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Kodera T, Ohsaki H, Yamawo A. Aphids increase their rate of survival on emergent aquatic plants through niche construction. J Evol Biol 2024; 37:283-289. [PMID: 38340333 DOI: 10.1093/jeb/voae011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/25/2023] [Accepted: 01/15/2024] [Indexed: 02/12/2024]
Abstract
Flooding or rain is a threat to many insects in nature, including herbivorous invertebrates whose hosts are emergent aquatic plants. They may thus have developed particular adaptations to withstand the flooding that is a feature of emergent plants' environment. The aphid Hyalopterus pruni (Hemiptera: Aphididae) modifies the physical and chemical conditions of its habitat by periodically spreading wax around itself with its hind legs. This behaviour constitutes a form of niche construction. We hypothesized that the aphid decreases its risk of death of own or around other individuals when submerged in water by spreading wax powder secreted from its body onto the leaves of its host plant, Phragmites australis. We compared the hydrophobicity of waxed and normal leaf surfaces. Next, we compared the survival rates of wax-powdering and nonwax-powdering aphids under submerged and rainy conditions in the laboratory and in the field. Finally, we examined whether the aphids' wax-powdering behaviour increased as a result of experiencing brief submergence or rain. The surface of the waxed area was significantly more water-repellent than the surface of unwaxed leaves. The waxed areas held air bubbles when under water. In experiments, aphids without wax around themselves exhibited lower survival rates: 22.9% in laboratory conditions and 15.7% in field conditions after 48 hr underwater. In contrast, aphids that secreted wax had higher survival rates, with 41.5% and 38.2% under laboratory and field conditions, respectively, after the same duration. Aphids exposed to rainfall showed similar results. Moreover, aphids that had experienced rain or submersion for 24 hr engaged in increased wax-powdering behaviour. These results indicate that aphids reduce their risk of drowning by powdering secreted wax onto the surface of leaves around them. Our findings suggest that niche construction by herbivorous invertebrates supports their ability to utilize host plants that grow under stressful conditions, such as emergent plants that are subject to periodic inundation.
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Affiliation(s)
- Taisei Kodera
- Department of Biological Sciences, Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan
| | - Haruna Ohsaki
- Department of Biological Sciences, Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Akira Yamawo
- Department of Biological Sciences, Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan
- Center for Ecological Research, Kyoto University, Otsu, Japan
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Abstract
The author presents poetry that expands understanding of the humanuniverse experience at a lake.
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Koch M, Matzke I, Huhn S, Sié A, Boudo V, Compaoré G, Maggioni MA, Bunker A, Bärnighausen T, Dambach P, Barteit S. Assessing the Effect of Extreme Weather on Population Health Using Consumer-Grade Wearables in Rural Burkina Faso: Observational Panel Study. JMIR Mhealth Uhealth 2023; 11:e46980. [PMID: 37938879 PMCID: PMC10666008 DOI: 10.2196/46980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 08/25/2023] [Accepted: 09/15/2023] [Indexed: 11/10/2023] Open
Abstract
BACKGROUND Extreme weather, including heat and extreme rainfall, is projected to increase owing to climate change, which can have adverse impacts on human health. In particular, rural populations in sub-Saharan Africa are at risk because of a high burden of climate-sensitive diseases and low adaptive capacities. However, there is a lack of data on the regions that are anticipated to be most exposed to climate change. Improved public health surveillance is essential for better decision-making and health prioritization and to identify risk groups and suitable adaptation measures. Digital technologies such as consumer-grade wearable devices (wearables) may generate objective measurements to guide data-driven decision-making. OBJECTIVE The main objective of this observational study was to examine the impact of weather exposure on population health in rural Burkina Faso using wearables. Specifically, this study aimed to assess the relationship between individual daily activity (steps), sleep duration, and heart rate (HR), as estimated by wearables, and exposure to heat and heavy rainfall. METHODS Overall, 143 participants from the Nouna health and demographic surveillance system in Burkina Faso wore the Withings Pulse HR wearable 24/7 for 11 months. We collected continuous weather data using 5 weather stations throughout the study region. The heat index and wet-bulb globe temperature (WBGT) were calculated as measures of heat. We used linear mixed-effects models to quantify the relationship between exposure to heat and rainfall and the wearable parameters. Participants kept activity journals and completed a questionnaire on their perception of and adaptation to heat and other weather exposure. RESULTS Sleep duration decreased significantly (P<.001) with higher heat exposure, with approximately 15 minutes shorter sleep duration during heat stress nights with a heat index value of ≥25 °C. Many participants (55/137, 40.1%) reported that heat affected them the most at night. During the day, most participants (133/137, 97.1%) engaged in outdoor physical work such as farming, housework, or fetching water. During the rainy season, when WBGT was highest, daily activity was highest and increased when the daily maximum WBGT surpassed 30 °C during the rainiest month. In the hottest month, daily activity decreased per degree increase in WBGT for values >30 °C. Nighttime HR showed no significant correlation with heat exposure. Daytime HR data were insufficient for analysis. We found no negative health impact associated with heavy rainfall. With increasing rainfall, sleep duration increased, average nightly HR decreased, and activity decreased. CONCLUSIONS During the study period, participants were frequently exposed to heat and heavy rainfall. Heat was particularly associated with impaired sleep and daily activity. Essential tasks such as harvesting, fetching water, and caring for livestock expose this population to weather that likely has an adverse impact on their health. Further research is essential to guide interventions safeguarding vulnerable communities.
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Affiliation(s)
- Mara Koch
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
| | - Ina Matzke
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
| | - Sophie Huhn
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
| | - Ali Sié
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
- Centre de Recherche en Santé, Nouna, Burkina Faso
| | | | | | - Martina Anna Maggioni
- Charité - Universitätsmedizin Berlin, Institute of Physiology, Center for Space Medicine and Extreme Environments Berlin, Berlin, Germany
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | - Aditi Bunker
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
- Center for Climate, Health, and the Global Environment, Harvard T.H. Chan School of Public Health, Boston, MA, United States
| | - Till Bärnighausen
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, United States
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | - Peter Dambach
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
| | - Sandra Barteit
- Heidelberg Institute of Global Health, Faculty of Medicine, University Hospital, Heidelberg University, Heidelberg, Germany
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Carvalho M, Hangan H. Modelling Weather Precipitation Intensity on Surfaces in Motion with Application to Autonomous Vehicles. Sensors (Basel) 2023; 23:8034. [PMID: 37836864 PMCID: PMC10575205 DOI: 10.3390/s23198034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 10/15/2023]
Abstract
With advances in the development of autonomous vehicles (AVs), more attention has been paid to the effects caused by adverse weather conditions. It is well known that the performance of self-driving vehicles is reduced when they are exposed to stressors that impair visibility or cause water or snow accumulation on sensor surfaces. This paper proposes a model to quantify weather precipitation, such as rain and snow, perceived by moving vehicles based on outdoor data. The modeling covers a wide range of parameters, such as varying the wind direction and realistic particle size distributions. The model allows the calculation of precipitation intensity on inclined surfaces of different orientations and on a circular driving path. The modeling results were partially validated against direct measurements carried out using a test vehicle. The model outputs showed a strong correlation with the experimental data for both rain and snow. Mitigation strategies for heavy precipitation on vehicles can be developed, and correlations between precipitation rate and accumulation level can be traced using the presented analytical model. A dimensional analysis of the problem highlighted the critical parameters that can help the design of future experiments. The obtained results highlight the importance of the angle of the sensing surface for the perceived precipitation level. The proposed model was used to analyze optimal orientations for minimization of the precipitation flux, which can help to determine the positioning of sensors on the surface of autonomous vehicles.
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Affiliation(s)
- Mateus Carvalho
- Department of Mechanical Engineering, Ontario Tech University, Oshawa, ON L1G 0C5, Canada;
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Haider A, Pigniczki M, Koyama S, Köhler MH, Haas L, Fink M, Schardt M, Nagase K, Zeh T, Eryildirim A, Poguntke T, Inoue H, Jakobi M, Koch AW. A Methodology to Model the Rain and Fog Effect on the Performance of Automotive LiDAR Sensors. Sensors (Basel) 2023; 23:6891. [PMID: 37571674 PMCID: PMC10422612 DOI: 10.3390/s23156891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023]
Abstract
In this work, we introduce a novel approach to model the rain and fog effect on the light detection and ranging (LiDAR) sensor performance for the simulation-based testing of LiDAR systems. The proposed methodology allows for the simulation of the rain and fog effect using the rigorous applications of the Mie scattering theory on the time domain for transient and point cloud levels for spatial analyses. The time domain analysis permits us to benchmark the virtual LiDAR signal attenuation and signal-to-noise ratio (SNR) caused by rain and fog droplets. In addition, the detection rate (DR), false detection rate (FDR), and distance error derror of the virtual LiDAR sensor due to rain and fog droplets are evaluated on the point cloud level. The mean absolute percentage error (MAPE) is used to quantify the simulation and real measurement results on the time domain and point cloud levels for the rain and fog droplets. The results of the simulation and real measurements match well on the time domain and point cloud levels if the simulated and real rain distributions are the same. The real and virtual LiDAR sensor performance degrades more under the influence of fog droplets than in rain.
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Affiliation(s)
- Arsalan Haider
- Institute for Driver Assistance Systems and Connected Mobility (IFM), Kempten University of Applied Sciences, Junkersstrasse 1A, 87734 Benningen, Germany
- Institute for Measurement Systems and Sensor Technology, Technical University of Munich, Theresienstrasse 90, 80333 Munich, Germany
| | - Marcell Pigniczki
- Institute for Driver Assistance Systems and Connected Mobility (IFM), Kempten University of Applied Sciences, Junkersstrasse 1A, 87734 Benningen, Germany
| | - Shotaro Koyama
- Advanced Vehicle Research Institute, Kanagawa Institute of Technology, Shimoogino 1030, Atsugi 243-0292, Japan
| | | | - Lukas Haas
- Institute for Driver Assistance Systems and Connected Mobility (IFM), Kempten University of Applied Sciences, Junkersstrasse 1A, 87734 Benningen, Germany
| | - Maximilian Fink
- Institute for Measurement Systems and Sensor Technology, Technical University of Munich, Theresienstrasse 90, 80333 Munich, Germany
| | | | - Koji Nagase
- Advanced Vehicle Research Institute, Kanagawa Institute of Technology, Shimoogino 1030, Atsugi 243-0292, Japan
| | - Thomas Zeh
- Institute for Driver Assistance Systems and Connected Mobility (IFM), Kempten University of Applied Sciences, Junkersstrasse 1A, 87734 Benningen, Germany
| | | | - Tim Poguntke
- Institute for Driver Assistance Systems and Connected Mobility (IFM), Kempten University of Applied Sciences, Junkersstrasse 1A, 87734 Benningen, Germany
| | - Hideo Inoue
- Advanced Vehicle Research Institute, Kanagawa Institute of Technology, Shimoogino 1030, Atsugi 243-0292, Japan
| | - Martin Jakobi
- Institute for Measurement Systems and Sensor Technology, Technical University of Munich, Theresienstrasse 90, 80333 Munich, Germany
| | - Alexander W. Koch
- Institute for Measurement Systems and Sensor Technology, Technical University of Munich, Theresienstrasse 90, 80333 Munich, Germany
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Nassikas NJ, Rifas-Shiman SL, Luttmann-Gibson H, Chen K, Blossom JC, Oken E, Gold DR, Rice MB. Precipitation and Adolescent Respiratory Health in the Northeast United States. Ann Am Thorac Soc 2023; 20:698-704. [PMID: 36749585 PMCID: PMC10174124 DOI: 10.1513/annalsats.202209-805oc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 02/06/2023] [Indexed: 02/08/2023] Open
Abstract
Rationale: With more frequent and intense precipitation events across the globe due to a changing climate, there is a need to understand the relationship between precipitation and respiratory health. Precipitation may trigger asthma exacerbations, but little is known about how precipitation affects lung function and airway inflammation in early adolescents. Objectives: To determine if short-term precipitation exposure is associated with lung function and airway inflammation in early adolescents and if ever having a diagnosis of asthma modifies associations of precipitation with lung function and airway inflammation. Methods: In a prospective prebirth cohort, Project Viva, that included 1,019 early adolescents born in the northeastern United States, we evaluated associations of 1-, 2-, 3-, and 7-day moving averages of precipitation in the preceding week and forced expiratory volume in 1 second, forced vital capacity, and fractional exhaled nitric oxide (FeNO) using linear regression. We used log-transformed FeNO with effect estimates presented as percentage change. We adjusted for maternal education and household income at enrollment; any smoking in the home in early adolescence; child sex, race/ethnicity, and ever asthma diagnosis; and age, height, weight, date, and season (as sine and cosine functions of visit date) at the early adolescent visit and moving averages for mean daily temperature (same time window as exposure). Results: In fully adjusted linear models, 3- and 7-day moving averages for precipitation were positively associated with FeNO but not lung function. Every 2-mm increase in the 7-day moving average for precipitation was associated with a 4.0% (95% confidence interval, 1.1, 6.9) higher FeNO. There was evidence of effect modification by asthma status: Precipitation was associated with lower forced vital capacity and higher FeNO among adolescents with asthma. We also found that outdoor aeroallergen sensitization (immunoglobulin E against common ragweed, oak, ryegrass, or silver birch) modified associations of precipitation with FeNO, with higher FeNO in sensitized adolescents compared with nonsensitized adolescents. The associations of precipitation with FeNO were not explained by relative humidity or air pollution exposure. Conclusions: We found that greater short-term precipitation may trigger airway inflammation in adolescents, particularly among those with asthma.
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Affiliation(s)
- Nicholas J. Nassikas
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Sheryl L. Rifas-Shiman
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
| | - Heike Luttmann-Gibson
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Kelly Chen
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Jeffrey C. Blossom
- Center for Geographic Analysis, Harvard University, Cambridge, Massachusetts; and
| | - Emily Oken
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Diane R. Gold
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Mary B. Rice
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
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Shoaib A, Salim N, Waseem S. Dengue surge in Pakistan amidst the torrential rains: The threat of a potential outbreak. J Med Virol 2023; 95:e28346. [PMID: 36424668 DOI: 10.1002/jmv.28346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/27/2022]
Abstract
With 390 million infections occurring globally and the infection putting half of the world's population at risk, dengue is an illness with potential, life-threatening manifestations such as plasma leakage and fluid retention, severe bleeding, and organ impairment. This disease is already lurking in the various regions of Pakistan, which was recently ravaged by decades' worst flood. With mosquitoes being its eminent transmission source, it is coherent that a country with massive flooding, accumulation of stagnant water, and lack of adequate drainage systems can lead to a dengue outbreak. Pakistan, a low-middle-income country, is still recuperating from the aftershocks of the pandemic, a recent cholera outbreak, and the massive economic destruction they caused, especially in the healthcare sector. Concerningly, the World Health Organization has already issued a "second catastrophe" warning for Pakistan in the aftermath of the fatal floods which have caused the destruction of hundreds of health facilities while physicians and medical workers on the ground scramble to combat outbreaks of waterborne and other illnesses. If the spread of dengue isn't contained immediately, it will destroy the healthcare systems across the country and result in massive fatalities. To avoid tragic consequences, the government and concerned authorities must devise plans to launch public health programs aimed at boosting knowledge of the disease, its symptoms, transmission, prevention, and control. In this commentary, we discuss the current spike of dengue virus, epidemiology, transmission patterns, and preventative efforts in the aftermath of Pakistan's disastrous floods.
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Affiliation(s)
- Aqsa Shoaib
- Karachi Medical and Dental College, Karachi, Sindh, Pakistan
| | - Najwa Salim
- Karachi Medical and Dental College, Karachi, Sindh, Pakistan
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KAWAMURA K. Geochemical studies of low molecular weight organic acids in the atmosphere: sources, formation pathways, and gas/particle partitioning. Proc Jpn Acad Ser B Phys Biol Sci 2023; 99:1-28. [PMID: 36631074 PMCID: PMC9851960 DOI: 10.2183/pjab.99.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/08/2022] [Indexed: 06/17/2023]
Abstract
Low molecular weight monocarboxylic acids (LMW monoacids, C1-C10) are the most abundant gaseous organic compound class in the atmosphere. Formic or acetic acid is the dominant volatile organic compound (VOC) in Earth's atmosphere. They can largely contribute to rainwater acidity, especially in the tropical forest, and react with alkaline metals, ammonia, and amines, contributing to new particle formation and secondary organic aerosol production. Gaseous and particulate LMW monoacids were abundantly reported in China. They can be directly emitted from fossil fuel combustion and biomass burring; however, the secondary formation is more important than primary emissions via the photochemical oxidation of anthropogenic and biogenic VOCs. In this paper, we review the distributions of LMW monoacids from urban, mountain, and marine sites as well as from rainwater and alpine snow samples and discuss their sources and formation mechanisms in the atmosphere. We also discuss their importance as cloud condensation nuclei (CCN) and provide future perspectives of LMW monoacids study in the warming world.
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Affiliation(s)
- Kimitaka KAWAMURA
- Chubu Institute for Advanced Studies, Chubu University, Kasugai, Japan
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Linnhoff C, Hofrichter K, Elster L, Rosenberger P, Winner H. Measuring the Influence of Environmental Conditions on Automotive Lidar Sensors. Sensors (Basel) 2022; 22:5266. [PMID: 35890948 PMCID: PMC9315550 DOI: 10.3390/s22145266] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/03/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Safety validation of automated driving functions is a major challenge that is partly tackled by means of simulation-based testing. The virtual validation approach always entails the modeling of automotive perception sensors and their environment. In the real world, these sensors are exposed to adverse influences by environmental conditions such as rain, fog, snow, etc. Therefore, such influences need to be reflected in the simulation models. In this publication, a novel data set is introduced and analyzed. This data set contains lidar data with synchronized reference measurements of weather conditions from a stationary long-term experiment. Recorded weather conditions comprise fog, rain, snow, and direct sunlight. The data are analyzed by pairing lidar values, such as the number of detections in the atmosphere, with weather parameters such as rain rate in mm/h. This results in expectation values, which can directly be utilized for stochastic modeling or model calibration and validation. The results show vast differences in the number of atmospheric detections, range distribution, and attenuation between the different sensors of the data set.
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Roth-Nebelsick A, Konrad W, Ebner M, Miranda T, Thielen S, Nebelsick JH. When rain collides with plants-patterns and forces of drop impact and how leaves respond to them. J Exp Bot 2022; 73:1155-1175. [PMID: 35038724 DOI: 10.1093/jxb/erac004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 06/14/2023]
Abstract
Raindrop impact on leaves is a common event which is of relevance for numerous processes, including the dispersal of pathogens and propagules, leaf wax erosion, gas exchange, leaf water absorption, and interception and storage of rainwater by canopies. The process of drop impact is complex, and its outcome depends on many influential factors. The wettability of plants has been recognized as an important parameter which is itself complex and difficult to determine for leaf surfaces. Other important parameters include leaf inclination angle and the ability of leaves to respond elastically to drop impact. Different elastic motions are initiated by drop impact, including local deformation, flapping, torsion, and bending, as well as 'swinging' of the petiole. These elastic responses, which occur on different time scales, can affect drop impact directly or indirectly, by changing the leaf inclination. An important feature of drop impact is splashing, meaning the fragmentation of the drop with ejection of satellite droplets. This process is promoted by the kinetic energy of the drop and leaf traits. For instance, a dense trichome cover can suppress splashing. Basic drop impact patterns are presented and discussed for a number of different leaf types, as well as some exemplary mosses.
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Affiliation(s)
- Anita Roth-Nebelsick
- State Museum of Natural History Stuttgart, Rosenstein 1, D-70191 Stuttgart, Germany
| | - Wilfried Konrad
- University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, D-72076 Tübingen, Germany
- Technical University of Dresden, Institute of Botany, Zellescher Weg 20b, D-01217 Dresden, Germany
| | - Martin Ebner
- University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, D-72076 Tübingen, Germany
| | - Tatiana Miranda
- Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen, Hölderlinstr. 12, D-72074 Tübingen, Germany
| | - Sonja Thielen
- University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, D-72076 Tübingen, Germany
| | - James H Nebelsick
- University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, D-72076 Tübingen, Germany
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Aune KT, Davis MF, Smith GS. Extreme Precipitation Events and Infectious Disease Risk: A Scoping Review and Framework for Infectious Respiratory Viruses. Int J Environ Res Public Health 2021; 19:165. [PMID: 35010425 PMCID: PMC8751052 DOI: 10.3390/ijerph19010165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 05/28/2023]
Abstract
Extreme precipitation events (EPE) change the natural and built environments and alter human behavior in ways that facilitate infectious disease transmission. EPEs are expected with high confidence to increase in frequency and are thus of great public health importance. This scoping review seeks to summarize the mechanisms and severity of impacts of EPEs on infectious diseases, to provide a conceptual framework for the influence of EPEs on infectious respiratory diseases, and to define areas of future study currently lacking in this field. The effects of EPEs are well-studied with respect to enteric, vector-borne, and allergic illness where they are shown to moderately increase risk of illness, but not well-understood in relation to infectious respiratory illness. We propose a framework for a similar influence of EPEs on infectious respiratory viruses through several plausible pathways: decreased UV radiation, increased ambient relative humidity, and changes to human behavior (increased time indoors and use of heating and cooling systems). However, limited work has evaluated meteorologic risk factors for infectious respiratory diseases. Future research is needed to evaluate the effects of EPEs on infectious respiratory diseases using individual-level case surveillance, fine spatial scales, and lag periods suited to the incubation periods of the disease under study, as well as a full characterization of susceptible, vulnerable, and sensitive population characteristics.
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Affiliation(s)
- Kyle T. Aune
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA;
| | - Meghan F. Davis
- Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA;
- Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Genee S. Smith
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA;
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Ceesay B, Taal A, Kalisa M, Odikro MA, Agbope D, Kenu E. Analysis of snakebite data in Volta and Oti Regions, Ghana, 2019. Pan Afr Med J 2021; 40:131. [PMID: 34909099 PMCID: PMC8641636 DOI: 10.11604/pamj.2021.40.131.28217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 02/16/2021] [Indexed: 11/11/2022] Open
Abstract
Introduction globally about 5.4 million people are affected by snakebite annually leading to 2.7 million cases of snakebite envenoming and 81,000-138,000 deaths. In sub-Saharan Africa, the burden of disease caused by snakebite is often underestimated despite its status as a category A neglected tropical disease. We reviewed snakebite data to determine the magnitude of snakebite by person, place, and time in the Volta and Oti Regions of Ghana. Methods we conducted a descriptive secondary data analysis using snakebite data from 2014-2018 extracted from the District Health Information and Management Systems (DHIMS 2) database. Data were analyzed descriptively by person, place, and time using summary statistics and results were presented in proportions and graphs. Missed outbreaks were determined through calculation of cumulative sum (CUSUM 2). Results a total of 2,973 cases of snakebites were reported over the 5 years of which 1675 (56.3%) were males. Majority 867 (29.2%) of snakebite victims were between 20-34 years of age with recorded 5-year average incidence of 24 snakebite cases per 100,000. Nkwanta North District recorded the highest cases 499 (16.8%) with most of the snakebite cases 2,411 (81%) recorded in the rainy season. Overall, there was a decreasing trend of snakebites and four missed snakebite outbreaks occurred during the period. No snakebite death was recorded. Conclusion a 5-year average snakebite incidence of 24 cases per 100,000 persons was recorded and Nkwanta North District recorded the highest cases with peaks occurring in rainy and harvesting seasons. Four outbreaks were missed. There is a need to conduct periodic data analysis for effective intervention programs.
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Affiliation(s)
- Baba Ceesay
- Ghana Field Epidemiology and Laboratory Training Programme (GFELTP), School of Public Health, University of Ghana, Accra, Ghana.,Ministry of Health, Banjul, The Gambia
| | - Abdoulie Taal
- Ghana Field Epidemiology and Laboratory Training Programme (GFELTP), School of Public Health, University of Ghana, Accra, Ghana.,Ministry of Health, Banjul, The Gambia
| | - Momodou Kalisa
- Ghana Field Epidemiology and Laboratory Training Programme (GFELTP), School of Public Health, University of Ghana, Accra, Ghana.,Ministry of Health, Banjul, The Gambia
| | - Magdalene Akos Odikro
- Ghana Field Epidemiology and Laboratory Training Programme (GFELTP), School of Public Health, University of Ghana, Accra, Ghana
| | | | - Ernest Kenu
- Ghana Field Epidemiology and Laboratory Training Programme (GFELTP), School of Public Health, University of Ghana, Accra, Ghana
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13
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D'Amelio PB, Ferreira AC, Fortuna R, Paquet M, Silva LR, Theron F, Doutrelant C, Covas R. Disentangling climatic and nest predator impact on reproductive output reveals adverse high-temperature effects regardless of helper number in an arid-region cooperative bird. Ecol Lett 2021; 25:151-162. [PMID: 34787354 PMCID: PMC9299450 DOI: 10.1111/ele.13913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/04/2021] [Accepted: 09/29/2021] [Indexed: 01/20/2023]
Abstract
Climate exerts a major influence on reproductive processes, and an understanding of the mechanisms involved and which factors might mitigate adverse weather is fundamental under the ongoing climate change. Here, we study how weather and nest predation influence reproductive output in a social species, and examine whether larger group sizes can mitigate the adverse effects of these factors. We used a 7‐year nest predator‐exclusion experiment on an arid‐region cooperatively breeding bird, the sociable weaver. We found that dry and, especially, hot weather were major drivers of nestling mortality through their influence on nest predation. However, when we experimentally excluded nest predators, these conditions were still strongly associated with nestling mortality. Group size was unimportant against nest predation and, although positively associated with reproductive success, it did not mitigate the effects of adverse weather. Hence, cooperative breeding might have a limited capacity to mitigate extreme weather effects.
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Affiliation(s)
- Pietro B D'Amelio
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa.,Centre d'Ecologie Fonctionnelle et Evolutive, CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, 34293, France
| | - André C Ferreira
- Centre d'Ecologie Fonctionnelle et Evolutive, CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, 34293, France.,BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, 4485-661, Portugal.,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, 4485-661, Portugal
| | - Rita Fortuna
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, 4485-661, Portugal.,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, 4485-661, Portugal.,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4099-002, Porto, Portugal
| | - Matthieu Paquet
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, SE-75007, Sweden
| | - Liliana R Silva
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, 4485-661, Portugal.,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, 4485-661, Portugal
| | - Franck Theron
- Centre d'Ecologie Fonctionnelle et Evolutive, CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, 34293, France.,BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, 4485-661, Portugal.,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, 4485-661, Portugal
| | - Claire Doutrelant
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa.,Centre d'Ecologie Fonctionnelle et Evolutive, CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, 34293, France
| | - Rita Covas
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa.,BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, 4485-661, Portugal.,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, 4485-661, Portugal
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14
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Azimzada A, Jreije I, Hadioui M, Shaw P, Farner JM, Wilkinson KJ. Quantification and Characterization of Ti-, Ce-, and Ag-Nanoparticles in Global Surface Waters and Precipitation. Environ Sci Technol 2021; 55:9836-9844. [PMID: 34181400 DOI: 10.1021/acs.est.1c00488] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Nanoparticle (NP) emissions to the environment are increasing as a result of anthropogenic activities, prompting concerns for ecosystems and human health. In order to evaluate the risk of NPs, it is necessary to know their concentrations in various environmental compartments on regional and global scales; however, these data have remained largely elusive due to the analytical difficulties of measuring NPs in complex natural matrices. Here, we measure NP concentrations and sizes for Ti-, Ce-, and Ag-containing NPs in numerous global surface waters and precipitation samples, and we provide insights into their compositions and origins (natural or anthropogenic). The results link NP occurrences and distributions to particle type, origin, and sampling location. Based on measurements from 46 sites across 13 countries, total Ti- and Ce-NP concentrations (regardless of origin) were often found to be within 104 to 107 NP mL-1, whereas Ag NPs exhibited sporadic occurrences with low concentrations generally up to 105 NP mL-1. This generally corresponded to mass concentrations of <1 ng L-1 for Ag-NPs, <100 ng L-1 for Ce-NPs, and <10 μg L-1 for Ti-NPs, given that measured sizes were often below 15 nm for Ce- and Ag-NPs and above 30 nm for Ti-NPs. In view of current toxicological data, the observed NP levels do not yet appear to exceed toxicity thresholds for the environment or human health; however, NPs of likely anthropogenic origins appear to be already substantial in certain areas, such as urban centers. This work lays the foundation for broader experimental NP surveys, which will be critical for reliable NP risk assessments and the regulation of nano-enabled products.
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Affiliation(s)
- Agil Azimzada
- Department of Chemistry, University of Montreal, Montreal, Quebec H3C 3J7, Canada
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Ibrahim Jreije
- Department of Chemistry, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - Madjid Hadioui
- Department of Chemistry, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - Phil Shaw
- Nu Instruments, Wrexham LL13 9XS, U.K
| | - Jeffrey M Farner
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Kevin J Wilkinson
- Department of Chemistry, University of Montreal, Montreal, Quebec H3C 3J7, Canada
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15
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Knechtle B, Valero D, Villiger E, Alvero Cruz JR, Scheer V, Rosemann T, Nikolaidis PT. Elite Marathoners Run Faster With Increasing Temperatures in Berlin Marathon. Front Physiol 2021; 12:649898. [PMID: 34305629 PMCID: PMC8293098 DOI: 10.3389/fphys.2021.649898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/11/2021] [Indexed: 11/16/2022] Open
Abstract
The influence of environmental conditions has been investigated for different marathon races, but not for the Berlin Marathon, the fastest marathon race course in the world. The aim of this study was to investigate the potential influence of environmental conditions such as temperature, precipitation, sunshine, and atmospheric pressure on marathon race times in the Berlin Marathon since its first event in 1974–2019. A total of n = 882,540 valid finisher records were available for analysis, of which 724,135 correspond to male and 158,405 to female runners. We performed analyses regarding performance levels considering all finishers, the top 3, the top 10, and the top 100 women and men. Within the 46 years of Berlin marathons under study, there was some level of precipitation for 18 years, and 28 years without any rain. Sunshine was predominant in 25 of the events, whilst in the other 21, cloud cover was predominant. There was no significant trend with time in any of the weather variables (e.g., no increase in temperature across the years). Overall runners became slower with increasing temperature and sunshine duration, however, elite runners (i.e., top 3 and top 10) seemed to run faster and improved their race times when the temperature increased (with women improving more than men). Top 10 women seemed to benefit more from increasing temperatures than top 10 males, and male top 100 runners seemed to benefit more from increasing temperatures than female top 100 runners. In the top three sub-group, no differences were observed between male and female correlations. In summary, in marathoners competing in the Berlin Marathon between 1974 and 2019, increasing temperatures and sunshine duration showed a different effect on different performance levels where overall runners (i.e., the general mass of runners) became slower with increasing temperature and sunshine duration, but elite runners (i.e., top 3, top 10) became faster with increasing temperatures where sex differences exist.
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Affiliation(s)
- Beat Knechtle
- Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland.,Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - David Valero
- Ultra Sports Science Foundation, Pierre-Benite, France
| | - Elias Villiger
- Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - José Ramón Alvero Cruz
- Deparamento de Fisiología Humana, Histología, Anatomia Patológica y Educación Física y Deportiva, Málaga, Spain
| | - Volker Scheer
- Ultra Sports Science Foundation, Pierre-Benite, France
| | - Thomas Rosemann
- Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - Pantelis T Nikolaidis
- School of Health and Caring Sciences, University of West Attica, Athens, Greece.,Laboratory of Exercise Testing, Hellenic Air Force Academy, Acharnes, Greece
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16
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Inaba M, Naito H, Muramatsu T, Yamada T, Sakata T, Nakao A. Hospital Evacuation Assistance from Public and Private Resources: Lessons Learned from the 2018 Western Japan Floods. Acta Med Okayama 2021; 74:359-364. [PMID: 32843768 DOI: 10.18926/amo/60375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
During major flooding in June/July 2018, the Mabi Memorial Hospital in Kurashiki, Okayama, Japan was flooded and patients were stranded in the hospital. Peace Winds Japan, a non-governmental organization, collaborated with the Japanese Disaster Medical Assistance Team and Self-Defense Force Public to transport 8 critical patients from the hospital by helicopter. Ultimately, 54 patients and hospital staff members were safely evacuated. The evacuation was accomplished without any casualties, despite the severe conditions. Public and private organizations can work together and continue to seek ways to collaborate and cooperate in disaster settings.
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Affiliation(s)
- Mototaka Inaba
- Department of Emergency, Critical Care, and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, .,Peace Winds Japan, Jinseki, Hiroshima 720-1622, Japan
| | - Hiromichi Naito
- Department of Emergency, Critical Care, and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | | | - Taihei Yamada
- Department of Emergency, Critical Care, and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Taizo Sakata
- Peace Winds Japan, Jinseki, Hiroshima 720-1622, Japan
| | - Atsunori Nakao
- Department of Emergency, Critical Care, and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
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17
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Dobránszki J. Application of naturally occurring mechanical forces in in vitro plant tissue culture and biotechnology. Plant Signal Behav 2021; 16:1902656. [PMID: 33902398 PMCID: PMC8143234 DOI: 10.1080/15592324.2021.1902656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Cues and signals of the environment in nature can be either beneficial or detrimental from the growth and developmental perspectives. Plants, despite their limited spatial mobility, have developed advanced strategies to overcome the various and changing environmental impacts including stresses. In vitro plantlets, tissues and cells are constantly exposed to the influence of their environment that is well controlled. Light has a widely known morphogenetic effect on plants; however, other physical cues and signals are at least as important but were often neglected. In this review, I summarize our knowledge about the role of the mechanical stimuli, like sound, ultrasound, touch, or wounding in in vitro plant cultures. I summarize the molecular, biochemical, physiological, growth, and developmental changes they cause and how these processes are controlled; moreover, how their regulating or stimulating roles are applied in various plant biotechnological applications. Recent studies revealed that mechanical forces can be used for affecting the plant development and growth in plant tissue culture efficiently, and for increasing the efficacy of other plant biotechnological methods, like genetic transformation and secondary metabolite production.
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Affiliation(s)
- Judit Dobránszki
- Centre for Agricultural Genomics and Biotechnology, FAFSEM, University of Debrecen, Nyíregyháza, Hungary
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18
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Scheer V, Valero D, Villiger E, Alvero Cruz JR, Rosemann T, Knechtle B. The Optimal Ambient Conditions for World Record and World Class Performances at the Berlin Marathon. Front Physiol 2021; 12:654860. [PMID: 34122130 PMCID: PMC8194270 DOI: 10.3389/fphys.2021.654860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 04/30/2021] [Indexed: 11/13/2022] Open
Abstract
The “Berlin Marathon” is the fastest marathon racecourse in the world and has witnessed 11 world records (WRs; eight in men and three in women). Weather conditions can have an important impact on race time and we therefore examined the influence of environmental conditions (i.e., temperature, sunshine, precipitation, barometric pressure, and cloud cover) on WRs and elite (i.e., winner, top three and top 10 finishers) marathon performances of men and women at the “Berlin Marathon” between 1974 and 2019. Average world record marathon times in men were 2:03:52 ± 0:01:19 h:min:s and 2:25:05 ± 0:08:25 h:min:s in females (p < 0.05). Male competitions were held 44 times (mean winning time: 2:09:48 ± 0:09:15 h:min:s) and female competitions 41 times (mean winning time: 02:30:35 ± 0:19:09 h:min:s; p < 0.05). World record performances were set at mean temperatures of 18.61 ± 2.59°C for men and 13.07 ± 4.01°C for women (p > 0.05). The ideal environmental conditions for world record performances for men were temperatures of 18.61°C (p > 0.05), sunny, mostly dry days, with higher atmospheric pressure and little cloud cover (all p > 0.05). In women, ideal conditions for world records performances were temperatures of 13.07°C (p > 0.05), with low atmospheric pressure (p > 0.05), but significantly more rain (p < 0.05), and with no sunshine (p < 0.05) and cloud cover (p < 0.05). With elite performances, the ideal temperatures were of 17.36 ± 4.33°C for men and 17.93 ± 4.07°C for women (p > 0.05), with little to no rain, and moderate cloud cover and sunshine (p > 0.05). In summary, novel findings are, that environmental conditions in world records performances differ between men and women, with women obtaining world records in bad weather (with rain, cloud cover, and no sunshine) and men in good weather (sunny, mostly dry days, with little cloud cover). Larger sample sizes are needed to examine sex differences and environmental conditions on world record marathon performances.
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Affiliation(s)
- Volker Scheer
- Ultra Sports Science Foundation, Pierre-Bénite, France
| | - David Valero
- Ultra Sports Science Foundation, Pierre-Bénite, France
| | - Elias Villiger
- Institute of Primary Care, University Hospital Zürich, Zürich, Switzerland
| | - José Ramón Alvero Cruz
- Departamento de Fisiología Humana, Histología, Anatomía, Patológica y Educación Física y Deportiva, Universidad de Málaga, Málaga, Spain
| | - Thomas Rosemann
- Institute of Primary Care, University Hospital Zürich, Zürich, Switzerland
| | - Beat Knechtle
- Institute of Primary Care, University Hospital Zürich, Zürich, Switzerland.,Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland
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19
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Knechtle B, Valero D, Villiger E, Alvero-Cruz JR, Nikolaidis PT, Cuk I, Rosemann T, Scheer V. Trends in Weather Conditions and Performance by Age Groups Over the History of the Berlin Marathon. Front Physiol 2021; 12:654544. [PMID: 34054573 PMCID: PMC8155689 DOI: 10.3389/fphys.2021.654544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 04/20/2021] [Indexed: 11/13/2022] Open
Abstract
The effect of different environmental conditions such as temperature, wind, barometric pressure, and precipitation has been well investigated in elite marathoners, but not by age categories (i.e., age group marathoners). The aim of the study was to investigate the potential influence of environmental conditions such as temperature, precipitation, and atmospheric pressure on marathon performance in age group marathoners competing in the ‘Berlin Marathon’ from 1974 to 2019. A total of 869,474 valid finisher records were available for analysis, of which 711,136 correspond to males and 158,338 to females. The influence of temperature, atmospheric pressure, and precipitation on marathon race times was investigated in age group marathoners grouped in 5-year-intervals. Within the 46 years of Berlin marathons under investigation, there was some level of precipitation for 18 years, and 28 years without any rain. Sunshine was predominant in 25 of the events, whilst in the other 21 years, cloud cover was predominant. Marathon race times were significantly and positively correlated with age (i.e., older runners were slower than younger runners) where the correlation was higher for males than for females. Marathon race times were significantly and positively correlated with both the hours of sunshine and the daily maximum temperature. The fastest marathon runners (meaning the minimum times) achieved the fastest race times on race days with higher maximum temperatures (i.e., 15–30°C). Daily maximum temperatures showed an influence on age group marathoners from age group 35–40 years and older. Higher precipitation levels impaired performance across most age groups. In summary, higher daily maximum temperatures (i.e., >15°C) and higher precipitation levels impaired performance of master marathoners (i.e., 35–40 years and older) competing in the ‘Berlin Marathon’ in the last 45 years. Master marathoners should start in marathon races with temperatures < 15°C and no precipitation in order to achieve a fast marathon race time.
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Affiliation(s)
- Beat Knechtle
- Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland.,Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - David Valero
- Ultra Sports Science Foundation, Pierre-Bénite, France
| | - Elias Villiger
- Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - José R Alvero-Cruz
- Departamento de Fisiología Humana, Histología, Anatomia Patológica y Educación Física y Deportiva, University of Málaga, Málaga, Spain
| | - Pantelis T Nikolaidis
- School of Health and Caring Sciences, University of West Attica, Athens, Greece.,Laboratory of Exercise Testing, Hellenic Air Force Academy, Acharnes, Greece
| | - Ivan Cuk
- Faculty of Physical Education and Sports Management, Singidunum University, Belgrade, Serbia
| | - Thomas Rosemann
- Institute of Primary Care, University Hospital Zurich, Zurich, Switzerland
| | - Volker Scheer
- Ultra Sports Science Foundation, Pierre-Bénite, France
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20
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Kälin RE, Cai L, Li Y, Zhao D, Zhang H, Cheng J, Zhang W, Wu Y, Eisenhut K, Janssen P, Schmitt L, Enard W, Michels F, Flüh C, Hou M, Kirchleitner SV, Siller S, Schiemann M, Andrä I, Montanez E, Giachino C, Taylor V, Synowitz M, Tonn JC, von Baumgarten L, Schulz C, Hellmann I, Glass R. TAMEP are b rain tumor parenchymal cells controlling neoplastic angiogenesis and progression. Cell Syst 2021; 12:248-262.e7. [PMID: 33592194 DOI: 10.1016/j.cels.2021.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 04/07/2020] [Accepted: 01/04/2021] [Indexed: 12/13/2022]
Abstract
Aggressive brain tumors like glioblastoma depend on support by their local environment and subsets of tumor parenchymal cells may promote specific phases of disease progression. We investigated the glioblastoma microenvironment with transgenic lineage-tracing models, intravital imaging, single-cell transcriptomics, immunofluorescence analysis as well as histopathology and characterized a previously unacknowledged population of tumor-associated cells with a myeloid-like expression profile (TAMEP) that transiently appeared during glioblastoma growth. TAMEP of mice and humans were identified with specific markers. Notably, TAMEP did not derive from microglia or peripheral monocytes but were generated by a fraction of CNS-resident, SOX2-positive progenitors. Abrogation of this progenitor cell population, by conditional Sox2-knockout, drastically reduced glioblastoma vascularization and size. Hence, TAMEP emerge as a tumor parenchymal component with a strong impact on glioblastoma progression.
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Affiliation(s)
- Roland E Kälin
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Linzhi Cai
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Yuping Li
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Dongxu Zhao
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Huabin Zhang
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Jiying Cheng
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Wenlong Zhang
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Neurology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Yingxi Wu
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Katharina Eisenhut
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Philipp Janssen
- Anthropology and Human Genomics, Department Biology II, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Lukas Schmitt
- Anthropology and Human Genomics, Department Biology II, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Wolfgang Enard
- Anthropology and Human Genomics, Department Biology II, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Friederike Michels
- Department of Neurosurgery, University Hospital Center Schleswig Holstein, 24105 Kiel, Germany
| | - Charlotte Flüh
- Department of Neurosurgery, University Hospital Center Schleswig Holstein, 24105 Kiel, Germany
| | - Mengzhuo Hou
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | | | - Sebastian Siller
- Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Matthias Schiemann
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, 81675 München, Germany
| | - Immanuel Andrä
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, 81675 München, Germany
| | - Eloi Montanez
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Physiological Sciences, Faculty of Medicine and Health Sciences, University of Barcelona and Bellvitge Biomedical Research Institute (IDIBELL), 08907 Hospitalet de Llobregat, Spain
| | - Claudio Giachino
- Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Verdon Taylor
- Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Michael Synowitz
- Department of Neurosurgery, University Hospital Center Schleswig Holstein, 24105 Kiel, Germany
| | - Jörg-Christian Tonn
- Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany; German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), Partner Site Munich, 69120 Heidelberg, Germany
| | - Louisa von Baumgarten
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Neurology, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Christian Schulz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, 81377 Munich, Germany; German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, 80333 Munich, Germany
| | - Ines Hellmann
- Anthropology and Human Genomics, Department Biology II, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Rainer Glass
- Neurosurgical Research, University Hospital, LMU Munich, 81377 Munich, Germany; Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), Partner Site Munich, 69120 Heidelberg, Germany.
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21
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Heyer E, Cimadom A, Wappl C, Tebbich S. Parental care in the Small Tree Finch Camarhynchus parvulus in relation to parasitism and environmental factors. Ibis (Lond 1859) 2021; 163:137-149. [PMID: 33362293 PMCID: PMC7754105 DOI: 10.1111/ibi.12845] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/28/2020] [Indexed: 05/30/2023]
Abstract
The parental food compensation hypothesis suggests that parents may compensate for the negative effects of parasites on chicks by increased food provisioning. However, this ability differs widely among host species and may also depend on ecological factors such as adverse weather conditions and habitat quality. Although weed management can improve habitat quality, management measures can bring about a temporary decrease in food availability and thus may reduce parents' ability to provide their nestlings with enough energy. In our study we investigated the interaction of parasitism and weed management, and the influence of climate on feeding rates in a Darwin's tree finch species, which is negatively impacted by two invasive species. The larvae of the invasive parasitic fly Philornis downsi ingest the blood and body tissues of tree finch nestlings, and the invasive Blackberry Rubus niveus affects one of the main habitats of Darwin's tree finches. We compared parental food provisioning of the Small Tree Finch Camarhynchus parvulus in parasitized and parasite-free nests in three different areas, which differed in invasive weed management (no management, short-term and long-term management). In a parasite reduction experiment, we investigated whether the Small Tree Finch increases food provisioning rates to nestlings when parasitized and whether this ability depends on weed management conditions and precipitation. Our results provide no evidence that Small Tree Finches can compensate with additional food provisioning when parasitized with P. downsi. However, we found an increase in male effort in the short-term management area, which might indicate that males compensate for lower food quality with increased provisioning effort. Furthermore, parental food provisioning was lower during rainfall, which provides an explanation for the negative influence of rain on breeding success found in earlier studies. Like other Darwin's finches, the Small Tree Finch seems to lack the ability to compensate for the negative effects of P. downsi parasitism, which is one explanation for why this invasive parasite has such a devastating effect on this host species.
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Affiliation(s)
- Eileen Heyer
- Department of Behavioural BiologyUniversity of ViennaAlthanstraße 141090ViennaAustria
| | - Arno Cimadom
- Department of Behavioural BiologyUniversity of ViennaAlthanstraße 141090ViennaAustria
| | - Christian Wappl
- Department of Behavioural BiologyUniversity of ViennaAlthanstraße 141090ViennaAustria
| | - Sabine Tebbich
- Department of Behavioural BiologyUniversity of ViennaAlthanstraße 141090ViennaAustria
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22
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Yu YM, Li XX, Xie D, Wang H. Horizontal orientation of zygomorphic flowers: significance for rain protection and pollen transfer. Plant Biol (Stuttg) 2021; 23:156-161. [PMID: 33073503 DOI: 10.1111/plb.13197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Floral traits are recognized to have evolved under selection for abiotic and biotic factors. Complex zygomorphic flowers usually face horizontally. It has been proved that a horizontal orientation facilitates pollinator recognition and pollination efficiency, but its significance in adaptation to abiotic factors remains unknown. The floral orientation of Abelia × grandiflora naturally varies around horizontal (with an angle of -30 to +33° between the floral main axis and the horizontal). We examined whether three different floral orientations affected flower thermal conditions, response to rain and pollination. Results showed that floral orientation had no effect on diurnal variations in flower temperature. The anthers of all three flower orientations were wetted by rainfall, but the inclined upward-facing flowers contained significantly more rainwater. The horizontal flowers received significantly higher visitation by hawkmoths and had a higher stigmatic pollen load. In contrast, the upward flower orientation reduced pollination precision, while downward-facing flowers had decreased pollinator attraction. This study indicates that horizontal flowers may have evolved as a trade-off between rain protection and pollination. Zygomorphic flowers that deviate from a horizontal orientation may have lower fitness because of flower flooding by rainwater and decreased pollen transfer.
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Affiliation(s)
- Y-M Yu
- College of Horticulture & Forestry Sciences/Hubei Engineering Technology Research Center for Forestry Information, Huazhong Agricultural University, Wuhan, China
| | - X-X Li
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing, China
| | - D Xie
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - H Wang
- College of Horticulture & Forestry Sciences/Hubei Engineering Technology Research Center for Forestry Information, Huazhong Agricultural University, Wuhan, China
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23
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Jitsuiki K, Ohsaka H, Shitara J, Ishibashi M, Suzuki M, Nozawa Y, Yanagawa Y. Reaction of Juntendo Shizuoka Hospital at Izu Peninsula to Typhoon Hagibis (2019) and an Analysis of Twitter Concerning Izunokuni City. Disaster Med Public Health Prep 2020;:1-6. [PMID: 32959747 DOI: 10.1017/dmp.2020.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE This research was carried out to report the activity of the headquarters for disaster control at our hospital, and investigate the usefulness of obtaining information from Twitter when Typhoon Hagibis hit Izu Peninsula. METHODS First, we recounted the activity of the headquarters for disaster control. We then collected information from Twitter from October 12-14, 2019, using the keyword Izunokuni.' We took into consideration the contents of Twitter user posts as well as the number of reactions ('retweets' and 'likes'). Twitter information was classified into photo (+) and (-) groups, depending on whether or not the post had a photo or video included. The number of reactions between the two groups was then analyzed. RESULTS We counted 122 Twitter posts containing Hagibis-related information for Izunokuni City. The average number of both 'retweets' and 'likes' in the photo (+) group were significantly greater than those in the photo (-) group. All photos and videos depicted specific places in Izunokuni City and included actual footage of disaster scenes or local warning signs. CONCLUSION Based on our experience at the headquarters for disaster control during Typhoon Hagibis, Twitter was considered to be a useful tool for obtaining local disaster information based on its timeliness, reality and specificity.
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Huggins TJ, E F, Chen K, Gong W, Yang L. Infrastructural Aspects of Rain-Related Cascading Disasters: A Systematic Literature Review. Int J Environ Res Public Health 2020; 17:ijerph17145175. [PMID: 32709109 PMCID: PMC7400172 DOI: 10.3390/ijerph17145175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/16/2022]
Abstract
Cascading disasters progress from one hazard event to a range of interconnected events and impacts, with often devastating consequences. Rain-related cascading disasters are a particularly frequent form of cascading disasters in many parts of the world, and they are likely to become even more frequent due to climate change and accelerating coastal development, among other issues. (1) Background: The current literature review extended previous reviews of documented progressions from one natural hazard event to another, by focusing on linkages between rain-related natural hazard triggers and infrastructural impacts. (2) Methods: A wide range of case studies were reviewed using a systematic literature review protocol. The review quality was enhanced by only including case studies that detailed mechanisms that have led to infrastructural impacts, and which had been published in high-quality academic journals. (3) Results: A sum of 71 articles, concerning 99 case studies of rain-related disasters, were fully reviewed. Twenty-five distinct mechanisms were identified, as the foundation for a matrix running between five different natural hazards and eight types of infrastructural impacts. (4) Conclusion: Relatively complex quantitative methods are needed to generate locality-specific, cascading disaster likelihoods and scenarios. Appropriate methods can leverage the current matrix to structure both Delphi-based approaches and network analysis using longitudinal data.
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Affiliation(s)
- Thomas J. Huggins
- Department of Statistics & Data Science, Southern University of Science and Technology, Shenzhen 518055, China; (T.J.H.); (F.E.); (K.C.); (W.G.)
- Division of Science & Technology, BNU-HKBU United International College, Zhuhai 519085, China
| | - Feiyu E
- Department of Statistics & Data Science, Southern University of Science and Technology, Shenzhen 518055, China; (T.J.H.); (F.E.); (K.C.); (W.G.)
| | - Kangming Chen
- Department of Statistics & Data Science, Southern University of Science and Technology, Shenzhen 518055, China; (T.J.H.); (F.E.); (K.C.); (W.G.)
| | - Wenwu Gong
- Department of Statistics & Data Science, Southern University of Science and Technology, Shenzhen 518055, China; (T.J.H.); (F.E.); (K.C.); (W.G.)
| | - Lili Yang
- Department of Statistics & Data Science, Southern University of Science and Technology, Shenzhen 518055, China; (T.J.H.); (F.E.); (K.C.); (W.G.)
- Correspondence: ; Tel.: +86-0755-8801-5917
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25
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Mechan Llontop ME, Hurley K, Tian L, Bernal Galeano VA, Wildschutte HK, Marine SC, Yoder KS, Vinatzer BA. Exploring Rain as Source of Biological Control Agents for Fire Blight on Apple. Front Microbiol 2020; 11:199. [PMID: 32117187 PMCID: PMC7033628 DOI: 10.3389/fmicb.2020.00199] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/28/2020] [Indexed: 01/20/2023] Open
Abstract
Poor survival on plants can limit the efficacy of Biological Control Agents (BCAs) in the field. Yet bacteria survive in the atmosphere, despite their exposure to high solar radiation and extreme temperatures. If conditions in the atmosphere are similar to, or more extreme than, the environmental conditions on the plant surface, then precipitation may serve as a reservoir of robust BCAs. To test this hypothesis, two hundred and fifty-four rain-borne isolates were screened for in vitro inhibition of Erwinia amylovora, the causal agent of fire blight, as well as of other plant pathogenic bacteria, fungi and oomycetes. Two isolates showed strong activity against E. amylovora and other plant pathogenic bacteria, while other isolates showed activity against fungal and oomycete pathogens. Survival assays suggested that the two isolates that inhibited E. amylovora were able to survive on apple blossoms and branches similarly to E. amylovora. Pathogen population size and associated fire blight symptoms were significantly reduced when detached apple blossoms were treated with the two isolates before pathogen inoculation, however, disease reduction on attached blossoms within an orchard was inconsistent. Using whole genome sequencing, the isolates were identified as Pantoea agglomerans and P. ananatis, respectively. A UV-mutagenesis screen pointed to a phenazine antibiotic D-alanylgriseoluteic acid synthesis gene cluster as being at the base of the antimicrobial activity of the P. agglomerans isolate. Our work reveals the potential of precipitation as an under-explored source of BCAs, whole genome sequencing as an effective approach to precisely identify BCAs, and UV-mutagenesis as a technically simple screen to investigate the genetic basis of BCAs. More field trials are needed to determine the efficacy of the identified BCAs in fire blight control.
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Affiliation(s)
| | - Kelly Hurley
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Long Tian
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | | | - Hans K. Wildschutte
- Department of Biological Sciences, Bowling Green State University, Bowling Green, OH, United States
| | - Sasha C. Marine
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, United States
| | - Keith S. Yoder
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
- Alson H. Smith Jr. Agricultural Research and Extension Center, Virginia Tech, Winchester, VA, United States
| | - Boris A. Vinatzer
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
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26
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Lehmann MM, Goldsmith GR, Mirande-Ney C, Weigt RB, Schönbeck L, Kahmen A, Gessler A, Siegwolf RTW, Saurer M. The 18 O-signal transfer from water vapour to leaf water and assimilates varies among plant species and growth forms. Plant Cell Environ 2020; 43:510-523. [PMID: 31732962 DOI: 10.1111/pce.13682] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The 18 O signature of atmospheric water vapour (δ18 OV ) is known to be transferred via leaf water to assimilates. It remains, however, unclear how the 18 O-signal transfer differs among plant species and growth forms. We performed a 9-hr greenhouse fog experiment (relative humidity ≥ 98%) with 18 O-depleted water vapour (-106.7‰) on 140 plant species of eight different growth forms during daytime. We quantified the 18 O-signal transfer by calculating the mean residence time of O in leaf water (MRTLW ) and sugars (MRTSugars ) and related it to leaf traits and physiological drivers. MRTLW increased with leaf succulence and thickness, varying between 1.4 and 10.8 hr. MRTSugars was shorter in C3 and C4 plants than in crassulacean acid metabolism (CAM) plants and highly variable among species and growth forms; MRTSugars was shortest for grasses and aquatic plants, intermediate for broadleaf trees, shrubs, and herbs, and longest for conifers, epiphytes, and succulents. Sucrose was more sensitive to δ18 OV variations than other assimilates. Our comprehensive study shows that plant species and growth forms vary strongly in their sensitivity to δ18 OV variations, which is important for the interpretation of δ18 O values in plant organic material and compounds and thus for the reconstruction of climatic conditions and plant functional responses.
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Affiliation(s)
- Marco M Lehmann
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
| | - Gregory R Goldsmith
- Schmid College of Science and Technology, Chapman University, Orange, CA, 92866
| | | | - Rosemarie B Weigt
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
| | - Leonie Schönbeck
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
| | - Ansgar Kahmen
- Department of Environmental Sciences-Botany, University of Basel, Basel, 4056, Switzerland
| | - Arthur Gessler
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
| | - Rolf T W Siegwolf
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
| | - Matthias Saurer
- Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland
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27
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Altenbrunner-Martinek B, Witek M, Koppatz K, Freissmuth M, Kraft A, Sutter C, Torres S, Gelfert C, Wittek T. Effect of rain on absorption after transdermal application of flunixin in calves. J Vet Pharmacol Ther 2019; 43:87-90. [PMID: 31833566 PMCID: PMC7003742 DOI: 10.1111/jvp.12829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 11/04/2019] [Accepted: 11/19/2019] [Indexed: 11/27/2022]
Abstract
Flunixin is a nonsteroidal anti‐inflammatory drug (NSAID) that has anti‐inflammatory, anti‐pyretic, and analgesic effects. Recently, a novel transdermal formulation was developed (Finadyne® Transdermal, MSD Animal Health) and is now the first NSAID registered to be administered as a pour‐on product in cattle. According to the manufacturer's instructions, the pour‐on product should be applied only to dry skin and exposure to rain should be avoided for at least 6 hr after application. The objective of the study was to evaluate the effect of simulated exposure to light or heavy rain on flunixin absorption and bioavailability within the first 4 hr after administration. Therefore, an isocratic HPLC method was developed to quantify flunixin concentrations in bovine serum by UV detection. Light rain decreased flunixin absorption only when rain started immediately after flunixin administration, while light rain starting more than 30 min after administration of flunixin had no effect on absorption. Absorption and bioavailability of flunixin was impacted under simulated heavy rain conditions, when exposure to rain occurred within one hour after the application of the pour‐on formulation, but not later.
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Affiliation(s)
| | - Martin Witek
- Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
| | - Karl Koppatz
- Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
| | - Michael Freissmuth
- Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
| | - Alinta Kraft
- Clinic for Ruminants, University for Veterinary Medicine Vienna, Vienna, Austria
| | - Charlene Sutter
- Clinic for Ruminants, University for Veterinary Medicine Vienna, Vienna, Austria
| | | | | | - Thomas Wittek
- Clinic for Ruminants, University for Veterinary Medicine Vienna, Vienna, Austria
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28
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Chen C, Harvey JA, Biere A, Gols R. Rain downpours affect survival and development of insect herbivores: the specter of climate change? Ecology 2019; 100:e02819. [PMID: 31310666 PMCID: PMC6899732 DOI: 10.1002/ecy.2819] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/24/2019] [Accepted: 06/13/2019] [Indexed: 11/05/2022]
Abstract
Changes in the frequency, duration, and intensity of rainfall events are among the abiotic effects predicted under anthropogenic global warming. Heavy downpours may profoundly affect the development and survival of small organisms such as insects. Here, we examined direct (physically on the insects) and indirect (plant-mediated) effects of simulated downpours on the performance of caterpillars of two lepidopteran herbivores (Plutella xylostella and Pieris brassicae) feeding on black mustard (Brassica nigra) plants. Host plants were exposed to different rainfall regimes both before and while caterpillars were feeding on the plants in an attempt to separate direct and indirect (plant-mediated) effects of rainfall on insect survival and development. In two independent experiments, downpours were simulated as a single long (20 min) or as three short (5 min) daily events. Downpours had a strong negative direct effect on the survival of P. xylostella, but not on that of P. brassicae. Direct effects of downpours consistently increased development time of both herbivore species, whereas effects on body mass depended on herbivore species and downpour frequency. Caterpillar disturbance by rain and recorded microclimatic cooling by 5°C may explain extended immature development. Indirect, plant-mediated effects of downpours on the herbivores were generally small, despite the fact that sugar concentrations were reduced and herbivore induction of secondary metabolites (glucosinolates) was enhanced in plants exposed to rain. Changes in the frequency of precipitation events due to climate change may impact the survival and development of insect herbivores differentially. Broader effects of downpours on insects and other arthropods up the food chain could seriously impair and disrupt trophic interactions, ultimately destabilizing communities.
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Affiliation(s)
- Cong Chen
- Department of Terrestrial EcologyNetherlands Institute of EcologyDroevendaalsesteeg 10Wageningen6708 PBThe Netherlands
- Department of Ecological ScienceSection Animal EcologyVU University AmsterdamDe Boelelaan 1085Amsterdam1081 HVThe Netherlands
| | - Jeffrey A. Harvey
- Department of Terrestrial EcologyNetherlands Institute of EcologyDroevendaalsesteeg 10Wageningen6708 PBThe Netherlands
- Department of Ecological ScienceSection Animal EcologyVU University AmsterdamDe Boelelaan 1085Amsterdam1081 HVThe Netherlands
| | - Arjen Biere
- Department of Terrestrial EcologyNetherlands Institute of EcologyDroevendaalsesteeg 10Wageningen6708 PBThe Netherlands
| | - Rieta Gols
- Laboratory of EntomologyWageningen University & ResearchDroevendaalsesteeg 1Wageningen6708 PBThe Netherlands
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29
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Ehelepola NDB, Ariyaratne K, Dissanayake WP. The correlation between local weather and leptospirosis incidence in Kandy district, Sri Lanka from 2006 to 2015. Glob Health Action 2019; 12:1553283. [PMID: 31154987 PMCID: PMC6327921 DOI: 10.1080/16549716.2018.1553283] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Background: Leptospirosis is an important public health problem in Sri Lanka. Most people become infected by contact with leptospires in soil and in surface water. Survival of leptospires in the environment depends upon the moisture in soil, humidity, temperature and surface water. Leptospires are spread by flood water and waterways. Therefore, the weather of an area influences the leptospirosis incidence of that area. Objectives: To find out the correlations between the leptospirosis incidence in the district of Kandy, Sri Lanka, and local weather variables and then to explore the utility of the findings. Methods: We gathered data on reported leptospirosis cases in the Kandy district and mid-year population data and calculated weekly incidences for 2006 to 2015. Daily weather data from Katugastota weather station was obtained and converted into weekly data. We plotted time series graphs and observed the correlation between six aggregated weather parameters and leptospirosis incidence. Those weather parameters were rainfall, the count of wet days per week, days with rainfall >100 mm per week, minimum temperature, average temperature and average humidity. Then we looked for correlations between leptospirosis incidence and those weather parameters by performing the wavelet analysis. Results: Our wavelet analysis results show peaks of wet days per week, days with rainfall >100 mm per week, minimum temperature, average temperature and average humidity respectively after 2, 3, 13, 20 and 1 week lags were followed by peaks of leptospirosis incidence. Nadirs (troughs) of rainfall after a week were followed by nadirs of leptospirosis incidence. Conclusions: All weather parameters studied are correlated with local leptospirosis incidence and the climate in Kandy is conducive for leptospirosis transmission. Leptospirosis incidence in the Kandy district is high compared to the national and global incidence. Therefore, leptospirosis preventive work in Kandy deserves more attention, especially during months with favorable weather for leptospirosis transmission. Video abstract Read the transcript Watch the video on Vimeo.
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Affiliation(s)
- N D B Ehelepola
- a Department of Medicine , Teaching (General) Hospital - Kandy , Kandy , Sri Lanka
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30
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Gómez-Mariscal M, De Arriba F, Revenga M, González-López JJ. Do Season and Environment Have a Role in the Incidence of Anterior Uveitis Attacks? Ocul Immunol Inflamm 2019; 28:786-790. [PMID: 31418617 DOI: 10.1080/09273948.2019.1636092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
PURPOSE To investigate the seasonal influence on the incidence of uveitis attacks. METHODS An ecological study was designed including 731 uveitis attacks in 594 patients diagnosed at the eye emergency of a hospital in Madrid between 2014 and 2017. The incidence of uveitis attacks, B27+, and presumed herpetic attacks were calculated, and their correlations with seasonal and environmental variables in the same timeframe were analyzed. The analyzed variables were precipitation, barometric pressure, temperature, humidity, wind speed, global solar radiation, ultraviolet radiation, air pollution components (particulate matter and polluting gases), and the incidence of influenza. RESULTS The incidence of attacks was significantly higher in the winter than in the autumn (p = .025). It showed a significant correlation to the number of rainy days per month (r = 0.612;p = .04), and the average wind speed (r = 0.469;p = .02) after Bonferroni correction. CONCLUSION Uveitis episodes happened more frequently under rainy and windy conditions. Most factors were not significantly correlated to attacks.
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Affiliation(s)
- M Gómez-Mariscal
- Ramón y Cajal University Hospital, Universidad de Alcalá , Madrid, Spain
| | - F De Arriba
- Ramón y Cajal University Hospital, Universidad de Alcalá , Madrid, Spain
| | - M Revenga
- Ramón y Cajal University Hospital, Universidad de Alcalá , Madrid, Spain
| | - J J González-López
- Ramón y Cajal University Hospital, Universidad de Alcalá , Madrid, Spain
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31
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Tian LL, Zhu B, Wang T, Zhao Y, Dong HW, Ren GQ, Hu L. [Nitrous Oxide Emissions and Its Influencing Factors from an Agricultural Headwater Ditch During a Maize Season in the Hilly Area of Central Sichuan Basin]. Huan Jing Ke Xue 2018; 38:2074-2083. [PMID: 29965116 DOI: 10.13227/j.hjkx.201611163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Agricultural headwater ditches, the important locations for retaining and transforming nitrogen derived from the adjacent farmlands, have been regarded as the potential source of nitrous oxide (N2O) emission. In this study, N2O emissions from a typical agricultural ditch in the Hilly Area of Central Sichuan Basin, were observed by closed static chamber-GC technique during the maize season (rainy season), from June to the end of September. During the study period, cumulative N2O emissions in the sediment-water interface without vegetation (NV) and the ditch ecosystem with natural vegetation (V) were 0.07 and 0.43 kg·hm-2, respectively. Meanwhile, the mean N2O flux from the agricultural headwater ditch ecosystem[14.7 μg·(m2·h)-1] was comparable to the magnitude of direct N2O flux from the maize cropland in this region. Nitrate concentration in the overlying water could be the main factor governing N2O emission from the ditch, especially in the rainy season. The existence of vegetation increased the indirect N2O emission factor (V:0.05% vs.NV:0.01%). The indirect N2O emission factor from this field investigation was much lower than the default value proposed by the Intergovernmental Panel on Climate Change (IPCC, 2006) for assessing indirect agricultural N2O emissions. More attention should be paid to in situ measurements to reduce uncertainty of N2O estimation calculated by only applying the default value for emission factor from the IPCC.
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Affiliation(s)
- Lin-Lin Tian
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Zhu
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China
| | - Tao Wang
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China
| | - Yuan Zhao
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong-Wei Dong
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China
| | - Guang-Qian Ren
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China
| | - Lei Hu
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.,Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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Skofronick-Jackson G, Kirschbaum D, Petersen W, Huffman G, Kidd C, Stocker E, Kakar R. The Global Precipitation Measurement (GPM) mission's scientific achievements and societal contributions: reviewing four years of advanced rain and snow observations. Q J R Meteorol Soc 2018; 144:27-48. [PMID: 31213729 PMCID: PMC6581458 DOI: 10.1002/qj.3313] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 04/09/2018] [Indexed: 05/28/2023]
Abstract
Precipitation represents a life-critical energy and hydrologic exchange between the Earth's atmosphere and its surface. As such, knowledge of where, when, and how much rain and snow falls is essential for scientific research and societal applications. Building on the 17-year success of the Tropical Rainfall Measurement Mission (TRMM), the Global Precipitation Measurement (GPM) Core Observatory (GPM-CO) is the first U.S. National Aeronautical and Space Administration (NASA) satellite mission specifically designed with sensors to observe the structure and intensities of both rain and falling snow. The GPM-CO has proved to be a worthy successor to TRMM, extending and improving high-quality active and passive microwave observations across all times of day. The GPM-CO launched in early 2014, is a joint mission between NASA and the Japanese Aerospace Exploration Agency (JAXA), with sensors that include the NASA-provided GPM Microwave Imager and the JAXA-provided Dual-frequency Precipitation Radar. These sensors were devised with high accuracy standards enabling them to be used as a reference for inter-calibrating a constellation of partner satellite data. These intercalibrated partner satellite retrievals are used with infrared data to produce merged precipitation estimates at temporal scales of 30 minutes and spatial scales of 0.1° × 0.1°. Precipitation estimates from the GPM-CO and partner constellation satellites, provided in near real time and later reprocessed with all ancillary data, are an indispensable source of precipitation data for operational and scientific users. Advances have been made using GPM data, primarily in improving sensor calibration, retrieval algorithms, and ground validation measurements, and used to further our understanding of the characteristics of liquid and frozen precipitation and the science of water and hydrological cycles for climate/weather forecasting. These advances have extended to societal benefits related to water resources, operational numerical weather prediction, hurricane monitoring, prediction, and disaster response, extremes, and disease.
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Affiliation(s)
| | | | - Walter Petersen
- ST11, NASA Marshall Space Flight Center, Earth Sciences Office, National Space and Technology Center, Huntsville, AL
| | - George Huffman
- Code 612.0, NASA Goddard Space Flight Center, Greenbelt, MD
| | - Chris Kidd
- Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD
- Code 612.0, NASA Goddard Space Flight Center, Greenbelt, MD
| | - Erich Stocker
- Code 612.0, NASA Goddard Space Flight Center, Greenbelt, MD
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Baar Y, Friedman ALL, Meiri S, Scharf I. Little effect of climate change on body size of herbivorous beetles. Insect Sci 2018; 25:309-316. [PMID: 28028893 DOI: 10.1111/1744-7917.12420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 10/08/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
Ongoing climate change affects various aspects of an animal's life, with important effects on distribution range and phenology. The relationship between global warming and body size changes in mammals and birds has been widely studied, with most findings indicating a decline in body size over time. Nevertheless, little data exist on similar size change patterns of invertebrates in general and insects in particular, and it is unclear whether insects should decrease in size or not with climate warming. We measured over 4000 beetle specimens, belonging to 29 beetle species in 8 families, collected in Israel during the last 100 years. The sampled species are all herbivorous. We examined whether beetle body size had changed over the years, while also investigating the relationships between body size and annual temperature, precipitation, net primary productivity (NPP) at the collection site and collection month. None of the environmental variables, including the collection year, was correlated with the size of most of the studied beetle species, while there were strong interactions of all variables with species. Our results, though mostly negative, suggest that the effect of climate change on insect body size is species-specific and by no means a general macro-ecological rule. They also suggest that the intrapopulation variance in body size of insects collected as adults in the field is large enough to conceal intersite environmental effects on body size, such as the effect of temperature and NPP.
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Affiliation(s)
- Yuval Baar
- Department of Zoology, Faculty of Life Sciences & Steinhardt Museum of Natural History and National Research Center, Tel Aviv University, Tel Aviv, Israel
| | - Ariel Leib Leonid Friedman
- Department of Zoology, Faculty of Life Sciences & Steinhardt Museum of Natural History and National Research Center, Tel Aviv University, Tel Aviv, Israel
| | - Shai Meiri
- Department of Zoology, Faculty of Life Sciences & Steinhardt Museum of Natural History and National Research Center, Tel Aviv University, Tel Aviv, Israel
| | - Inon Scharf
- Department of Zoology, Faculty of Life Sciences & Steinhardt Museum of Natural History and National Research Center, Tel Aviv University, Tel Aviv, Israel
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Sassoni E, D'Amen E, Roveri N, Scherer GW, Franzoni E. Durable Self-Cleaning Coatings for Architectural Surfaces by Incorporation of TiO₂ Nano-Particles into Hydroxyapatite Films. Materials (Basel) 2018; 11:ma11020177. [PMID: 29360789 PMCID: PMC5848874 DOI: 10.3390/ma11020177] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/11/2018] [Accepted: 01/19/2018] [Indexed: 11/26/2022]
Abstract
To prevent soiling of marble exposed outdoors, the use of TiO2 nano-particles has been proposed in the literature by two main routes, both raising durability issues: (i) direct application to marble surface, with the risk of particle leaching by rainfall; (ii) particle incorporation into inorganic or organic coatings, with the risk of organic coating degradation catalyzed by TiO2 photoactivity. Here, we investigated the combination of nano-TiO2 and hydroxyapatite (HAP), previously developed for marble protection against dissolution in rain and mechanical consolidation. HAP-TiO2 combination was investigated by two routes: (i) sequential application of HAP followed by nano-TiO2 (“H+T”); (ii) simultaneous application by introducing nano-TiO2 into the phosphate solution used to form HAP (“HT”). The self-cleaning ability was evaluated before and after prolonged exposure to simulated rain. “H+T” and “HT” coatings exhibited much better resistance to nano-TiO2 leaching by rain, compared to TiO2 alone. In “H+T” samples, TiO2 nano-particles adhere better to HAP (having flower-like morphology and high specific surface area) than to marble. In “HT” samples, thanks to chemical bonds between nano-TiO2 and HAP, the particles are firmly incorporated in the HAP coating, which protects them from leaching by rain, without diminishing their photoactivity and without being degraded by them.
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Affiliation(s)
- Enrico Sassoni
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy.
| | - Eros D'Amen
- Chemical Center S.r.l., Via S. Donato 5, 40057 Granarolo dell'Emilia (BO), Italy.
| | - Norberto Roveri
- Chemical Center S.r.l., Via S. Donato 5, 40057 Granarolo dell'Emilia (BO), Italy.
| | - George W Scherer
- Department of Civil and Environmental Engineering (CEE), Princeton University, 69 Olden Street, Princeton, NJ 08540, USA.
| | - Elisa Franzoni
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy.
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Ortega-Jimenez VM, Badger M, Wang H, Dudley R. Into rude air: hummingbird flight performance in variable aerial environments. Philos Trans R Soc Lond B Biol Sci 2017; 371:rstb.2015.0387. [PMID: 27528777 DOI: 10.1098/rstb.2015.0387] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2016] [Indexed: 11/12/2022] Open
Abstract
Hummingbirds are well known for their ability to sustain hovering flight, but many other remarkable features of manoeuvrability characterize the more than 330 species of trochilid. Most research on hummingbird flight has been focused on either forward flight or hovering in otherwise non-perturbed air. In nature, however, hummingbirds fly through and must compensate for substantial environmental perturbation, including heavy rain, unpredictable updraughts and turbulent eddies. Here, we review recent studies on hummingbirds flying within challenging aerial environments, and discuss both the direct and indirect effects of unsteady environmental flows such as rain and von Kármán vortex streets. Both perturbation intensity and the spatio-temporal scale of disturbance (expressed with respect to characteristic body size) will influence mechanical responses of volant taxa. Most features of hummingbird manoeuvrability remain undescribed, as do evolutionary patterns of flight-related adaptation within the lineage. Trochilid flight performance under natural conditions far exceeds that of microair vehicles at similar scales, and the group as a whole presents many research opportunities for understanding aerial manoeuvrability.This article is part of the themed issue 'Moving in a moving medium: new perspectives on flight'.
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Affiliation(s)
| | - M Badger
- Integrative Biology, University of California, Berkeley, CA, USA
| | - H Wang
- College of Astronautics, Nanjing University of Aeronautics and Astronautics, People's Republic of China
| | - R Dudley
- Integrative Biology, University of California, Berkeley, CA, USA Smithsonian Tropical Research Institute, Balboa, Panama
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Arnold BF, Schiff KC, Ercumen A, Benjamin-Chung J, Steele JA, Griffith JF, Steinberg SJ, Smith P, McGee CD, Wilson R, Nelsen C, Weisberg SB, Colford JM. Acute Illness Among Surfers After Exposure to Seawater in Dry- and Wet-Weather Conditions. Am J Epidemiol 2017; 186:866-875. [PMID: 28498895 PMCID: PMC5860265 DOI: 10.1093/aje/kwx019] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 01/23/2017] [Indexed: 11/17/2022] Open
Abstract
Rainstorms increase levels of fecal indicator bacteria in urban coastal waters, but it is unknown whether exposure to seawater after rainstorms increases rates of acute illness. Our objective was to provide the first estimates of rates of acute illness after seawater exposure during both dry- and wet-weather periods and to determine the relationship between levels of indicator bacteria and illness among surfers, a population with a high potential for exposure after rain. We enrolled 654 surfers in San Diego, California, and followed them longitudinally during the 2013–2014 and 2014–2015 winters (33,377 days of observation, 10,081 surf sessions). We measured daily surf activities and illness symptoms (gastrointestinal illness, sinus infections, ear infections, infected wounds). Compared with no exposure, exposure to seawater during dry weather increased incidence rates of all outcomes (e.g., for earache or infection, adjusted incidence rate ratio (IRR) = 1.86, 95% confidence interval (CI): 1.27, 2.71; for infected wounds, IRR = 3.04, 95% CI: 1.54, 5.98); exposure during wet weather further increased rates (e.g., for earache or infection, IRR = 3.28, 95% CI: 1.95, 5.51; for infected wounds, IRR = 4.96, 95% CI: 2.18, 11.29). Fecal indicator bacteria measured in seawater (Enterococcus species, fecal coliforms, total coliforms) were strongly associated with incident illness only during wet weather. Urban coastal seawater exposure increases the incidence rates of many acute illnesses among surfers, with higher incidence rates after rainstorms.
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Affiliation(s)
- Benjamin F. Arnold
- Correspondence to Dr. Benjamin F. Arnold, Division of Epidemiology, School of Public Health, University of California, Berkeley, 101 Haviland Hall, MC #7358, Berkeley, CA 94720-7358 (e-mail: )
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Deguines N, Brashares JS, Prugh LR. Precipitation alters interactions in a grassland ecological community. J Anim Ecol 2017; 86:262-272. [PMID: 27889916 DOI: 10.1111/1365-2656.12614] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 11/07/2016] [Indexed: 11/28/2022]
Abstract
Climate change is transforming precipitation regimes world-wide. Changes in precipitation regimes are known to have powerful effects on plant productivity, but the consequences of these shifts for the dynamics of ecological communities are poorly understood. This knowledge gap hinders our ability to anticipate and mitigate the impacts of climate change on biodiversity. Precipitation may affect fauna through direct effects on physiology, behaviour or demography, through plant-mediated indirect effects, or by modifying interactions among species. In this paper, we examined the response of a semi-arid ecological community to a fivefold change in precipitation over 7 years. We examined the effects of precipitation on the dynamics of a grassland ecosystem in central California from 2007 to 2013. We conducted vegetation surveys, pitfall trapping of invertebrates, visual surveys of lizards and capture-mark-recapture surveys of rodents on 30 plots each year. We used structural equation modelling to evaluate the direct, indirect and modifying effects of precipitation on plants, ants, beetles, orthopterans, kangaroo rats, ground squirrels and lizards. We found pervasive effects of precipitation on the ecological community. Although precipitation increased plant biomass, direct effects on fauna were often stronger than plant-mediated effects. In addition, precipitation altered the sign or strength of consumer-resource and facilitative interactions among the faunal community such that negative or neutral interactions became positive or vice versa with increasing precipitation. These findings indicate that precipitation influences ecological communities in multiple ways beyond its recognized effects on primary productivity. Stochastic variation in precipitation may weaken the average strength of biotic interactions over time, thereby increasing ecosystem stability and resilience to climate change.
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Affiliation(s)
- Nicolas Deguines
- School of Environmental and Forest Sciences, University of Washington, Winkenwerder Hall, W Stevens Way NE, Seattle, WA, 98195, USA.,Department of Environmental Science, Policy, and Management, University of California Berkeley, Mulford Hall, Hilgard Way, Berkeley, CA, 94720, USA
| | - Justin S Brashares
- Department of Environmental Science, Policy, and Management, University of California Berkeley, Mulford Hall, Hilgard Way, Berkeley, CA, 94720, USA
| | - Laura R Prugh
- School of Environmental and Forest Sciences, University of Washington, Winkenwerder Hall, W Stevens Way NE, Seattle, WA, 98195, USA
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Mihoub I, Ghashghaie J, Badeck FW, Robert T, Lamothe-Sibold M, Aid F. Intraspecific variability of carbon isotope discrimination and its correlation with g rain yield in safflower: prospects for selection in a Mediterranean climate. Isotopes Environ Health Stud 2016; 52:577-591. [PMID: 26982084 DOI: 10.1080/10256016.2016.1142988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 11/05/2015] [Indexed: 06/05/2023]
Abstract
The goals of the present study were to obtain a first estimate of intraspecific variability of carbon isotope discrimination (Δ) in safflower, a thistle-like herbaceous plant, and to determine the statistical relationship between Δ and grain yield as well as its components in a collection of 45 accessions of different origins. Grain yield and aboveground biomass, harvest index, average grain weight, and Δ (measured on the bulk leaf organic matter) were investigated in experimental field conditions. A large variability was noted for all traits but a principal component analysis (PCA) allowed to identify several homogeneous groups of accessions. Average grain yield per plant varied between 1 and 39 g. Δ varied between 21.3 and 25.2 ‰, i.e. a large variation of 3.9 ‰. In our experiment, the variation of Δ was not significantly related to that of grain yield in the whole accession sample. However, we found contrasting trends for this relation within accession groups. These initial results motivate further experiments to assess more in depth correlation between Δ and yield in safflower and are encouraging regarding the possibility of using Δ as an effective selection index in safflower to obtain genotypes that efficiently consume water. This study also highlighted one accession that combines the two characters required in the Mediterranean regions, i.e. high yield performance and high water-use efficiency.
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Affiliation(s)
- Imane Mihoub
- a Laboratoire de Biologie et Physiologie des Organismes (LBPO) , Université des Sciences et de la Technologie Houari-Boumediene (USTHB) , Bab Ezzouar, Alger , Algeria
| | - Jaleh Ghashghaie
- b Ecologie Systématique Evolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay , Orsay , France
| | - Franz W Badeck
- c CREA-GPG, Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA), Genomics Research Centre (GPG) , Fiorenzuola d'Arda , Italy
| | - Thierry Robert
- b Ecologie Systématique Evolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay , Orsay , France
| | - Marlène Lamothe-Sibold
- d Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Sorbonne Paris-Cite , Orsay , France
- e Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Orsay, France
| | - Fatiha Aid
- a Laboratoire de Biologie et Physiologie des Organismes (LBPO) , Université des Sciences et de la Technologie Houari-Boumediene (USTHB) , Bab Ezzouar, Alger , Algeria
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Gingras AR, Puzon-McLaughlin W, Bobkov AA, Ginsberg MH. Structural Basis of Dimeric Rasip1 RA Domain Recognition of the Ras Subfamily of GTP-Binding Proteins. Structure 2016; 24:2152-62. [PMID: 27839947 DOI: 10.1016/j.str.2016.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/04/2016] [Accepted: 10/12/2016] [Indexed: 01/20/2023]
Abstract
Ras-interacting protein 1 (Rasip1) is an endothelial-specific Rap1 and Ras effector, important for vascular development and angiogenesis. Here, we report the crystal structure of the Rasip1 RA domain (RRA) alone, revealing the basis of dimerization, and in complex with Rap1 at 2.8 Å resolution. In contrast to most RA domains, RRA formed a dimer that can bind two Rap1 (KD = 0.9 μM) or Ras (KD = 2.2 μM) molecules. We solved the Rap1-RRA complex and found that Rasip1 binds Rap1 in the Switch I region, and Rap1 binding induces few conformation changes to Rasip1 stabilizing a β strand and an unstructured loop. Our data explain how Rasip1 can act as a Rap1 and Ras effector and show that Rasip1 defines a subgroup of dimeric RA domains that could mediate cooperative binding to membrane-associated Ras superfamily members.
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Altieri KE, Fawcett SE, Peters AJ, Sigman DM, Hastings MG. Marine biogenic source of atmospheric organic nitrogen in the subtropical North Atlantic. Proc Natl Acad Sci U S A 2016; 113:925-30. [PMID: 26739561 DOI: 10.1073/pnas.1516847113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Global models estimate that the anthropogenic component of atmospheric nitrogen (N) deposition to the ocean accounts for up to a third of the ocean's external N supply and 10% of anthropogenic CO2 uptake. However, there are few observational constraints from the marine atmospheric environment to validate these findings. Due to the paucity of atmospheric organic N data, the largest uncertainties related to atmospheric N deposition are the sources and cycling of organic N, which is 20-80% of total N deposition. We studied the concentration and chemical composition of rainwater and aerosol organic N collected on the island of Bermuda in the western North Atlantic Ocean over 18 mo. Here, we show that the water-soluble organic N concentration ([WSON]) in marine aerosol is strongly correlated with surface ocean primary productivity and wind speed, suggesting a marine biogenic source for aerosol WSON. The chemical composition of high-[WSON] aerosols also indicates a primary marine source. We find that the WSON in marine rain is compositionally different from that in concurrently collected aerosols, suggesting that in-cloud scavenging (as opposed to below-cloud "washout") is the main contributor to rain WSON. We conclude that anthropogenic activity is not a significant source of organic N to the marine atmosphere over the North Atlantic, despite downwind transport from large pollution sources in North America. This, in conjunction with previous work on ammonium and nitrate, leads to the conclusion that only 27% of total N deposition to the global ocean is anthropogenic, in contrast to the 80% estimated previously.
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Paola B, Marco CL. OTA-Grapes: A Mechanistic Model to Predict Ochratoxin A Risk in Grapes, a Step beyond the Systems Approach. Toxins (Basel) 2015; 7:3012-29. [PMID: 26258791 DOI: 10.3390/toxins7083012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 12/21/2022] Open
Abstract
Ochratoxin A (OTA) is a fungal metabolite dangerous for human and animal health due to its nephrotoxic, immunotoxic, mutagenic, teratogenic and carcinogenic effects, classified by the International Agency for Research on Cancer in group 2B, possible human carcinogen. This toxin has been stated as a wine contaminant since 1996. The aim of this study was to develop a conceptual model for the dynamic simulation of the A. carbonarius life cycle in grapes along the growing season, including OTA production in berries. Functions describing the role of weather parameters in each step of the infection cycle were developed and organized in a prototype model called OTA-grapes. Modelling the influence of temperature on OTA production, it emerged that fungal strains can be shared in two different clusters, based on the dynamic of OTA production and according to the optimal temperature. Therefore, two functions were developed, and based on statistical data analysis, it was assumed that the two types of strains contribute equally to the population. Model validation was not possible because of poor OTA contamination data, but relevant differences in OTA-I, the output index of the model, were noticed between low and high risk areas. To our knowledge, this is the first attempt to assess/model A. carbonarius in order to predict the risk of OTA contamination in grapes.
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Sohn K. The influence of birth season on height: Evidence from Indonesia. Am J Phys Anthropol 2015; 157:659-65. [PMID: 26059892 DOI: 10.1002/ajpa.22763] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/01/2015] [Accepted: 04/26/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Literature on the effect of birth month on height has generally considered regions in temperate climates. However, because many climatic conditions there change with seasons, it is difficult to isolate potential causes. This study estimated the effect of birth month and season on terminal height by analyzing the population of a country with only a few factors driving its climate. MATERIALS AND METHODS The sample was derived from nationally representative data of the Indonesian population. We considered 9,262 men and 10,314 women 20-50 years of age. We applied cosinor analysis to a time series of height by birth month. We then applied a more flexible approach by regressing height on a series of dummy variables for birth month (and, subsequently, season) and birth year fixed effects by sex. RESULTS There was no statistically significant difference in height by birth month. However, although weakly significant, men born in the dry season (June-September) were 2.3 mm shorter than those born in the wet season (the remaining months). The corresponding figure for women was 2.6 mm, a statistically significant difference. DISCUSSION We eliminated some potential factors previously suggested in the literature, including insolation, the position of our planet with respect to the sun, food availability, and maternal workload. We speculate that babies born in the dry season were affected in the third trimester by the high disease burden that characterizes the wet season.
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Affiliation(s)
- Kitae Sohn
- Department of Economics, Konkuk University, Gwangjin-Gu, Seoul, 143-701, South Korea
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Abstract
Outdoor exercise often proceeds in rainy conditions. However, the cooling effects of rain on human physiological responses have not been systematically studied in hot conditions. The present study determined physiological and metabolic responses using a climatic chamber that can precisely simulate hot, rainy conditions. Eleven healthy men ran on a treadmill at an intensity of 70% VO2max for 30 min in the climatic chamber at an ambient temperature of 33°C in the presence (RAIN) or absence (CON) of 30 mm · h(-1) of precipitation and a headwind equal to the running velocity of 3.15 ± 0.19 m · s(-1). Oesophageal temperature, mean skin temperature, heart rate, rating of perceived exertion, blood parameters, volume of expired air and sweat loss were measured. Oesophageal and mean skin temperatures were significantly lower from 5 to 30 min, and heart rate was significantly lower from 20 to 30 min in RAIN than in CON (P < 0.05 for all). Plasma lactate and epinephrine concentrations (30 min) and sweat loss were significantly lower (P < 0.05) in RAIN compared with CON. Rain appears to influence physiological and metabolic responses to exercise in heat such that heat-induced strain might be reduced.
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Affiliation(s)
- Ryo Ito
- a University Educational Center, Nihon Fukushi University , Mihama-cho , Japan
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Silverberg JI, Braunstein M, Lee-Wong M. Association between climate factors, pollen counts, and childhood hay fever prevalence in the United States. J Allergy Clin Immunol 2014; 135:463-9. [PMID: 25304658 DOI: 10.1016/j.jaci.2014.08.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 07/16/2014] [Accepted: 08/06/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Climate factors and pollen counts may play a role in hay fever. OBJECTIVE We sought to determine the impact of specific climate factors and pollen counts on the US prevalence of hay fever and statewide variation in prevalence. METHODS We used a merged analysis of the 2007 National Survey of Children's Health from a representative sample of 91,642 children aged 0 to 17 years and the 2006-2007 National Climate Data Center and Weather Service measurements of relative humidity (%), indoor heating degree days, precipitation, Palmer Hydrological Drought Index, clear sky and issued ultraviolet indices, stratospheric ozone levels, and outdoor air temperature and National Allergy Bureau total pollen counts. Multivariate survey logistic regression models controlled for sex, race/ethnicity, age, household income, and birthplace. RESULTS The US prevalence of hay fever in childhood was 18.0% (95% CI, 17.7% to 18.2%), with the highest prevalence in southeastern and southern states. Hay fever prevalence was significantly lower with second and third quartile mean annual relative humidity (logistic regression, P ≤ .01 for both), fourth quartile mean annual Palmer Hydrological Drought Index (P = .02), third and fourth quartile mean annual heating degree days (P < .0001 for both), and third and fourth quartile mean annual stratospheric ozone levels but increased with second, third, and fourth quartile mean annual temperature (P ≤ .02 for both), fourth quartile mean annual precipitation (P = .0007), mean total pollen counts (P = .01), and second, third, and fourth quartile issued ultraviolet index (P ≤ .0001 for all). Principal-component analysis was also used to determine the combined effects of correlated climate variables and pollen counts. CONCLUSIONS This study provides evidence of the influence of climate on the US prevalence of childhood hay fever.
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Affiliation(s)
- Jonathan I Silverberg
- Departments of Dermatology, Preventive Medicine, and Medical Social Sciences, Northwestern University, Chicago, Ill; Department of Dermatology, Beth Israel Medical Center and St Luke's-Roosevelt Hospital Center, New York, NY.
| | - Marc Braunstein
- Department of Pediatrics, State University of New York Downstate Medical Center, Brooklyn, NY
| | - Mary Lee-Wong
- Mount Sinai Beth Israel Medical Center, New York, NY
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Carlton EJ, Eisenberg JNS, Goldstick J, Cevallos W, Trostle J, Levy K. Heavy rainfall events and diarrhea incidence: the role of social and environmental factors. Am J Epidemiol 2014; 179:344-52. [PMID: 24256618 DOI: 10.1093/aje/kwt279] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The impact of heavy rainfall events on waterborne diarrheal diseases is uncertain. We conducted weekly, active surveillance for diarrhea in 19 villages in Ecuador from February 2004 to April 2007 in order to evaluate whether biophysical and social factors modify vulnerability to heavy rainfall events. A heavy rainfall event was defined as 24-hour rainfall exceeding the 90th percentile value (56 mm) in a given 7-day period within the study period. Mixed-effects Poisson regression was used to test the hypothesis that rainfall in the prior 8 weeks, water and sanitation conditions, and social cohesion modified the relationship between heavy rainfall events and diarrhea incidence. Heavy rainfall events were associated with increased diarrhea incidence following dry periods (incidence rate ratio = 1.39, 95% confidence interval: 1.03, 1.87) and decreased diarrhea incidence following wet periods (incidence rate ratio = 0.74, 95% confidence interval: 0.59, 0.92). Drinking water treatment reduced the deleterious impacts of heavy rainfall events following dry periods. Sanitation, hygiene, and social cohesion did not modify the relationship between heavy rainfall events and diarrhea. Heavy rainfall events appear to affect diarrhea incidence through contamination of drinking water, and they present the greatest health risks following periods of low rainfall. Interventions designed to increase drinking water treatment may reduce climate vulnerability.
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Semenza JC, Herbst S, Rechenburg A, Suk JE, Höser C, Schreiber C, Kistemann T. Climate Change Impact Assessment of Food- and Waterborne Diseases. Crit Rev Environ Sci Technol 2012; 42:857-890. [PMID: 24808720 PMCID: PMC3996521 DOI: 10.1080/10643389.2010.534706] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The PubMed and ScienceDirect bibliographic databases were searched for the period of 1998-2009 to evaluate the impact of climatic and environmental determinants on food- and waterborne diseases. The authors assessed 1,642 short and concise sentences (key facts), which were extracted from 722 relevant articles and stored in a climate change knowledge base. Key facts pertaining to temperature, precipitation, water, and food for 6 selected pathogens were scrutinized, evaluated, and compiled according to exposure pathways. These key facts (corresponding to approximately 50,000 words) were mapped to 275 terminology terms identified in the literature, which generated 6,341 connections. These relationships were plotted on semantic network maps to examine the interconnections between variables. The risk of campylobacteriosis is associated with mean weekly temperatures, although this link is shown more strongly in the literature relating to salmonellosis. Irregular and severe rain events are associated with Cryptosporidium sp. outbreaks, while noncholera Vibrio sp. displays increased growth rates in coastal waters during hot summers. In contrast, for Norovirus and Listeria sp. the association with climatic variables was relatively weak, but much stronger for food determinants. Electronic data mining to assess the impact of climate change on food- and waterborne diseases assured a methodical appraisal of the field. This climate change knowledge base can support national climate change vulnerability, impact, and adaptation assessments and facilitate the management of future threats from infectious diseases. In the light of diminishing resources for public health this approach can help balance different climate change adaptation options.
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Affiliation(s)
- Jan C. Semenza
- Future Threats and Determinants Section, Scientific Advice Unit, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Susanne Herbst
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Andrea Rechenburg
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Jonathan E. Suk
- Future Threats and Determinants Section, Scientific Advice Unit, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Christoph Höser
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Christiane Schreiber
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Thomas Kistemann
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
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Tin Tin S, Woodward A, Robinson E, Ameratunga S. Temporal, seasonal and weather effects on cycle volume: an ecological study. Environ Health 2012; 11:12. [PMID: 22401535 PMCID: PMC3368741 DOI: 10.1186/1476-069x-11-12] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 03/08/2012] [Indexed: 05/13/2023]
Abstract
BACKGROUND Cycling has the potential to provide health, environmental and economic benefits but the level of cycling is very low in New Zealand and many other countries. Adverse weather is often cited as a reason why people do not cycle. This study investigated temporal and seasonal variability in cycle volume and its association with weather in Auckland, New Zealand's largest city. METHODS Two datasets were used: automated cycle count data collected on Tamaki Drive in Auckland by using ZELT Inductive Loop Eco-counters and weather data (gust speed, rain, temperature, sunshine duration) available online from the National Climate Database. Analyses were undertaken using data collected over one year (1 January to 31 December 2009). Normalised cycle volumes were used in correlation and regression analyses to accommodate differences by hour of the day and day of the week and holiday. RESULTS In 2009, 220,043 bicycles were recorded at the site. There were significant differences in mean hourly cycle volumes by hour of the day, day type and month of the year (p < 0.0001). All weather variables significantly influenced hourly and daily cycle volumes (p < 0.0001). The cycle volume increased by 3.2% (hourly) and 2.6% (daily) for 1°C increase in temperature but decreased by 10.6% (hourly) and 1.5% (daily) for 1 mm increase in rainfall and by 1.4% (hourly) and 0.9% (daily) for 1 km/h increase in gust speed. The volume was 26.2% higher in an hour with sunshine compared with no sunshine, and increased by 2.5% for one hour increase in sunshine each day. CONCLUSIONS There are temporal and seasonal variations in cycle volume in Auckland and weather significantly influences hour-to-hour and day-to-day variations in cycle volume. Our findings will help inform future cycling promotion activities in Auckland.
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Affiliation(s)
- Sandar Tin Tin
- Section of Epidemiology and Biostatistics, School of Population Health, University of Auckland, Auckland, New Zealand
| | - Alistair Woodward
- School of Population Health, University of Auckland, Auckland, New Zealand
| | - Elizabeth Robinson
- Section of Epidemiology and Biostatistics, School of Population Health, University of Auckland, Auckland, New Zealand
| | - Shanthi Ameratunga
- Section of Epidemiology and Biostatistics, School of Population Health, University of Auckland, Auckland, New Zealand
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Semenza JC, Höuser C, Herbst S, Rechenburg A, Suk JE, Frechen T, Kistemann T. Knowledge Mapping for Climate Change and Food- and Waterborne Diseases. Crit Rev Environ Sci Technol 2012; 42:378-411. [PMID: 24771989 PMCID: PMC3996524 DOI: 10.1080/10643389.2010.518520] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The authors extracted from the PubMed and ScienceDirect bibliographic databases all articles published between 1998 and 2009 that were relevant to climate change and food- and waterborne diseases. Any material within each article that provided information about a relevant pathogen and its relationship with climate and climate change was summarized as a key fact, entered into a relational knowledge base, and tagged with the terminology (predefined terms) used in the field. These terms were organized, quantified, and mapped according to predefined hierarchical categories. For noncholera Vibrio sp. and Cryptosporidium sp., data on climatic and environmental influences (52% and 49% of the total number of key facts, respectively) pertained to specific weather phenomena (as opposed to climate change phenomena) and environmental determinants, whereas information on the potential effects of food-related determinants that might be related to climate or climate change were virtually absent. This proportion was lower for the other pathogens studied (Campylobacter sp. 40%, Salmonella sp. 27%, Norovirus 25%, Listeria sp. 8%), but they all displayed a distinct concentration of information on general food-and water-related determinants or effects, albeit with little detail. Almost no information was available concerning the potential effects of changes in climatic variables on the pathogens evaluated, such as changes in air or water temperature, precipitation, humidity, UV radiation, wind, cloud coverage, sunshine hours, or seasonality. Frequency profiles revealed an abundance of data on weather and food-specific determinants, but also exposed extensive data deficiencies, particularly with regard to the potential effects of climate change on the pathogens evaluated. A reprioritization of public health research is warranted to ensure that funding is dedicated to explicitly studying the effects of changes in climate variables on food- and waterborne diseases.
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Affiliation(s)
- Jan C. Semenza
- Future Threats and Determinants Section, Scientific Advice Unit, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- Address correspondence to Jan, C. Semenza, Head of Future Threats and Determinants Section, Scientific Advice Unit, European Centre for Disease Prevention and Control (ECDC), Tomtebodavägen 11A, S-171 83 Stockholm, Sweden. E-mail:
| | - Christoph Höuser
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Susanne Herbst
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Andrea Rechenburg
- Future Threats and Determinants Section, Scientific Advice Unit, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Jonathan E. Suk
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Tobias Frechen
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
| | - Thomas Kistemann
- Institute for Hygiene and Public Health, Department of Medical Geography and Public Health, University of Bonn, Bonn, Germany
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Díaz JMG, Caamaño BH. [Seasonality of Schizophrenia: Findings of a Descriptive Study in Santa Marta, Colombia]. Rev Colomb Psiquiatr 2011; 40:660-669. [PMID: 38620213 PMCID: PMC7130935 DOI: 10.1016/s0034-7450(14)60156-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Accepted: 09/16/2011] [Indexed: 04/17/2024]
Abstract
Introduction Multiple studies carried out around the globe have concluded that there is a seasonal effect on the births of patients that will go on to develop schizophrenia later on. A relationship between being exposed to certain infectious agents during the prenatal period and possible direct effects on the developing brain that will later be expressed by the classical clinical picture has been suggested. Objective To analyze the behavior of births in a sample of individuals with schizophrenia from Santa Marta, Colombia. Methods Descriptive study based on the review of clinical histories of the patients seen in a psychiatric institute. Discussion A larger number of births took place during the rainiest months of the year suggesting a possible seasonal effect. However, the lack of data on births in Santa Marta during the years of the study did not allow a comparison between the results of the study and the birth rates of the general population. Even so, these findings have implications for future research regarding seasonality of schizophrenia in Colombia. They do not reflect an individual risk of developing the illness but they do document the characteristics of the temporal behavior of the births in the sample studied. Further studies that overcome the limitations of the present one are needed.
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Affiliation(s)
- Jairo M González Díaz
- Médico. Investigador, Grupo de Investigación en Psiquiatría de la Universidad del Magdalena, Santa Marta, Colombia
| | - Beatriz Helena Caamaño
- Médica psiquiatra. Jefe, Servicio de Salud Mental, Hospital Universitario Fernando Troconis, y del Departamento de Psiquiatría del Programa de Medicina de la Universidad del Magdalena, Santa Marta, Colombia
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Rydén P, Sjöstedt A, Johansson A. Effects of climate change on tularaemia disease activity in Sweden. Glob Health Action 2009; 2. [PMID: 20052432 PMCID: PMC2799307 DOI: 10.3402/gha.v2i0.2063] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/17/2009] [Accepted: 09/17/2009] [Indexed: 11/14/2022] Open
Abstract
Tularaemia is a vector-borne infectious disease. A large majority of cases transmitted to humans by blood-feeding arthropods occur during the summer season and is linked to increased temperatures. Therefore, the effect of climate change is likely to have an effect on tularaemia transmission patterns in highly endemic areas of Sweden. In this report, we use simulated climate change scenario data and empirical data of temperatures critical to tularaemia transmission to forecast tularaemia outbreak activity. The five high-endemic counties: Dalarna, Gävleborg, Norrbotten, Värmland and Örebro represent only 14.6% of the total population of Sweden, but have recorded 40.1–81.1% of the number of annual human tularaemia in Sweden from 1997 until 2008. We project here earlier starts and a later termination of future tularaemia outbreaks for the time period 2010–2100. For five localised outbreak areas; Gagnef (Dalarna), Ljusdal (Gävleborg), Harads (Norrbotten), Karlstad (Värmland) and Örebro municipality (Örebro), the climate scenario suggests an approximately 2°C increase in monthly average summer temperatures leading to increases in outbreak durations ranging from 3.5 weeks (Harads) to 6.6 weeks (Karlstad) between 2010 and 2100. In contrast, an analysis of precipitation scenarios indicates fairly stable projected levels of precipitation during the summer months. Thus, there should not be an increased abundance of late summer mosquitoes that are believed to be main vectors for transmission to humans in these areas. In conclusion, the results indicate that the future climate changes will lead to an increased burden of tularaemia in high-endemic areas of Sweden during the coming decades.
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Affiliation(s)
- Patrik Rydén
- Department of Mathematics and Mathematical Statistics, Umeå University, Umeå, Sweden
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