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https://www.readbyqxmd.com/read/28110455/influence-of-environmental-and-anthropogenic-factors-at-the-bottom-sediments-in-a-doce-river-tributary-in-brazil
#1
Deyse Almeida Dos Reis, Aníbal da Fonseca Santiago, Laura Pereira Nascimento, Hubert Mathias Peter Roeser
In developing countries, it is uncommon to find watersheds that have been the object of detailed environmental studies. It makes the assessment of the magnitude of environmental impacts and pollution of these sites difficult. This research demonstrated ways to understand the dynamics of river bottom sediments contamination, even for watersheds with a lack of environmental data. Based on geochemical affinity, we conducted a comprehensive study on the concentration of metals and metalloids. Then, we discussed the probable origin of the concentration of these elements at the bottom sediment along the Matipó River...
January 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28110454/tackling-the-salinity-pollution-nexus-in-coastal-aquifers-from-arid-regions-using-nitrate-and-boron-isotopes
#2
V Re, E Sacchi
Salinization and nitrate pollution are generally ascertained as the main issues affecting coastal aquifers worldwide. In arid zones, where agricultural activities also result in soil salinization, both phenomena tend to co-exist and synergically contribute to alter groundwater quality, with severe negative impacts on human populations and natural ecosystems' wellbeing. It becomes therefore necessary to understand if and to what extent integrated hydrogeochemical tools can help in distinguishing among possible different salinization and nitrate contamination origins, in order to provide adequate science-based support to local development and environmental protection...
January 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28110371/jilun-li-and-his-profound-impact-on-theoretical-and-applied-agricultural-microbiology
#3
Chengbo Rong, Yu Liu, Ying Wen
No abstract text is available yet for this article.
January 21, 2017: Protein & Cell
https://www.readbyqxmd.com/read/28110359/spatial-dependence-and-determinants-of-dairy-farmers-adoption-of-best-management-practices-for-water-protection-in-new-zealand
#4
Wei Yang, Basil Sharp
This paper analyses spatial dependence and determinants of the New Zealand dairy farmers' adoption of best management practices to protect water quality. A Bayesian spatial durbin probit model is used to survey data collected from farmers in the Waikato region of New Zealand. The results show that farmers located near each other exhibit similar choice behaviour, indicating the importance of farmer interactions in adoption decisions. The results also address that information acquisition is the most important determinant of farmers' adoption of best management practices...
January 21, 2017: Environmental Management
https://www.readbyqxmd.com/read/28110358/pollution-assessment-of-the-biob%C3%A3-o-river-chile-prioritization-of-substances-of-concern-under-an-ecotoxicological-approach
#5
Álvaro Alonso, Ricardo Figueroa, Pilar Castro-Díez
The water demand for human activities is rapidly increasing in developing countries. Under these circumstances, preserving aquatic ecosystems should be a priority which requires the development of quality criteria. In this study we perform a preliminary prioritization of the risky substances based on reported ecotoxicological studies and guidelines for the Biobío watershed (Central Chile). Our specific aims are (1) reviewing the scientific information on the aquatic pollution of this watershed, (2) determining the presence and concentration of potential toxic substances in water, sediment and effluents, (3) searching for quality criteria developed by other countries for the selected substances and (4) prioritizing the most risky substances by means of deterministic ecotoxicological risk assessment...
January 21, 2017: Environmental Management
https://www.readbyqxmd.com/read/28110349/organochlorine-pesticides-in-gonad-brain-and-blood-of-mice-in-two-agricultural-areas-of-sinaloa
#6
Ernestina Perez-Gonzalez, Ulises-Giovanni Osuna-Martinez, Maria-Nancy Herrera-Moreno, Guadalupe-Durga Rodriguez-Meza, Hector-A Gonzalez-Ocampo, Marcos Bucio-Pacheco
The adverse effect of pesticides on non-target wildlife and human health is a primary concern in the world, but in Mexico, we do not know which wildlife species are at the greatest risk. The aim of this study was to determine organochlorine pesticides in mice of two agricultural fields in Sinaloa, Culiacan and Guasave. Procedures of extraction, analysis, and quantification were followed according to the modified EPA 8081b method. In three mouse tissues (gonad, brain, and blood), γBHC and decachlorobiphenyl with a frequency higher than 50% and endosulfan sulfate with 43% were observed...
January 21, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28110278/a-portrait-of-the-c4-photosynthetic-family-on-the-50th-anniversary-of-its-discovery-species-number-evolutionary-lineages-and-hall-of-fame
#7
REVIEW
Rowan F Sage
Fifty years ago, the C4 photosynthetic pathway was first characterized. In the subsequent five decades, much has been learned about C4 plants, such that it is now possible to place nearly all C4 species into their respective evolutionary lineages. Sixty-one independent lineages of C4 photosynthesis are identified, with additional, ancillary C4 origins possible in 12 of these principal lineages. The lineages produced ~8100 C4 species (5044 grasses, 1322 sedges, and 1777 eudicots). Using midpoints of stem and crown node dates in their respective phylogenies, the oldest and most speciose C4 lineage is the grass lineage Chloridoideae, estimated to be near 30 million years old...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110212/effects-of-hydrochemistry-variables-on-the-half-life-of-mancozeb-and-on-the-hazard-index-associated-to-the-sum-of-mancozeb-and-ethylenethiourea
#8
O López-Fernández, E Pose-Juan, R Rial-Otero, J Simal-Gándara
Mancozeb is a dithiocarbamate non-systemic agricultural fungicide with multi-site, protective action. It helps to control many fungal diseases in a wide range of field crops, fruits, nuts, vegetables, and ornamental plants. We have investigated the stability profiles of mancozeb in aqueous solutions to determine the effect of pH, temperature and light on the degradation process of mancozeb. In addition, the toxicological risk for humans associated with the joint intake of mancoze7b and its final degradation product, ethylenethiourea (ETU), was calculated and modelled as a function of the experimental conditions...
January 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28110013/dna-damage-and-translational-response-during-detoxification-from-copper-exposure-in-a-wild-population-of-chironomus-riparius
#9
Paola Bernabò, Matteo Gaglio, Francesco Bellamoli, Gabriella Viero, Valeria Lencioni
Copper is one of the predominant components of pesticides employed in agriculture and known to be highly toxic once it reaches aquatic organisms. The impact of sublethal concentrations of this metal on wild insects is not yet completely understood. Studies addressing alterations in different levels of gene expression are still lacking. We previously demonstrated that in a wild population of Chironomus riparius, HSP and CYP families of genes were up-regulated at the transcriptional level after copper exposure...
January 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28109972/biological-responses-to-phenylurea-herbicides-in-fish-and-amphibians-new-directions-for-characterizing-mechanisms-of-toxicity
#10
Vicki L Marlatt, Christopher J Martyniuk
Urea-based herbicides are applied in agriculture to control broadleaf and grassy weeds, acting to either inhibit photosynthesis at photosystem II (phenylureas) or to inhibit acetolactate synthase acetohydroxyacid synthase (sulfonylureas). While there are different chemical formulas for urea-based herbicides, the phenylureas are a widely used class in North America and have been detected in aquatic environments due to agricultural run-off. Here, we summarize the current state of the literature, synthesizing data on phenylureas and their biological effects in two non-target animals, fish and amphibians, with a primary focus on diuron and linuron...
January 18, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28109660/spatial-distribution-of-soil-chemical-properties-in-an-organic-farm-in-croatia
#11
Igor Bogunovic, Paulo Pereira, Eric C Brevik
Soil pH, electrical conductivity (EC), organic matter (OM), available phosphorus (AP), and potassium (AK) are some of the most important indicators of soil fertility. These soil parameters are highly variable in space and time, especially in agricultural areas, with implications for crop production. The aim of this work was to study the spatial variability of pH, EC, OM, AP and AK using kriging and co-kriging methods in the Rasa River Valley (Croatia). As co-variates for each variable we considered the distance from the sea (DFS), distance from the river channels (DFC), pH, EC, OM, AP and AK...
January 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28109423/moving-beyond-the-debate-over-restricting-sugary-drinks-in-the-supplemental-nutrition-assistance-program
#12
EDITORIAL
Marlene B Schwartz
To address the dual problem of food insecurity and poor nutrition, the U.S. Department of Agriculture has recently revised the nutrition standards for nearly all of its federal food programs to align with the Dietary Guidelines for Americans. One notable exception is the Supplemental Nutrition Assistance Program (SNAP). Policy proposals to restrict SNAP benefits based on nutrition quality (e.g., excluding sugary drinks) have generated controversy and have polarized previous research and advocacy allies. This essay presents many of the issues that have emerged, which include challenges about the feasibility, justification, and effectiveness of restricting benefits; the risk of a slippery slope; concerns about participant dignity; and finally, distrust about the motives behind promoting and opposing a policy change...
February 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28109418/rebates-to-incentivize-healthy-nutrition-choices-in-the-supplemental-nutrition-assistance-program
#13
EDITORIAL
Lauren E W Olsho, Jacob A Klerman, Susan H Bartlett, Christopher W Logan
Price incentives, or rebates, have been proposed as one promising strategy for improving diet quality among Supplemental Nutrition Assistance Program participants. This paper explores the existing evidence on effectiveness of rebates in this program. In particular, this paper considers findings from a recent RCT of Supplemental Nutrition Assistance Program rebates, the U.S. Department of Agriculture Healthy Incentives Pilot, in the context of the broader literature on rebate strategies. The paper concludes that rebates have a moderate impact on food intake, at moderate cost relative to alternative interventions...
February 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28109070/peste-des-petits-ruminants-risk-factors-and-space-time-clusters-in-mymensingh-bangladesh
#14
M S Rony, A K M A Rahman, M M Alam, N Dhand, M P Ward
Using a hospital-based case-control study design, our aim was to identify risk factors for-and space-time clusters of-Peste des Petits Ruminants (PPR) in Mymensingh, Bangladesh. Three hundred and eighty PPR cases diagnosed between January 2005 and December 2014 at the Bangladesh Agricultural University Veterinary Teaching Hospital (BAUVTH) were selected; three controls per case from BAUVTH were then selected (n = 1,048). From records, data extracted included information on date of report, location, age, breed, sex and body weight of goats...
January 21, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28108925/soil-compaction-effects-on-soil-health-and-cropproductivity-an-overview
#15
Adnan Noor Shah, Mohsin Tanveer, Babar Shahzad, Guozheng Yang, Shah Fahad, Saif Ali, Muhammad Adnan Bukhari, Shahbaz Atta Tung, Abdul Hafeez, Biangkham Souliyanonh
Soil compaction causes substantial reduction in agriculture productivity and has always been of great distress for farmers. Intensive agriculture seems to be more crucial in causing compaction. High mechanical load, less crop diversification, intensive grazing, and irrigation methods lead to soil compaction. It is further exasperated when these factors are accompanied with low organic matter, animal trampling, engine vibrations, and tillage at high moisture contents. Soil compaction increases soil bulk density and soil strength, while decreases porosity, aggregate stability index, soil hydraulic conductivity, and nutrient availability, thus reduces soil health...
January 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108919/modification-of-the-137-cs-90-sr-and-60-co-transfer-to-wheat-plantlets-by-nh4-fertilizers
#16
J Guillén, G Muñoz-Muñoz, A Baeza, A Salas, N Mocanu
Inorganic fertilizers are used as agricultural countermeasures intended to inhibit the soil to plant transfer of radionuclides after a radioactive fallout. Two NH4(+) fertilizers, diammonium phosphate (DAP) and NPK, were applied to soil contaminated with a mixture of radionuclides to analyze whether they modify the transfer of (137)Cs, (90)Sr, and (60)Co and stable elements (K, Na, Ca, and Mg) to wheat plantlets grown under controlled laboratory conditions. DAP introduced NH4(+) in the soil, which can increase (137)Cs transfer, while NPK also introduced K(+), which can decrease it...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108915/microbial-changes-linked-to-the-accelerated-degradation-of-the-herbicide-atrazine-in-a-range-of-temperate-soils
#17
R L Yale, M Sapp, C J Sinclair, J W B Moir
Accelerated degradation is the increased breakdown of a pesticide upon its repeated application, which has consequences for the environmental fate of pesticides. The herbicide atrazine was repeatedly applied to soils previously untreated with s-triazines for >5 years. A single application of atrazine, at an agriculturally relevant concentration, was sufficient to induce its rapid dissipation. Soils, with a range of physico-chemical properties and agricultural histories, showed similar degradation kinetics, with the half-life of atrazine decreasing from an average of 25 days after the first application to <2 days after the second...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108870/elucidating-the-interactions-and-phytotoxicity-of-zinc-oxide-nanoparticles-with-agriculturally-beneficial-bacteria-and-selected-crop-plants
#18
Anuraag Boddupalli, Rameshwar Tiwari, Anamika Sharma, Surender Singh, Radha Prasanna, Lata Nain
There is a growing interest in the use of bioinoculants to assist mineral fertilizers in improving crop production and yield. Azotobacter and Pseudomonas are two agriculturally relevant strains of bacteria which have been established as efficient bioinoculants. An experiment involving addition of graded concentrations of zinc oxide (ZnO) nanoparticles was undertaken using log phase cultures of Azotobacter and Pseudomonas. Growth kinetics revealed a clear trend of gradual decrease with Pseudomonas; however, Azotobacter exhibited a twofold enhancement in growth with increase in the concentration of ZnO concentration...
January 20, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28108108/pharmaceuticals-and-personal-care-products-in-plants
#19
REVIEW
Mireia Bartrons, Josep Peñuelas
Pharmaceuticals and personal-care products (PPCPs) derived from agricultural, urban, and industrial areas accumulate in plants at concentrations (ng to μg kg(-1)) that can be toxic to the plants. Importantly, the dietary intake of these PPCP-contaminated plants may also pose a risk to human health, but currently little is known about the fate of PPCPs in plants and their effect on or risk to the ecosystem. In this Opinion article we propose that in-depth research on the use of plants as a monitoring device for assessing the use and environmental presence of PPCPs is warranted...
January 17, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28107530/broad-scale-genetic-diversity-of-cannabis-for-forensic-applications
#20
Christophe Dufresnes, Catherine Jan, Friederike Bienert, Jérôme Goudet, Luca Fumagalli
Cannabis (hemp and marijuana) is an iconic yet controversial crop. On the one hand, it represents a growing market for pharmaceutical and agricultural sectors. On the other hand, plants synthesizing the psychoactive THC produce the most widespread illicit drug in the world. Yet, the difficulty to reliably distinguish between Cannabis varieties based on morphological or biochemical criteria impedes the development of promising industrial programs and hinders the fight against narcotrafficking. Genetics offers an appropriate alternative to characterize drug vs...
2017: PloS One
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