Marine and brackish-water ostracods as sentinels of anthropogenic impacts

Muñoz, Francisco Ruíz; Abad, Manuel; Bodergat, Anne‐Marie; Carbonel, Pierre; Rodríguez-Lázaro, Julio; Yasuhara, Moriaki

doi:10.1016/j.earscirev.2005.04.003

Cited by 103 publications

(61 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their calcified bivalved shells are commonly preserved as fossils, usually as disarticulated valves. Like foraminiferans, they are sensitive indicators of environmental conditions, including changes caused by human impacts (Ruiz et al, 2005). They respond to salinity and bottom-water oxygenation with assemblages in stressed environments often being dominated by single species (Boomer, 2002).…”

Section: Benthic Ostracodamentioning

confidence: 99%

“…Unlike foraminiferans, and in common with most crustacean taxa (e.g. Moodley et al, 1997), they usually are intolerant of hypoxia, although a few marine and brackish-water species are exceptions (Modig and Olafsson, 1998;Cronin and Vann, 2003;Whatley et al, 2003;Ruiz et al, 2005;Corbari et al, 2005). Cyprideis torosa, one of the most abundant metazoans in coastal Baltic waters, survives in sulphidic habitats by oxidizing sulphide to thiosulphate (Jahn et al, 1996).…”

Section: Benthic Ostracodamentioning

confidence: 99%

See 1 more Smart Citation

Historical records of coastal eutrophication-induced hypoxia

Jorissen²,

et al. 2009

View full text Add to dashboard Cite

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.

show abstract

Section: Benthic Ostracodamentioning

confidence: 99%

Section: Benthic Ostracodamentioning

confidence: 99%

Historical records of coastal eutrophication-induced hypoxia

Jorissen²,

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Stations PDY-V and PDY-VI located from coastal area and with the silt and clay percentage is high, has a community high species diversity, species richness and individual numbers than the station PDY-II and PDY-III. The communities are comprised of variety of larger but less abundant individual organisms which are associated with unpolluted sediment (Ruiz et al, 2005). In Puducherry study area, station PDY-III species richness, diversity and individual abundance are all very low, because the station PDY-III was located mouth area this area dragging so sediment nature is distributed.…”

Section: Cluster Analysismentioning

confidence: 99%

Spatial and Seasonal Variation of Macrobenthos from Puducherry Coast, Southeast Coast of India

Sundaramanickam¹,

Arumugam²,

Kumarasen³

2016

Int.J.Curr.Microbiol.App.Sci

View full text Add to dashboard Cite

“…The anthropogenic input of metallic elements, particularly from rapid economic development in coastal areas, has caused severe environmental crisis in marine ecosystems [1][2][3][4]. Trace metals (e.g., Fe, Mn, Cr, Cu, Ni, Co, Zn and Pb) are of particularly high concern due to their persistence in the environment, bioaccumulation, and high toxicity [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of Core Sediments from Tropical Mangrove Region of Tamil Nadu: Implications on Trace Metals

Kalaivanan¹,

Jayaprakash²,

Nethaji³

et al. 2017

J Earth Sci Clim Change

View full text Add to dashboard Cite

The present study aims to determine the concentrations of certain trace metals (Fe, Mn, Cr, Cu, Pb, Zn, Co, Ni, Ba, Sr, V and Rb) and to identify the possible sources of the trace metals with multivariate analyses and assess the metal contamination using the enrichment factor (EF) and geo-accumulation index (I geo ) from the two core samples taken from Pichavaram lagoon. Pichavaram mangrove is a dynamic intertidal environment lying in between Vellar and Coleroon estuaries in Cauvery delta along the east coast of India. High OM in the present study is noted in both core samples which are mainly controlled by productivity and sediment texture. The increase of trace metals concentrations was observed at lower intersects which indicates that the trace metals were reprecipitated around the redox boundaries.Further it signifies that the enrichment of metals in C1 core sample is closely related to the diagenetic. Factor 1 with significant positive loadings on Mud and good loadings on Fe and Mn suggests the associations of these metals with finer sediment fractions and aluminosilicates. These elements to be enriched in the clay fraction in both core samples. They are mainly related to anthropogenic inputs and reflect the complexing nature of the organic matter. I geo studies confirm the contamination of the study area. Overall the study highlights significant anthropogenic contributions in terms of heavy metal pollution. Comparative data for normalized enrichment factors and the modified degree of contamination show that Pichavaram sediments have suffered significant systematic heavy metal contamination following catchment urbanization.

show abstract

Marine and brackish-water ostracods as sentinels of anthropogenic impacts

Cited by 103 publications

References 63 publications

Historical records of coastal eutrophication-induced hypoxia

Historical records of coastal eutrophication-induced hypoxia

Spatial and Seasonal Variation of Macrobenthos from Puducherry Coast, Southeast Coast of India

Geochemistry of Core Sediments from Tropical Mangrove Region of Tamil Nadu: Implications on Trace Metals

Contact Info

Product

Resources

About