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Kusnerik KM, Means GH, Portell RW, Kannai A, Monroe MM, Means R, Kowalewski M. Long-Term Shifts in Faunal Composition of Freshwater Mollusks in Spring-Fed Rivers of Florida. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.851499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Florida’s freshwater spring and river ecosystems have been deteriorating due to direct and indirect human impacts. However, while the conservation and restoration strategies employed to mitigate these effects often rely on faunal surveys that go back several decades, the local ecosystem shifts tend to have much deeper roots that predate those faunal surveys by centuries or millennia. Conservation paleobiology, an approach which enhances our understanding of the past states of ecosystems, allows for comparison of modern faunal communities with those prior to significant human impacts. This study examines the historical record of freshwater mollusk assemblages from two spring-fed river systems, the Wakulla and Silver/Ocklawaha Rivers. Specifically, we compared fossil assemblages (latest Pleistocene - early Holocene) and live mollusk assemblages in the two targeted river systems. Bulk sampling of the fossil record (20 sites; 70 samples; 16,314 specimens) documented relatively diverse mollusk assemblages that consist of a suite of native freshwater species that is similar across the studied systems. In contrast, sampling of live communities (24 sites; 138 samples; 7,572 specimens) revealed depauperate species assemblies characterized by the absence of multiple native freshwater species commonly found in fossil samples, the widespread presence of introduced species, and dominance of brackish-tolerant species at the lower Wakulla River sites. Unlike fossil mollusk assemblages, live mollusk assemblages differ notably between the two river systems due to differences in relative abundance of introduced species (Melanoides tuberculata and Corbicula fluminea) and the presence of brackish-tolerant mollusks in the coastally influenced Wakulla River. The diverse, exclusively freshwater mollusk associations comparable across multiple river systems documented in the fossil record provide a historical perspective on the past state of freshwater river ecosystems complementing data provided by modern surveys. The conservation paleobiology approach used in this study reinforces the importance of considering the historical ecology of an ecosystem and the utility of the fossil record in providing a historical perspective on long-term faunal changes.
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Liu X, Yu S, Chen P, Hong B, Zhang Y, Lin X, Ma T, Zhou T, Li Y. Metal loadings in estuarine bivalve and gastropod shellfish in response to socioeconomic development in watershed. MARINE ENVIRONMENTAL RESEARCH 2022; 176:105593. [PMID: 35303644 DOI: 10.1016/j.marenvres.2022.105593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/25/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Metal contamination in estuary was monitored globally using shellfish while estuarine metal loadings were influenced by socioeconomic development in watershed, i.e., a watershed-estuary chain effect. Socioeconomic pattern of metal loadings in estuarine shellfish has scarcely been studied. Eight metals and metalloids (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) highly associated with anthropogenic activities were quantified in tissue and shell of bivalves and gastropods (two feeding-habits) among 7 estuaries along the Southeastern China coast in the period 2016-2019. Results indicated that Cu and Zn in shellfish had the greatest loadings at 1,663 and 6,828 mg kg-1 dry mass in tissue and 387 and 151 mg kg-1 dry mass in shell, respectively, in the most developed Estuary Yong. Metal loadings in tissue and shell of bivalves (6 common species) and gastropods (3 common species) in the estuaries were highly associated with urbanization and socioeconomic indicators in their watersheds. The socioeconomic patterns had evident shellfish class-specification and metal-dependency due to the feeding-habit. The class-specification was confirmed by the fractionation of stable isotope compositions for the socioeconomic pattern of Pb loadings in both tissue and shell. In short, both shellfish class-specification and metal-dependency hinted that multi-bioindicators might be required for a comprehensive understanding of the estuarine environment quality, in particular at two dimensions of water and sediment.
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Affiliation(s)
- Xun Liu
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shen Yu
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| | - Peiji Chen
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bing Hong
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yan Zhang
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Xiaodan Lin
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Tao Ma
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tongtong Zhou
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yuehai Li
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
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Yap CK, Sharifinia M, Cheng WH, Al-Shami SA, Wong KW, Al-Mutairi KA. A Commentary on the Use of Bivalve Mollusks in Monitoring Metal Pollution Levels. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:3386. [PMID: 33805997 PMCID: PMC8061770 DOI: 10.3390/ijerph18073386] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/23/2021] [Accepted: 01/24/2021] [Indexed: 01/09/2023]
Abstract
The objective of this commentary is to promote the use of bivalves as biomonitors, which is a part of the continual efforts of the International Mussel Watch. This commentary is an additional discussion on "Bivalve mollusks in metal pollution studies: From bioaccumulation to biomonitoring" by Zuykov et al., published in Chemosphere 93, 201-208. The present discussion can serve as a platform for further insights to provide new thoughts and novel ideas on how to make better use of bivalves in biomonitoring studies. The certainty of better and more extensive applications of mollusks in environmental monitoring in the future is almost confirmed but more studies are urgently needed. With all the reported studies using bivalves as biomonitors of heavy metal pollution, the effectiveness of using Mussel Watch is beyond any reasonable doubts. The challenge is the development of more accurate methodologies for of heavy metal data interpretation, and the precision of the biomonitoring studies using bivalves as biomonitors, whether in coastal or freshwater ecosystems. Lastly, inclusion of human health risk assessment of heavy metals in commercial bivalves would make the research papers of high public interest.
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Affiliation(s)
- Chee Kong Yap
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia;
| | - Moslem Sharifinia
- Shrimp Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Bushehr 75169-89177, Iran;
| | - Wan Hee Cheng
- Faculty of Health and Life Sciences, Inti International University, Persiaran Perdana BBN, Nilai 71800, Negeri Sembilan, Malaysia;
| | - Salman Abdo Al-Shami
- Indian River Research and Education Center, IFAS, University of Florida, Fort Pierce, FL 34945, USA;
| | - Koe Wei Wong
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia;
| | - Khalid Awadh Al-Mutairi
- Department of Biology, Faculty of Science, University of Tabuk, P.O. Box 741, Tabuk 71491, Saudi Arabia;
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Meyer KW, Petersen SV, Lohmann KC, Blum JD, Washburn SJ, Johnson MW, Gleason JD, Kurz AY, Winkelstern IZ. Biogenic carbonate mercury and marine temperature records reveal global influence of Late Cretaceous Deccan Traps. Nat Commun 2019; 10:5356. [PMID: 31844055 PMCID: PMC6915775 DOI: 10.1038/s41467-019-13366-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 11/06/2019] [Indexed: 11/09/2022] Open
Abstract
The climate and environmental significance of the Deccan Traps large igneous province of west-central India has been the subject of debate in paleontological communities. Nearly one million years of semi-continuous Deccan eruptive activity spanned the Cretaceous-Paleogene boundary, which is renowned for the extinction of most dinosaur groups. Whereas the Chicxulub impactor is acknowledged as the principal cause of these extinctions, the Deccan Traps eruptions are believed to have contributed to extinction patterns and/or enhanced ecological pressures on biota during this interval of geologic time. We present the first coupled records of biogenic carbonate clumped isotope paleothermometry and mercury concentrations as measured from a broad geographic distribution of marine mollusk fossils. These fossils preserve evidence of simultaneous increases in coastal marine temperatures and mercury concentrations at a global scale, which appear attributable to volcanic CO2 and mercury emissions. These early findings warrant further investigation with additional records of combined Late Cretaceous temperatures and mercury concentrations of biogenic carbonate.
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Affiliation(s)
- Kyle W Meyer
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA.
| | - Sierra V Petersen
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA.
| | - Kyger C Lohmann
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - Joel D Blum
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - Spencer J Washburn
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - Marcus W Johnson
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - James D Gleason
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - Aaron Y Kurz
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA
| | - Ian Z Winkelstern
- Department of Earth and Environmental Sciences, University of Michigan, 1100N. University Ave., Ann Arbor, MI, 48109, USA.,Geology Department, Grand Valley State University, 1 Campus Drive, Allendale, MI, 49401, USA
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Binkowski ŁJ, Błaszczyk M, Przystupińska A, Ożgo M, Massanyi P. Metal concentrations in archaeological and contemporary mussel shells (Unionidae): Reconstruction of past environmental conditions and the present state. CHEMOSPHERE 2019; 228:756-761. [PMID: 31071562 DOI: 10.1016/j.chemosphere.2019.04.190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/10/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Freshwater mussels are widely used in the monitoring of pollution because they are filter-feeding, long-lived animals that tend to accumulate metals in their shells. The temporal scale of such studies can reach thousands of years, since the composition of shells preserves them against decay. This allows us to reconstruct past environmental conditions and to compare current environmental conditions to those prevalent thousands of years ago. Here we assessed metal concentrations (Ca, Cd, Cr, Cu, Fe, Hg, Ni, Pb and Zn) in recently harvested mussel shells and mussel shells found by archaeologists, and tested the hypothesis that levels of some metals are higher in today's shells, reflecting increasing anthropogenic impact. We observed lower metal concentrations (with the exception of Cd) in shells found by archaeologists (n = 35) than in recently harvested mussel shells (n = 14) (Unio crassus, Unio pictorum, Unio tumidus) in the same water bodies. There were no significant differences in metal levels among species in shells found by archaeologists, while in recently harvested mussels almost all metals for which we tested were found in their highest levels in Unio crassus. The results suggest that metal concentrations in prehistoric times were lower than today, which probably reflects human impact, rather than changes in the geochemical structure of rocks. The results also revealed that metal transfer between mussel shells and surrounding deposits does not occur. We therefore suggest that they might be successfully used as independent bioindicators.
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Affiliation(s)
- Łukasz J Binkowski
- Institute of Biology, Pedagogical University of Cracow, Podbrzezie 3, 31-054, Krakow, Poland.
| | - Martyna Błaszczyk
- Institute of Biology, Pedagogical University of Cracow, Podbrzezie 3, 31-054, Krakow, Poland.
| | - Anna Przystupińska
- Institute of Biology, Pedagogical University of Cracow, Podbrzezie 3, 31-054, Krakow, Poland.
| | - Małgorzata Ożgo
- Department of Evolutionary Biology, Kazimierz Wielki University, Ossolinskich 12, 85-064, Bydgoszcz, Poland.
| | - Peter Massanyi
- Department of Animal Physiology, Slovak University of Agriculture, Trieda Hlinku 2, 949 01, Nitra, Slovak Republic.
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Medas D, Carlomagno I, Meneghini C, Aquilanti G, Araki T, Bedolla DE, Buosi C, Casu MA, Gianoncelli A, Kuncser AC, Adrian Maraloiu V, De Giudici G. Zinc incorporation in marine bivalve shells grown in mine-polluted seabed sediments: a case study in the Malfidano mining area (SW Sardinia, Italy). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:36645-36660. [PMID: 30377963 DOI: 10.1007/s11356-018-3504-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Zinc incorporation into marine bivalve shells belonging to different genera (Donax, Glycymeris, Lentidium, and Chamelea) grown in mine-polluted seabed sediments (Zn up to 1% w/w) was investigated using x-ray diffraction (XRD), chemical analysis, soft x-ray microscopy combined with low-energy x-ray fluorescence (XRF) mapping, x-ray absorption spectroscopy (XAS), and transmission electron microscopy (TEM). These bivalves grew their shells, producing aragonite as the main biomineral and they were able to incorporate up to 2.0-80 mg/kg of Zn, 5.4-60 mg/kg of Fe and 0.5-4.5 mg/kg of Mn. X-ray absorption near edge structure (XANES) analysis revealed that for all the investigated genera, Zn occurred as independent Zn mineral phases, i.e., it was not incorporated or adsorbed into the aragonitic lattice. Overall, our results indicated that Zn coordination environment depends on the amount of incorporated Zn. Zn phosphate was the most abundant species in Donax and Lentidium genera, whereas, Chamelea shells, characterized by the highest Zn concentrations, showed the prevalence of Zn-cysteine species (up to 56% of total speciation). Other Zn coordination species found in the investigated samples were Zn hydrate carbonate (hydrozincite) and Zn phosphate. On the basis of the coordination environments, it was deduced that bivalves have developed different biogeochemical mechanisms to regulate Zn content and its chemical speciation and that cysteine plays an important role as an active part of detoxification mechanism. This work represents a step forward for understanding bivalve biomineralization and its significance for environmental monitoring and paleoreconstruction.
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Affiliation(s)
- Daniela Medas
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy.
| | - Ilaria Carlomagno
- Department of Sciences, University of Roma Tre, Rome, Italy
- Elettra-Sincrotrone Trieste, Basovizza, Trieste, Italy
| | | | | | - Tohru Araki
- Diamond Light Source, Diamond House, Harwell Science and Innovation Campus, Oxfordshire, Didcot, UK
| | | | - Carla Buosi
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy
| | - Maria Antonietta Casu
- UOS of Cagliari, National Research Council, Scientific and Technological Park of Sardinia POLARIS, Institute of Translational Pharmacology, Pula, Italy
| | | | - Andrei C Kuncser
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, Magurele, Romania
| | - V Adrian Maraloiu
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, Magurele, Romania
| | - Giovanni De Giudici
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy
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Kosnik MA, Kowalewski M. Understanding modern extinctions in marine ecosystems: the role of palaeoecological data. Biol Lett 2017; 12:rsbl.2015.0951. [PMID: 27048464 DOI: 10.1098/rsbl.2015.0951] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/08/2016] [Indexed: 11/12/2022] Open
Abstract
Because anthropogenic impacts on ecological systems pre-date the oldest scientific observations, historical documents and archaeological records, understanding modern extinctions requires additional data sources that extend further back in time. Palaeoecological records, which provide quantitative proxy records of ecosystems prior to human impact, are essential for understanding recent extinctions and future extinction risks. Here we critically review the value of the most recent fossil record in contributing to our understanding of modern extinctions and illustrate through case studies how naturally occurring death assemblages and Holocene sedimentary records provide context to the plight of marine ecosystems. While palaeoecological data are inherently restricted censuses of past communities (manipulative experiments are not possible), they yield quantitative records over temporal scales that are beyond the reach of ecology. Only by including palaeoecological data is it possible to fully assess the role of long-term anthropogenic processes in driving modern extinction risk.
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Affiliation(s)
- Matthew A Kosnik
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Michał Kowalewski
- Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, USA
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8
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Armenteros M, Díaz-Asencio M, Fernández-Garcés R, Hernández CA, Helguera-Pedraza Y, Bolaños-Alvarez Y, Agraz-Hernández C, Sanchez-Cabeza JA. One-century decline of mollusk diversity as consequence of accumulative anthropogenic disturbance in a tropical estuary (Cuban Archipelago). MARINE POLLUTION BULLETIN 2016; 113:224-231. [PMID: 27650117 DOI: 10.1016/j.marpolbul.2016.09.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
In order to infer changes in sediments and mollusk assemblages for the last century, we used biogeochemical data from two 210Pb dated cores collected in Sagua La Grande estuary, Cuban Archipelago. We found evidences of cumulative anthropogenic disturbance during the last century, causing considerable depletion of mollusk assemblage diversity and enhancement of the dominance of deposit feeding species. The sequence of impacts assessed was i) eutrophication due to nutrient releases from urban settlements, ii) habitat alteration due to water channeling and damming, and iii) mercury pollution. These successive impacts caused a steady diversity depletion from ca. 70 mollusk species in 1900 to less than five in 2010. Only two species persisted in the estuary: Nuculana acuta and Finella dubia. Hurricanes did not impact the molluscan fauna in the long term. The effects of the anthropogenic impacts suggest that the resilience of this estuarine system is compromised.
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Affiliation(s)
- Maickel Armenteros
- Centro de Investigaciones Marinas, Universidad de La Habana, 16 # 114, Playa, CP11300, Habana, Cuba.
| | - Misael Díaz-Asencio
- Centro de Estudios Ambientales de Cienfuegos, Carretera Castillo de Jagua km 1.5, Ciudad Nuclear, CP59350, Cienfuegos, Cuba; Instituto de Ecología, Pesquería y Oceanografía del Golfo de México (EPOMEX), Universidad Autónoma de Campeche, Mexico
| | - Raúl Fernández-Garcés
- Centro de Estudios Ambientales de Cienfuegos, Carretera Castillo de Jagua km 1.5, Ciudad Nuclear, CP59350, Cienfuegos, Cuba
| | - Carlos Alonso Hernández
- Centro de Estudios Ambientales de Cienfuegos, Carretera Castillo de Jagua km 1.5, Ciudad Nuclear, CP59350, Cienfuegos, Cuba
| | - Yusmila Helguera-Pedraza
- Centro de Estudios Ambientales de Cienfuegos, Carretera Castillo de Jagua km 1.5, Ciudad Nuclear, CP59350, Cienfuegos, Cuba
| | - Yoelvis Bolaños-Alvarez
- Centro de Estudios Ambientales de Cienfuegos, Carretera Castillo de Jagua km 1.5, Ciudad Nuclear, CP59350, Cienfuegos, Cuba
| | - Claudia Agraz-Hernández
- Instituto de Ecología, Pesquería y Oceanografía del Golfo de México (EPOMEX), Universidad Autónoma de Campeche, Mexico
| | - Joan-Albert Sanchez-Cabeza
- Unidad Académica Procesos Oceánicos y Costeros, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, 4510 Ciudad de México, Mexico
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Merschel G, Bau M. Rare earth elements in the aragonitic shell of freshwater mussel Corbicula fluminea and the bioavailability of anthropogenic lanthanum, samarium and gadolinium in river water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 533:91-101. [PMID: 26151653 DOI: 10.1016/j.scitotenv.2015.06.042] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/11/2015] [Accepted: 06/11/2015] [Indexed: 05/28/2023]
Abstract
High-technology metals - such as the rare earth elements (REE) - have become emerging contaminants in the hydrosphere, yet little is known about their bioavailability. The Rhine River and the Weser River in Germany are two prime examples of rivers that are subjected to anthropogenic REE input. While both rivers carry significant loads of anthropogenic Gd, originating from contrast agents used for magnetic resonance imaging, the Rhine River also carries large amounts of anthropogenic La and lately Sm which are discharged into the river from an industrial point source. Here, we assess the bioavailability of these anthropogenic microcontaminants in these rivers by analyzing the aragonitic shells of the freshwater bivalve Corbicula fluminea. Concentrations of purely geogenic REE in shells of comparable size cover a wide range of about one order of magnitude between different sampling sites. At a given sampling site, geogenic REE concentrations depend on shell size, i.e. mussel age. Although both rivers show large positive Gd anomalies in their dissolved loads, no anomalous enrichment of Gd relative to the geogenic REE can be observed in any of the analyzed shells. This indicates that the speciations of geogenic and anthropogenic Gd in the river water differ from each other and that the geogenic, but not the anthropogenic Gd is incorporated into the shells. In contrast, all shells sampled at sites downstream of the industrial point source of anthropogenic La and Sm in the Rhine River show positive La and Sm anomalies, revealing that these anthropogenic REE are bioavailable. Only little is known about the effects of long-term exposure to dissolved REE and their general ecotoxicity, but considering that anthropogenic Gd and even La have already been identified in German tap water and that anthropogenic La and Sm are bioavailable, this should be monitored and investigated further.
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Affiliation(s)
- Gila Merschel
- Department of Physics and Earth Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany.
| | - Michael Bau
- Department of Physics and Earth Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
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10
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Zuykov M, Pelletier E, Harper DAT. Bivalve mollusks in metal pollution studies: from bioaccumulation to biomonitoring. CHEMOSPHERE 2013; 93:201-8. [PMID: 23751124 DOI: 10.1016/j.chemosphere.2013.05.001] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 04/29/2013] [Accepted: 05/03/2013] [Indexed: 05/22/2023]
Abstract
Contemporary environmental challenges have emphasized the need to critically assess the use of bivalve mollusks in chemical monitoring (identification and quantification of pollutants) and biomonitoring (estimation of environmental quality). Many authors, however, have considered these approaches within a single context, i.e., as a means of chemical (e.g. metal) monitoring. Bivalves are able to accumulate substantial amounts of metals from ambient water, but evidence for the drastic effects of accumulated metals (e.g. as a TBT-induced shell deformation and imposex) on the health of bivalves has not been documented. Metal bioaccumulation is a key tool in biomonitoring; bioavailability, bioaccumulation, and toxicity of various metals in relation to bivalves are described in some detail including the development of biodynamic metal bioaccumulation model. Measuring metal in the whole-body or the tissue of bivalves themselves does not accurately represent true contamination levels in the environment; these data are critical for our understanding of contaminant trends at sampling sites. Only rarely has metal bioaccumulation been considered in combination with data on metal concentrations in parts of the ecosystem, observation of biomarkers and environmental parameters. Sclerochemistry is in its infancy and cannot be reliably used to provide insights into the pollution history recorded in shells. Alteration processes and mineral crystallization on the inner shell surface are presented here as a perspective tool for environmental studies.
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Affiliation(s)
- Michael Zuykov
- Institute des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski, Rimouski, 310, allée des Ursulines, QC, Canada G5L 3A1.
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11
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Lares ML, Rivero LE, Huerta-Diaz MA. Cd concentration in the soft tissue vs. the nacreous layer of Mytilus californianus. MARINE POLLUTION BULLETIN 2005; 50:1373-81. [PMID: 16005907 DOI: 10.1016/j.marpolbul.2005.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The soft tissue of Mytilus californianus has the capacity to decrease its Cd concentration in the order of days. However, for medium-term (months) pollution surveys it is necessary to find alternative structures capable of integrating Cd concentrations during longer periods of time. The recently deposited nacreous layer of the shell of M. californianus is proposed as such a structure. Daily variability of Cd concentration in the soft tissue and in the recently deposited nacreous layer of a natural population of mussels was compared during a period of 26 days in organisms collected from an upwelling zone of British Columbia. Statistical analysis of the Cd concentrations indicated that the nacreous layer presented less significant differences between days than the associated soft tissue. Only one shell sample showed significant differences in Cd concentrations, probably related to environmental conditions and stress arising from mussel population density. Experimental results carried out in the laboratory confirmed that the recently deposited nacreous layer of M. californianus is a better medium-term indicator of Cd in seawater, especially at low concentration exposures of this element, those similar to the ones encountered in natural environments.
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Affiliation(s)
- M L Lares
- Departamento de Oceanografía Biológica, Centro de Investigación Científica y de Educación Superior de Ensenada, B.C., 22800, México.
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