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https://www.readbyqxmd.com/read/29143883/rooting-depth-varies-differentially-in-trees-and-grasses-as-a-function-of-mean-annual-rainfall-in-an-african-savanna
#1
Ricardo M Holdo, Jesse B Nippert, Michelle C Mack
A significant fraction of the terrestrial biosphere comprises biomes containing tree-grass mixtures. Forecasting vegetation dynamics in these environments requires a thorough understanding of how trees and grasses use and compete for key belowground resources. There is disagreement about the extent to which tree-grass vertical root separation occurs in these ecosystems, how this overlap varies across large-scale environmental gradients, and what these rooting differences imply for water resource availability and tree-grass competition and coexistence...
November 16, 2017: Oecologia
https://www.readbyqxmd.com/read/29136189/serum-omega-3-fatty-acids-and-treatment-outcomes-among-women-undergoing-assisted-reproduction
#2
Y-H Chiu, A E Karmon, A J Gaskins, M Arvizu, P L Williams, I Souter, B R Rueda, R Hause, J E Chavarro
STUDY QUESTION: Are serum polyunsaturated fatty acids (PUFA) concentrations, including omega-3 (ω3-PUFA) and omega-6 (ω6-PUFA), related to ART outcomes? SUMMARY ANSWER: Serum levels of long-chain ω3-PUFA were positively associated with probability of live birth among women undergoing ART. WHAT IS KNOWN ALREADY: Intake of ω3-PUFA improves oocyte and embryo quality in animal and human studies. However, a recent cohort study found no relation between circulating ω3-PUFA levels and pregnancy rates after ART...
November 10, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29132720/intensify-production-transform-biomass-to-energy-and-novel-goods-and-protect-soils-in-europe-a-vision-how-to-mobilize-marginal-lands
#3
REVIEW
P Schröder, B Beckers, S Daniels, F Gnädinger, E Maestri, N Marmiroli, M Mench, R Millan, M M Obermeier, N Oustriere, T Persson, C Poschenrieder, F Rineau, B Rutkowska, T Schmid, W Szulc, N Witters, A Sæbø
The rapid increase of the world population constantly demands more food production from agricultural soils. This causes conflicts, since at the same time strong interest arises on novel bio-based products from agriculture, and new perspectives for rural landscapes with their valuable ecosystem services. Agriculture is in transition to fulfill these demands. In many countries, conventional farming, influenced by post-war food requirements, has largely been transformed into integrated and sustainable farming...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127479/tall-young-females-get-ahead-size-specific-fecundity-in-wild-kangaroos-suggests-a-steep-trade-off-with-growth
#4
Louise Quesnel, Wendy J King, Graeme Coulson, Marco Festa-Bianchet
When resources are limited, organisms face allocation conflicts. Indeterminate growth creates a persistent conflict with reproduction, as growth may enhance future reproduction, but diverts resources from current reproduction. Little is known about allocation trade-offs in mammals with indeterminate growth. We studied growth and reproduction in adult female eastern grey kangaroos (Macropus giganteus), an iteroparous mammal with indeterminate growth. Allocation trajectories varied with age and size: for 4-year-old females, fecundity increased from 30 to 82% from shortest to average-sized individuals...
November 10, 2017: Oecologia
https://www.readbyqxmd.com/read/29125934/bringing-urban-governance-back-in-neighborhood-conflicts-and-depression
#5
Qiang Fu
Urban governance and its impact on contentious politics have received remarkably little attention in existing studies on mental health. Drawing on a measure of neighborhood conflicts developed in a survey of thirty-nine urban neighborhoods in Guangzhou, China, this article investigates the potential link between urban governance and mental health. Net of sociodemographic, relational, and environmental measures, it finds that among residents' conflicts with different entities of urban governance, only those with local/grassroots governments are significantly associated with more depressive symptoms...
November 7, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/29124976/rethinking-mercury-the-role-of-selenium-in-the-pathophysiology-of-mercury-toxicity
#6
Henry A Spiller
INTRODUCTION: There is increasing evidence that the pathophysiological target of mercury is in fact selenium, rather than the covalent binding of mercury to sulfur in the body's ubiquitous sulfhydryl groups. The role of selenium in mercury poisoning is multifaceted, bidirectional, and central to understanding the target organ toxicity of mercury. METHODS: An initial search was performed using Medline/PubMed, Toxline, Google Scholar, and Google for published work on mercury and selenium...
November 10, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/29118405/extreme-behavioural-shifts-by-baboons-exploiting-risky-resource-rich-human-modified-environments
#7
Gaelle Fehlmann, M Justin O'Riain, Catherine Kerr-Smith, Stephen Hailes, Adrian Luckman, Emily L C Shepard, Andrew J King
A range of species exploit anthropogenic food resources in behaviour known as 'raiding'. Such behavioural flexibility is considered a central component of a species' ability to cope with human-induced environmental changes. Here, we study the behavioural processes by which raiding male chacma baboons (Papio ursinus) exploit the opportunities and mitigate the risks presented by raiding in the suburbs of Cape Town, South Africa. Ecological sampling and interviews conducted with 'rangers' (employed to manage the baboons' space use) revealed that baboons are at risk of being herded out of urban spaces that contain high-energy anthropogenic food sources...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29117922/depression-anxiety-and-post-traumatic-stress-disorder-among-youth-in-low-and-middle-income-countries-a-review-of-prevalence-and-treatment-interventions
#8
REVIEW
Swetha Yatham, Shalini Sivathasan, Rosalia Yoon, Tricia L da Silva, Arun V Ravindran
BACKGROUND: Low and middle income countries (LMICs) not only have the majority of the world's population but also the largest proportion of youth. Poverty, civil conflict and environmental stressors tend to be endemic in these countries and contribute to significant psychiatric morbidity, including depression, anxiety and post-traumatic stress disorder (PTSD). However, mental health data from LMICs is scarce, particularly data on youth. Evaluation of such information is crucial for planning services and reducing the burden of disability...
October 31, 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29112712/the-protective-role-of-melatonin-in-porcine-oocyte-meiotic-failure-caused-by-the-exposure-to-benzo-a-pyrene
#9
Yilong Miao, Changyin Zhou, Qingyun Bai, Zhaokang Cui, Xiayan ShiYang, Yajuan Lu, Mianqun Zhang, Xiaoxin Dai, Bo Xiong
STUDY QUESTION: Does melatonin restore the benzo(a)pyrene (BaP)-induced meiotic failure in porcine oocytes? SUMMARY ANSWER: Melatonin effectively inhibits the increased reactive oxygen species (ROS) level and apoptotic rate in BaP-exposed porcine oocytes to recover the meiotic failure. WHAT IS KNOWN ALREADY: BaP, a widespread environmental carcinogen found in particulate matter, 2.5 µm or less (PM2.5), has been shown to have toxicity at the level of the reproductive systems...
November 3, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29108651/targeting-couple-and-parent-child-coercion-to-improve-health-behaviors
#10
Amy M Smith Slep, Richard E Heyman, Danielle M Mitnick, Michael F Lorber, Theodore P Beauchaine
This phase of the NIH Science of Behavior Change program emphasizes an "experimental medicine approach to behavior change," that seeks to identify targets related to stress reactivity, self-regulation, and social processes for maximal effects on multiple health outcomes. Within this framework, our project focuses on interpersonal processes associated with health: coercive couple and parent-child conflict. Diabetes and poor oral health portend pain, distress, expense, loss of productivity, and even mortality...
October 19, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/29099320/perceptions-of-the-veterinary-profession-among-human-health-care-students-before-an-inter-professional-education-course-at-midwestern-university
#11
Ryane E Englar, Alyssa Show-Ridgway, Donald L Noah, Erin Appelt, Ross Kosinski
Conflicts among health care professionals often stem from misperceptions about each profession's role in the health care industry. These divisive tendencies impede progress in multidisciplinary collaborations to improve human, animal, and environmental health. Inter-professional education (IPE) may repair rifts between health care professions by encouraging students to share their professional identities with colleagues in unrelated health care disciplines. An online survey was conducted at Midwestern University (MWU) to identify baseline perceptions about veterinary medicine among entry-level human health care students before their enrollment in an inter-professional course...
November 3, 2017: Journal of Veterinary Medical Education
https://www.readbyqxmd.com/read/29082207/a-strengths-weaknesses-opportunities-threats-swot-analysis-on-the-clinical-utility-of-sperm-dna-fragmentation-testing-in-specific-male-infertility-scenarios
#12
Sandro C Esteves, Ashok Agarwal, Chak-Lam Cho, Ahmad Majzoub
BACKGROUND: Sperm DNA fragmentation (SDF) is recognized as a leading cause of male infertility because it can impair the paternal genome through distinct pathophysiological mechanisms. Current evidence supports SDF as a major factor in the pathophysiology of several conditions, including varicocele, unexplained infertility, assisted reproductive technology failure, and environmental lifestyle factors, although the mechanisms involved have not been fully described yet. Measurement of the levels of DNA fragmentation in semen provides valuable information on the integrity of paternal chromatin and may guide therapeutic strategies...
September 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/29080270/warming-induced-upward-migration-of-the-alpine-treeline-in-the-changbai-mountains-northeast-china
#13
Haibo Du, Jie Liu, Mai-He Li, Ulf Büntgen, Yue Yang, Lei Wang, Zhengfang Wu, Hong S He
Treeline responses to environmental changes describe an important phenomenon in global change research. Often conflicting results and generally too short observations are, however, still challenging our understanding of climate-induced treeline dynamics. Here, we use a state-of-the-art dendroecological approach to reconstruct long-term changes in the position of the alpine treeline in relation to air temperature at two sides in the Changbai Mountains in northeast China. Over the past 160 years, the treeline increased by around 80 m, a process that can be divided into three phases of different rates and drives...
October 28, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29079094/a-regional-strategy-for-ecological-sustainability-a-case-study-in-southwest-china
#14
Xue Wu, Shiliang Liu, Fangyan Cheng, Xiaoyun Hou, Yueqiu Zhang, Shikui Dong, Guohua Liu
Partitioning, a method considering environmental protection and development potential, is an effective way to provide regional management strategies to maintain ecological sustainability. In this study, we provide a large-scale regional division approach and present a strategy for Southwest China, which also has extremely high development potential because of the "Western development" policy. Based on the superposition of 15 factors, including species diversity, pattern restriction, agricultural potential, accessibility, urbanization potential, and topographical limitations, the environmental value and development benefit in the region were quantified spatially by weighting the sum of indicators within environmental and development categories...
October 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29077936/urinary-concentrations-of-3-diethylcarbamoyl-benzoic-acid-dcba-a-major-metabolite-of-n-n-diethyl-m-toluamide-deet-and-semen-parameters-among-men-attending-a-fertility-center
#15
Thalia R Segal, Lidia Mínguez-Alarcón, Yu-Han Chiu, Paige L Williams, Feiby L Nassan, Ramace Dadd, María Ospina, Antonia M Calafat, Russ Hauser
STUDY QUESTION: Are specific gravity (SG)-adjusted urinary concentrations of 3-(diethylcarbamoyl)benzoic acid (DCBA) associated with semen parameters among men attending an academic fertility center? SUMMARY ANSWER: Our study did not demonstrate any association between SG-adjusted urinary DCBA concentrations and semen parameters among men attending an academic fertility center. WHAT IS KNOWN ALREADY: N,N-Diethyl-m-toluamide (DEET) is the most common active ingredient in consumer insect repellents...
October 25, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29065299/economic-socio-political-and-environmental-risks-of-road-development-in-the-tropics
#16
REVIEW
Mohammed Alamgir, Mason J Campbell, Sean Sloan, Miriam Goosem, Gopalasamy Reuben Clements, Mahmoud I Mahmoud, William F Laurance
It is projected that 25 million km of new paved roads will be developed globally by 2050 - enough to encircle the planet more than 600 times. Roughly 90% of new roads will be built in developing nations, frequently in tropical and subtropical regions with high biodiversity and environmental values. Many developing nations are borrowing from international lenders or negotiating access to their natural resources in order to expand their transportation infrastructure. Given the unprecedented pace and extent of these initiatives, it is vital to thoroughly assess the potential consequences of large-scale road and highway projects...
October 23, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29063394/multivariate-curve-resolution-of-organic-pollution-patterns-in-mangrove-forest-sediment-from-qeshm-island-and-khamir-port-persian-gulf-iran
#17
Mahsa Dadashi, Sanaz Ghaffari, Alireza Riyahi Bakhtiari, Roma Tauler
Straight-chain alkanes (n-alkanes) have been proposed as biomarkers to assess petroleum pollution sources in marine environments. In this work, three sampling sites were selected along Iranian-protected mangrove forests in the Persian Gulf. Sample sites were chosen to represent different compositions and sources of n-alkanes in surface sediments (0-5 cm) from different locations in the Khamir Port, in the middle part of the Gulf, and in the Qeshm Island. Samples were analyzed by gas chromatography-mass spectrometry (GC-MS), and the obtained n-alkanes concentrations were analyzed by principal component analysis (PCA) and multivariate curve resolution alternating least squares (MCR-ALS) to deduce their possible sources and distribution patterns...
October 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29056379/multi-layered-water-resources-management-and-uses-under-the-impacts-of-global-changes-in-a-southern-coastal-metropolis-when-will-it-be-already-too-late-crossed-analysis-in-recife-ne-brazil
#18
Emmanuelle Petelet-Giraud, Lise Cary, Paul Cary, Guillaume Bertrand, Armelle Giglio-Jacquemot, Ricardo Hirata, Luc Aquilina, Lincoln Muniz Alves, Veridiana Martins, Ana Maria Melo, Suzana Montenegro, Eliot Chatton, Melissa Franzen, Axel Aurouet
Coastal water resources are a worldwide key socio-environmental issue considering the increasing concentration of population in these areas. Here, we propose an integrative transdisciplinary approach of water resource, water management and water access in Recife (NE Brazil). The present-day water situation is conceptualized as an imbricated multi-layered system: a multi-layered water resource, managed by a multi-layered governance system and used by a multi-layered social population. This allows identifying processes of quantitative, qualitative, and sanitary conflicts between governance and population strategies regarding water supply, as well as the institutional and individual denials of these conflicts...
October 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29049962/evaluation-of-methods-for-managing-censored-results-when-calculating-the-geometric-mean
#19
Hannah G Mikkonen, Bradley O Clarke, Raghava Dasika, Christian J Wallis, Suzie M Reichman
Currently, there are conflicting views on the best statistical methods for managing censored environmental data. The method commonly applied by environmental science researchers and professionals is to substitute half the limit of reporting for derivation of summary statistics. This approach has been criticised by some researchers, raising questions around the interpretation of historical scientific data. This study evaluated four complete soil datasets, at three levels of simulated censorship, to test the accuracy of a range of censored data management methods for calculation of the geometric mean...
October 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29049177/association-of-bmp-14-rs143383-ploymorphism-with-its-susceptibility-to-osteoarthritis-a-meta-analysis-and-systematic-review-according-to-prisma-guideline
#20
REVIEW
Yi Yin, Yan Wang
BACKGROUND: Osteoarthritis (OA) is a complex disease which can be caused by both environmental and genetic factors. A functional locus rs143383 of bone morphogenetic protein-14 (BMP-14) has been pointed out to be associated with OA etiology, but conflicting conclusions have been reached. To provide a more comprehensive conclusion about this issue, we performed this meta-analysis. METHODS: Relevant studies were searched from electronic databases including PubMed, Chinese National Knowledge Infrastructure, Embase, and Wanfang...
October 2017: Medicine (Baltimore)
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