Airborne contamination by heavy metals and aluminum in the freshwater ecosystems of the Kola Subarctic region (Russia)

1995 ◽  
Vol 160-161 ◽  
pp. 715-727 ◽  
Author(s):  
T.I. Moiseenko ◽  
L.P. Kudryavtseva ◽  
I.V. Rodyushkin ◽  
V.A. Dauvalter ◽  
A.A. Lukin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Freshwater Ecosystems ◽  
Subarctic Region ◽  
Airborne Contamination

scholarly journals Microbial diversity in intensively farmed lake sediment contaminated by heavy metals and identification of microbial taxa bioindicators of environmental quality

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
María Custodio ◽  
Ciro Espinoza ◽  
Richard Peñaloza ◽  
Tessy Peralta-Ortiz ◽  
Héctor Sánchez-Suárez ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Microbial Diversity ◽  
Microbial Communities ◽  
Lake Sediments ◽  
Environmental Quality ◽  
Heavy Metal Contamination ◽  
Current Knowledge ◽  
Freshwater Ecosystems ◽  
Monitoring And Control

AbstractThe cumulative effects of anthropogenic stress on freshwater ecosystems are becoming increasingly evident and worrisome. In lake sediments contaminated by heavy metals, the composition and structure of microbial communities can change and affect nutrient transformation and biogeochemical cycling of sediments. In this study, bacterial and archaeal communities of lake sediments under fish pressure contaminated with heavy metals were investigated by the Illumina MiSeq platform. Despite the similar content of most of the heavy metals in the lagoon sediments, we found that their microbial communities were different in diversity and composition. This difference would be determined by the resilience or tolerance of the microbial communities to the heavy metal enrichment gradient. Thirty-two different phyla and 66 different microbial classes were identified in sediment from the three lagoons studied. The highest percentages of contribution in the differentiation of microbial communities were presented by the classes Alphaproteobacteria (19.08%), Cyanophyceae (14.96%), Betaproteobacteria (9.01%) y Actinobacteria (7.55%). The bacteria that predominated in sediments with high levels of Cd and As were Deltaproteobacteria, Actinobacteria, Coriobacteriia, Nitrososphaeria and Acidobacteria (Pomacocha), Alphaproteobacteria, Chitinophagia, Nitrospira and Clostridia (Tipicocha) and Betaproteobacteria (Tranca Grande). Finally, the results allow us to expand the current knowledge of microbial diversity in lake sediments contaminated with heavy metals and to identify bioindicators taxa of environmental quality that can be used in the monitoring and control of heavy metal contamination.

Lagoon Treatment of Municipal Sewage Effluent in a Subarctic Region of Canada (Yellowknife, N.W.T.)

1986 ◽  
Vol 18 (2) ◽  
pp. 129-139 ◽  
Author(s):  
Ranjit N. Soniassy ◽  
Rodney Lemon
Keyword(s):  
Heavy Metals ◽  
Fecal Coliform ◽  
Total Coliform ◽  
Cold Climate ◽  
Municipal Sewage ◽  
Subarctic Region ◽  
Treated Effluent ◽  
Microbiological Parameters ◽  
Subarctic Climate ◽  
One Year

The performance of a municipal sewage lagoon in a subarctic climate (Yellowknife, N.W.T.) was evaluated over a one year period to determine its seasonal treatment capabilities. Raw sewage (influent) and treated effluent were analysed for several physicochemical and microbiological parameters. Effective removals of BOD5, total coliform, fecal coliform, fecal streptococci and heavy metals (Cu, Ni, Zn, Cd, Pb and Hg) were obtained from mid-June to mid-September. No evidence of treatment was observed when the lagoon was under ice cover (October to May). The concentrations of several heavy metals (Cu, Zn and Pb) were found to decrease gradually, reaching a low in summer, before rising again in the fall and winter. A system of managing cold climate lagoons, based on ambient temperature, is presented.

Heavy Metal Contents in Invertebrates of the Danube River

1990 ◽  
Vol 22 (5) ◽  
pp. 119-125 ◽  
Author(s):  
N. Yu Yevtushenko ◽  
N. V. Bren ◽  
Yu M. Sytnik
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Species Differences ◽  
Freshwater Ecosystems ◽  
Danube River ◽  
Anthropogenic Influences ◽  
Primary Stage ◽  
The Danube River ◽  
Metal Contents ◽  
Different Levels

The paper presents results of heavy metals content in hydrobionts and bioindication of heavy metals primary stage entrance in freshwater ecosystems, The nature investigations which were made on Danube reaches with different levels of anthropogenic influences showed the heavy metals content in invertebrates is determined by changability of heavy metals concentration in water and sediments and their species differences.

scholarly journals Lead (Pb2+) causes chlorophyll related changes and oxidative damage in Chlorella ellipsoides (Chlorophyceae)

2019 ◽  
Vol 6 (14) ◽  
pp. 605-613
Author(s):  
Matouke M. Moise
Keyword(s):  
Heavy Metals ◽  
Chlorophyll A ◽  
Aquatic Ecosystems ◽  
Field Studies ◽  
Freshwater Ecosystems ◽  
Health Concern ◽  
Freshwater Biodiversity ◽  
Aquatic Biodiversity ◽  
Chlorophyll A And B ◽  
Potential Impact

The increasing production of anthropological wastes containing heavy metals has resulted to their discharge and contamination into freshwater ecosystems. Hence, the effects of heavy metals are of health concern for aquatic biodiversity. This study investigated the short term effects of Pb2+ (0.0, 10, 20, 40, 60, 80 and 100 µg.L-1) on the biomass (cell density, chlorophyll a, b) and antioxidant (catalase (CAT), superoxide dismutase (SOD), guiacol peroxidase (GPx), glutathione reductase (GRx), and malondialdehyde (MDA)). Chlorella ellipsoides (Chlorophyceae) was sensitive to Pb2+, a significant decrease (p < 0.05) of chlorophyll a and b was observed with increasing concentrations of Pb2+. Antioxidant Catalase, SOD, GPx and GRx relatively decreased significantly (p < 0.05) after exposure of microalga to Pb2+. However, MDA increased significantly (p < 0.05) after microalgae was exposed to Pb2+. The finding of this study indicates that exogenous concentrations are harmful for the welfare of C. ellipsoides. This study is important as it demonstrates the potential impact of Pb2+ on microalgae. Field studies in African freshwater biodiversity and monitoring of aquatic ecosystems are recommended to assess the level and impact of Pb2+ in aquatic ecosystems.

scholarly journals Wild and Farmed Arctic Charr as a Tourism Product in an Era of Climate Change

2021 ◽  
Vol 5 ◽  
Author(s):  
Guðrún Helgadóttir ◽  
Hans Renssen ◽  
Tom Robin Olk ◽  
Tone Jøran Oredalen ◽  
Laufey Haraldsdóttir ◽  
...  
Keyword(s):  
Climate Change ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Ecological Factors ◽  
Freshwater Ecosystems ◽  
Tourism Industry ◽  
The Arctic ◽  
Future Scenarios ◽  
Subarctic Region ◽  
Tourism Product

The topic investigated is the social-ecological system of Arctic charr (Salvelinus alpinus) fishing and aquaculture as a tourism product in an era of climate change. Arctic charr is a resilient salmonid species that was traditionally an important part of the sustenance economy in Arctic and Subarctic communities as a source of fresh food throughout the year. Arctic charr populations have declined in recent years, in part due to climate change. These changes in the freshwater ecosystems in turn affect the cultural and economic traditions of freshwater fishing and consumption. This development has consequences for the tourism industry as hunting, fishing and consuming local and traditional food is important in branding tourism destinations. Fisheries are no longer the source of this important ingredient in the Nordic culinary tradition, instead aquaculture production supplies nearly all the Arctic charr consumed. In this paper, we pool the resources of an interdisciplinary team of scholars researching climate change, freshwater ecology, aquaculture and tourism. We integrate knowledge from these fields to discuss likely future scenarios for Arctic charr, their implications for transdisciplinary social ecosystem approaches to sustainable production, marketing and management, particularly how this relates to the growing industry of tourism in the Nordic Arctic and Subarctic region. We pose the questions whether Arctic Charr will be on the menu in 20 years and if so, where will it come from, and what consequences does that have for local food in tourism of the region? Our discussion starts with climate change and the question of how warm it is likely to get in the Nordic Arctic, particularly focusing on Iceland and Norway. To address the implications of the warming of lakes and rivers of the global north for Arctic charr we move on to a discussion of physiological and ecological factors that are important for the distribution of the species. We present the state of the art of Arctic charr aquaculture before articulating the importance of the species for marketing of local and regional food, particularly in the tourism market. Finally, we discuss the need for further elaboration of future scenarios for the interaction of the Arctic charr ecosystem and the economic trade in the species and draw conclusions about sustainable future development.

scholarly journals Biotransportation of Heavy Metals in Eichhornia crassipes (MART.) Solms. Using X-Ray Fluorescence Spectroscopy

2015 ◽  
Vol 10 (1) ◽  
pp. 09-21
Author(s):  
Hiren Soni ◽  
Sheju Thomas
Keyword(s):  
Heavy Metals ◽  
Eichhornia Crassipes ◽  
Aquatic Macrophyte ◽  
Translocation Factor ◽  
Active Species ◽  
Freshwater Ecosystems ◽  
Bioaccumulation Factor ◽  
Toxic Heavy Metals ◽  
X Ray ◽  
Freshwater Macrophyte

Biomonitoring study of heavy metals was done at pilgrimage freshwater ecosystems of Central Gujarat, India, to ascertain the degree of 17 metals. The study focused on the assessment of available metals in Eichhornia crassipes (Mart.) Solms., collected from sacred palustrine habitat (Dakor Sacred Wetland – DSW) of Gujarat, to be used as a biomonitor (active) species, in comparison with sediment (abiotic monitor) for metal pollution. The results were obtained by analyzing elemental composition of rhizome, tuber, stem and leaves of native aquatic freshwater macrophyte (Eichhornia crassipes) along with bottom sediments for 17 heavy metals (Ti, Cr, Mn, Fe, Ni, Cu, Zn, Br, Rb, Sr, Y, Zr, Nb, Ba, Pb, Sm, Ir) using Wavelength Dispersive X-Ray Fluorescence (WD-XRF) (Omania Software). The highest concentrations were observed in rhizome (12) in assay species of aquatic macrophyte, followed by tuber and stem (10 each), and least content was observed in leaf (8). Toxic heavy metals (Ti, Mn, Fe, Zn, Br, Sr, Zr, Pb) were detected, prone to cardiac, respiratory, musculo-skeletal and hepatic interferences in indigenous human clusters in and around studied wetland. Eichhornia crassipes was proved to be the best phytoaccumaltor species for heavy metals, exhibited by highest translocation factor for Zn, Sr, Zr, and Pb, and bioaccumulation factor for Mn, Rb, Sr and Fe metals. Present research indicates that E. crassipes (Mart.) Solms. is better remediator species for mobility of Pb, Zr and Sr metals. Thus, Eichhornia crassipes can be used for an effective abatement of contaminated aquatic sites.

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