Recent Anthropogenic Impacts on the Bilbao Estuary, Northern Spain: Geochemical and Microfaunal Evidence

Cearreta, Alejandro; Irabién, María Jesús; Leorri, Eduardo; Yusta, Iñaki; Croudace, Ian W.; Cundy, Andrew B.

doi:10.1006/ecss.1999.0582

Cited by 153 publications

(57 citation statements)

References 26 publications

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“…The annual mean of all of the sediment heavy metal concentration values found in this work was low in comparison with other estuaries around the world, such as Kyeongi Bay in Korea (Ahn et al 1995), Sheldt in the Netherlands (Van Alsenoy et al 1993), Thames in the UK (Attrill and Thomes 1995), Port Philip Bay (Talbot et al 1976), the Bilbao Estuary (Cearreta et al 2000) and Jurujuba (Baptista Neto et al 2000). Indeed, all of the heavy metal values in the salt marsh of the Mondego Estuary are below the limits prescribed in the Guidance on the assessment and redevelopment of contaminated land (ICRLC 1987).…”

Section: Scirpus Maritimus Spartina Maritima Zostera Noltiicontrasting

confidence: 63%

Halophytes as sources of metals in estuarine systems with low levels of contamination

Couto

Duarte

Barroso

et al. 2013

Functional Plant Biol.

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Abstract.Heavy metal concentrations present in the above-and beowground tissues of Scirpus maritimus L., Spartina maritima (Curtis) Fernald and Zostera noltii Hornem were analysed seasonally in the Mondego Estuary, Portugal. The sediments of the estuary were confirmed to contain only low concentrations of heavy metals. The belowground tissues of all three species showed higher heavy metal concentrations than the aboveground tissues. Although the sediments only contained low levels of contamination, because the area occupied by S. maritimus and Z. noltii was large, significant quantities of heavy metals were accumulated and exported to the surrounding water bodies. In contrast with observations of highly contaminated estuaries, it was found that in spite of the low level of contaminants in the sediments of the Mondego Estuary, aquatic vegetation functioned as a source of metals for nearby systems.

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Section: Scirpus Maritimus Spartina Maritima Zostera Noltiicontrasting

confidence: 63%

Halophytes as sources of metals in estuarine systems with low levels of contamination

Couto

Duarte

Barroso

et al. 2013

Functional Plant Biol.

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“…In area column B = Baltic; D = Denmark; F = Finland; N = Norway; S = Spain; Fla = Florida; Mx = Mexico. See Brush (2001), Cronin and Vann (2003), Kemp et al (2000) and Rabalais et al (2007) Andrén et al (1999); 7) Barmawidjaja et al (1995); 8) Blackwelder et al (1996); 9) Bratton et al (2003) ; 10) Brunner (2006); 11) Cearreta et al (2000); 12) Chen et al (2001); 13) Chmura et al (2004); 14) Clarke et al (2003); 15) Clarke et al (2006); 16) Colman and Bratton (2003); 17) Cooper (1995); 18) Brush (1991, 1993); 19) Cornwell et al (1996); 20) Cronin and Vann (2003) Thomas et al (2000Thomas et al ( , 2004; 55) Toyoda and Kitazato (1995); 56) Tsujimoto et al (2006a); 57) Tsujimoto et al (2008); 58) Turner and Rabalais (1994); 59) Turner et al (2004); 60) Turner et al (2006); 61) Voss and Struck (1997); 62) Willard et al (2003); 63) Yasuhara et al (2003); 64) Yasuhara and Yamazaki (2005); 65) Yasuhara et al (2007); 66) Zheng et al (2003); 67) Zimmerman and Canuel (2000); 68) Zimmerman and Canuel (2001); 69) Zimmerman and Canuel (2002) …”

Section: Terminologyunclassified

Historical records of coastal eutrophication-induced hypoxia

Jorissen²,

et al. 2009

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Abstract. Under certain conditions, sediment cores from coastal settings subject to hypoxia can yield records of environmental changes over time scales ranging from decades to millennia, sometimes with a resolution of as little as a few years. A variety of biological and geochemical indicators (proxies) derived from such cores have been used to reconstruct the development of eutrophication and hypoxic conditions over time. Those based on (1) the preserved remains of benthic organisms (mainly foraminiferans and ostracods), (2) sedimentary features (e.g. laminations) and (3) sediment chemistry and mineralogy (e.g. presence of sulphides and redox-sensitive trace elements) reflect conditions at or close to the seafloor. Those based on (4) the preserved remains of planktonic organisms (mainly diatoms and dinoflagellates), (5) pigments and lipid biomarkers derived from prokaryotes and eukaryotes and (6) organic C, N and their stable isotope ratios reflect conditions in the water column. However, the interpretation of these indicators is not straightforward. A central difficulty concerns the fact that hypoxia is strongly correlated with, and often induced by, organic enrichment caused by eutrophication, making it difficult to separate the effects of these phenomena in sediment records. The problem is compounded by the enhanced preservation in anoxic and hypoxic sediments of organic microfossils and biomarkers indicating eutrophication. The use of hypoxiaCorrespondence to: A. J. Gooday (ang@noc.soton.ac.uk) specific proxies, such as the trace metals molybdenum and rhenium and the bacterial biomarker isorenieratene, together with multi-proxy approaches, may provide a way forward. All proxies of bottom-water hypoxia are basically qualitative; their quantification presents a major challenge to which there is currently no satisfactory solution. Finally, it is important to separate the effects of natural ecosystem variability from anthropogenic effects. Despite these problems, in the absence of historical data for dissolved oxygen concentrations, the analysis of sediment cores can provide plausible reconstructions of the temporal development of humaninduced hypoxia, and associated eutrophication, in vulnerable coastal environments.

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“…Due to their geomorphological and physicochemical properties, lagoons and estuaries are potential deposit areas for anthropogenic sediments, and the number of studies dealing with these subjects is increasing rapidly (JONES; TURKI, 1997;BIRCH;TAYLOR, 1999;CEARRETA et al, 2000CEARRETA et al, , 2002CUNDY et al, 2003;ELBERLING et al, 2003;PASTERNACK;BROWN, 2006;DONDERS et al, 2008;LEORRI et al, 2008). An important approach to the subject is related to the sedimentary record of this anthropogenic influence, which incorporates high resolution geochronology with proxies of different types so as to provide a reliable documentation of the contamination history of a given area (ALVE, 1991(ALVE, , 1995PLATER et al, 1998;APPEBY, 2004;LI et al, 2000;CHAN et al, 2001;CEARRETA et al, 2002;RUIZ-FERNÁNDEZ et al, 2007, among others).…”

Section: Introductionmentioning

confidence: 99%

“…Other outstanding papers on the subject included those carried out by Cearreta et al (2000Cearreta et al ( , 2002 who identified the impact of the anthropogenic activities in the metal geochemistry and microfauna of the Bilbao Estuary (Northern Spain). Over a 150-year period, this estuary received effluents from mining and industrial and domestic waste, and it became the most polluted estuary in North of Spain.…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil)

et al. 2009

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A B S T R A C TThe Cananéia-Iguape system, SE Brazil, consists of a complex of lagoonal channels, located in a United Nations Educational, Scientific and Cultural Organization (UNESCO) Biosphere Reserve. Nevertheless, important environmental changes have occurred in approximately the last 150 yrs due to the opening of an artificial channel, the Valo Grande, connecting the Ribeira de Iguape River to the lagoonal system. Our objective is to assess the historical record of the uppermost layers of the sedimentary column of the lagoonal system in order to determine the history of environmental changes caused by the opening of the artificial channel. In this sense, an integrated geochemicalfaunal approach is used. The environmental changes led significant modifications in salinity, in changes of the depositional patterns of sediments and foraminiferal assemblages (including periods of defaunation), and, more drastically, in the input of heavy metals to the coastal environment. The concentrations Pb in the core analyzed here were up to two times higher than the values measured in contaminated sediments from the Santos estuary, the most industrialized coastal zone in Brazil. R E S U M OO sistema Cananéia-Iguape (Sudeste do Brasil), consiste em um complexo de canais lagunares localizados no interior de uma Reserva da Biosfera (assim definida pela UNESCO). Não obstante, variações ambientais importantes ocorreram nos últimos 150 anos, devido à abertura de um canal artificial, o Valo Grande, conectando o Rio Ribeira de Iguape ao sistema lagunar. O objetivo deste trabalho foi determinar a história das variações ambientais no sistema lagunar, causadas pela abertura do canal artificial, através da análise das camadas superiores da coluna sedimentar de um testemunho coletado no sistema. Neste sentido, uma abordagem integrada, envolvendo variações geoquímicas e faunísticas foi utilizada. As variações ambientais ocorridas apontam para mudanças drásticas na salinidade, nos padrões de sedimentação, nas associações de foraminíferos (incluindo períodos azóicos) e, mais drasticamente, no aporte de metais para o sistema costeiro. As concentrações de Pb no testemunho coletado indicam valores duas vezes maiores do que os medidos em sedimentos contaminados do estuário de Santos, situado na zona costeira mais industrializada do Brasil.

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Recent Anthropogenic Impacts on the Bilbao Estuary, Northern Spain: Geochemical and Microfaunal Evidence

Cited by 153 publications

References 26 publications

Halophytes as sources of metals in estuarine systems with low levels of contamination

Halophytes as sources of metals in estuarine systems with low levels of contamination

Historical records of coastal eutrophication-induced hypoxia

Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil)

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