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https://www.readbyqxmd.com/read/28323394/feeding-preference-as-a-main-determinant-of-microscale-patchiness-among-terrestrial-nematodes
#1
Casper W Quist, Gerrit Gort, Christian Mulder, Ruud H P Wilbers, Aad J Termorshuizen, Jaap Bakker, Johannes Helder
Soil biota are responsible for essential ecosystem services such as carbon storage, nutrient cycling and water retention. However, assessment of the condition of soil biota is hampered by an overwhelming level of diversity. With representatives in all trophic levels of the food web, nematode communities can be used as bio-indicators. Accurate assessment of nematode assemblages requires insight in the distribution of specimens with distinct food preferences. With the availability of taxon-specific quantitative-PCR assays, distribution patterns of multiple nematode groups can be investigated simultaneously...
March 21, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28319885/bacterioplankton-assembly-and-interspecies-interaction-indicating-increasing-coastal-eutrophication
#2
Wenfang Dai, Jinjie Zhang, Qichao Tu, Ye Deng, Qiongfen Qiu, Jinbo Xiong
Anthropogenic perturbations impose negative effects on coastal ecosystems, such as increasing levels of eutrophication. Given the biogeochemical significance of microorganisms, understanding the processes and mechanisms underlying their spatial distribution under changing environmental conditions is critical. To address this question, we examined how coastal bacterioplankton communities respond to increasing eutrophication levels created by anthropogenic perturbations. The results showed that the magnitude of changes in the bacterioplankton community compositions (BCCs) and the importance of deterministic processes that constrained bacterial assembly were closely associated with eutrophication levels...
March 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28284585/marine-environment-status-assessment-based-on-macrophytobenthic-plants-as-bio-indicators-of-heavy-metals-pollution
#3
Tamara Zalewska, Beata Danowska
The main aim of study was to develop the environmental quality standards (EQSMP) for selected heavy metals: Pb, Cd, Hg and Ni bioaccumulated in the tissues of marine macrophytobenthic plants: Chara baltica, Cladophora spp., Coccotylus truncatus, Furcellaria lumbricalis, Polysiphonia fucoides, Stuckenia pectinata and Zanichellia palustris, collected in designated areas of the southern Baltic Sea in period 2008-2015. The calculated concentration ratios (CR), which attained very high values: 10(4)Lkg(-1) for lead, 10(3)Lkg(-1) for nickel and mercury and even 10(5)Lkg(-1) for cadmium formed the basis for the determination of EQSMP values...
March 8, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28273529/heavy-metals-in-human-teeth-dentine-a-bio-indicator-of-metals-exposure-and-environmental-pollution
#4
Khandoker Asaduzzaman, Mayeen Uddin Khandaker, Nurul Atiqah Binti Baharudin, Yusoff Bin Mohd Amin, Mohideen Salihu Farook, D A Bradley, Okba Mahmoud
With rapid urbanization and large-scale industrial activities, modern human populations are being increasingly subjected to chronic environmental heavy metal exposures. Elemental uptake in tooth dentine is a bioindicator, the uptake occurring during the formation and mineralization processes, stored to large extent over periods of many years. The uptake includes essential elements, most typically geogenic dietary sources, as well as non-essential elements arising through environmental insults. In this study, with the help of the Dental Faculty of the University of Malaya, a total of 50 separate human teeth were collected from dental patients of various ethnicity, age, gender, occupation, dietary habit, residency, etc...
February 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/28265879/pinus-sylvestris-as-a-bio-indicator-of-territory-pollution-from-aluminum-smelter-emissions
#5
Olga Vladimirovna Kalugina, Tatiana Alekseevna Mikhailova, Olga Vladimirovna Shergina
The study demonstrates the efficiency of using Pinus sylvestris L. as a bio-indicator of polluting substances that enter the environment with the emission of a large aluminum smelter. Recent research has demonstrated that pollution from aluminum smelter emissions covers a vast territory. The highest content of polluting elements is registered at a distance of 3 km from the smelter, with maximum concentrations found in the industrial zone (0.5 km from the smelter). The farther from the aluminum smelter, the lower the amount of polluting elements in the needles, although the F level still exceeds the background values at a distance of about 60 km from the source, the levels of Zn, Pb, and Cd up to 50 km, S up to 40 km, and Fe and Cu up to 35 km mostly in north-eastern and south-eastern directions correlating with prevailing atmospheric transfer of the emissions...
March 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28265694/microbial-communities-as-environmental-indicators-of-ecological-disturbance-in-restored-carbonate-fen-results-of-10%C3%A2-years-of-studies
#6
Tomasz Mieczan, Monika Tarkowska-Kukuryk
Interactions between bacteria and protists are essential to the ecosystem ecology of fens. Until now, however, there has been almost no information on how restoration procedures in carbonate fens affect the functioning of microbial food webs. Changes in vegetation patterns resulting from restoration may take years to be observed, whereas microbial processes display effects even after short-term exposure to changes in environmental conditions caused by restoration. Therefore, microbial processes and patterns can be used as sensitive indicators of changes in environmental conditions...
March 6, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28249748/pyrosequencing-based-assessment-of-microbial-community-shifts-in-leachate-from-animal-carcass-burial-lysimeter
#7
Hyun Young Kim, Jiyoung Seo, Tae-Hun Kim, Bomi Shim, Seok Mun Cha, Seungho Yu
This study examined the use of microbial community structure as a bio-indicator of decomposition levels. High-throughput pyrosequencing technology was used to assess the shift in microbial community of leachate from animal carcass lysimeter. The leachate samples were collected monthly for one year and a total of 164,639 pyrosequencing reads were obtained and used in the taxonomic classification and operational taxonomy units (OTUs) distribution analysis based on sequence similarity. Our results show considerable changes in the phylum-level bacterial composition, suggesting that the microbial community is a sensitive parameter affected by the burial environment...
February 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28236707/effect-of-landscape-tree-cover-sex-and-season-on-the-bioaccumulation-of-persistent-organochlorine-pesticides-in-fruit-bats-of-riparian-corridors-in-eastern-mexico
#8
Carolina Valdespino, Vinicio J Sosa
Riparian forests are recognized as important ecosystems for biodiversity conservation in transformed landscapes. Many animal species that use this type of vegetation facilitate its recovery through pollination and seed dispersal. In landscapes dominated by agrosystems and cattle ranching, persistent organochlorine pesticides (OCPs) in the riparian system may have an effect on the physiology and fitness of animals. In this study, we measured bioaccumulation of OCPs in the most abundant frugivorous bat, Sturnira hondurensis, from the upper part of La Antigua basin, Veracruz, Mexico and, from these data, estimated accumulation by the frugivorous bat community of riparian forests in contrasting, transformed (TL) and forested (FL) landscapes...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28170180/therapeutic-prospective-of-infused-allogenic-cultured-mesenchymal-stem-cells-in-traumatic-brain-injury-mice-a-longitudinal-proton-magnetic-resonance-spectroscopy-assessment
#9
Sushanta Kumar Mishra, Poonam Rana, Subash Khushu, Gurudutta Gangenahalli
Improved therapeutic assessment of experimental traumatic brain injury (TBI), using mesenchymal stem cells (MSCs), would immensely benefit its therapeutic management. Neurometabolite patterns at injury site, measured with proton magnetic resonance spectroscopy (1H-MRS) after MSCs transplantation, may serve as a bio-indicator of the recovery mechanism. This study used in vivo magnetic resonance imaging and 1H-MRS to evaluate the therapeutic prospects of implanted MSCs at injury site in experimental mice longitudinally up to 21 days...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28153497/benthic-foraminifera-as-bio-indicators-of-anthropogenic-impacts-in-coastal-environments-acqua-dei-corsari-area-case-study-palermo-italy
#10
Marianna Musco, Angela Cuttitta, Erica Bicchi, Enza Maria Quinci, Mario Sprovieri, Giorgio Tranchida, Luigi Giaramita, Anna Traina, Daniela Salvagio Manta, Serena Gherardi, Pietro Mercurio, Angelo Siragusa, Salvatore Mazzola
This study investigates living benthic foraminiferal assemblages as bio-indicators of anthropogenic activities in a coastal area within the Gulf of Palermo (Sicily, Italy), affected by industrial and urban activities, and evaluates the environmental quality through the calibration of a Tolerant Species index (%TSstd). Sediments from 6 stations were sampled along a bathymetric transect from the coast to offshore. Sediment grain size, TOC, major, minor and trace elements and polycyclic aromatic hydrocarbons (PAHs) were compared to benthic foraminiferal assemblages and species at each station...
January 30, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28137326/principal-determinants-of-species-and-functional-diversity-of-carabid-beetle-assemblages-during-succession-at-post-industrial-sites
#11
J Sipos, J Hodecek, T Kuras, A Dolny
Although ecological succession is one of the principal focuses of recent restoration ecology research, it is still unclear which factors drive this process and positively influence species richness and functional diversity. In this study we sought to elucidate how species traits and functional diversity change during forest succession, and to identify important factors that determine the species in the observed assemblages. We analyzed species richness and functional diversity of ground beetle assemblages in relation to succession on post-industrial localities after habitat deterioration caused by spoil deposition...
January 31, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28121271/pesticide-contaminants-in-selected-species-of-edible-wild-mushrooms-from-the-north-eastern-part-of-poland
#12
Michalina Gałgowska, Renata Pietrzak-Fiećko
The aim of this study was to determine the level of chlorinated hydrocarbon residues in selected edible mushrooms from north-eastern Poland. The experiment was carried out on 45 samples consisting of 15 fruiting bodies each of the following species: Boletus edulis, Imleria badia and Cantharellus cibarius. Dried samples were subjected to extraction of lipids with a Soxhlet and a standard procedure-based on the decomposition of lipids by concentrated sulfuric acid and the release of organic insecticides to the hexane layer-was used to determine chlorinated hydrocarbons...
March 4, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28061409/air-pollution-tolerance-index-of-plants-around-brick-kilns-in-rawalpindi-pakistan
#13
Khanoranga Achakzai, Sofia Khalid, Muhammad Adrees, Aasma Bibi, Shafaqat Ali, Rab Nawaz, Muhammad Rizwan
In any contaminated environment, the sensitive plant species can serve as bio-indicator of air pollution while tolerant plant species can act as a sink for air pollutants. Air pollution tolerance index (APTI) is an important tool to screen out plants based on their tolerance or sensitivity level to different air pollutants. The present study was aimed to identify the sensitive and tolerant plant species in the vicinity of brick kilns in the Rawalpindi city. To determine the susceptibility level of the selected plant species, four biochemical parameters, ascorbic acid, total chlorophyll content, relative water content and pH of leaf extract, were assessed and APTI was calculated...
April 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27967301/analysis-of-hematologic-alterations-immune-responses-and-metallothionein-gene-expression-in-nile-tilapia-oreochromis-niloticus-exposed-to-silver-nanoparticles
#14
Kubpaphas Thummabancha, Nuttaphon Onparn, Prapansak Srisapoome
In this study, Nile tilapia (Oreochromis niloticus) fingerlings were used as a model to examine acute and chronic toxicity of silver nanoparticles (AgNP). Expression levels of metallothionein (MT) transcripts in fish exposed to 0, 1 or 100 mg AgNP/kg fish were investigated by quantitative real-time RT-PCR. The results showed MT expression levels were significantly decreased 0.3-0.7-fold in the liver and spleen of fish exposed to 1 or 100 mg AgNP/kg after 6-48 h. In contrast, during this period, MT mRNA expression levels were increased 2-3-fold in the head kidney of the fish exposed to either level of AgNP...
November 2016: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/27886534/differences-in-the-response-of-soil-dehydrogenase-activity-to-cd-contamination-are-determined-by-the-different-substrates-used-for-its-determination
#15
Xiangping Tan, Yanju Liu, Kaihong Yan, Ziquan Wang, Guannan Lu, Yike He, Wenxiang He
Dehydrogenase activity (DHA) is an important indicator of heavy metal toxicity in contaminated soils. Different instances of DHA were determined using various substrates and which could affect the description of heavy metal toxicity. Currently, too few investigations have been done on selecting appropriate substrates. This study employed indoor simulation to determine soil DHA and its response to external cadmium (Cd) using two substrates (TTC and INT). Hormesis for DHA obtained using the TTC method (DHA-TTC) in low Cd concentration was observed which was quickly inhibited in high Cd concentration...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27817145/fish-scales-as-a-non-lethal-tool-of-the-toxicity-of-wastewater-from-the-river-chenab
#16
Tayyaba Sultana, Amir Siddique, Salma Sultana, Shahid Mahboob, Khalid Al-Ghanim, Z Ahmed
Water pollution is gradually increasing in natural waters through anthropogenic activities. This study aimed to use fish scales as a bio-indicator of pollution, along with water quality parameters, and the assessment and detection of selected heavy metals in water samples collected from the River Chenab, including the Chakbandi drain that gathers domestic sewage waste and industrial effluents from Faisalabad and deposits it into this freshwater body. All water quality parameters (pH, total dissolved solids (TDS), total suspended solids (TSS), salinity, conductivity, biochemical oxygen demand (BOD), chemical oxygen demand (COD), phenols and sulphates) and concentrations of selected heavy metals (Cd, Cu, Mn, Pb and Cr) were found to be considerably higher than permissible limits as defined by the WHO, and therefore capable of causing ill health effects in aquatic organisms...
November 5, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27813399/analysis-of-technetium-species-and-fractions-in-natural-seaweed-using-biochemical-separation-and-icp-ms-measurement
#17
Keliang Shi, Xiaolin Hou, Jixin Qiao, Xuejie Sun, Per Roos, Wangsuo Wu
An extremely high accumulation and retention of technetium in marine plants, especially brown seaweed, makes it a unique bioindicator of technetium. In the present work, a novel approach was developed for the speciation analysis of technetium in seaweed, wherein a series of biochemical separations was exploited to isolate different species of technetium. Inductively coupled plasma mass spectrometry (ICP-MS) was applied for the measurement of (99)Tc after thorough radiochemical preconcentration and purification...
December 6, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27750119/cytotoxicity-haemolymphatic-parameters-and-oxidative-stress-following-exposure-to-sub-lethal-concentrations-of-quaternium-15-in-mytilus-galloprovincialis
#18
Caterina Faggio, Maria Pagano, Roberto Alampi, Irene Vazzana, Maria Rosa Felice
The presence of a xenobiotic in the environment can often represent a risk for living organisms. Quaternium-15, a preservative, is one of the most used substances and is added to several cosmetics and other industrial products. For this reason,kwowing the bio-indicator of the marine environment, the toxicological effects potentially elicited by this preservative on the marine invertebrate Mytilus galloprovincialis were studied. The results of this work confirm that quaternium-15, used at 0.1 and 1mg/l concentrations, while metabolized in M...
November 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27745975/structuring-factors-of-the-spatio-temporal-variability-of-macrozoobenthos-assemblages-in-a-southern-mediterranean-lagoon-how-useful-for-bioindication-is-a-multi-biotic-indices-approach
#19
Ines Khedhri, Ahmed Afli, Lotfi Aleya
The authors investigated the impact of the extension of the El Kantra Channel on the composition and structure of macrobenthic assemblages in Boughrara Lagoon (Gulf of Gabes, Tunisia along with the use of 4 biotic indices (AMBI, BENTIX, M-AMBI and TUBI). Thirteen stations were sampled seasonally in 2012-2013. Forty-one species were found in 2012-2013 not recorded in 2009-2010, including 20 species of polychaetes belonging to the trophic groups of deposit-feeders and carnivores which are expected to increase in areas disturbed by organic pollution...
January 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27729723/bio-indices-for-2-4-d-sensitivity-between-two-plant-species-azolla-pinnata-r-br-and-vernonia-cinerea-l-with-their-cellular-responses
#20
Arnab Kumar De, Narottam Dey, Malay Kumar Adak
In the present experiment a pteridophytic species Azolla and an angiospermic species Vernonia were evaluated on the basis of cellular reactivity for herbicidal action through ongoing concentrations. Initially, both the species recorded a significant activity of IAA-oxidase as mark of IAA metabolism with herbicidal sensitivity. Still, Vernonia species were more affected on 2,4-D mediated auxin catabolism. The loss of auxin concentrations on the tissues by 2,4-D reaction was also reflected on growth parameters including relative growth rate and chlorophyll biosynthesis...
July 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
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