Rodrigo Moncayo‐Estrada

Instituto Politécnico Nacional

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Juan Pablo Ramírez-Herrejón

Autonomous University of Queretaro

Gustavo Cruz-Cárdenas

Instituto Politécnico Nacional

Carlos Escalera-Gallardo

Instituto Politécnico Nacional

José De La Cruz‐Agüero

Instituto Politécnico Nacional

Omár Domínguez‐Domínguez

Universidad Michoacana de San Nicolás de Hidalgo

DÁ

Dioselina Álvarez‐Bernal

Instituto Politécnico Nacional

Arely Ramírez‐García

Universidad Michoacana de San Nicolás de Hidalgo

Owen T. Lind

Baylor University

Eduardo F. Balart

Instituto Politécnico Nacional

Javier Caraveo-Patiño

Centro de Investigaciones Biológicas del Noroeste S.C.

Cooperative Institutions

Instituto Politécnico Nacional

Universidad Nacional Autónoma de México

Universidad Autónoma de Baja California Sur

Universidad Michoacana de San Nicolás de Hidalgo

Centro de Investigaciones Biológicas Margarita Salas

Centro de Investigación y Desarrollo

Instituto Canario de Ciencias Marinas

Consejo Superior de Investigaciones Científicas

United States Geological Survey

Weatherford College

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Integral Index of Water Quality: A New Methodological Proposal for Surface Waters

Water (2023)

José Teodoro Silva-García Gustavo Cruz-Cárdenas Rodrigo Moncayo‐Estrada Salvador Ochoa-Estrada Fabián Villalpando-Barragán

A methodology is proposed aimed at defining an integral index of water quality in surface waters that incorporates the information for five variables currently used to independently measure the condition of water in the Cupatítzio River, Michoacán. The variables considered were the current water quality index used by CONAGUA, the concentration of metals, biodiversity as assessed through the BMWP index, microbiological values for Escherichia coli, and the level of toxicity. The index was applied at 17 sites along the Cupatitzio riverbed in the dry season of 2017. Each variable was assigned a rank, which was standardized to a scale of 1–10 and subsequently multiplied by a weight (W) that numerically represented the degree of importance and influence that each factor had in terms of pollution. These factors depended on the anthropic condition of the area, with a value of 5 indicating the method with the most significant impact and 1 the least. The integral index of water quality (IIWQ) was calculated as the arithmetic sum of each factor considered, generating a single value. It had intervals of 15 points minimum to 150 maximum. Five water quality levels were proposed: excellent, good, fair, bad, and very bad. The results showed that, of the 17 sites studied, the majority (ten) were in the fair quality category, ranging from 69 to 95 points; six were in the good category (96 to 122 points); and only one was in the bad category (42–68 points). With the application of this methodology incorporating the information for the five variables already described, it was possible to assess the water quality conditions in the Cupatitzio River as adequate and the water as suitable for its uses in the different socioeconomic activities for which it is destined.

Value (mathematics)

Rank (graph theory)

10.3390/w15071414

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Citations (3)

ANÁLISIS HISTÓRICO DE LA BIOLOGÍA DE LA CHEREHUITA (Hubbsina turneri) (PISCES:GOODEIDAE), ESPECIE ENDÉMICA Y EN PELIGRO DE EXTINCIÓN DE MÉXICO. HISTORICAL ANALYSIS OF THE BIOLOGY OF CHEREHUITA (Hubbsina turneri) (PISCES:GOODEIDAE), ENDEMIC AND THREATENED SPECIES FROM MEXICO.

Rodrigo Moncayo‐Estrada

The present study integrates a historical description of different biological aspects of Hubbsina turneri in the Cuitzeo Lake and the Zacapu Lake in Michoacan. The historical analysis responds to the res- tricted and threatened situation of the species and provides important information to promote conser- vation. Length-weight relationship indicates an isometric growth mainly related to the individuals from the Zacapu Lake. The condition coefficient of fish was greater in Zacapu (3.41) than in Cuitzeo (3.29), aspect that could be related to better development conditions in Zacapu (food and habitat). 25.9 mm standard length was determined as the average size for the first reproduction in females. This species had multiple reproductive cycles and fry born continuously from April to November. Sexual proportion presented dominance from females on males. The stomach content analysis revealed that H. turneri is an epibentophagic to bentophagic carnivorous. Diet presented no significant difference when compa- ring populations from both lakes (MRPP analysis, A = -0.02, p = 0.71). The trophic level classified the species as primary consumer, related to the high detritus consumption. Finally, restoration measures must be implemented in Cuitzeo Lake, principally the wastewater diversion and treatment. In Zacapu Lake, conservation measures must be related to the restriction of spring water extraction to maintain the hydrodynamic ecosystem processes. PALABRAS CLAVE: Reproduccion, alimentacion, Lerma-Chapala, conservacion.

Detritus

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Diet and Trophic Structure of the Fish Community in a Small Sub-Tropical Lake in Central Mexico

Water (2023)

Arely Ramírez‐García Erik Jeppesen Rodrigo Moncayo‐Estrada Norman Mercado‐Silva Omár Domínguez‐Domínguez

Analyses of trophic structure and feeding habits of the fish community can provide information on the complex biotic and abiotic interactions in lake ecosystems. Based on stomach content and δ13C and δ15N stable isotope analyses, we conducted a comprehensive study of the diet of the fish community and its trophic structure in subtropical Lake Zacapu in central Mexico. Overall, there was good agreement between the results based on the diet and the isotope analysis. Fish diets consisted mainly of aquatic macroinvertebrates, which were abundant in the lake. Most species were secondary consumers and trophic generalists across the four sites and two seasons. The food web structure did not differ significantly between the sites or seasons. Our results suggest a low trophic position of native species having a wide spatial trophic niche and niche width. Trophic diet overlap was greater between native species (especially between species from the same family) than between non-native species. Our study provides new information on the trophic interactions in a subtropical lake, rich in endemic species and an important resource for human communities.

Isotope Analysis

10.3390/w15071301

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Adoption of phytodesalination as a sustainable agricultural practice for improving the productivity of saline soils

Environment Development and Sustainability (2020)

Marcos Alfonso Lastiri-Hernández Dioselina Álvarez‐Bernal Rodrigo Moncayo‐Estrada Gustavo Cruz-Cárdenas José Teodoro Silva García

10.1007/s10668-020-00995-5

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Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis

Neotropical Ichthyology (2011)

Rodrigo Moncayo‐Estrada Carlos Escalera-Gallardo Owen T. Lind

This study addresses the influence of water-level fluctuations on fish distribution at two temporal scales: seasonal (dry and rainy) and interannual (low and high volume conditions). The analysis of abundance relationships among three zooplanktivore Chirostoma species at fifteen sites in Lake Chapala, Mexico, revealed the significant influence of contrasting conditions (P=0.0002). Seasonally, segregation was more related to species dominance in the dry season and exclusively related to environmental characteristics in the rainy season. Interanually, biotic influence occurred in the shallowest and the deepest episodes of the lake. Environmental characteristics influenced species distribution when the lake reached 25% of its volume. Site, depth, temperature, and salinity were the leading factors influencing fish distribution. These results emphasize the necessity to implement different management strategies according to lake volume, particularly when a critical threshold is reached.

Dominance (genetics)

Wet season

Dry season

10.1590/s1679-62252011000400012

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Trophic interactions among sympatric zooplanktivorous fish species in volume change conditions in a large, shallow, tropical lake

Neotropical Ichthyology (2011)

Rodrigo Moncayo‐Estrada Owen T. Lind Carlos Escalera-Gallardo

Significant reductions in the water volume of shallow lakes impose a restriction on species segregation promoting more interactions in the trophic relationships. The diets of three closely related zooplanktivorous silversides belonging to the Atherinopsidae species flock of lake Chapala , Mexico, were analyzed at two sites (Chirostoma jordani, C. labarcae, and C. consocium). Diets were described in critical shallow (August 2000) and volume recovery conditions (August 2005). Diets included mainly cladocerans (Bosmina, Ceriodaphnia, and Daphnia) and copepods (Cyclops). A significant difference in diets was detected when comparing years (MRPP analysis, A = 0.22, p < 0.0001) and sites at different years (MRPP analysis, A = 0.17, p = 0.004). According to niche breadth mean values, species were classified as specialized and intermediate feeders. In shallow conditions, the small range of niche breadth (1.72 to 3.64) and high diet overlap values (D = 0.64, L = 8.62) indicated a high potential for interspecific exploitative interaction. When the lake volume recovered, an increase in the niche breadth range (1.04 to 4.96) and low niche overlap values (D = 0.53, L = 2.32) indicated a reduction of the species interaction. The Mann-Whitney U-test supported this pattern by showing a significant difference between years for niche overlap (p = 0.006). The increased interaction during the low volume suggests alternative segregation in life-history variations and other niche dimensions such as spatial or temporal distribution.

Cyclops

Bosmina

Omnivore

10.1590/s1679-62252011005000003

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Citations (12)

Reanalysis of Sea Surface Anomaly Events in the Eastern Pacific Ocean in the First Two Decades of the 21st Century

Héctor Villalobos Buenfil-Ávila Aura Sofía Ortega‐García Ulianov Jakes‐Cota Rodrigo Moncayo‐Estrada

Anomaly (physics)

10.2139/ssrn.4891995

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Biotic Integrity, Water Quality, and Landscape Characteristics of a Subtropical River

Water (2023)

Luis Fernando Gudiño-Sosa Rodrigo Moncayo‐Estrada Martha Alicia Velázquez Machuca Gustavo Cruz-Cárdenas Luís Arturo Ávila Meléndez

The integrity of rivers is affected by anthropogenic activities at different spatial scales, from basin and landscape levels to the direct effects on the river and aquatic life. Our objective was to study these effects on the subtropical La Pasión River, analyzing environmental, geomorphological, habitat and water quality, and macroinvertebrates. We sampled the dry season (March 2022) because the river presented stable conditions. We selected the most influential variables in each spatial scale and determined their relationship with the indexes of quality characteristics and aquatic life in the river using multivariate statistics. Most sites (≈65%) had medium water and suboptimal habitat quality status, meanwhile half the sites had regular biotic integrity status; without finding coincidence in the quality of the different indexes applied, all sites indicated a high gradient of degradation from the origin to the mouth of the river. The presence of some families (e.g., Culicidae, Chironomidae, Lumbriculidae) indicated organic matter contamination. The main variables that significantly classified the river quality and integrity structure were water flow, turbidity, habitat embeddedness, and sulfates (χ2 = 0.1145, p < 0.01). It is concluded that the affected sites received wastewater without prior treatment and presented physical barriers such as irrigation channels.

Turbidity

10.3390/w15091748

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Citations (2)

Historical Delineation of Landscape Units Using Physical Geographic Characteristics and Land Use/Cover Change

Open Geosciences (2018)

Oswaldo Campos-Campos Gustavo Cruz-Cárdenas Roque Juan Carrasco Aquino Rodrigo Moncayo‐Estrada Martha Alicia Velázquez Machuca

Abstract Landscape units are conceived as a part of the territory that share similar physical and geographic characteristics. Their delineation can contribute to identify the physical and social dynamics that emerge in the spatial environment and to propose strategies of planning and management of the territory. The main objective was to make a historical delineation of landscape units in the Duero river basin that demonstrate the dynamics of changes in the territory, the description of the actors involved, and the affectations in the natural and social environment. We analyzed the vegetation change and urban growth from 1983 to 2014, incorporating climatic, edaphic, and topographic variables. A Principal Component Analysis was performed with the information and results were used in Maximum Likelihood procedure to define different clusters based on environmental characteristics. We defined five categories from the Landsat images. Results showed landscape units with homogeneous environmental characteristics and some differences in the units’ delineation were mainly influenced by political and socioeconomic factors. Temporally there was an increased tendency of landscape units, three in 1983, nine in 1990, 1995, 2000 and 2011, and eight in 2014. This increase resulted from territory fragmentation because of berries and avocado cultivars expansion over wooded area.

Edaphic

Land Cover

Fragmentation

Environmental change

10.1515/geo-2018-0004

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Citations (7)

Aplicación del modelo SWAT para evaluar la contaminación por fuentes difusas en la subcuenca del lago de Chapala, México

Revista Internacional de Contaminación Ambiental (2014)

Dinora Bautista-Ávalos Gustavo Cruz-Cárdenas Rodrigo Moncayo‐Estrada José Teodoro Silva-García Francisco Estrada-Godoy

Los modelos de balance hidrologico de cuencas son herramientas que permiten describir procesos dinamicos y predecir, a traves de la simulacion, escenarios del impacto de las actividades productivas de una region. En el presente trabajo se determino el balance hidrico y las cargas de contaminantes por actividades agricolas en la subcuenca del lago de Chapala mediante la herramienta de evaluacion de agua y suelo SWAT (2012). Se configuro el modelo con datos de altimetria, con informacion del tipo de suelo (incorporando los resultados de analisis de laboratorio en cada horizonte) y uso del suelo y vegetacion que se actualizo a 2010 por medio de datos de sensores remotos y con el programa Explorafor, asi como con las bases de datos climaticas obtenidas del programa EricIII-CONAGUA. Se estructuro un concentrado de fertilizantes y plaguicidas que se utilizan en la subcuenca de Chapala derivadas de 550 encuestas que se aplicaron a los productores agricolas. La simulacion con el modelo SWAT se realizo de 1999 a 2001. El balance hidrico resulto negativo por un margen de 300 %. Esto se puede relacionar con que se trata de una subcuenca abierta, ya que el principal afluente es el rio Lerma. En cuanto a los herbicidas, se estima con el modelo una aplicacion promedio anual de 408 g/hade los diferentes principios activos, con una degradacion de 342 g/ha. Para los plaguicidas se obtuvo un valor de 533 g/ha con una degradacion de 532 g/ha. El total de los herbicidas y plaguicidas disueltos fueron del orden de 1.7 g/ha y los adsorbidos por el sedimento de 11 g/ha.

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Citations (5)