Spatial and seasonal variations of the macrobenthic community and metal contamination in the Douro estuary (Portugal)

Mucha, Ana P.; Vasconcelos, M. Teresa S. D.; Bordalo, Adriano A.

doi:10.1016/j.marenvres.2004.12.004

Cited by 56 publications

(31 citation statements)

References 40 publications

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“…The findings of SEM were higher than the corresponding values for the sediments in Leizhou Peninsula (Li et al 2014a, b, c), Zhangzi Island, southwestern coastal Laizhou Bay and Laizhou Bay , Shen'ao Bay (Du et al 2011), Zhangjiang Estuary, Fujian (Jingchun et al 2010), Pearl River Estuary (Fang et al 2005), Jinzhou Bay (Hansen et al 1996), Futian mangrove, Shenzhen Bay (Chai et al 2015), Huanghe Estuary (Wu et al 2007), north area of the Bohai Bay (Wu et al 2007), Yangze River Estuary (Sun et al 2009), Mudflat, Zhangjiang Estuary (Jingchun et al 2010), Forest edge (Jingchun et al 2010), Zhangjiang Estuary (Jingchun et al 2010), Forest, Zhangjiang Estuary (Jingchun et al 2010), southern East China Sea continental slope , and Jiaozhou Bay (Huo et al 2001), all in China. The results in the present study were also higher than those recorded in the south coast of São Paulo in Brazil (Nizoli and Luiz-Silva 2012), Douro Estuary in Portugal (Mucha et al 2005), Guadalete River Estuary in Spain (Campana et al 2005), and lagoons (Burullus and Manzalah) in Egypt (Younis et al 2014). All of these studies did not perform in industrial and high-polluted areas; hence, it is expected to have lower concentration levels of SEM compared with this study that was conducted in heavily industrialized area.…”

Section: Spatial Distribution Of Sem In Sedimentscontrasting

confidence: 71%

“…In a recent study, Zhuang et al also reported that seasonal The sum of the SEM Zn , SEM Pb , SEM Ni , SEM Cu , and SEM Cd variations had no effect on SEM concentration levels in river sediment and pointed out that other factors such as variability in terrestrial inputs, hydrodynamic process, and deposition conditions, besides seasonal changes, might influence the distribution characteristics of SEM in sediments of rivers (Zhuang and Gao 2013). On the other hand, Mucha et al (2005) showed that only concentration of Al and Ni had clear seasonal patterns, presenting the highest in spring or fall and the lowest in winter or summer, and for all other metals (including Fe, Mn, Zn, Cu, Cr, Pb, and Cd), no clear pattern were found. The results of SEM showed approximately similar contents of AVS in the Asaluyeh harbor compared with the data obtained by Prica et al (2008) in Vojvodina, Serbia, and Younis et al (2014) in Maryut kagoon, Egypt, as shown in Table 4.…”

Section: Spatial Distribution Of Sem In Sedimentsmentioning

confidence: 99%

“…These areas are often regions of elevated population densities and centralized human activities (Gan et al 2013;Mucha et al 2005). As a result, high levels of pollutants in sediments reflect the effects of industrialization and urbanization (Celino et al 2008;Raj and Jayaprakash 2008).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of sediment quality based on acid-volatile sulfide and simultaneously extracted metals in heavily industrialized area of Asaluyeh, Persian Gulf: concentrations, spatial distributions, and sediment bioavailability/toxicity

Arfaeinia

Nabipour

Ostovar

et al. 2016

Environ Sci Pollut Res

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Sediment samples from the coastal area of Asaluyeh harbor were collected during autumn and spring 2015. The acidvolatile sulfide (AVS) and simultaneously extracted metals (SEMs) were measured to assess the sediment quality and potential ecological risks. The average concentrations (and relative standard deviation (RSD)) of AVS in the industrial sediments were 12.32 μmol/g (36.91) and 6.34 μmol/g (80.05) in autumn and spring, respectively, while in the urban area, these values were 0.44 μmol/g (123.50) and 0.31 μmol/g (160.0) in autumn and spring, respectively. The average concentrations of SEM (and RSD) in the industrial sediments were 15.02 μmol/g (14.38) and 12.34 μmol/g (20.65) in autumn and spring, respectively, while in the urban area, these values were 1.10 μmol/g (43.03) and 1.06 μmol/g (55.59) in autumn and spring, respectively. Zn was the predominant component (34.25-86.24 %) of SEM, while the corresponding value for Cd, much more toxic ingredient, was less than 1 %. Some of the coastal sediments in the harbor of Asaluyeh (20 and 47 % in autumn and spring, respectively) had expected adverse biological effects based on the suggested criterion by United States Environmental Protection Agency (USEPA), while most stations (80 and 53 % in autumn and spring, respectively) had uncertain adverse effects.

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Section: Spatial Distribution Of Sem In Sedimentscontrasting

confidence: 71%

Section: Spatial Distribution Of Sem In Sedimentsmentioning

confidence: 99%

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Assessment of sediment quality based on acid-volatile sulfide and simultaneously extracted metals in heavily industrialized area of Asaluyeh, Persian Gulf: concentrations, spatial distributions, and sediment bioavailability/toxicity

Arfaeinia

Nabipour

Ostovar

et al. 2016

Environ Sci Pollut Res

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show abstract

“…For example, the maximum value of Zn in the present study was 6378 ppm (Station C1 in 2000 sampling), which is much higher than 169 ppm in the Seine estuary, the most heavily contaminated French river (Dauvin 2008) or >200 ppm in the Douro estuary (Portugal: (Mucha et al 2005). In other geographically near estuary, the Guadiana River, the concentrations only reached maximum values of 149 ppm (Sánchez-Moyano et al 2003).…”

Section: Discussionmentioning

confidence: 45%

“…Community variables such as Shannon Diversity or taxa number showed the typical trend of estuaries, with a progressive increment towards the mouth river, but in a wide interval (e.g., H'= 0.96 and only 2 families at O1 until H'= 2.84 and 46 families at C4), which seem to demonstrate a strong stress on communities, at least at inner areas. High concentrations of heavy metals have been associated with low number of taxa and diversity in other estuaries (Mucha et al 2005). In fact, high concentrations of metals, together with the granulometric composition and water characteristics, has been one of the main factors in the ordinations of stations through Odiel-Tinto system, although it is not possible to determine separately the effect from each one of these factors.…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

2009

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The spatial-temporal variation of subtidal macrofauna communities of the OdielTinto estuary, one of the most polluted areas in the world, was studied along a sampling period of 4 years (and 3 sampling events). This system has shown typical water and sediment characteristics of estuarine areas although the inner stations showed high concentrations of heavy metals. The structure of the macrofauna community was associated with granulometry, the percentage of organic matter and the heavy metals.Like in other estuaries, the community was dominated by polychaetes (especially by small size opportunistic taxa), meanwhile the crustaceans were the least abundant. Some changes during the sampling period were: slight increment in richness and diversity; greater presence of molluscs and crustaceans in the inner zones; a more homogeneous spatial distribution of opportunistic taxa and a higher number of taxa involved in the differences among the estuary areas. The period of study does not allow assuring that these changes have been due to a true improvement or to natural cycles of the communities in naturally stressed systems. So that it would be necessary the establishment of a long-term monitoring programme to study the evolution of the macrofauna communities to state if the corrective measures could achieve an improvement of this environment. This programme should focus on the study of macrobenthic community's structure and on those selected parameters which have been the major structuring factors for these communities.

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Impact of organic matter source and quality on living benthic foraminiferal distribution on a river‐dominated continental margin: A study of the Portuguese margin

et al. 2016

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Living (rose Bengal stained) benthic foraminifera were investigated on surface sediments from 23 stations from the river-dominated northwestern Portuguese margin. Samples were collected in March 2011, following the period of the maximum rainfall over the Iberian Peninsula, between 20 and 2000 m water depth along five cross-margin transects. Four of them are located off the Douro, Mondego, Tagus, and Sado Rivers and one off the Estremadura coast. The major objectives of this study are (1) to assess the impact of organic matter of various origin and quality on the benthic foraminifera and (2) to investigate the spatial differences of faunal distribution from coastal waters to the deep sea under river influences. To do this, sedimentological and biogeochemical characteristics of the sediments were identified by measuring grain size, oxygen penetration depth, total organic carbon (TOC) content, stable carbon isotopic composition of TOC (δ 13 C TOC ) and concentration of pigments and amino acids. Based on the principal component and cluster analyses of the environmental data, three major geographical groups are identified: (1) deep stations, (2) coastal and middle slope stations, and (3) shelf stations under river influence. At the deepest stations, species are associated with high organic matter (OM) quantity but low OM quality, where Uvigerina mediterranea, Hoeglundina elegans, and agglutinated species such as Reophax scorpiurus or Bigenerina nodosaria are dominant. All stations off the Sado River, which is the most affected area by the anthropogenic influence, are also characterized by high quantity but low quality of OM with the minimum faunal density and diversity within the study area. Middle slope stations are associated with low OM content and coarse sediments (Q 50 ) with the predominance of N. scaphum. Shallow shelf stations close to the Douro and Tagus River mouths show a dominance of taxa (e.g., Ammonia beccarii, Bulimina aculeata, Eggerelloides scaber, Nonion scaphum, Cancris auriculus, and Quinqueloculina seminula) adapted to environments characterized by high OM quality (high fresh chlorophyll (Chl a/Phaeo)) and available amino acids (enzymatically hydrolyzable amino acid (EHAA)/total enzymatically hydrolyzable amino acid (THAA)). The Biotic and Environmental linking analysis suggests that the benthic foraminiferal distribution is mostly controlled by three environmental parameters, i.e., TOC (quantity), EHAA/THAA (quality), and δ 13 C TOC (source). Hence, this study clearly highlights that the quantitative and qualitative inputs of OM and its source are the most important factors controlling the living benthic foraminiferal distribution with clear influences between the different rivers. This study also suggests a good tolerance of several species for river discharges where the OM quality is high.

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Spatial and seasonal variations of the macrobenthic community and metal contamination in the Douro estuary (Portugal)

Cited by 56 publications

References 40 publications

Assessment of sediment quality based on acid-volatile sulfide and simultaneously extracted metals in heavily industrialized area of Asaluyeh, Persian Gulf: concentrations, spatial distributions, and sediment bioavailability/toxicity

Assessment of sediment quality based on acid-volatile sulfide and simultaneously extracted metals in heavily industrialized area of Asaluyeh, Persian Gulf: concentrations, spatial distributions, and sediment bioavailability/toxicity

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

Impact of organic matter source and quality on living benthic foraminiferal distribution on a river‐dominated continental margin: A study of the Portuguese margin

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