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C G Alimba, A M Aladeyelu, I A Nwabisi, A A Bakare
Amphibians are increasingly being used as bio-indicator of contamination in ecosystems due to their sensitivity to xenobiotics in the environment. Cadmium and lead compounds, ubiquitous mutagens and carcinogens, are capable of eliciting genome instability in adult toads which may enhance amphibian decline. Micronucleus cytome (MN-cyt) assay, a comprehensive cytogenetic test for the assessment of genome instability induced by xenobiotics in organisms, was utilized in the differential cytogenotoxic evaluation of Cd and Pb in adult Amietophrynus regularis...
2018: EXCLI Journal
Idrissa Kaboré, O Moog, A Ouéda, J Sendzimir, R Ouédraogo, W Guenda, A H Melcher
Awareness of sustainable management of water and its biological resources is rising in West Africa, but application of effective tools for biomonitoring and detecting habitats at risk in aquatic ecosystems is limited. In this study, we provide key environmental descriptors to characterize reference sites by applying the following "a priori criteria" (physical and chemical, hydro-morphological, and land use parameters) by exploring their potential to determine suitable reference sites. Using data collected from 44 sites, we identified 37 criteria that reliably identify reference conditions in semi-arid rivers by reflecting the impacts of multiple pressures ranging from low to very high intensity of human uses and impairments...
December 2, 2017: Environmental Monitoring and Assessment
Yoshitaka Oishi
Atmospheric pollution by polycyclic aromatic hydrocarbons (PAHs) has become a serious problem, especially in Asia, as PAHs can severely affect ecologically important mountainous areas. Using pine needles and mosses as bio-indicators, this study examined PAH pollution in a mountainous study area and evaluated the influence of transboundary PAHs. PAHs in urban areas were also evaluated for comparison. The study sites were alpine areas and urban areas (inland or coastal cities) across central Japan, in the easternmost part of Asia where atmospheric pollutants are transported from mainland Asia...
November 27, 2017: Environmental Pollution
Yu Xu, Huayun Xiao, Hui Guan, Chaojun Long
Moss (as a reference material) and camphor (Cinnamomum Camphora) leaf, branch bark and bark samples were systematically collected across an urban-rural gradient in Guiyang (SW China) to determine the efficacy of using these bio-indicators to evaluate nitrogen (N) pollution. The tissue N concentrations (0.13%-2.70%) and δ(15)N values (-7.5‰ to +9.3‰) of all of these bio-indicators exhibited large spatial variations, as they recorded higher values in urban areas that quickly decreased with distance from the city center; moreover, both soil N concentrations and soil δ(15)N values were found no significant differences within each 6 km from the urban to the rural area...
October 16, 2017: Environmental Pollution
David Helman
Land surface phenology (LSP) provides bio-indication of ongoing climate change. It uses space-borne greenness proxies to monitor plant phenology at the landscape level from the regional to global scale. However, several unconsidered methodological and observational -related limitations may lead to misinterpretation of the satellite-derived signals. For instance, changes in species composition within a pixel could result in a change in the time series of the greenness proxy, due to the distinct phenology of the plant species involved...
October 13, 2017: Science of the Total Environment
Esther U Kadiene, Capucine Bialais, Baghdad Ouddane, Jiang-Shiou Hwang, Sami Souissi
This study determined the effect of cadmium (Cd) toxicity comparatively on two copepods, Eurytemora affinis (Poppe 1880) from a temperate region (Seine Estuary, France) and Pseudodiaptomus annandalei (Sewell 1919) from a subtropical region (Danshuei Estuary, Taiwan), according to their sex and reproductive stages. In addition, the effect of Cd to their life cycle traits was quantified. In the first experiment, both copepod sexes were exposed to 40, 80, 150, 220, and 360 µg/L of Cd and a control cultured in salinity 15, except that the temperature was 18 °C for E...
November 2017: Ecotoxicology
Michael Sievers, Robin Hale, Kirsten M Parris, Stephen E Swearer
Many wetlands harbour highly diverse biological communities and provide extensive ecosystem services; however, these important ecological features are being altered, degraded and destroyed around the world. Despite a wealth of research on how animals respond to anthropogenic changes to natural wetlands and how they use created wetlands, we lack a broad synthesis of these data. While some altered wetlands may provide vital habitat, others could pose a considerable risk to wildlife. This risk will be heightened if such wetlands are ecological traps - preferred habitats that confer lower fitness than another available habitat...
September 19, 2017: Biological Reviews of the Cambridge Philosophical Society
Doyun Shin, Yunho Lee, Jeonghyun Park, Hee Sun Moon, Sung Pil Hyun
Changes in microbial community induced by acid shock were studied in the context of potential release of acids to the environment due to chemical accidents. The responses of microbial communities in three different soils to the exposure to sulfuric or hydrofluoric acid and to the subsequent neutralization treatment were investigated as functions of acid concentration and exposure time by using 16S-rRNA gene based pyrosequencing and DGGE (Denaturing Gradient Gel Electrophoresis). Measurements of soil pH and dissolved ion concentrations revealed that the added acids were neutralized to different degrees, depending on the mineral composition and soil texture...
December 15, 2017: Journal of Environmental Management
Asli Kacar, Burcu Omuzbuken
The presence of fecal bacteria in seawater is one of the most important bio-indicator parameters of fecal pollution. In this study, the Bay of İzmir (in the eastern Aegean Sea), which is a critical area because of its relationship with marine transportation and industrial and commercial activities, was evaluated for its microbiological and physicochemical parameters through a monitoring program. The data were obtained from seasonally assembled surface seawater samples from 2015 to 2017 at 23 sampling stations...
August 29, 2017: Marine Pollution Bulletin
Ahmad Jammal, Michel Bariche, Heinrich Zu Dohna, Zakaria Kambris
BACKGROUND: Microflora of the gastrointestinal tract plays important roles in food digestion, nutrient absorption and in host defense against ingested pathogens. Several studies have focused on the microflora of farmed fishes, but the gut flora of wild fishes remains poorly characterized. The aim of this work was to provide an overview of the bacteria colonizing the gut of wild-caught fishes and to determine whether some bacterial species can be pathogenic. RESULTS: We isolated cultivable bacteria from fifteen wild-caught Mediterranean fish species corresponding to different habitat, diet and origin...
May 2017: Current Nutrition and Food Science
Jerzy Falandysz, Atindra Sapkota, Anna Dryżałowska, Małgorzata Mędyk, Xinbin Feng
The aim of the study was to characterise the multi-elemental composition and associations between a group of 32 elements and 16 rare earth elements collected by mycelium from growing substrates and accumulated in fruiting bodies of Macrolepiota procera from 16 sites from the lowland areas of Poland. The elements were quantified by inductively coupled plasma quadrupole mass spectrometry using validated method. The correlation matrix obtained from a possible 48 × 16 data matrix has been used to examine if any association exits between 48 elements in mushrooms foraged from 16 sampling localizations by multivariate approach using principal component (PC) analysis...
June 2017: Environmental Science and Pollution Research International
Fatima Z Maghnia, Hervé Sanguin, Younes Abbas, Marcello Verdinelli, Benaissa Kerdouh, Naima El Ghachtouli, Enrico Lancellotti, Salah Eddine Bakkali Yakhlef, Robin Duponnois
The cork oak forest is an ecosystem playing a major role in Moroccan socio-economy and biodiversity conservation. However, this ecosystem is negatively impacted by extensive human- and climate-driven pressures, causing a strong decrease in its distribution and a worsening of the desertification processes. This study aims at characterising the impact of cork oak forest management on a major actor of its functioning, the ectomycorrhizal (EcM) fungal community associated with Quercus suber, and the determination of EcM bio-indicators...
May 2017: Comptes Rendus Biologies
Rewaida Abdel-Gaber, Fathy Abdel-Ghaffar, Mohamed Abdallah Shazly, Kareem Morsy, Saleh Al Quraishy, Sanna Mohamed, Heinz Mehlhorn
Parasites are one of the most serious limiting factors in aquaculture. The Electric catfish Malapterurus electricus was subjected to study the prevalence and mean intensity of parasitic infections throughout the whole year of 2015. Heavy metals accumulation in host fish and parasites were determined in relation to water quality and sediments of two different sites of Lake Manzala (Manzala and Bahr El-Baqar), Egypt. A total of 100 specimens of Electric catfish were collected and examined for the presence of helminth parasites...
June 1, 2017: Acta Parasitologica
Karen A Bjorndal, Alan B Bolten, Milani Chaloupka, Vincent S Saba, Cláudio Bellini, Maria A G Marcovaldi, Armando J B Santos, Luis Felipe Wurdig Bortolon, Anne B Meylan, Peter A Meylan, Jennifer Gray, Robert Hardy, Beth Brost, Michael Bresette, Jonathan C Gorham, Stephen Connett, Barbara Van Sciver Crouchley, Mike Dawson, Deborah Hayes, Carlos E Diez, Robert P van Dam, Sue Willis, Mabel Nava, Kristen M Hart, Michael S Cherkiss, Andrew G Crowder, Clayton Pollock, Zandy Hillis-Starr, Fernando A Muñoz Tenería, Roberto Herrera-Pavón, Vanessa Labrada-Martagón, Armando Lorences, Ana Negrete-Philippe, Margaret M Lamont, Allen M Foley, Rhonda Bailey, Raymond R Carthy, Russell Scarpino, Erin McMichael, Jane A Provancha, Annabelle Brooks, Adriana Jardim, Milagros López-Mendilaharsu, Daniel González-Paredes, Andrés Estrades, Alejandro Fallabrino, Gustavo Martínez-Souza, Gabriela M Vélez-Rubio, Ralf H Boulon, Jaime A Collazo, Robert Wershoven, Vicente Guzmán Hernández, Thomas B Stringell, Amdeep Sanghera, Peter B Richardson, Annette C Broderick, Quinton Phillips, Marta Calosso, John A B Claydon, Tasha L Metz, Amanda L Gordon, Andre M Landry, Donna J Shaver, Janice Blumenthal, Lucy Collyer, Brendan J Godley, Andrew McGowan, Matthew J Witt, Cathi L Campbell, Cynthia J Lagueux, Thomas L Bethel, Lory Kenyon
Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily herbivorous mega-consumers that may migrate over hundreds to thousands of kilometers. Our dataset, the largest ever compiled for sea turtles, has 9690 growth increments from 30 sites from Bermuda to Uruguay from 1973 to 2015...
April 4, 2017: Global Change Biology
Benying Su, Meihua Zhou, Hong Xu, Xiujie Zhang, Yonggeng Li, Hua Su, Bao Xiang
A field experiment was carried out to compare the responses to ozone (O3) in two common herbaceous plant species, Plantago major L. and Sonchus oleraceus L., by building open-top growth chambers in situ to simulate O3 stress (+O3, 85±5ppb, 9hr/day for 30days) in a lowland habitat in Inner Mongolia, Northern China. Responses to O3 of gas exchange, chlorophyll a fluorescence, leaf pigment content, antioxidant capability, soluble protein content, membrane lipid peroxidation and dark respiration (Rd) were analyzed...
March 2017: Journal of Environmental Sciences (China)
Yonggang Lu, Robert John Aitken, Minjie Lin
For the first time, this study has systemically investigated the male reproductive system in a sessile broadcast-spawning marine invertebrate, Galeolaria caespitosa (Polychaeta: Serpulidae), which has significant potential as a bio-indicator species of coastal marine pollution. The abdomen of G. caespitosa was divided by intersegmental septa into over 80 trunk segments. Each segment served as a germinal chamber with a C-shaped gonadal arrangement consisting of several distinct compartments: a seminiferous epithelium (SE) compartment located in the centre of the chamber, with each of its two ends connecting to a nurse cell (NC) compartment and then an efferent duct (ED) compartment...
2017: PloS One
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 bioindicators. Accurate assessment of nematode assemblages requires insight into 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
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...
June 2017: Chemosphere
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...
May 15, 2017: Marine Pollution Bulletin
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...
June 2017: Chemosphere
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