Anomalous Trace Element Composition of Coastal Sediments near the Copper Mining District of Santa Rosalía, Peninsula of Baja California, Mexico

Shumilin, Evgueni; Figueroa, Griselda Margarita Rodríguez; Bermea, Ofelia Morton; Lounejeva, E; Hernández, E.; Meza, G. Durga Rodríguez

doi:10.1007/s0012800123

Cited by 17 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Well-developed commercial and artisanal fisheries encompass virtually all of the coastal areas and important plans for building large harbors are in progress. Concentrations of metals such as Zn, Cu and Pb in sediment and mollusks of some regions have been reported above those in industrialized zones in Russia and the USA (Gutie´rrez-Galindo et al 1999;Shumilin et al 2000). Cd concentrations in Baja California mussels (2.7-70.2 lg/g ww; Gutie´rrez-Galindo et al 1999) are higher than in biota from highly urbanized areas of the US State of California (0.2-0.9 lg/g ww; Cohen et al 2001).…”

Section: Introductionmentioning

confidence: 95%

“…Although currently much of the peninsula remains relatively undeveloped, the State of Baja California Sur has mineral deposits of gold, silver, copper, zinc, and phosphorous which have been exploited since the nineteenth century (Shumilin et al 2000). During the past 30 years, the human population and development of this region have increased exponentially.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavy Metal Accumulation in Four Species of Sea Turtles from the Baja California Peninsula, Mexico

Gardner¹,

Fitzgerald²,

Vargas³

et al. 2006

Biometals

104

View full text Add to dashboard Cite

Heavy metals were assessed in four species of sea turtles from the Baja California Peninsula, Mexico, representing the first report of heavy metal concentrations in tissues of post-yearling sea turtles from the Eastern Pacific. Concentrations of Cd measured in C. mydas kidney (653 microg/g dry wt) were the highest ever reported for any sea turtle species. Cd accumulated preferentially in kidney and the ratios of kidney to liver Cd in Baja California turtles were among the highest reported for sea turtles globally. Zn, Ni, and Mn concentrations were also significantly higher in kidney than other tissues, while Cu and Fe were greatest in liver, and all metals were lowest in muscle. With the exception of one value (69.9 microg/g in kidney of C. caretta), Pb was low in all tissues from Baja California. In comparisons across species, kidney of C. mydas had greater Zn and Ni concentrations as compared to other species, although there was no difference in liver metal levels among the species. Positive correlations were detected in the concentrations of Cd, Cu and Ni with the straight carapace length of C. caretta.

show abstract

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Heavy Metal Accumulation in Four Species of Sea Turtles from the Baja California Peninsula, Mexico

Gardner¹,

Fitzgerald²,

Vargas³

et al. 2006

Biometals

104

View full text Add to dashboard Cite

show abstract

“…This includes the coastal zone of the Gulf of California (Huerta-Díaz et al 2007;Páez-Osuna et al 2000;Rodríguez-Castañeda et al 2006;Sánchez-Rodríguez et al 2001). Copper mining and smelting over the past century (up to 1984) near Santa Rosalía, a town on the eastern coast of the central part of the Baja California Peninsula, have heavily polluted the sediments of the adjacent area of the Gulf of California, particularly with Co, Cu, Mn and Zn (Rodríguez Figueroa 2004;Rodríguez Figueroa et al 1998;Shumilin et al 2000). It is important to know if heavy metals are sufficiently mobile in the sediments to reach the tissues of marine biota.…”

Section: Introductionmentioning

confidence: 98%

Heavy metal pollution monitoring using the brown seaweed Padina durvillaei in the coastal zone of the Santa Rosalía mining region, Baja California Peninsula, Mexico

2008

View full text Add to dashboard Cite

The coastal marine sediments near Santa Rosalía on the eastern coast of the Baja California Peninsula (Mexico) are heavily polluted by metals due to copper mining and smelting over the past century (up to 1984). The present study compares the accumulation of metals in the brown seaweed Padina durvillaei from the central segment of the coast of Santa Rosalía (polluted by Co, Cu, Mn and Zn) and from two segments north and south of the known "hot spot". The seaweed samples were collected in May and August 2004 and June 2005 at 13 stations located along the Santa Rosalía mining region. Heavy metal concentrations were measured by instrumental neutron activation analysis (Co and Fe) directly in dried homogenized subsamples or by flame atomic absorption spectrophotometry (Cd, Cu, Mn, Ni, Pb and Zn) after complete strong acid digestion of sub-samples. The means and standard deviations of the concentrations in dry tissues of Padina durvillaei specimens for all the studied metals and stations lie in the following sequence: Cd (3.6±1.6 mg kg −1 ) < Co (6.5±6.1 mg kg −1 ) < Pb (7.8± 6.2) < Ni (9.96±5.28 mg kg −1 ) < Cu (53±38 mg kg −1 ) < Zn (63±43 mg kg −1 ) < Mn (295±269 mg kg −1 ) < Fe (2243±2325 mg kg −1 ). This increase of the average concentrations was statistically significant. Principal Component Analysis showed that Factor 1 (36.46%) displays high positive loadings for Co, Cu, Mn and Zn, reflecting the influence of local anthropogenic pollution on the seaweed composition, while Factor 2 (26.91%) is important for Co, Fe and Ni and probably corresponds to the adsorption or accumulation of terrigenous elements of the regional origin, while Factor 3, with a high positive loading for Pb and a high negative loading for Cd, is probably controlled by local and regional anthropogenic input of Pb and episodic supply of Cd by local upwellings. The results of ANOVA for each element do not show any significant differences between the average concentrations for Cd, Fe, Ni and Pb in the seaweed of the three segments, or between the central and southern segments for Cu, Mn and Zn. Cobalt contents in the seaweed from the northern and central segments are, however, significantly different from the southern segment. This indicates that element concentrations in Padina durvillaei generally do not follow the drastic increases and gradients of Cu, Co, Mn and Zn contents detected in surface sediments. The apparent contradiction could be explained by a low geochemical mobility of these metals in the polluted sediments, composed mainly of stable residues of smelter wastes, with very low content of organic matter usually driving diagenetic mobilization of some metals into interstitial waters and then to the overlying water.

show abstract

“…Some of the malformations in shark can also be related to contamination. It is worth to mention that although the western coast of BCS is considered a pristine area, it has important mineral deposits that could contribute to high variations in heavy metal concentration Shumilin et al 2000.…”

Section: Discussionmentioning

confidence: 99%

First record of spine malformation of the round stingray Urobatis halleri off the Western Coast of Baja California Sur, México

et al. 2016

View full text Add to dashboard Cite

Background: Malformations of the Round stingray Urobatis hallerii, Cooper 1863 captured off the southwestern coast of Baja California Sur, México are reported in this study. Methods: The ray was an adult male captured by artisanal fishery in the area of Estero Banderitas. Size measurements of total length and disk width were taken; the organism could be photographed when captured. Results: Malformations of U. hallerii were found in the posterior part of the spine, a distortion in the upper part of the tail and in the left fin close to the tail. The specimen was considered able to reach the adult size usually reported in other specimens of this species despite the spine malformations because of its benthic habits and not losing its mobility completely. Conclusions: The observed malformations were likely due to genetic alterations although other studies are needed to see if other environmental factors could cause malformations in marine organisms mainly in fish and elasmobranchs.

show abstract

Anomalous Trace Element Composition of Coastal Sediments near the Copper Mining District of Santa Rosalía, Peninsula of Baja California, Mexico

Cited by 17 publications

References 0 publications

Heavy Metal Accumulation in Four Species of Sea Turtles from the Baja California Peninsula, Mexico

Heavy Metal Accumulation in Four Species of Sea Turtles from the Baja California Peninsula, Mexico

Heavy metal pollution monitoring using the brown seaweed Padina durvillaei in the coastal zone of the Santa Rosalía mining region, Baja California Peninsula, Mexico

First record of spine malformation of the round stingray Urobatis halleri off the Western Coast of Baja California Sur, México

Contact Info

Product

Resources

About