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https://www.readbyqxmd.com/read/27933165/interactions-between-rates-of-temperature-change-and-acclimation-affect-latitudinal-patterns-of-warming-tolerance
#1
Jessica L Allen, Steven L Chown, Charlene Janion-Scheepers, Susana Clusella-Trullas
Critical thermal limits form an increasing component of the estimation of impacts of global change on ectotherms. Whether any consistent patterns exist in the interactive effects of rates of temperature change (or experimental ramping rates) and acclimation on critical thermal limits and warming tolerance (one way of assessing sensitivity to climate change) is, however, far from clear. Here, we examine the interacting effects of ramping rate and acclimation on the critical thermal maxima (CTmax) and minima (CTmin) and warming tolerance of six species of springtails from sub-tropical, temperate and polar regions...
2016: Conservation Physiology
https://www.readbyqxmd.com/read/27932993/effect-of-permissive-dehydration-on-induction-and-decay-of-heat-acclimation-and-temperate-exercise-performance
#2
Rebecca A Neal, Heather C Massey, Michael J Tipton, John S Young, Jo Corbett
Purpose: It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked to PV expansion. We investigated: (i) the influence of dehydration on the time-course of acquisition and decay of HA; (ii) whether dehydration augmented any ergogenic benefits in temperate conditions, particularly those related to PV expansion...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27932219/the-effects-of-long-term-management-on-patterns-of-carbon-storage-in-a-northern-highbush-blueberry-production-system
#3
Denise Nemeth, John G Lambrinos, Bernadine C Strik
Perennial crops potentially provide a sink for atmospheric carbon. However, there is a poor understanding of how perennial crops differ in their carbon allocation patterns, and few studies have tested how agronomic practices such as fertilization influence long-term patterns of carbon allocation in actual production systems. In this study, we report results of a long-term field experiment that tested the individual and combined effects of organic matter incorporation and nitrogen fertilization on carbon allocation...
December 5, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27931745/histone-acetylation-regulates-chromatin-accessibility-role-of-h4k16-in-inter-nucleosome-interaction
#4
Ruihan Zhang, Jochen Erler, Jörg Langowski
The N-terminal tail of histone H4 is an indispensable mediator for inter-nucleosome interaction, which is required for chromatin fiber condensation. H4K16 acetylation (H4K16Ac) activates gene transcription by influencing both chromatin structure and interplay with nonhistone proteins. To understand the influence of H4K16Ac on inter-nucleosome interaction, we performed a simulation study for the H4 tail in the context of two nucleosomes in neighboring unit cells in the crystal structure. The binding conformation of H4 tail with/without K16Ac was sampled by replica exchange with solute tempering, and the free energy landscape was explored by metadynamics...
December 6, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27930674/climate-related-local-extinctions-are-already-widespread-among-plant-and-animal-species
#5
John J Wiens
Current climate change may be a major threat to global biodiversity, but the extent of species loss will depend on the details of how species respond to changing climates. For example, if most species can undergo rapid change in their climatic niches, then extinctions may be limited. Numerous studies have now documented shifts in the geographic ranges of species that were inferred to be related to climate change, especially shifts towards higher mean elevations and latitudes. Many of these studies contain valuable data on extinctions of local populations that have not yet been thoroughly explored...
December 2016: PLoS Biology
https://www.readbyqxmd.com/read/27929709/safety-of-buprenorphine-transdermal-system-in-the-management-of-pain-in-older-adults
#6
Joseph V Pergolizzi, Robert B Raffa, Zachary Marcum, Salvatore Colucci, Steven R Ripa
OBJECTIVES: To evaluate whether buprenorphine transdermal system (BTDS; Butrans®) is an option for the treatment of chronic pain in older adults. METHODS: This retrospective analysis of 16 placebo- and active-controlled and uncontrolled studies (N=6566) evaluated the safety and tolerability profile in patients exposed to BTDS and compared the safety profiles associated with BTDS treatment in older patients ≥ 65 years of age (65 to 98 years) and younger patients < 65 years of age (18 to 64 years)...
December 8, 2016: Postgraduate Medicine
https://www.readbyqxmd.com/read/27928842/evaluating-beneficial-drug-effects-in-a-non-interventional-setting-a-review-of-effectiveness-studies-based-on-swedish-prescribed-drug-register-data
#7
Susanna M Wallerstedt, Mikael Hoffmann
AIMS: To describe and assess current effectiveness studies published up to 2014 using Swedish Prescribed Drug Register (SPDR) data. METHODS: Study characteristics were extracted. Each study was assessed concerning the clinical relevance of the research question, the risk of bias according to a structured checklist, and as to whether its findings contributed to new knowledge. The biases encountered and ways of handling these were retrieved. RESULTS: A total of 24 effectiveness studies were included in the review, the majority on cardiovascular and psychiatric disease (n = 17; 71%)...
December 8, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27925706/influence-of-temperature-and-brewing-time-of-nettle-urtica-dioica-l-infusions-on-vitamin-c-content
#8
Jolanta Wolska, Michał Czop, Karolina Jakubczyk, Katarzyna Janda
Background: Stinging nettle (Urtica dioica L.) can be found in temperate climate zones of Europe, Africa and America Nettle may be a source of nutritional ingredients, mineral salts, vitamins and antioxidants. Objective: The aim of the study was to determine the effect of temperature and brewing time Urtica dioica L. infusions from different parts of this plant on vitamin C (ascorbic acid) content. Material and methods: Infusions of nettle leaf, stem and root were prepared at room temperature, 50°C, 60°C, 70°C and 80°C for 10 minutes...
2016: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/27924430/nutrient-enrichment-effects-on-mycorrhizal-fungi-in-an-andean-tropical-montane-forest
#9
Camille S Delavaux, Tessa Camenzind, Jürgen Homeier, Rosa Jiménez-Paz, Mark Ashton, Simon A Queenborough
Nitrogen (N) and phosphorus (P) deposition are increasing worldwide largely due to increased fertilizer use and fossil fuel combustion. Most work with N and P deposition in natural ecosystems has focused on temperate, highly industrialized, regions. Tropical regions are becoming more developed, releasing large amounts of these nutrients into the atmosphere. Nutrient enrichment in nutrient-poor systems such as tropical montane forest can represent a relatively large shift in nutrient availability, especially for sensitive microorganisms such as arbuscular mycorrhizal fungi (AMF)...
December 6, 2016: Mycorrhiza
https://www.readbyqxmd.com/read/27923580/effects-of-irrigation-and-addition-of-nitrogen-fertiliser-on-net-ecosystem-carbon-balance-for-a-grassland
#10
Gabriel Y K Moinet, Ellen Cieraad, Matthew H Turnbull, David Whitehead
The ability to quantify the impacts of changing management practices on the components of net ecosystem carbon balance (NB) is required to forecast future changes in soil carbon stocks and potential feedbacks on atmospheric CO2 concentrations. In this study we investigated seasonal changes on the components of net ecosystem carbon balance resulting from the application of irrigation and nitrogen fertiliser to a temperate grassland in New Zealand where we simulated grazing events. We made seasonal measurements of the components of NB using chamber measurements in field plots with and without irrigation and addition of nitrogen fertiliser...
December 3, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27923345/combined-transcriptome-and-metabolome-analyses-to-understand-the-dynamic-responses-of-rice-plants-to-attack-by-the-rice-stem-borer-chilo-suppressalis-lepidoptera-crambidae
#11
Qingsong Liu, Xingyun Wang, Vered Tzin, Jörg Romeis, Yufa Peng, Yunhe Li
BACKGROUND: Rice (Oryza sativa L.), which is a staple food for more than half of the world's population, is frequently attacked by herbivorous insects, including the rice stem borer, Chilo suppressalis. C. suppressalis substantially reduces rice yields in temperate regions of Asia, but little is known about how rice plants defend themselves against this herbivore at molecular and biochemical level. RESULTS: In the current study, we combined next-generation RNA sequencing and metabolomics techniques to investigate the changes in gene expression and in metabolic processes in rice plants that had been continuously fed by C...
December 7, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/27922001/anthropogenic-impacts-on-mosquito-populations-in-north-america-over-the-past-century
#12
Ilia Rochlin, Ary Faraji, Dominick V Ninivaggi, Christopher M Barker, A Marm Kilpatrick
The recent emergence and spread of vector-borne viruses including Zika, chikungunya and dengue has raised concerns that climate change may cause mosquito vectors of these diseases to expand into more temperate regions. However, the long-term impact of other anthropogenic factors on mosquito abundance and distributions is less studied. Here, we show that anthropogenic chemical use (DDT; dichlorodiphenyltrichloroethane) and increasing urbanization were the strongest drivers of changes in mosquito populations over the last eight decades in areas on both coasts of North America...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27921329/preventive-dental-visiting-a-critical-interpretive-synthesis-of-theory-explaining-how-inequalities-arise
#13
Rebecca V Harris, Andrew Pennington, Margaret Whitehead
BACKGROUND: In many countries, those with lower socioeconomic status are disproportionately affected by poor oral health. This can be attributed, at least in part, to differences in preventive dental visiting. While several theories have been applied to the area, they generally fail to capture the recursive nature of dental visiting behaviour, and fall short of informing the design of complex interventions to tackle inequalities. OBJECTIVE: To undertake a systematic review and synthesis of theory in order to provide an overview of the pathways which bring about socioeconomic inequalities in early dental visiting, and identify possible intervention points...
December 6, 2016: Community Dentistry and Oral Epidemiology
https://www.readbyqxmd.com/read/27919313/population-dynamics-of-rice-planthoppers-nilaparvata-lugens-and-sogatella-furcifera-hemiptera-delphacidae-in-central-vietnam-and-its-effects-on-their-spring-migration-to-china
#14
G Hu, M-H Lu, H A Tuan, W-C Liu, M-C Xie, C E McInerney, B-P Zhai
Rice planthopper (RPH) populations of Nilaparvata lugens and Sogatella furcifera periodically have erupted across Asia. Predicting RPH population dynamics and identifying their source areas are crucial for the management of these migratory pests in China, but the origins of the migrants to temperate and subtropical regions in China remains unclear. In particular, their early migration to China in March and April have not yet been explored due to a lack of research data available from potential source areas, Central Vietnam and Laos...
December 6, 2016: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/27919241/the-unbuilt-environment-culture-moderates-the-built-environment-for-physical-activity
#15
Andrew J Perrin, Neal Caren, Asheley C Skinner, Adebowale Odulana, Eliana M Perrin
BACKGROUND: While research has demonstrated a link between the built environment and obesity, much variation remains unexplained. Physical features are necessary, but not sufficient, for physical activity: residents must choose to use these features in health-promoting ways. This article reveals a role for local culture in tempering the effect of the physical environment on physical activity behaviors. METHODS: We developed Systematic Cultural Observation (SCO) to observe place-based, health-related culture in Lenoir County, NC (population ~60,000)...
December 5, 2016: BMC Public Health
https://www.readbyqxmd.com/read/27916302/modelling-seasonal-effects-of-temperature-and-precipitation-on-honey-bee-winter-mortality-in-a-temperate-climate
#16
Matthew Switanek, Karl Crailsheim, Heimo Truhetz, Robert Brodschneider
Insect pollinators are essential to global food production. For this reason, it is alarming that honey bee (Apis mellifera) populations across the world have recently seen increased rates of mortality. These changes in colony mortality are often ascribed to one or more factors including parasites, diseases, pesticides, nutrition, habitat dynamics, weather and/or climate. However, the effect of climate on colony mortality has never been demonstrated. Therefore, in this study, we focus on longer-term weather conditions and/or climate's influence on honey bee winter mortality rates across Austria...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27915247/genomic-diversity-of-bacteriophages-infecting-the-fish-pathogen-flavobacterium-psychrophilum
#17
Daniel Castillo, Mathias Middelboe
Bacteriophages infecting the fish pathogen Flavobacterium psychrophilum can potentially be used to prevent and control outbreaks of this bacterium in salmonid aquaculture. However, application of bacteriophages in disease control requires detailed knowledge on their genetic composition. To explore the diversity of F. pyschrophilum bacteriophages we have analyzed the complete genome sequences of 17 phages isolated from two distant geographic areas (Denmark and Chile), including the previously characterized temperate bacteriophage 6H...
December 2, 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27915172/dark-chilling-induces-substantial-structural-changes-and-modifies-galactolipid-and-carotenoid-composition-during-chloroplast-biogenesis-in-cucumber-cucumis-sativus-l-cotyledons
#18
Joanna Skupień, Joanna Wójtowicz, Łucja Kowalewska, Radosław Mazur, Maciej Garstka, Katarzyna Gieczewska, Agnieszka Mostowska
Plants in a temperate climate are often subject to different environmental factors, chilling stress among them, which influence the growth especially during early stages of plant development. Chloroplasts are one of the first organelles affected by the chilling stress. Therefore the proper biogenesis of chloroplasts in early stages of plant growth is crucial for undertaking the photosynthetic activity. In this paper, the analysis of the cotyledon chloroplast biogenesis at different levels of plastid organization was performed in cucumber, one of the most popular chilling sensitive crops...
November 28, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27914544/resistance-monitoring-and-cross-resistance-patterns-of-three-rice-planthoppers-nilaparvata-lugens-sogatella-furcifera-and-laodelphax-striatellus-to-dinotefuran-in-china
#19
Xi-Chao Mu, Wei Zhang, Li-Xiang Wang, Shuai Zhang, Kai Zhang, Cong-Fen Gao, Shun-Fan Wu
Three rice planthoppers, brown planthopper, Nilaparvata lugens, white-backed planthopper, Sogatella furcifera and small brown planthopper, Laodelphax striatellus, are important pests of cultivated rice in tropical and temperate Asia. They have caused severe economic loss and developed resistance to insecticides from most chemical classes. Dinotefuran is the third neonicotinoid which possesses a broad spectrum and systemic insecticidal activity. We determined the susceptibility of dinotefuran to field populations from major rice production areas in China from 2013 to 2015...
November 2016: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/27913150/juvenile-hormone-titers-ovarian-status-and-epicuticular-hydrocarbons-in-gynes-and-workers-of-the-paper-wasp-belonogaster-longitarsus
#20
Hans C Kelstrup, Klaus Hartfelder, Nanike Esterhuizen, Theresa C Wossler
The prevailing paradigm for social wasp endocrinology is that of juvenile hormone (JH) functioning pleiotropically in potential and actual queens, where it fuels dominance behaviors, stimulates ovarian growth and/or affects the production of status-linked cuticular compounds. In colonies with annual cycles (e.g., temperate-zone species), female adults produced at the end of the summer (called gynes) are physiologically primed to hibernate. Despite the absence of egg-laying in the pre-overwintering phase, gynes engage in dominance interactions that may affect reproductive potential following hibernation...
November 29, 2016: Journal of Insect Physiology
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