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Environmental Monitoring and Assessment

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https://www.readbyqxmd.com/read/29790014/biochemical-profile-of-non-enzymatic-stress-markers-in-the-plant-species-urginea-maritima-in-a-mediterranean-natural-reserve-exposed-to-oxidative-stress
#1
Yara Khairallah, Tarek Houri, Bilal Osta, Dany Romanos, Georges Haddad
Protected areas decrease degrading natural ecosystems due to pollution such as air pollution. In 1981, the inhabitants founded Bentael natural reserve in Byblos, Lebanon, to secure their region against urbanization projects, like the recently constructed road that threatens the biodiversity of the reserve. This study was conducted to determine the oxidative stress resulting from this pollution and that menaces 360 floral species among them a rare species "Urginea maritima." In this research, the biomonitoring approach was experienced to assess the oxidative stress...
May 22, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29789963/experimental-arid-land-afforestation-in-central-anatolia-turkey
#2
Oktay Yildiz, Ernaz Altundağ, Bilal Çetin, Ş Teoman Güner, Murat Sarginci, Bulent Toprak
The afforestation of arid lands faces many challenges, and perhaps the most important key for success is choosing one or more species that are adapted well for local environmental conditions. We explored species that would be suitable for the steppe region of Central Anatolia. Intensive site preparation included ripping the subsoil (to 80 cm) and plowing the upper soil before planting seedlings of Elaeagnus angustifolia, Robinia pseudoacacia, Fraxinus angustifolia, and Pinus nigra were used as tree species...
May 22, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29785575/vehicular-stress-a-cause-for-heavy-metal-accumulation-and-change-in-physico-chemical-characteristics-of-road-side-soils-in-pahalgam
#3
Dig Vijay Singh, Javeed Iqbal Ahmad Bhat, Rouf Ahmad Bhat, Moonisa Aslam Dervash, Sartaj Ahmad Ganei
In an effort to determine vehicular impact on soil quality, soil samples were collected from three different zones (Pahalgam, Batakote, and Chandanwari) in Pahalgam forest ecosystem. Results showed that a significant decrease in moisture content, organic carbon, available nitrogen, and potassium was observed in nearby road side soils. However, pH was observed to be on neutral side and available phosphorus recorded high concentration. The concentration of heavy metals Pb2+ , Cu2+ , Zn2+ , Ni2+ , and Cd2+ estimated was also significantly high...
May 22, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29785643/estimating-and-mapping-forest-biomass-using-regression-models-and-spot-6-images-case-study-hyrcanian-forests-of-north-of-iran
#4
Mohadeseh Ghanbari Motlagh, Sasan Babaie Kafaky, Asadollah Mataji, Reza Akhavan
Hyrcanian forests of North of Iran are of great importance in terms of various economic and environmental aspects. In this study, Spot-6 satellite images and regression models were applied to estimate above-ground biomass in these forests. This research was carried out in six compartments in three climatic (semi-arid to humid) types and two altitude classes. In the first step, ground sampling methods at the compartment level were used to estimate aboveground biomass (Mg/ha). Then, by reviewing the results of other studies, the most appropriate vegetation indices were selected...
May 21, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29785545/development-of-gp-and-gep-models-to-estimate-an-environmental-issue-induced-by-blasting-operation
#5
Roohollah Shirani Faradonbeh, Mahdi Hasanipanah, Hassan Bakhshandeh Amnieh, Danial Jahed Armaghani, Masoud Monjezi
Air overpressure (AOp) is one of the most adverse effects induced by blasting in the surface mines and civil projects. So, proper evaluation and estimation of the AOp is important for minimizing the environmental problems resulting from blasting. The main aim of this study is to estimate AOp produced by blasting operation in Miduk copper mine, Iran, developing two artificial intelligence models, i.e., genetic programming (GP) and gene expression programming (GEP). Then, the accuracy of the GP and GEP models has been compared to multiple linear regression (MLR) and three empirical models...
May 21, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29785463/the-north-american-forest-database-going-beyond-national-level-forest-resource-assessment-statistics
#6
W Brad Smith, Rubí Angélica Cuenca Lara, Carina Edith Delgado Caballero, Carlos Isaías Godínez Valdivia, Joseph S Kapron, Juan Carlos Leyva Reyes, Carmen Lourdes Meneses Tovar, Patrick D Miles, Sonja N Oswalt, Mayra Ramírez Salgado, Xilong Alex Song, Graham Stinson, Sergio Armando Villela Gaytán
Forests cannot be managed sustainably without reliable data to inform decisions. National Forest Inventories (NFI) tend to report national statistics, with sub-national stratification based on domestic ecological classification systems. It is becoming increasingly important to be able to report statistics on ecosystems that span international borders, as global change and globalization expand stakeholders' spheres of concern. The state of a transnational ecosystem can only be properly assessed by examining the entire ecosystem...
May 21, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29777392/determining-representative-ranges-of-point-sensors-in-distributed-networks
#7
John K Horne, Dale A Jacques
Distributed networks of stationary instruments provide high temporal scope (i.e., range/resolution) observations but are spatially limited as a set of point measurements. Measurement similarity between points typically decays with distance, which is used to set interpolation distances. The importance of analyzing spatiotemporal data at equivalent spatial and temporal scales has been identified but no standard procedure is used to interpolate space using temporally-indexed observations. Using concurrent mobile and stationary active acoustic, fish density data from a tidal energy site in Puget Sound, WA, USA, six methods are compared to estimate the range at which stationary measurements can be spatially interpolated...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29777312/evaluating-organochlorine-pesticide-residues-in-the-aquatic-environment-of-the-lake-naivasha-river-basin-using-passive-sampling-techniques
#8
Yasser Abbasi, Chris M Mannaerts
Passive sampling techniques can improve the discovery of low concentrations by continuous collecting the contaminants, which usually go undetected with classic and once-off time-point grab sampling. The aim of this study was to evaluate organochlorine pesticide (OCP) residues in the aquatic environment of the Lake Naivasha river basin (Kenya) using passive sampling techniques. Silicone rubber sheet and Speedisk samplers were used to detect residues of α-HCH, β-HCH, γ-HCH, δ-HCH, heptachlor, aldrin, heptachlor epoxide, pp-DDE, endrin, dieldrin, α-endosulfan, β-endosulfan, pp-DDD, endrin aldehyde, pp-DDT, endosulfan sulfate, and methoxychlor in the Malewa River and Lake Naivasha...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29770890/the-effects-of-gypsum-and-mulch-applications-on-reclamation-parameters-and-physical-properties-of-an-alkali-soil
#9
Cagla Temiz, Gokhan Cayci
Alkali soils have undesirable properties for crop production. However, these problematic areas can be reclaimed and regained for cultivation. Mulch materials have been used in the past to decrease salinity damage in saline soils. But information about using mulch materials for alkali soil reclamation is rare. The aim of this study was to determine the combined effects of different levels of gypsum applied with straw or pumice mulch materials on the reclamation of an alkali soil. Results obtained from soil extracts during the leaching water cycles showed that gypsum and mulch materials caused significant differences in sodium adsorption ratio (SAR) and electrical conductivity (EC) values...
May 17, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29766315/validation-and-determination-of-nine-pfcs-in-surface-water-and-sediment-samples-using-uplc-qtof-ms
#10
B O Fagbayigbo, B O Opeolu, O S Fatoki, O S Olatunji
In this study, an analytical method for the routine determination of nine perfluorinated compounds (PFCs), using ultra performance liquid chromatography coupled to a quadrupole time-of-flight mass spectrometer (UPLC-QTOF-MS), was developed, validated, and used for their assay in surface water and sediments. The method yielded good linearity with a correlation coefficient (R2 ) ranging between 0.991 and 0.999 for all the compounds investigated. Limits of detection (LOD) ranged between 0.02 and 0.08 ng/l, while the limit of quantification (LOQ) ranged from 0...
May 15, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29761238/cadmium-sorption-and-extractability-in-tropical-soils-with-variable-charge
#11
Marina Colzato, Luís Reynaldo Ferracciú Alleoni, Marcos Yassuo Kamogawa
The availability of cadmium (Cd) for plants and its impact in the environment depends on Cd sorption in soil colloids. The study of Cd sorption in soil and its fractionation is an interesting tool for the evaluation of Cd affinity with soil pools. The objective with this study was to evaluate Cd sorption and desorption in tropical soils with variable charge (three Oxisols), in a Mollisol and in two Entisols with diverse physical, chemical, and mineralogical attributes. We used a thermodynamic approach to evaluate Cd sorption and performed a chemical fractionation of Cd in the six soils...
May 14, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29754219/monitoring-and-assessing-a-2-year-outbreak-of-the-corallivorous-seastar-acanthaster-planci-in-ari-atoll-republic-of-maldives
#12
Luca Saponari, Enrico Montalbetti, Paolo Galli, Giovanni Strona, Davide Seveso, Inga Dehnert, Simone Montano
Outbreaks of the corallivorous crown-of-thorns seastars have received increasing attention due to their negative impacts on coral reefs in the Indo-Pacific Ocean. However, outbreaks in remote and dislocated islands are still poorly understood. This study aims to begin filling informational gaps regarding outbreaks of Acanthaster planci in the remote islands of the central Ari Atoll, Republic of Maldives. The population of A. planci was monitored during three periods over 2 years (2015-2016) to evaluate variations in abundance and to characterise size structure and feeding behaviour...
May 12, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29752655/hierarchical-classification-of-land-use-types-using-multiple-vegetation-indices-to-measure-the-effects-of-urbanization
#13
Sharmin Shishir, Shiro Tsuyuzaki
Detecting fine-scale spatiotemporal land use changes is a prerequisite for understanding and predicting the effects of urbanization and its related human impacts on the ecosystem. Land use changes are frequently examined using vegetation indices (VIs), although the validation of these indices has not been conducted at a high resolution. Therefore, a hierarchical classification was constructed to obtain accurate land use types at a fine scale. The characteristics of four popular VIs were investigated prior to examining the hierarchical classification by using Purbachal New Town, Bangladesh, which exhibits ongoing urbanization...
May 11, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29752642/can-short-term-pasture-management-increase-c-balance-in-the-atlantic-rainforest
#14
Paulo Roberto da Rocha Junior, Felipe Vaz Andrade, Lucas Santos Satiro, Guilherme Kangussú Donagemma, Eduardo de Sá Mendonça
Few studies have shown the importance of different pasture management practices on C storage and the reduction of CO2 -C emissions in tropical conditions. The objective of the present study was to determine short-term changes in C pools and C balance from different pasture management practices established in the Atlantic Rainforest. A field study was carried out in Alegre, ES, Brazil from September 2013 to August 2014 to investigate the first-year effect of pasture management practices on a Udult clayey soil...
May 11, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29748822/vascular-plant-and-bryophyte-species-richness-in-response-to-water-quality-in-lowland-spring-niches-with-different-anthropogenic-impacts
#15
Katarzyna Puczko, Piotr Zieliński, Szymon Jusik, Anita Kołakowska, Elżbieta Jekatierynczuk-Rudczyk
Many freshwater ecosystems face severe threats from anthropogenic disturbances. In the field, we investigated the morphology of spring niches and the species richness of vascular plants and bryophytes in 16 springs, draining the quaternary aquifers, located in two different environments-an urban area (city of Białystok) and a protected area (Knyszyn Forest Landscape Park, NE Poland). In total, 47 vascular plant and 45 bryophyte species were recorded, representing mostly crenophytes including protected species...
May 10, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29748785/determining-%C3%AE-15-n-no-3-values-in-soil-water-and-air-samples-by-chemical-methods
#16
Chaopu Ti, Xi Wang, Xiaoyuan Yan
Soil, water, and air NO3 - pollution is a major environmental problem worldwide. Stable isotope analysis can assess the origin of NOx because different NOx sources carry different isotope signatures. Hence, using appropriate chemical methods to determine the δ15 N-NOx values in different samples is important to improve our understanding of the N-NOx pollution and take possible strategies to manage it. Two modified chemical methods, the cadmium-sodium azide method and the VCl3 -sodium azide method, were used to establish a comprehensive inventory of δ15 N-NOx values associated with major NOx fluxes by the conversion of NO3 - into N2 O...
May 10, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29748751/in-situ-generation-of-hydroxyl-radical-for-efficient-degradation-of-2-4-dichlorophenol-from-aqueous-solutions
#17
Saeid Ahmadzadeh, Maryam Dolatabadi
Since 2,4-dichlorophenol (2,4-DCP) as a priority pollutant is used in numerous industrial processes, its removal from the aqueous environment is of utmost importance and desire. Herein, the authors describe an electrochemical treatment process for efficient removal of 2,4-DCP from aqueous solutions using electro-Fenton (EF) process. Response surface methodology (RSM) was applied to optimize the operating parameters. Analysis of variance (ANOVA) confirmed the significance of the predicted model. The effect of independent variables on the removal of 2,4-DCP was investigated and the best removal efficiency of 98...
May 10, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29748723/associations-between-riffle-development-and-aquatic-biota-following-lowhead-dam-removal
#18
Danielle R Cook, S Mažeika P Sullivan
Dam removal is an increasingly common river restoration option, yet some of the mechanisms leading to ecological changes remain unquantified. We assessed relationships between riffle structure and benthic macroinvertebrate and fish assemblages 2 years after a lowhead dam removal in Ohio, USA. Hydrogeomorphic, water-chemistry, and biotic surveys were conducted at seven study riffles at six time intervals from spring 2014 through summer 2015. The density and diversity of macroinvertebrates and fish were significantly different over time, largely as a function of season (lowest densities in early spring, greatest in summer)...
May 10, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29744742/simultaneous-determination-and-risk-assessment-of-metalaxyl-and-azoxystrobin-in-potato-by-liquid-chromatography-with-tandem-mass-spectrometry
#19
Weiwei Yu, Xiaoshuang Luo, Xinxian Qin, Min Huang, Jian Li, Song Zeng, Kankan Zhang, Deyu Hu
A liquid chromatography with tandem mass spectrometry method was developed and validated to simultaneously determine metalaxyl and azoxystrobin in soil, potato, and potato foliage samples. The samples were extracted by 20 mL of acetonitrile and purified with dispersive solid-phase extraction using octadecyl silane as sorbent. The method showed good linearity (determination coefficients ≥ 0.9926) for metalaxyl (2.5-500 ng/mL) and azoxystrobin (5-1000 ng/mL). The limits of detection and quantification for both fungicides were 1...
May 9, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29744690/predicting-the-origins-of-next-forest-based-emerging-infectious-disease
#20
Vishal Shah, Anand Shah, Varoon Joshi
Land use change near dense forests is the single major cause of emergence of forest-based emerging infectious diseases (EIDs) among humans. In an attempt to predict where the next EID would originate from, we are hypothesizing that future EIDs would originate from a region having high population density, excessive poverty, and is located near dense vegetation. Using ArcGIS, we identified forest regions in ten countries across the globe that meet all the three conditions identified in the hypothesis. We further narrowed down the locations using Global Forest Watch data, which eliminates locations next to protected forests and fragmented forests...
May 9, 2018: Environmental Monitoring and Assessment
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