Response of Benthic Foraminifera to Organic Matter Quantity and Quality and Bioavailable Concentrations of Metals in Aveiro Lagoon (Portugal)

被引：88

作者：

Alves Martins, Maria Virgnia ^{[1
,2
]}

Silva, Frederico ^{[3
]}

Laut, Lazaro L. M. ^{[4
]}

Frontalini, Fabrizio ^{[5
]}

Clemente, Iara M. M. M. ^{[1
]}

Miranda, Paulo ^{[2
]}

Figueira, Rubens ^{[6
]}

Sousa, Silvia H. M. ^{[6
]}

Alveirinho Dias, Joao M. ^{[7
]}

机构：

[1] Univ Estado Rio de Janeiro, Fac Geol, Dept Estratig & Paleontol, BR-20550013 Rio De Janeiro, RJ, Brazil

[2] Univ Aveiro, Dept Geociencias, P-3810193 Aveiro, Portugal

[3] Univ Fed Rio de Janeiro, Lab Palinofacies & Facies Organ LAFO, BR-21949900 Rio De Janeiro, RJ, Brazil

[4] Univ Fed Estado Rio de Janeiro UNIRIO, Lab Micropaleontol LabMicro, BR-22290240 Rio De Janeiro, RJ, Brazil

[5] Univ Urbino Carlo Bo, Dipartimento Sci Terra Vita & Ambiente DiSTeVA, Urbino, Italy

[6] Univ Sao Paulo, Inst Oceanog, BR-30916502 Sao Paulo, Brazil

[7] Univ Algarve, Ctr Invest Marinha & Ambiental, Faro, Portugal

来源：

PLOS ONE | 2015年 / 10卷 / 02期

关键词：

HEAVY-METALS; COASTAL SEDIMENTS; WATER-QUALITY; TROPHIC STATE; ESTUARY RIA; MARINE; ASSEMBLAGES; POLLUTION; MERCURY; OXYGEN;

D O I：

10.1371/journal.pone.0118077

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This work analyses the distribution of living benthic foraminiferal assemblages of surface sediments in different intertidal areas of Ria de Aveiro (Portugal), a polihaline and anthropized coastal lagoon. The relationships among foraminiferal assemblages in association with environmental parameters (temperature, salinity, Eh and pH), grain size, the quantity and quality of organic matter (enrichment in carbohydrates, proteins and lipids), pollution caused by metals, and mineralogical data are studied in an attempt to identify indicators of adaptability to environmental stress. In particular, concentrations of selected metals in the surficial sediment are investigated to assess environmental pollution levels that are further synthetically parameterised by the Pollution Load Index (PLI). The PLI variations allowed the identification of five main polluted areas. Concentrations of metals were also analysed in three extracted phases to evaluate their possible mobility, bioavailability and toxicity in the surficial sediment. Polluted sediment in the form of both organic matter and metals can be found in the most confined zones. Whereas enrichment in organic matter and related biopolymers causes an increase in foraminifera density, pollution by metals leads to a decline in foraminiferal abundance and diversity in those zones. The first situation may be justified by the existence of opportunistic species (with high reproduction rate) that can live in low oxic conditions. The second is explained by the sensitivity of some species to pressure caused by metals. The quality of the organic matter found in these places and the option of a different food source should also explain the tolerance of several species to pollution caused by metals, despite their low reproductive rate in the most polluted areas. In this study, species that are sensitive and tolerant to organic matter and metal enrichment are identified, as is the differential sensitivity/tolerance of some species to metals enrichment.

引用

页数：23

共 81 条

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