Control of fracture networks on a coastal karstic aquifer: a case study from northeastern Yucatán Peninsula (Mexico)

Zamora-Luria, Juan Carlos; Perera-Burgos, Jorge Adrián; González-Calderón, Alfredo; Stillman, Luis Ernesto Marín; Leal‐Bautista, Rosa María

doi:10.1007/s10040-020-02237-4

Cited by 9 publications

(4 citation statements)

References 57 publications

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“…Moreover, in this study, water samples were collected approximately 12 h after heavy rain in August and October (rainy season). Therefore, our results suggest a rapid transport of viral contaminants in SGDs, where previous reported flow rates of SGDs in Akumal bay were estimated to be in the order of 338–933 m 3 /d.m (Hernández‐Terrones et al, 2015) and where groundwater flow directions near the coast of Akumal include local discharges from inland to the coastline through SGDs (Zamora‐Luria et al, 2020).…”

Section: Discussionsupporting

confidence: 55%

Occurrence of enteric viruses and faecal indicators in submarine groundwater discharges in the coastal environment of the Mexican Caribbean

Muñoz‐Cortés¹,

Rosiles‐González²,

Valenzuela

et al. 2022

Water & Environment J

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The occurrence of faecal microorganisms such as total coliforms (TCs), Escherichia coli (E. coli), coliphages (somatic and F+ specific) and the genomes of faecal viruses: human adenovirus (HAdV), norovirus (NoV) genogroup I (GI) and II (GII), enterovirus (EV), aichi virus (AiV) and Pepper mild mottle virus (PMMoV), was explored in submarine groundwater discharges (SGDs) in the Mexican Caribbean. Ultra-filtrated water samples were subjected to nucleic acid extraction and real-time quantitative polymerase chain reaction (PCR). Results showed the presence of TC bacteria at all sites, whereas the detection of E. coli occurred only during the dry season. Coliphages occurred during the rainy and dry seasons, with concentrations ranging from 10 to 2560 plaque forming units (PFU/100 ml). HAdV and AiV were detected in 50% and 41% of the samples, at concentrations ranging from 10 2 to 10 4 genome copies per litre (GC/L) and from 10 2 to 10 6 GC/L, respectively. NoV GI and II were detected in 25% and 16% of the samples, at concentrations of 10 1 GC/L and 10 2 -10 3 GC/L, respectively. PMMoV was detected in 50% of the samples at concentrations ranging from 10 1 to 10 3 GC/L. The EV genomes were not detected. These findings demonstrate that faecal microorganisms can be transported through SGDs in the Mexican Caribbean, potentially contributing to human health risks for recreation.

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Section: Discussionsupporting

confidence: 55%

Occurrence of enteric viruses and faecal indicators in submarine groundwater discharges in the coastal environment of the Mexican Caribbean

Muñoz‐Cortés¹,

Rosiles‐González²,

Valenzuela

et al. 2022

Water & Environment J

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“…It is delimited to the north by the Gulf of Mexico, and it is part of the protected area "Reserva Estatal Cienagas y Manglares de la Costa Norte de Yucatán". The karst soil (K s ) in PY is formed of highly soluble carbonated rocks that allow the formation of dolines and terrestrial filtrations to the underlying aquifers which, during the rainy season, are recharged and saturate the flooding soil in some areas near the coast [38]. Two MFs were selected, both with the presence of R. mangle and A. germinans.…”

Section: Study Areamentioning

confidence: 99%

Local Drivers Associated to Temporal Spectral Response of Chlorophyll-a in Mangrove Leaves

et al. 2021

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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.

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“…Furthermore, the continental arrival region is characterized by a karstic system predominantly of carbonate rocks with high porosity and permeability due to the dissolution of the rock matrix, fractures, and the scarcity of soils, allowing for the infiltration of any pollutant fluid or pollutant dissolved in water [15,16]. Thus, karstic systems are highly vulnerable where attenuation processes of pollutants such as retention, mineralization, absorption, etc., are null or inefficient, so pollution is exacerbated [17].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Leachate Generated by Sargassum spp. in the Mexican Caribe: Part 1 Spatial Variations

Leal-Bautista,

Rodriguez-Garcia,

Acosta-González

et al. 2024

Water

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In this study, we evaluate the degradation by Sargassum spp. as a consortium in 2020 and 2021, and by species during 2021, collected at different distances from a coastline and in land deposits. The year 2021 had the largest leachate volume and the offshore site with the highest volume (60 mL/day) among five sites of collection. In relation to species’ leachate generation, S. fluitans reached 47.67 mL/day as its peak, which is earlier than S. natans (41.67 mL/day 14 days after S. fluitans). pH shows alkaline behavior and EC reflects the saline condition in the leachate, the consortium and species reaching values of pH 7.5 to 8.3 and 80 to 150 mS/cm of EC; the results do not show significant differences among sites, or between species. Despite a BOD/COD ratio of less than 0.1, the degradation process occurs as evidenced by the presence of leachate. The results confirm the existence of a variability in leachate production and the composition of Sargassum under the influence of factors such as the periodicity, site of collection, and proportions of species. Thus, even though these results emphasize leachate generation, knowing the limitations of leachate generation is crucial information for decision making on Sargassum storage and environmental management.

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Control of fracture networks on a coastal karstic aquifer: a case study from northeastern Yucatán Peninsula (Mexico)

Cited by 9 publications

References 57 publications

Occurrence of enteric viruses and faecal indicators in submarine groundwater discharges in the coastal environment of the Mexican Caribbean

Occurrence of enteric viruses and faecal indicators in submarine groundwater discharges in the coastal environment of the Mexican Caribbean

Local Drivers Associated to Temporal Spectral Response of Chlorophyll-a in Mangrove Leaves

Assessment of Leachate Generated by Sargassum spp. in the Mexican Caribe: Part 1 Spatial Variations

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