volume>53</volume>
<page-range>269-83</page-range></nlm-citation>
</ref>
<ref id="B50">
<label>50</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Turekian]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Wedepohl]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribution of the Elements in Some Major Units of the Earth's Crust]]></article-title>
<source><![CDATA[Geological Society of America Bulletin]]></source>
<year>1961</year>
<numero>72</numero>
<issue>72</issue>
<page-range>175-92</page-range></nlm-citation>
</ref>
<ref id="B51">
<label>51</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ubeid]]></surname>
<given-names><![CDATA[K. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Al-Agha]]></surname>
<given-names><![CDATA[M. R.]]></given-names>
</name>
<name>
<surname><![CDATA[El-Turk]]></surname>
<given-names><![CDATA[M. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heavy Metals Distribution and Pollution in the Sediments of the Wadi Gaza Mouth, Eastern Mediterranean Coast, Palestine]]></article-title>
<source><![CDATA[Serie Correlación Geológica]]></source>
<year>2018</year>
<volume>34</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>71-88</page-range></nlm-citation>
</ref>
<ref id="B52">
<label>52</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zafra-Mejía]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Rondón-Quintana]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez-Malaxechebarria]]></surname>
<given-names><![CDATA[Á.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heavy metal contribution by runoff in a high-altitude megacity: a method based on the road-deposited sediment characterization]]></article-title>
<source><![CDATA[DYNA]]></source>
<year>2018</year>
<volume>85</volume>
<numero>206</numero>
<issue>206</issue>
<page-range>85-94</page-range></nlm-citation>
</ref>
<ref id="B53">
<label>53</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zambrano]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Meiners]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Notas sobre taxonomía, biología y pesquería de Ucides occidentalis (Brachyura: Ocypodidae) con énfasis en el Golfo de Guayaquil, Ecuador]]></article-title>
<source><![CDATA[Revista Peruana De Biología]]></source>
<year>2018</year>
<volume>25</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>055-66</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
