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https://www.readbyqxmd.com/read/28097426/functional-diversity-increases-ecological-stability-in-a-grazed-grassland
#1
Lauren M Hallett, Claudia Stein, Katharine N Suding
Understanding the factors governing ecological stability in variable environments is a central focus of ecology. Functional diversity can stabilize ecosystem function over time if one group of species compensates for an environmentally driven decline in another. Although intuitively appealing, evidence for this pattern is mixed. We hypothesized that diverse functional responses to rainfall will increase the stability of vegetation cover and biomass across rainfall conditions, but that this effect depends on land-use legacies that maintain functional diversity...
January 17, 2017: Oecologia
https://www.readbyqxmd.com/read/28064314/-gene-pool-of-siberian-tatars-five-ways-of-origin-for-five-subethnic-groups
#2
A T Agdzhoyan, E V Balanovska, A D Padyukova, D O Dolinina, M A Kuznetsova, V V Zaporozhchenko, R A Skhalyakho, S M Koshel, M K Zhabagin, Y M Yusupov, Kh Kh Mustafin, M V Ulyanova, Z A Tychinskih, M B Lavryashina, O P Balanovsky
Siberian Tatars form the largest Turkic-speaking ethnic group in Western Siberia. The group has a complex hierarchical system of ethnographically diverse populations. Five subethnic groups of Tobol-Irtysh Siberian Tatars (N = 388 samples) have been analyzed for 50 informative Y-chromosomal SNPs. The subethnic groups have been found to be extremely genetically diverse (FST = 21%), so the Siberian Tatars form one of the strongly differentiated ethnic gene pools in Siberia and Central Asia. Every method employed in our studies indicates that different subethnic groups formed in different ways...
November 2016: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28051295/long-term-immobilization-of-technetium-via-bioremediation-with-slow-release-substrates
#3
Laura Newsome, Adrian Cleary, Katherine Morris, Jonathan R Lloyd
Radionuclides are present in groundwater at contaminated nuclear facilities with technetium-99 one of the most mobile radionuclides encountered. In situ bioremediation via the generation of microbially-reducing conditions has the potential to remove aqueous and mobile Tc(VII) from groundwater as insoluble Tc(IV). However, questions remain regarding the optimal methods of biostimulation and the stability of reduced Tc(IV) phases under oxic conditions. Here, we selected a range of slow-release electron donor / chemical reduction based substrates available for contaminated land treatment, and assessed their potential to stimulate the formation of recalcitrant Tc(IV) biominerals under conditions relevant to radioactively contaminated land...
January 4, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28049631/post-hurricane-successional-dynamics-in-abundance-and-diversity-of-canopy-arthropods-in-a-tropical-rainforest
#4
T D Schowalter, M R Willig, S J Presley
We quantified long-term successional trajectories of canopy arthropods on six tree species in a tropical rainforest ecosystem in the Luquillo Mountains of Puerto Rico that experienced repeated hurricane-induced disturbances during the 19-yr study (1991-2009). We expected: 1) differential performances of arthropod species to result in taxon- or guild-specific responses; 2) differences in initial conditions to result in distinct successional responses to each hurricane; and 3) the legacy of hurricane-created gaps to persist despite subsequent disturbances...
January 3, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28038873/current-use-pesticide-and-legacy-organochlorine-pesticide-dynamics-at-the-ocean-sea-ice-atmosphere-interface-in-resolute-passage-canadian-arctic-during-winter-summer-transition
#5
Monika Pućko, Gary A Stern, Alexis E Burt, Liisa M Jantunen, Terry F Bidleman, Robie W Macdonald, David G Barber, Nicolas-X Geilfus, Søren Rysgaard
Here, we present the first detailed analysis of processes by which various current use pesticides (CUPs) and legacy organochlorine pesticides (OCPs) are concentrated in melt ponds that form on Arctic sea ice in the summer, when surface snow is melting and ice eventually breaks up. Four current use pesticides (dacthal, chlorpyrifos, trifluralin, and pentachloronitrobenzene) and one legacy organochlorine pesticide (α-hexachlorocyclohexane) were detected in ponds in Resolute Passage, Canadian Arctic, in 2012...
December 27, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28038350/norm-contaminated-area-identification-using-radionuclides-activity-concentration-pattern-in-a-soil-profile
#6
Bogusław Michalik
According to the requirements set by European BSS the exposure of humans and biota to ionizing radiation originating from natural radionuclides but under anthropogenically changed conditions should be managed within the same regulatory framework as other practices. Such situation creates the strong needs to have a reliable method to distinguish whether the particular case of natural radioactivity occurrence has resulted from human activity or it is pure natural phenomenon. In case of current activity of particular NORM industry there are no doubts however, in case of a legacy site, such question becomes crucial...
December 27, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28035843/within-the-triangle-of-healthcare-legacies-comparing-the-performance-of-south-eastern-european-health-systems
#7
Mihajlo Michael Jakovljevic, Jelena Arsenijevic, Milena Pavlova, Nick Verhaeghe, Ulrich Laaser, Wim Groot
OBJECTIVE: Inter-regional comparison of health-reform outcomes in south-eastern Europe (SEE). METHODS: Macro-indicators were obtained from the WHO Health for All Database. Inter-regional comparison among post-Semashko, former Yugoslavia and prior-1989-free-market SEE economies was conducted. RESULTS: United Nations Development Program Human Development Index growth was strongest among prior-free-market SEE followed by former Yugoslavia and post-Semashko...
December 30, 2016: Journal of Medical Economics
https://www.readbyqxmd.com/read/28034506/development-and-comparison-of-gas-chromatography-mass-spectrometry-techniques-for-analysis-of-flame-retardants
#8
Jakob Gustavsson, Lutz Ahrens, Minh A Nguyen, Sarah Josefsson, Karin Wiberg
The restrictions on the use of legacy flame retardants (FRs) have increased the need of alternative FRs to comply with fire safety legislations. In this study, the feasibility of three different gas chromatography-mass spectrometry (GC-MS) techniques were investigated for the analysis of 102 legacy and alternative FRs including polybrominated diphenyl ethers (PBDEs, n=27), halogenated FRs (HFRs, containing bromine and/or chlorine, n=46), and organophosphorous FRs (OPFRs, n=29). The tested techniques included GC-single MS with (i) electon impact (EI) ionization and (ii) negative chemical ionization (NCI), and (iii) GC-tandem MS (MS/MS) with EI ionization...
December 13, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28032302/the-1925-diphtheria-antitoxin-run-to-nome-alaska-a-public-health-illustration-of-human-animal-collaboration
#9
Basil H Aboul-Enein, William C Puddy, Jacquelyn E Bowser
Diphtheria is an acute toxin-mediated superficial infection of the respiratory tract or skin caused by the aerobic gram-positive bacillus Corynebacterium diphtheriae. The epidemiology of infection and clinical manifestations of the disease vary in different parts of the world. Historical accounts of diphtheria epidemics have been described in many parts of the world since antiquity. Developed in the late 19th century, the diphtheria antitoxin (DAT) played a pivotal role in the history of public health and vaccinology prior to the advent of the diphtheria-tetanus toxoids and acellular pertussis (DTaP) vaccine...
December 29, 2016: Journal of Medical Humanities
https://www.readbyqxmd.com/read/28032040/the-olympic-legacy-journal-metrics-in-sports-medicine-and-dentistry
#10
REVIEW
Joel Thomas, Tom W M Walker, Stuart Miller, Alistair Cobb, Steven J Thomas
Systematic analysis of integral aspects within sport enables improvement in performance. One key aspect is the management and prevention of injuries. Bibliometrics is a systematic method for evaluating research output. It may be expected that the quantity and quality of sports injury research over time may strongly correlate with the timing of the Olympic games. This study was conducted to determine the effect of the Olympic legacy on academic sports medicine and evidence to prevent injuries of the face and teeth...
November 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28028456/seqenv-linking-sequences-to-environments-through-text-mining
#11
Lucas Sinclair, Umer Z Ijaz, Lars Juhl Jensen, Marco J L Coolen, Cecile Gubry-Rangin, Alica Chroňáková, Anastasis Oulas, Christina Pavloudi, Julia Schnetzer, Aaron Weimann, Ali Ijaz, Alexander Eiler, Christopher Quince, Evangelos Pafilis
Understanding the distribution of taxa and associated traits across different environments is one of the central questions in microbial ecology. High-throughput sequencing (HTS) studies are presently generating huge volumes of data to address this biogeographical topic. However, these studies are often focused on specific environment types or processes leading to the production of individual, unconnected datasets. The large amounts of legacy sequence data with associated metadata that exist can be harnessed to better place the genetic information found in these surveys into a wider environmental context...
2016: PeerJ
https://www.readbyqxmd.com/read/28028062/cardiovascular-effects-of-performance-enhancing-drugs
#12
André La Gerche, Maria J Brosnan
Exercise and competitive sports should be associated with a wide range of health benefits with the potential to inspire a positive community health legacy. However, the reputation of sports is being threatened by an ever-expanding armamentarium of agents with real or perceived benefits in performance enhancement. In addition to the injustice of unfair advantage for dishonest athletes, significant potential health risks are associated with performance-enhancing drugs. Performance-enhancing drugs may have an effect on the cardiovascular system by means of directly altering the myocardium, vasculature, and metabolism...
January 3, 2017: Circulation
https://www.readbyqxmd.com/read/28027524/challenges-with-secondary-use-of-multi-source-water-quality-data-in-the-united-states
#13
Lori A Sprague, Gretchen P Oelsner, Denise M Argue
Combining water-quality data from multiple sources can help counterbalance diminishing resources for stream monitoring in the United States and lead to important regional and national insights that would not otherwise be possible. Individual monitoring organizations understand their own data very well, but issues can arise when their data are combined with data from other organizations that have used different methods for reporting the same common metadata elements. Such use of multi-source data is termed "secondary use"-the use of data beyond the original intent determined by the organization that collected the data...
December 22, 2016: Water Research
https://www.readbyqxmd.com/read/27992849/motor-neuron-disease-mortality-and-lifetime-petrol-lead-exposure-evidence-from-national-age-specific-and-state-level-age-standardized-death-rates-in-australia
#14
Sammy Zahran, Mark A S Laidlaw, Dominic B Rowe, Andrew S Ball, Howard W Mielke
BACKGROUND: The age standardized death rate from motor neuron disease (MND) for persons 40-84 years of age in the Australian States of New South Wales, Victoria, and Queensland increased dramatically from 1958 to 2013. Nationally, age-specific MND death rates also increased over this time period, but the rate of the rise varied considerably by age-group. The historic use of lead (Pb) additives in Australian petrol is a candidate explanation for these trends in MND mortality (International Classification of Disease (ICD)-10 G12...
December 18, 2016: Environmental Research
https://www.readbyqxmd.com/read/27984662/long-term-structural-and-biomass-dynamics-of-virgin-tsuga-canadensis-pinus-strobus-forests-after-hurricane-disturbance
#15
Anthony W D'Amato, David A Orwig, David R Foster, Audrey Barker Plotkin, Peter K Schoonmaker, Maggie R Wagner
The development of old-growth forests in northeastern North America has largely been within the context of gap-scale disturbances given the rarity of stand-replacing disturbances. Using the 10-ha old-growth Harvard Tract and its associated 90-year history of measurements, including detailed surveys in 1989 and 2009, we document the long-term structural and biomass development of an old-growth Tsuga canadensis-Pinus strobus forest in southern New Hampshire, USA following a stand-replacing hurricane in 1938. Measurements of aboveground biomass pools were integrated with data from second- and old-growth T...
December 16, 2016: Ecology
https://www.readbyqxmd.com/read/27968830/availability-and-use-of-primary-care-facilities-in-china-a-nationwide-representative-survey
#16
William C W Wong, Sunfang Jiang, Jason Ong, Minghui Peng, Eric Wan, Zhanshu Zhu, Cindy L K Lam, Michael Kidd, Martin Roland
BACKGROUND: China introduced a national policy to develop primary care in 2009, with 8669 community health centres (CHCs) established by 2014, employing more than 300 000 staff. However, against a background of the "barefoot doctor" legacy in rural China, mistrust of doctors, and over-reliance on specialist care, these facilities have been underused. This study aimed to evaluate the current quality of CHCs in China, including the organisation and infrastructure, as well as the use and training of the health-care professionals within primary care...
October 2016: Lancet
https://www.readbyqxmd.com/read/27927735/-just-let-me-go-end-of-life-planning-among-ojibwe-elders
#17
Mary Kate Dennis, Karla T Washington
PURPOSE OF THE STUDY: Although advance care planning (ACP) is designed to promote person-centered end-of-life care, the principles underpinning it are at odds with the values and norms of many American Indian/Alaska Native (AI/AN) communities, contributing to low rates of ACP among AI/AN elders. The purpose of this study was to explore the apparent tension between Western approaches to end-of-life care, including its emphasis on ACP, and the expectations and wishes of one community of AI elders, in hopes of informing more culturally appropriate approaches to planning for end-of-life care...
December 7, 2016: Gerontologist
https://www.readbyqxmd.com/read/27907264/the-legacy-of-large-regime-shifts-in-shallow-lakes
#18
Joy M Ramstack Hobbs, William O Hobbs, Mark B Edlund, Kyle D Zimmer, Kevin M Theissen, Natalie Hoidal, Leah M Domine, Mark A Hanson, Brian R Herwig, James B Cotner
Ecological shifts in shallow lakes from clear-water macrophyte-dominated to turbid-water phytoplankton-dominated are generally thought of as rapid short-term transitions. Diatom remains in sediment records from shallow lakes in the Prairie Pothole Region of North America provide new evidence that the long-term ecological stability of these lakes is defined by the legacy of large regime shifts. We examine the modern and historical stability of 11 shallow lakes. Currently, four of the lakes are in a clear-water state, three are consistently turbid-water, and four have been observed to change state from year to year (transitional)...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27898309/diverging-temporal-trends-of-human-exposure-to-bisphenols-and-plastizisers-such-as-phthalates-caused-by-substitution-of-legacy-edcs
#19
Irina Gyllenhammar, Anders Glynn, Bo A G Jönsson, Christian H Lindh, Per Ola Darnerud, Kettil Svensson, Sanna Lignell
Phthalates and phenolic substances were investigated in urine samples from first-time mothers in Uppsala, Sweden, collected between 2009 and 2014. These substances have a comparably fast metabolism and urinary metabolites are predominantly analysed. The main aim was to investigate if measures to decrease production and use of certain phthalates and bisphenol A (BPA) have resulted in decreased human exposure, and to determine if exposures to replacement chemicals have increased. Temporal trends were evaluated for metabolites (n=13) of seven phthalates, a phthalate replacer, four different bisphenols, triclosan, one organophosphate-based flame retardant, and for two pesticides...
November 26, 2016: Environmental Research
https://www.readbyqxmd.com/read/27884867/narrative-medicine-and-death-in-the-icu-word-clouds-as-a-visual-legacy
#20
Meredith Vanstone, Feli Toledo, France Clarke, Anne Boyle, Mita Giacomini, Marilyn Swinton, Lois Saunders, Melissa Shears, Nicole Zytaruk, Anne Woods, Trudy Rose, Tracey Hand-Breckenridge, Diane Heels-Ansdell, Shelley Anderson-White, Robert Sheppard, Deborah Cook
OBJECTIVE: The Word Cloud is a frequent wish in the 3 Wishes Project developed to nurture peace and ease the grieving process for dying critically ill patients. The objective was to examine whether Word Clouds can act as a heuristic approach to encourage a narrative orientation to medicine. Narrative medicine is an approach which can strengthen relationships, compassion and resilience. DESIGN: Word Clouds were created for 42 dying patients, and we interviewed 37 family members and 73 clinicians about their impact...
November 24, 2016: BMJ Supportive & Palliative Care
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