On the sources of PBDEs in coastal marine sediments off Baja California, Mexico

Macías-Zamora, José Vinicio; Ramírez-Álvarez, Nancy; Hernández-Guzmán, Félix Augusto; Mejía-Trejo, Adán

doi:10.1016/j.scitotenv.2016.07.142

Cited by 19 publications

(6 citation statements)

References 18 publications

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“…In the study area, the predominance of coarse sediments and the dispersion of pollutants has been previously related to the high energy oceanographic processes of the California Current System (Rodríguez-Villanueva et al ., 2003; Macías-Zamora et al ., 2016). The observed increase in percentage of silts in the inner shelf (north zone) from 1998 to 2013 could be related with particle discharge from the Binational wastewater treatment plant, which started operations in 1999, discharging 25 million gallons per day of advance primary treatment ().…”

Section: Discussionmentioning

confidence: 99%

“…Atmospheric deposition may be especially important as a source of pollutants in stormwater effluents in this region. Significant quantities of trace metals and other pollutants are emitted into the atmosphere daily, followed by deposition in the water column, rapid removal and transportation to bottom sediments (Chong & Wang, 2000; Schiff et al , 2000; Sabin et al , 2005; Castro-Morales et al , 2014; Macías-Zamora et al , 2014a, 2016). These anthropogenic contaminants may accumulate in sediments of nearshore coastal regions causing habitat alteration and thus changes in community composition, abundance and diversity of benthic fauna (Lenihan et al , 2003; Ranasinghe et al , 2003, 2007, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal analysis of benthic polychaete community structure in the north-western coast of Baja California, Mexico

Alvarez-Aguilar

Rodríguez-Villanueva²,

Macías-Zamora

et al. 2017

J. Mar. Biol. Ass.

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A temporal analysis of the benthic polychaete community and its relationship with environmental variables was conducted by comparing coastal sediment samples collected in three separate sampling events between 1998 and 2013 from the southern end of the Southern California Bight (SCB). Environmental variables indicated a spatio-temporal increase of the sand fraction in sediment composition. Station stratification by depth from shallow to deep, and a reduction of trace metal enrichment (Co, Cr, Cu, Mn, Ni, Pb and Zn) was also found. There was a notable change in polychaete family composition due to high abundances and frequency of Spionidae, Chaetopteridae and Phyllodocidae in 2013, especially close to the Binational wastewater treatment plant discharge. An increase in polychaete abundance, richness and diversity was indicative of a probable relationship with regional weather conditions (El Niño-Southern Oscillation and recent drought events during sampling) along with local anthropogenic discharges of wastewater treatment plants in the area.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatio-temporal analysis of benthic polychaete community structure in the north-western coast of Baja California, Mexico

Alvarez-Aguilar

Rodríguez-Villanueva²,

Macías-Zamora

et al. 2017

J. Mar. Biol. Ass.

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“…The extract obtained was concentrated by evaporation using the GENEVAC Rocket equipment to approximately a volume of 2 mL and its volume was reduced to about 1.0 mL, prior to the cleaning procedure. The cleaning procedure was carried out using the method proposed by Macias-Zamora et al, [6] with some modifications. Cleanup was performed by liquid chromatography on a 1 × 30 cm glass column packed bottom-up with 12 cm of silica (Sigma-Aldrich, 60-200 mesh, 150 Å, 3% deactivated) and 6 cm of alumina (Sigma-Aldrich, ~150 mesh, 58 Å, 3% deactivated).…”

Section: Methodsmentioning

confidence: 99%

“…We have previously reported on the presence of Polybrominated diphenyl ethers (PBDEs) which is a group of manmade chemicals and of global distribution [6]. Because of their very wide environmental distribution, they are a concern.…”

Section: Introductionmentioning

confidence: 99%

Are PBDEs In Marine Sediments From The Coast Of Baja California Mexico Increasing In Time? A Problem Revisited

Macías-Zamora¹,

Ramírez-Álvarez²,

Hernández-Guzmán³

et al. 2022

Proceedings of the 8th World Congress on New Technologies

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We report here on the finding for PBDEs in coastal marine sediments in the south end of the Southern California Bight. We propose that there are two main contributors to the distribution of these chemicals in this part of the world for the surface distribution and composition of the PBDEs found. On the one hand, the presence of potential local sources such as wastewater treatment plants and on the other, the energy in the area provided mainly from the currents, the winds and waves for each area (North, Central, and South) and a third component due to the local topography. The range of concentrations for the sum of 14 PBDEs was; from undetected to a maximum of 9.74 ng/g dry weight. Generally, the largest concentrations coincided with samples collected in the deeper sites and located to the north. As previously found, the BDE-209 is predominant congener which indicates the trend given the discontinued commercial use of Penta-BDE and the Octa-BDE mixtures while maintaining still in use the Deca mixture. We also found an apparent increase in concentrations for the sum of these 14 PBDEs analysed as compared to that reported by us in 2013.

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“…In bays such as Bahia de Todos Santos, due to weather conditions, pollutants may buildup on impervious surfaces during the extended dry seasons, and subsequently wash-off into the ocean once the wet season begins. Atmospheric deposition may be especially important as a source of pollutants to stormwater effluents in these regions because significant quantities of trace metals and other pollutants are emitted into the atmosphere daily, depositing onto the water column and rapidly being removed and transported to bottom sediments (Macías-Zamora 1996;Macías-Carranza et al 1997;Schiff 2000;Chong & Wang, 2000;Macías-Zamora et al 2002;Lenihan et al 2003;Sabin et al 2005;Macías-Zamora et al 2016;Macías-Zamora et al 2018).…”

Section: Introductionmentioning

confidence: 99%

<p class="ZootaxaTitle"><strong>Biodiversity of polychaetous annelids in Bahía de Todos Santos, Baja California México</strong></p>

Araujo-Leyva¹,

Rodríguez-Villanueva

Macías-Zamora³

2020

Zoosymposia

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The aim of this study was to describe and analyze the structure, distribution, and temporal variation in the composition of benthic polychaeta and their relation to abiotic characteristics in marine sediments along the continental shelf of Bahia de Todos Santos, Baja California, Mexico. Benthic macrofauna and environmental variables were collected to coordinated with a long-term ocean monitoring project known as the Southern California Bight Regional Monitoring Program. A total of nineteen stations were collected in September 1998, twenty stations in November 2003, fifteen stations in December 2013 and sixteen stations in September 2018. These data were compared to assess the response of benthic polychaete assemblages to natural and human induced changes in sediment characteristics. All stations were sampled using a Van Veen grab (0.1 m2) at depths between 15 to 206 m. Sites were selected using a multiple density nested random-tessellation stratified design. Environmental parameters measured included depth (m), sediment grain size <63µm (%), organic carbon (%), and concentration of metals: Co, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn. A total of 11,854 polychaetous annelids were identified in 43 families, with the numerically dominant families for all years (Spionidae, Chaetopteridae, Cirratulidae, Maldanidae, Onuphidae, and Ampharetidae) accounting for 52.95% of individuals. The best represented families in 1998 were Spionidae, Maldanidae, Ampharetidae and Cirratulidae. In 2003 the best represented families were Spionidae, Maldanidae, Cirratulidae, and Onuphidae; in 2013 Chaetopteridae and Spionidae; and in 2018 Spionidae, Ampharetidae, Syllidae and Cirratulidae. The Bio-Env multivariate analysis showed that the factors that most correlated with the abundance and richness of families and had the greatest influence over spatial distribution trends for community structure were %Organic carbon and Cu concentration during 1998, % Organic carbon and depth in 2003 and Pb concentration in 2013.

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On the sources of PBDEs in coastal marine sediments off Baja California, Mexico

Cited by 19 publications

References 18 publications

Spatio-temporal analysis of benthic polychaete community structure in the north-western coast of Baja California, Mexico

Spatio-temporal analysis of benthic polychaete community structure in the north-western coast of Baja California, Mexico

Are PBDEs In Marine Sediments From The Coast Of Baja California Mexico Increasing In Time? A Problem Revisited

<p class="ZootaxaTitle"><strong>Biodiversity of polychaetous annelids in Bahía de Todos Santos, Baja California México</strong></p>

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