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https://www.readbyqxmd.com/read/29245177/microplastics-as-an-emerging-threat-to-terrestrial-ecosystems
#1
Anderson Abel de Souza Machado, Werner Kloas, Christiane Zarfl, Stefan Hempel, Matthias C Rillig
Microplastics (plastics < 5 mm, including nanoplastics which are < 0.1 μm) originate from the fragmentation of large plastic litter or from direct environmental emission. Their potential impacts in terrestrial ecosystems remain largely unexplored despite numerous reported effects on marine organisms. Most plastics arriving in the oceans were produced, used, and often disposed on land. Hence, it is within terrestrial systems that microplastics might first interact with biota eliciting ecologically relevant impacts...
December 15, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29220787/assessment-tools-for-microplastics-and-natural-fibres-ingested-by-fish-in-an-urbanised-estuary
#2
Jennifer E Halstead, James A Smith, Elizabeth A Carter, Peter A Lay, Emma L Johnston
Microplastics and fibres occur in high concentrations along urban coastlines, but the occurrence of microplastic ingestion by fishes in these areas requires further investigation. Herein, the ingestion of debris (i.e., synthetic and natural fibres and synthetic fragments of various polymer types) by three benthic-foraging fish species Acanthopagrus australis (yellowfin bream), Mugil cephalus (sea mullet) and Gerres subfasciatus (silverbiddy) in Sydney Harbour, Australia has been quantified and chemically speciated by vibrational spectroscopy to identify the polymer type...
December 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29216487/microplastics-increase-impact-of-treated-wastewater-on-freshwater-microbial-community
#3
Ester M Eckert, Andrea Di Cesare, Marie Therese Kettner, Maria Arias-Andres, Diego Fontaneto, Hans-Peter Grossart, Gianluca Corno
Plastic pollution is a major global concern with several million microplastic particles entering every day freshwater ecosystems via wastewater discharge. Microplastic particles stimulate biofilm formation (plastisphere) throughout the water column and have the potential to affect microbial community structure if they accumulate in pelagic waters, especially enhancing the proliferation of biohazardous bacteria. To test this scenario, we simulated the inflow of treated wastewater into a temperate lake using a continuous culture system with a gradient of concentration of microplastic particles...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29216486/the-effects-of-microplastic-on-freshwater-hydra-attenuata-feeding-morphology-reproduction
#4
Fionn Murphy, Brian Quinn
Microplastic pollution has been a growing concern in the aquatic environment for several years. The abundance of microplastics in the environment has invariably led them to interact with a variety of different aquatic species. The small size of microplastics may make them bioavailable to a great range of species however, the impact this may have is not fully understood. Much of the research on microplastic pollution has focused on the marine environment and species with little research undertaken in freshwater...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29208925/feeding-type-and-development-drive-the-ingestion-of-microplastics-by-freshwater-invertebrates
#5
Christian Scherer, Nicole Brennholt, Georg Reifferscheid, Martin Wagner
Microscopic plastic items (microplastics) are ubiquitously present in aquatic ecosystems. With decreasing size their availability and potential to accumulate throughout food webs increase. However, little is known on the uptake of microplastics by freshwater invertebrates. To address this, we exposed species with different feeding strategies to 1, 10 and 90 µm fluorescent polystyrene spheres (3-3 000 particles mL-1). Additionally, we investigated how developmental stages and a co-exposure to natural particles (e...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29207296/microplastics-in-freshwater-river-sediments-in-shanghai-china-a-case-study-of-risk-assessment-in-mega-cities
#6
Guyu Peng, Pei Xu, Bangshang Zhu, Mengyu Bai, Daoji Li
Microplastics, which are plastic debris with a particle diameter of less than 5 mm, have attracted growing attention in recent years. Its widespread distributions in a variety of habitats have urged scientists to understand deeper regarding their potential impact on the marine living resources. Most studies on microplastics hitherto are focused on the marine environment, and research on risk assessment methodology is still limited. To understand the distribution of microplastics in urban rivers, this study investigated river sediments in Shanghai, the largest urban area in China...
December 2, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29197287/assessing-the-relationship-between-the-abundance-and-properties-of-microplastics-in-water-and-in-mussels
#7
Xiaoyun Qu, Lei Su, Hengxiang Li, Mingzhong Liang, Huahong Shi
Microplastic pollution is increasingly becoming a great environmental concern worldwide. Microplastics have been found in many marine organisms as a result of increasing plastic pollution within marine environments. However, the relationship between micoplastics in organisms and their living environment is still relatively poorly understood. In the present study, we investigated microplastic pollution in the water and the mussels (Mytilus edulis, Perna viridis) at 25 sites along the coastal waters of China...
November 29, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29197232/uptake-tissue-distribution-and-toxicity-of-polystyrene-nanoparticles-in-developing-zebrafish-danio-rerio
#8
Jordan A Pitt, Jordan S Kozal, Nishad Jayasundara, Andrey Massarsky, Rafael Trevisan, Nick Geitner, Mark Wiesner, Edward D Levin, Richard T Di Giulio
Plastic pollution is a critical environmental concern and comprises the majority of anthropogenic debris in the ocean, including macro, micro, and likely nanoscale (less than 100nm in at least one dimension) plastic particles. While the toxicity of macroplastics and microplastics is relatively well studied, the toxicity of nanoplastics is largely uncharacterized. Here, fluorescent polystyrene nanoparticles (PS NPs) were used to investigate the potential toxicity of nanoplastics in developing zebrafish (Danio rerio), as well as to characterize the uptake and distribution of the particles within embryos and larvae...
November 24, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29195176/using-the-asian-clam-as-an-indicator-of-microplastic-pollution-in-freshwater-ecosystems
#9
Lei Su, Huiwen Cai, Prabhu Kolandhasamy, Chenxi Wu, Chelsea M Rochman, Huahong Shi
Bioindicators play an important role in understanding pollution levels, bioavailability and the ecological risks of contaminants. Several bioindicators have been suggested for understanding microplastic in the marine environment. A bioindicator for microplastics in the freshwater environment does not exist. In our previous studies, we found a high frequency of microplastic pollution in the Asian clam (Corbicula fluminea) in Taihu Lake, China. In the present study, we conducted a large-scale survey of microplastic pollution in Asian clams, water and sediment from 21 sites in the Middle-Lower Yangtze River Basin from August to October of 2016...
November 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29191392/cold-atmospheric-plasma-cap-activates-angiogenesis-related-molecules-in-skin-keratinocytes-fibroblasts-and-endothelial-cells-and-improves-wound-angiogenesis-in-an-autocrine-and-paracrine-mode
#10
Stephanie Arndt, Petra Unger, Mark Berneburg, Anja-Katrin Bosserhoff, Sigrid Karrer
BACKGROUND: Cold atmospheric plasma (CAP) emerged as a novel therapeutic field with applications developed for bacterial sterilization, wound healing and cancer treatment. For clinical implementation it is important to know how CAP works and which molecular changes occur after the CAP treatment. Vascularization is an important step during wound healing, however, the effects of CAP on wound angiogenesis are not well examined so far. Furthermore, it has not been investigated, whether CAP primarily affects endothelial cells directly or via paracrine mechanisms to modulate the vasculature...
November 26, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29175683/pet-microplastics-do-not-negatively-affect-the-survival-development-metabolism-and-feeding-activity-of-the-freshwater-invertebrate-gammarus-pulex
#11
Annkatrin Weber, Christian Scherer, Nicole Brennholt, Georg Reifferscheid, Martin Wagner
Over the past decade, microscopic plastic debris, known as microplastics, emerged as a contaminant of concern in marine and freshwater ecosystems. Although regularly detected in aquatic environments, the toxicity of those synthetic particles is not well understood. To address this, we investigated whether the exposure to microplastics adversely affects the amphipod Gammarus pulex, a key freshwater invertebrate. Juvenile (6-9 mm) and adult (12-17 mm) individuals were exposed to irregular, fluorescent polyethylene terephthalate fragments (PET, 10-150 μm; 0...
November 23, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29175125/changes-in-tetracycline-partitioning-and-bacteria-phage-comediated-args-in-microplastic-contaminated-greenhouse-soil-facilitated-by-sophorolipid
#12
Mingming Sun, Mao Ye, Wentao Jiao, Yanfang Feng, Pingfeng Yu, Manqiang Liu, Jiaguo Jiao, Xiaojia He, Kuan Liu, Yuanchao Zhao, Jun Wu, Xin Jiang, Feng Hu
The emerging mixed contamination of antibiotics and microplastics in greenhouse soil has made the control of antibiotic resistant gene (ARG) transmission a novel challenge. In this work, surfactant sophorolipid was applied to enhance the dissipation of tetracycline (TC) and tet genes in the presence of microplastics in greenhouse soil. During 49days of incubation, soil bacteria and phages were both found to be the crucial reservoirs of ARGs. Meanwhile, microplastic's presence significantly inhibited the dissipation of TC and ARGs in the soil...
November 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29172041/airborne-microplastics-consequences-to-human-health
#13
REVIEW
Joana Correia Prata
Microplastics have recently been detected in atmospheric fallout in Greater Paris. Due to their small size, they can be inhaled and may induce lesions in the respiratory system dependent on individual susceptibility and particle properties. Even though airborne microplastics are a new topic, several observational studies have reported the inhalation of plastic fibers and particles, especially in exposed workers, often coursing with dyspnea caused by airway and interstitial inflammatory responses. Even though environmental concentrations are low, susceptible individuals may be at risk of developing similar lesions...
November 21, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29169132/comparative-evaluation-of-sorption-kinetics-and-isotherms-of-pyrene-onto-microplastics
#14
Wenfeng Wang, Jun Wang
Concerns regarding microplastics pollution and their potential to concentrate and transport organic contaminants in aquatic environments are growing in recent years. Sorption of organic chemicals by microplastics may affect the distribution and bioavailability of the chemicals. Here sorption process of pyrene (Pyr), a frequently encountered polycyclic aromatic hydrocarbon in aquatic environments, on three types of mass-produced plastic particles (high-density polyethylene (PE), polystyrene (PS) and polyvinylchloride (PVC)), was investigated by comparative analysis of different sorption kinetic and isotherm models...
November 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154206/a-new-approach-in-separating-microplastics-from-environmental-samples-based-on-their-electrostatic-behavior
#15
Stefanie Felsing, Christian Kochleus, Sebastian Buchinger, Nicole Brennholt, Friederike Stock, Georg Reifferscheid
Numerous studies on microplastics (MPs; Ø < 5 mm) in the aquatic environment have been published, but knowledge about the occurrence and ecological risks of MPs is limited. This is in part because current data on the distribution of MPs are comparable only to a limited extent, due to the many different methods of investigation. In addition, sample preparation is often difficult such that standard procedures are lacking. The aim of this work was to simplify the preparation of different kinds of MP samples...
November 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29148729/stressor-exposures-determine-risk-so-why-do-fellow-scientists-continue-to-focus-on-superficial-microplastics-risk
#16
G Allen Burton
No abstract text is available yet for this article.
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29146203/responses-of-reef-building-corals-to-microplastic-exposure
#17
Jessica Reichert, Johannes Schellenberg, Patrick Schubert, Thomas Wilke
Pollution of marine environments with microplastic particles (i.e. plastic fragments <5 mm) has increased rapidly during the last decades. As these particles are mainly of terrestrial origin, coastal ecosystems such as coral reefs are particularly threatened. Recent studies revealed that microplastic ingestion can have adverse effects on marine invertebrates. However, little is known about its effects on small-polyp stony corals that are the main framework builders in coral reefs. The goal of this study is to characterise how different coral species I) respond to microplastic particles and whether the exposure might II) lead to health effects...
November 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29146202/effects-of-polystyrene-microplastics-on-early-stages-of-two-marine-invertebrates-with-different-feeding-strategies
#18
Silvia Messinetti, Silvia Mercurio, Marco Parolini, Michela Sugni, Roberta Pennati
Nowadays, microplastics represent one of the main threats to marine ecosystems, being able to affect organisms at different stages of their life cycle and at different levels of the food web. Although the presence of plastic debris has been reported in different habitats and the ability to ingest it has been confirmed for different taxa, few studies have been performed to elucidate the effects on survival and development of marine animals. Thus, we explored the effects of different environmental concentrations of polystyrene microbeads on the early stages of two invertebrate species widespread in the Mediterranean shallow waters: the pelagic planktotrophic pluteus larvae of the sea urchin Paracentrotus lividus and the filter-feeding sessile juveniles of the ascidian Ciona robusta...
November 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29145427/do-microplastic-particles-affect-daphnia-magna-at-the-morphological-life-history-and-molecular-level
#19
Hannes K Imhof, Jakub Rusek, Michaela Thiel, Justyna Wolinska, Christian Laforsch
Microplastic particles are ubiquitous not only in marine but also in freshwater ecosystems. However, the impacts of microplastics, consisting of a large variety of synthetic polymers, on freshwater organisms remains poorly understood. We examined the effects of two polymer mixtures on the morphology, life history and on the molecular level of the waterflea Daphnia magna (three different clones). Microplastic particles of ~40 μm were supplied at a low concentration (1% of the food particles) leading to an average of ~30 particles in the digestive tract which reflects a high microplastic contamination but still resembles a natural situation...
2017: PloS One
https://www.readbyqxmd.com/read/29145085/analysis-of-microplastics-in-water-by-micro-raman-spectroscopy-release-of-plastic-particles-from-different-packaging-into-mineral-water
#20
Darena Schymanski, Christophe Goldbeck, Hans-Ulrich Humpf, Peter Fürst
Microplastics are anthropogenic contaminants which have been found in oceans, lakes and rivers. Investigations focusing on drinking water are rare and studies have mainly been using micro-Fourier Transform Infrared Spectroscopy (μ-FT-IR). A major limitation of this technique is its inability to detect particles smaller than 20 μm. However, micro-Raman spectroscopy is capable of detecting even smaller particle sizes. Therefore, we show that this technique, which was used in this study, is particularly useful in detecting microplastics in drinking water where particle sizes are in the low micrometer range...
November 6, 2017: Water Research
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