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https://www.readbyqxmd.com/read/29785519/threshold-dynamics-of-a-temperature-dependent-stage-structured-mosquito-population-model-with-nested-delays
#1
Xiunan Wang, Xingfu Zou
Mosquito-borne diseases remain a significant threat to public health and economics. Since mosquitoes are quite sensitive to temperature, global warming may not only worsen the disease transmission case in current endemic areas but also facilitate mosquito population together with pathogens to establish in new regions. Therefore, understanding mosquito population dynamics under the impact of temperature is considerably important for making disease control policies. In this paper, we develop a stage-structured mosquito population model in the environment of a temperature-controlled experiment...
May 21, 2018: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/29785516/increased-water-temperature-altered-hemato-biochemical-parameters-and-structure-of-peripheral-erythrocytes-in-striped-catfish-pangasianodon-hypophthalmus
#2
Md Shahjahan, Md Helal Uddin, Victor Bain, Md Mahfuzul Haque
The increase of water temperature due to global warming is a great concern of aquaculturists and fishery biologists. In the present study, we examined the effects of high temperature on hematological parameters and blood glucose levels in striped catfish, Pangasianodon hypophthalmus exposed to three temperature conditions (28, 32, and 36 °C) for 7 days. Fish were sacrificed at days 1, 3, and 7. Erythroblasts (Ebs), erythrocytic cellular abnormalities (ECA), and erythrocytic nuclear abnormalities (ENA) were assayed using peripheral erythrocytes of the sampled fishes...
May 21, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29785206/life-cycle-assessment-of-residual-lignocellulosic-biomass-based-jet-fuel-with-activated-carbon-and-lignosulfonate-as-co-products
#3
Francesca Pierobon, Ivan L Eastin, Indroneil Ganguly
Background: Bio-jet fuels are emerging as a valuable alternative to petroleum-based fuels for their potential for reducing greenhouse gas emissions and fossil fuel dependence. In this study, residual woody biomass from slash piles in the U.S. Pacific Northwest is used as a feedstock to produce iso-paraffinic kerosene, through the production of sugar and subsequent patented proprietary fermentation and upgrading. To enhance the economic viability and reduce the environmental impacts of iso-paraffinic kerosene, two co-products, activated carbon and lignosulfonate, are simultaneously produced within the same bio-refinery...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29784905/northward-shift-of-the-agricultural-climate-zone-under-21-st-century-global-climate-change
#4
Myron King, Daniel Altdorff, Pengfei Li, Lakshman Galagedara, Joseph Holden, Adrian Unc
As agricultural regions are threatened by climate change, warming of high latitude regions and increasing food demands may lead to northward expansion of global agriculture. While socio-economic demands and edaphic conditions may govern the expansion, climate is a key limiting factor. Extant literature on future crop projections considers established agricultural regions and is mainly temperature based. We employed growing degree days (GDD), as the physiological link between temperature and crop growth, to assess the global northward shift of agricultural climate zones under 21st -century climate change...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29783057/evaluation-of-water-relation-parameters-in-vitis-rootstocks-with-different-drought-tolerance-and-their-effects-on-growth-of-a-grafted-cultivar
#5
Gregorio Gullo, Antonio Dattola, Vincenzo Vonella, Rocco Zappia
Knowledge of root hydraulic resistance will allow us to better understand water relations arising in the soil-plant-atmosphere continuum. These are the basis for better control of plant behaviour in the current environmental context that is more and more affected by global warming and problems related to increased drought frequency and duration. The objectives of this study were to determine how the growth of a cultivar changes in response to the drought tolerance of the rootstock used in Vitis grown in a semi-arid area and how the root hydraulic resistivity and root hydraulic conductivity change with increased transpiration when adopting a rootstock with a different drought tolerance...
April 27, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29782797/low-temperature-synthesized-h-2-ti-3-o-7-nanotubes-with-a-high-co-2-adsorption-property-by-amine-modification
#6
Misaki Ota, Yuichiro Hirota, Yoshiaki Uchida, Yasuhiro Sakamoto, Norikazu Nishiyama
Carbon dioxide (CO2 ) capture and storage (CCS) technologies have been attracted attention in terms of tackling with global warming. To date, various CO2 capture technologies including solvents, membranes, cryogenics and solid adsorbents have been proposed. Currently, a liquid adsorption method for CO2 using amine solution (monoethanolamine) has been practically used. However, this liquid phase CO2 adsorption process requires heat regeneration, and it can cause many problems such as corrosion of equipment and degradation of the solution...
May 21, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29782525/impact-of-agronomy-practices-on-the-effects-of-reduced-tillage-systems-on-ch4-and-n2o-emissions-from-agricultural-fields-a-global-meta-analysis
#7
Jinfei Feng, Fengbo Li, Xiyue Zhou, Chunchun Xu, Long Ji, Zhongdu Chen, Fuping Fang
The effect of no- and reduced tillage (NT/RT) on greenhouse gas (GHG) emission was highly variable and may depend on other agronomy practices. However, how the other practices affect the effect of NT/RT on GHG emission remains elusive. Therefore, we conducted a global meta-analysis (including 49 papers with 196 comparisons) to assess the effect of five options (i.e. cropping system, crop residue management, split application of N fertilizer, irrigation, and tillage duration) on the effect of NT/RT on CH4 and N2O emissions from agricultural fields...
2018: PloS One
https://www.readbyqxmd.com/read/29780431/mathematical-modelling-of-bacterial-meningitis-transmission-dynamics-with-control-measures
#8
Joshua Kiddy K Asamoah, Farai Nyabadza, Baba Seidu, Mehar Chand, Hemen Dutta
Vaccination and treatment are the most effective ways of controlling the transmission of most infectious diseases. While vaccination helps susceptible individuals to build either a long-term immunity or short-term immunity, treatment reduces the number of disease-induced deaths and the number of infectious individuals in a community/nation. In this paper, a nonlinear deterministic model with time-dependent controls has been proposed to describe the dynamics of bacterial meningitis in a population. The model is shown to exhibit a unique globally asymptotically stable disease-free equilibrium ℰ 0 , when the effective reproduction number ℛ VT ≤ 1, and a globally asymptotically stable endemic equilibrium ℰ 1 , when ℛ VT > 1; and it exhibits a transcritical bifurcation at ℛ VT = 1...
2018: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/29780018/overview-of-zoonotic-diseases-in-turkey-the-one-health-concept-and-future-threats
#9
Abdullah İnci, Mehmet Doğanay, Aykut Özdarendeli, Önder Düzlü, Alparslan Yıldırım
Zoonotic infections are globally important diseases and lead to huge economic losses in both low- and middle-income and high-income countries. Global warming, environmental and ecological changes, illegal movement of animals and humans, regional civil wars, and poverty are predisposing factors for the emergence of zoonotic infections and their distribution worldwide; they are also a big threat for the future. In addition, environmental pollution and antimicrobial resistance are immense serious threats and dangers to prevent and control zoonotic infections...
March 2018: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29778686/methane-correction-factors-for-estimating-emissions-from-aerobic-wastewater-treatment-facilities-based-on-field-data-in-mexico-and-on-literature-review
#10
A Noyola, M G Paredes, L P Güereca, L T Molina, M Zavala
Wastewater treatment (WWT) may be an important source of methane (CH4 ), a greenhouse gas with significant global warming potential. Sources of CH4 emissions from WWT facilities can be found in the water and in the sludge process lines. Among the methodologies for estimating CH4 emissions inventories from WWT, the more adopted are the guidelines of the Intergovernmental Panel on Climate Change (IPCC), which recommends default emission factors (Tier 1) depending on WWT systems. Recent published results show that well managed treatment facilities may emit CH4 , due to dissolved CH4 in the influent wastewater; in addition, biological nutrient removal also will produce this gas in the anaerobic (or anoxic) steps...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29774975/signals-of-large-scale-climate-drivers-hatchery-enhancement-and-marine-factors-in-yukon-river-chinook-salmon-survival-revealed-with-a-bayesian-life-history-model
#11
Curry J Cunningham, Peter A H Westley, Milo D Adkison
Understanding how species might respond to climate change involves disentangling the influence of co-occurring environmental factors on population dynamics, and is especially problematic for migratory species like Pacific salmon that move between ecosystems. To date, debate surrounding the causes of recent declines in Yukon River Chinook salmon (Oncorhynchus tshawytscha) abundance has centered on whether factors in freshwater or marine environments control variation in survival, and how these populations at the northern extremity of the species range will respond to climate change...
May 18, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29773924/mercury-in-the-diatoms-of-various-ecological-formations
#12
Magdalena Bełdowska, Aleksandra Zgrundo, Justyna Kobos
Mercury is a neurotoxin, its main source in the human organism being fish and seafood. The first level in the marine food web is formed of planktonic and benthic photosynthetic microorganisms, which form a biofilm on the surface of the hard bottom (epilithon) or plants (epiphyton). They are carriers of nutritional as well as toxic substances and pass these on to subsequent levels of the trophic web. Their biomass is often dominated by diatoms. This was the basis for the presented study into Hg accumulation in epilithic, epiphytic and planktonic diatoms, which was carried out in 2012-2013 in the coastal zone of the Puck Lagoon and the Gulf of Gdańsk (southern Baltic)...
2018: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/29773751/the-projected-effect-on-insects-vertebrates-and-plants-of-limiting-global-warming-to-1-5%C3%A2-c-rather-than-2%C3%A2-c
#13
R Warren, J Price, E Graham, N Forstenhaeusler, J VanDerWal
In the Paris Agreement on Climate Change, the United Nations is pursuing efforts to limit global warming to 1.5°C, whereas earlier aspirations focused on a 2°C limit. With current pledges, corresponding to ~3.2°C warming, climatically determined geographic range losses of >50% are projected in ~49% of insects, 44% of plants, and 26% of vertebrates. At 2°C, this falls to 18% of insects, 16% of plants, and 8% of vertebrates and at 1.5°C, to 6% of insects, 8% of plants, and 4% of vertebrates. When warming is limited to 1...
May 18, 2018: Science
https://www.readbyqxmd.com/read/29772087/environmental-change-and-predator-diversity-drive-alpha-and-beta-diversity-in-freshwater-macro-and-microorganisms
#14
Pablo Augusto P Antiqueira, Owen L Petchey, Viviane Piccin Dos Santos, Valéria Maia de Oliveira, Gustavo Quevedo Romero
Global biodiversity is eroding due to anthropogenic causes such as climate change, habitat loss, and trophic simplification of biological communities. Most studies address only isolated causes within a single group of organisms; however, biological groups of different trophic levels may respond in particular ways to different environmental impacts. Our study used natural microcosms to investigate the predicted individual and interactive effects of warming, changes in top predator diversity, and habitat size on the alpha and beta diversity of macrofauna, microfauna and bacteria...
May 17, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29769562/common-drivers-of-seasonal-movements-on-the-migration-residency-behavior-continuum-in-a-large-herbivore
#15
Jodie Martin, Vincent Tolon, Nicolas Morellet, Hugues Santin-Janin, Alain Licoppe, Claude Fischer, Jérôme Bombois, Patrick Patthey, Elias Pesenti, Delphine Chenesseau, Sonia Saïd
This study aimed to (1) identify the scale of environmental drivers of seasonal movements on the migration - residency behavior continuum in a large herbivore species and to (2) test the hypothesis that the same environmental drivers and spatio-temporal scaling should influence spatial processes in both migrants (long distance migration) and residents (short distance range shifts). We performed a comparative analysis of the influence of plant phenology and snow cover duration on seasonal movements of five partially migrating red deer populations with contrasting environmental conditions, at the seasonal range scale and at the study area scale...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768693/coastal-ecosystems-on-a-tipping-point-global-warming-and-parasitism-combine-to-alter-community-structure-and-function
#16
Kim N Mouritsen, Mikkel M Sørensen, Robert Poulin, Brian L Fredensborg
Mounting evidence suggests that the transmission of certain parasites is facilitated by increasing temperatures, causing their host population to decline. However, no study has yet addressed how temperature and parasitism may combine to shape the functional structure of a whole host community in the face of global warming. Here, we apply an outdoor mesocosm approach supported by field surveys to elucidate this question in a diverse intertidal community of amphipods infected by the pathogenic microphallid trematode, Maritrema novaezealandensis...
May 16, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29768443/use-of-existing-hydrographic-infrastructure-to-forecast-the-environmental-spawning-conditions-for-eastern-baltic-cod
#17
Burkhard von Dewitz, Susanne Tamm, Katharina Höflich, Rüdiger Voss, Hans-Harald Hinrichsen
The semi-enclosed nature and estuarine characteristics, together with its strongly alternating bathymetry, make the Baltic Sea prone to much stronger interannual variations in the abiotic environment, than other spawning habitats of Atlantic cod (Gadus morhua). Processes determining salinity and oxygen conditions in the basins are influenced both by long term gradual climate change, e.g. global warming, but also by short-term meteorological variations and events. Specifically one main factor influencing cod spawning conditions, the advection of highly saline and well-oxygenated water masses from the North Sea, is observed in irregular frequencies and causes strong interannual variations in stock productivity...
2018: PloS One
https://www.readbyqxmd.com/read/29765634/noise-induced-transitions-and-shifts-in-a-climate-vegetation-feedback-model
#18
Dmitri V Alexandrov, Irina A Bashkirtseva, Lev B Ryashko
Motivated by the extremely important role of the Earth's vegetation dynamics in climate changes, we study the stochastic variability of a simple climate-vegetation system. In the case of deterministic dynamics, the system has one stable equilibrium and limit cycle or two stable equilibria corresponding to two opposite (cold and warm) climate-vegetation states. These states are divided by a separatrix going across a point of unstable equilibrium. Some possible stochastic scenarios caused by different externally induced natural and anthropogenic processes inherit properties of deterministic behaviour and drastically change the system dynamics...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764286/environmental-evaluation-of-flocculation-efficiency-in-the-separation-of-the-microalgal-biomass-of-scenedesmus-sp-cultivated-in-full-scale-photobioreactors
#19
Marisa D Scherer, Fernando J C Magalhães Filho, Amanda C Oliveira, Nelson F H Selesu, Cássia M L Ugaya, André B Mariano, José V C Vargas
In this paper the environmental evaluation of the separation process of the microalgal biomass Scenedesmus sp. from full-scale photobioreactors was carried out at the Research and Development Nucleus for Sustainable Energy (NPDEAS), with different flocculants (iron sulfate - FeCl3 , sodium hydroxide - NaOH, calcium hydroxide - Ca(OH)2 and aluminum sulphate Al2 (SO4 )3 , by means of the life cycle assessment (LCA) methodology, using the SimaPro 7.3 software. Furthermore, the flocculation efficiency by means of optical density (OD) was also evaluated...
May 15, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29763817/escalating-heat-stress-mortality-risk-due-to-global-warming-in-the-middle-east-and-north-africa-mena
#20
Ali Ahmadalipour, Hamid Moradkhani
Climate change will substantially exacerbate extreme temperature and heatwaves. The impacts will be more intense across the Middle East and North Africa (MENA), a region mostly characterized by hot and arid climate, already intolerable for human beings in many parts. In this study, daily climate data from 17 fine-resolution Regional Climate Models (RCMs) are acquired to calculate wet-bulb temperature and investigate the mortality risk for people aged over 65 years caused by excessive heat stress across the MENA region...
May 11, 2018: Environment International
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