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Jorge Alfredo Herrera Silveira
Recursos del Mar, Cinvestav del IPN—Unidad Mérida Km 6 antigua carretera a Progreso Mérida Yucatán 97310 Mexico

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Research paper
Published: 05 May 2021 in Groundwater
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High surface water‐groundwater connectivity characterizes watersheds underlain by karsts, increasing contaminant transport risks. However, karsts are highly complex, making research necessary to understand the transport of contaminants from the surface, through the aquifer, to discharge areas. In Yucatan, the lack of wastewater treatment raises the risk of groundwater contamination. We monitored stable isotopes (δ18O‐NO3 and δ15N‐NO3), cadmium, and lead to document wastewater contamination and transport during the rainy and dry seasons, using water samples collected along the Ring of Cenotes during each season. Specific conductance and pH showed no consistent seasonality, with conductance ranging from 0.5 to 55 mS/cm and pH ranging from 6.6 to 8.6 for most samples. Nitrate concentrations in the cenotes averaged 205±260 μM and no seasonal pattern was observed. Cd and Pb concentrations were 0.1 – 37.9 μg/L and 0.2 – 243.2 μg/L, respectively. Nitrate stable isotope values were 2.6 – 27.2‰ for δ18O and 1.2 – 20.7‰ for δ15N. The statistical relationship between δ15N and δ18O, in dry season samples, indicated that denitrification was occurring. A scale measure for wastewater recognition showed: 1) high variability among sites probably related with dry/rainy seasons and/or diverse anthropogenic activities; and 2) specific water quality variables that contribute to contamination at each site during each season. Importantly, our analyses indicate that in the area surrounding the ring of cenotes, wastewater exhibits spatial and temporal patterns related to complex transport and dilution processes, as is the case in karsts in general.

ACS Style

F. Arcega‐Cabrera; J. O. Sickman; L. Fargher; J. Herrera‐Silveira; D. Lucero; I. Oceguera‐Vargas; E. Lamas‐Cosío; P. A. Robledo‐Ardila. Groundwater Quality in the Yucatan Peninsula: Insights from Stable Isotope and Metals Analysis. Groundwater 2021, 1 .

AMA Style

F. Arcega‐Cabrera, J. O. Sickman, L. Fargher, J. Herrera‐Silveira, D. Lucero, I. Oceguera‐Vargas, E. Lamas‐Cosío, P. A. Robledo‐Ardila. Groundwater Quality in the Yucatan Peninsula: Insights from Stable Isotope and Metals Analysis. Groundwater. 2021; ():1.

Chicago/Turabian Style

F. Arcega‐Cabrera; J. O. Sickman; L. Fargher; J. Herrera‐Silveira; D. Lucero; I. Oceguera‐Vargas; E. Lamas‐Cosío; P. A. Robledo‐Ardila. 2021. "Groundwater Quality in the Yucatan Peninsula: Insights from Stable Isotope and Metals Analysis." Groundwater , no. : 1.

Journal article
Published: 21 April 2021 in Sustainability
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The pigment content in leaves has commonly been used to characterize vegetation condition. However, few studies have assessed temporal changes of local biotic and abiotic factors on leaf pigments. Here, we evaluated the effect of local environmental variables and tree structural characteristics, in the chlorophyll-a leaf concentration (Chl-a) associated with temporal change in two mangrove species. Rhizophora mangle (R. mangle) and Avicennia germinans (A. germinans) trees of a fringe mangrove forest (FMF) and lower basin mangrove forest (BMF) were visited over a period of one year, to obtain radiometric readings at leaf level to estimate Chl-a. Measurements on tree characteristics included diameter at breast height (DBH), basal area (BA), and maximum height (H). Environmental variables included soil interstitial water temperature (Ti), salinity (Si), and dissolved oxygen (Oi), flood level (fL), ambient temperature (Tamb), and relative humidity (Hrel). Generalized linear models and covariance analysis showed that the variation of Chl-a is mainly influenced by the species, the interaction between species and mangrove forest type, DBH, seasonality and its influence on the species, soil conditions, and fL. Studies to assess spatial and temporal change on mangrove forests using the spectral characteristics of the trees should also consider the temporal variation of leave chlorophyll-a concentration.

ACS Style

Blanca Castellanos-Basto; Jorge Herrera-Silveira; Érick Bataller; Rodolfo Rioja-Nieto. Local Drivers Associated to Temporal Spectral Response of Chlorophyll-a in Mangrove Leaves. Sustainability 2021, 13, 4636 .

AMA Style

Blanca Castellanos-Basto, Jorge Herrera-Silveira, Érick Bataller, Rodolfo Rioja-Nieto. Local Drivers Associated to Temporal Spectral Response of Chlorophyll-a in Mangrove Leaves. Sustainability. 2021; 13 (9):4636.

Chicago/Turabian Style

Blanca Castellanos-Basto; Jorge Herrera-Silveira; Érick Bataller; Rodolfo Rioja-Nieto. 2021. "Local Drivers Associated to Temporal Spectral Response of Chlorophyll-a in Mangrove Leaves." Sustainability 13, no. 9: 4636.

Journal article
Published: 11 October 2019 in Microorganisms
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The southern Gulf of Mexico (sGoM) is highly susceptible to receiving environmental impacts due to the recent increase in oil-related activities. In this study, we assessed the changes in the bacterioplankton community structure caused by a simulated oil spill at mesocosms scale. The 16S rRNA gene sequencing analysis indicated that the initial bacterial community was mainly represented by Gamma-proteobacteria, Alpha-proteobacteria, Flavobacteriia, and Cyanobacteria. The hydrocarbon degradation activity, measured as the number of culturable hydrocarbonoclastic bacteria (CHB) and by the copy number of the alkB gene, was relatively low at the beginning of the experiment. However, after four days, the hydrocarbonoclastic activity reached its maximum values and was accompanied by increases in the relative abundance of the well-known hydrocarbonoclastic Alteromonas. At the end of the experiment, the diversity was restored to similar values as those observed in the initial time, although the community structure and composition were clearly different, where Marivita, Pseudohongiella, and Oleibacter were detected to have differential abundances on days eight-14. These changes were related with total nitrogen (p value = 0.030 and r2 = 0.22) and polycyclic aromatic hydrocarbons (p value = 0.048 and r2 = 0.25), according to PERMANOVA. The results of this study contribute to the understanding of the potential response of the bacterioplankton from sGoM to crude oil spills.

ACS Style

Sonia S. Valencia Agami; Daniel Cerqueda-García; Sébastien Putzeys; María Magdalena Uribe-Flores; Norberto Ulises García-Cruz; Daniel Pech; Jorge Herrera-Silveira; M. Leopoldina Aguirre-Macedo; José Q. García-Maldonado. Changes in the Bacterioplankton Community Structure from Southern Gulf of Mexico During a Simulated Crude Oil Spill at Mesocosm Scale. Microorganisms 2019, 7, 441 .

AMA Style

Sonia S. Valencia Agami, Daniel Cerqueda-García, Sébastien Putzeys, María Magdalena Uribe-Flores, Norberto Ulises García-Cruz, Daniel Pech, Jorge Herrera-Silveira, M. Leopoldina Aguirre-Macedo, José Q. García-Maldonado. Changes in the Bacterioplankton Community Structure from Southern Gulf of Mexico During a Simulated Crude Oil Spill at Mesocosm Scale. Microorganisms. 2019; 7 (10):441.

Chicago/Turabian Style

Sonia S. Valencia Agami; Daniel Cerqueda-García; Sébastien Putzeys; María Magdalena Uribe-Flores; Norberto Ulises García-Cruz; Daniel Pech; Jorge Herrera-Silveira; M. Leopoldina Aguirre-Macedo; José Q. García-Maldonado. 2019. "Changes in the Bacterioplankton Community Structure from Southern Gulf of Mexico During a Simulated Crude Oil Spill at Mesocosm Scale." Microorganisms 7, no. 10: 441.

Journal article
Published: 31 May 2019 in Parasites & Vectors
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We assessed metrics of the metazoan parasite infracommunities of the dusky flounder (Syacium papillosum) as indicators of aquatic environmental health of the Yucatan Shelf (YS) prior to oil extraction. We sampled the dusky flounder and its parasites along the YS, mostly during the 2015 north wind season (November-April). Our aims were: (i) to determine whether the parasite infracommunity metrics of S. papillosum exhibit significant differences among YS subregions; (ii) to determine whether the probability of the occurrence of its parasite species and individuals were affected by environmental variables, nutrients, heavy metals and hydrocarbons at the seascape level; and (iii) to determine whether there were statistical differences between the parasite infracommunity metrics of S. papillosum from YS and those of Syacium gunteri from the Campeche Sound. Multivariate statistical analyses and generalised additive models (GAMs) were used to examine the potential statistical associations between the contaminants, environmental variables and parasite community metrics, and the maximum entropy algorithm (MaxEnt) was used to characterise the habitat's suitability for the parasite's probability of occurrence. We recovered 48 metazoan parasite species from 127 S. papillosum, with larval cestodes and digeneans being the most numerically-dominant. Multivariate analyses showed significant differences in parasite infracommunity metrics among Western YS, Mid YS and Caribbean subregions, with the latter being the richest in species but not in individuals. The GAM and MaxEnt results indicated a negative effect of top predators (e.g. sharks and rays) removal on parasite metrics. The parasite infracommunities of S. papillosum were twice as rich in the number of species and individuals as those reported for S. gunteri from the Campeche Sound. The significant differences among subregions in parasite metrics were apparently due to the interruption of the Yucatan current during the north wind season. The fishing of top predators in combination with an influx of nutrients and hydrocarbons in low concentrations coincides with an increase in larval cestodes and digeneans in S. papillosum. The dusky flounder inhabits a region (YS) with a larger number of metazoan parasite species compared with those available for S. gunteri in the Campeche Sound, suggesting better environmental conditions for transmission in the YS.

ACS Style

Víctor M. Vidal-Martínez; Iván Velázquez-Abunader; Oscar Arturo Centeno-Chalé; Ana Luisa May-Tec; Lilia C. Soler-Jiménez; Daniel Pech; Ismael Mariño-Tapia; Cecilia Enriquez; Omar Zapata-Pérez; Jorge Herrera-Silveira; David I. Hernández-Mena; Sharon Z. Herzka; Uriel Ordoñez-López; M. Leopoldina Aguirre-Macedo. Metazoan parasite infracommunities of the dusky flounder (Syacium papillosum) as bioindicators of environmental conditions in the continental shelf of the Yucatan Peninsula, Mexico. Parasites & Vectors 2019, 12, 277 .

AMA Style

Víctor M. Vidal-Martínez, Iván Velázquez-Abunader, Oscar Arturo Centeno-Chalé, Ana Luisa May-Tec, Lilia C. Soler-Jiménez, Daniel Pech, Ismael Mariño-Tapia, Cecilia Enriquez, Omar Zapata-Pérez, Jorge Herrera-Silveira, David I. Hernández-Mena, Sharon Z. Herzka, Uriel Ordoñez-López, M. Leopoldina Aguirre-Macedo. Metazoan parasite infracommunities of the dusky flounder (Syacium papillosum) as bioindicators of environmental conditions in the continental shelf of the Yucatan Peninsula, Mexico. Parasites & Vectors. 2019; 12 (1):277.

Chicago/Turabian Style

Víctor M. Vidal-Martínez; Iván Velázquez-Abunader; Oscar Arturo Centeno-Chalé; Ana Luisa May-Tec; Lilia C. Soler-Jiménez; Daniel Pech; Ismael Mariño-Tapia; Cecilia Enriquez; Omar Zapata-Pérez; Jorge Herrera-Silveira; David I. Hernández-Mena; Sharon Z. Herzka; Uriel Ordoñez-López; M. Leopoldina Aguirre-Macedo. 2019. "Metazoan parasite infracommunities of the dusky flounder (Syacium papillosum) as bioindicators of environmental conditions in the continental shelf of the Yucatan Peninsula, Mexico." Parasites & Vectors 12, no. 1: 277.