scholarly journals The influence of environmental conditions (vegetation, temperature, equator, and elevation) on tropospheric nitrogen dioxide in urban areas in Indonesia

2019 ◽  
Vol 303 ◽  
pp. 012034
Author(s):  
A.D Syafei ◽  
T. D Irawandani ◽  
R. Boedisantoso ◽  
A. F Assomadi ◽  
A. Slamet ◽  
...  
Keyword(s):  
Nitrogen Dioxide ◽  
Environmental Conditions ◽  
Urban Areas

scholarly journals Landscape and Climate Influence the Patterns of Genetic Diversity and Inbreeding in Cerrado Plant Species

Diversity ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 421
Author(s):  
Luciana Cristina Vitorino ◽  
Mateus Neri Oliveira Reis ◽  
Layara Alexandre Bessa ◽  
Ueric José Borges de Souza ◽  
Fabiano Guimarães Silva
Keyword(s):  
Genetic Diversity ◽  
Plant Species ◽  
Environmental Conditions ◽  
Urban Areas ◽  
Isolation By Distance ◽  
Buffer Size ◽  
Mean Annual Temperature ◽  
Plant Populations ◽  
Landscape Features ◽  
Center Periphery

The anthropization of the landscape of the Cerrado biome that has occurred over the past few decades has fragmented its natural environments, impacting the connectivity of the plant populations and altering their gene flow. Plant species may also reduce population size in response to sub-optimal climatic and environmental conditions, and observed distribution patterns may align with theoretical schemes, such as the center–periphery model, that is, it is possible that populations on the edge have lower genetic diversity than center populations, theoretically submitted to environmental conditions closer to the optimum. In this context, we evaluate whether the genetic diversity and inbreeding coefficients of Cerrado plant species are affected by landscape features and climate characteristics, and in particular, if the distribution of the genetic diversity of these plants is consistent with the center–periphery model. To do this, we conducted a literature search for genetic studies of Cerrado plant populations using Scopus, Web of Science, and Scielo databases and the species found were used as a proxy to explore patterns throughout the biome. The data were analyzed using generalized linear mixed models (GLMM) and multiple matrix regressions (MMRRs) to evaluate the effects of landscape features and climatic variables on the observed (HO) and expected heterozygosity (HE), allelic richness (AR) and inbreeding (Fis) patterns of the local populations. The landscape was evaluated in terms of the percentage land cover of agriculture (AG), forestry (FO), remnant vegetation (RV), urban areas (UA), pasture (PA), and water (WA) within buffers of 1 km, 3 km, and 5 km around the study populations. We analyzed 121 populations of 31 plant species. The GLMMs showed that HO was affected by FO regardless of buffer size, while HE was also affected by FO, but also by WA and UA. AR was affected by WA and UA in all three buffer zones while the Fis was affected by FO and AU. The MMRRs showed that WA may affect HO, HE, and Fis within the 1 km buffer, while FO affects HO and UA affects AR within the 5 km buffer. In the case of the 1 km and 3 km buffers, however, the geographic distance between populations was identified as a factor determining the genetic diversity and inbreeding indices, indicating that isolation by distance may be an important factor defining the breeding patterns of the Cerrado plant populations. The GLMMs and MMRRs also showed that the mean annual temperature (MAT) and, to a lesser extent, isothermality (ISO) can explain the variation in genetic diversity observed in the Cerrado plant populations. We also found that the center–periphery model fits the distribution pattern observed in most of the species evaluated, including Annona crassiflora,Annona coriacea, Copaifera langsdorffii, and Eugenia dysenterica. Our results indicate that changes in the climate and the landscape of Brazilian Cerrado must be considered carefully to guarantee minimizing the impacts of these processes on the genetic diversity of Cerrado plant species and ensuring the long-term conservation of these species in this biome.

Monitoring Nitrogen Dioxide Levels in Urban Areas in Rawalpindi, Pakistan

2011 ◽  
Vol 220 (1-4) ◽  
pp. 141-150 ◽  
Author(s):  
Sheikh Saeed Ahmad ◽  
Patrick Biiker ◽  
Lisa Emberson ◽  
Rabia Shabbir
Keyword(s):  
Nitrogen Dioxide ◽  
Urban Areas

scholarly journals Erratum to: Monitoring Nitrogen Dioxide Levels in Urban Areas in Rawalpindi, Pakistan

2011 ◽  
Vol 223 (2) ◽  
pp. 955-955
Author(s):  
Sheikh Saeed Ahmad ◽  
Patrick Büker ◽  
Lisa Emberson ◽  
Rabia Shabbir
Keyword(s):  
Nitrogen Dioxide ◽  
Urban Areas

Behaviour of Pigeon Excreta on Masonry Surfaces

2018 ◽  
Vol 23 (1) ◽  
pp. 15-28 ◽  
Author(s):  
Dirk HR Spennemann ◽  
Melissa Pike ◽  
Maggie J Watson
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Building Material ◽  
Urban Areas ◽  
Real Life ◽  
The Body ◽  
Individual Bird ◽  
Bird Droppings ◽  
Pigeon Droppings ◽  
The Impact

Abstract Pigeon droppings are implicated in spoiling and decay of buildings. Several studies have examined the effects and chemistry of accumulations of pigeon droppings under highly localised pigeon roosts. Scant information exists on the impact caused by individual pigeon droppings at perch sites, even though these constitute the majority of bird use in urban areas. This study experimentally examined the processes that affect masonry immediately after pigeon excreta have been voided from the body and what effects discrete, fresh pigeon droppings have on different kinds of sandstone. The experiments demonstrated the susceptibility of freshly deposited excreta to environmental conditions (relative humidity and precipitation). In real-life situations, with pigeon excreta deposited on window ledges, cornices and parapets, the majority of damage would occur within the first two weeks of deposition. After that, the majority of individual droppings would have either dissolved or desiccated to such a degree that they would have rolled off. Much of the observed staining is superficial. While individual bird droppings make a building look dirty, even for months at a time, the effect on the building material is not substantial unless other factors come into play such as colonisation of the excreta by mould or leaching of salts from the excreta.

scholarly journals AKTIVITAS DAN KONSEKUENSI DISPERSI RADIOAKTIF UNTUK DAERAH KOTA DAN PEDESAAN

2015 ◽  
Vol 17 (2) ◽  
pp. 79 ◽  
Author(s):  
Pande Made Udiyani ◽  
Sri Kuntjoro ◽  
Jupiter Sitorus Pane
Keyword(s):  
Environmental Conditions ◽  
Rural Areas ◽  
Urban Areas ◽  
Life Time ◽  
Total Risk ◽  
Design Basis ◽  
Air Dispersion ◽  
Design Basis Accident ◽  
Urban And Rural Areas ◽  
Risk Of Cancer

ABSTRAKAKTIVITAS DAN KONSEKUENSI DISPERSI RADIOAKTIF UNTUK DAERAH KOTA DAN PEDESAAN. Konsekuensi karena lepasan kontaminan radioaktif oleh manusia dipengaruhi oleh banyak faktor seperti besarnya aktivitas kontaminan yang tersebar dan kondisi lingkungan. Kondisi lingkungan meliputi kondisi meteorologi, kontur tapak, dan pathway kontaminan ke manusia. Tujuan penelitian ini adalah analisis aktivitas dan konsekuensi radionuklida waktu paruh panjang akibat kecelakaan di daerah perkotaan dan pedesaan. Tujuan khusus adalah menghitung aktivitas dispersi udara dan deposisi permukaan, prediksi laju dosis dan risiko yang ditimbulkan untuk daerah perkotaan dan pedesaan sebagai fungsi lokasi. Metode yang digunakan adalah simulasi estimasi konsekuensi dari dispersi produk fisi di atmosfer akibat kecelakaan terpostulasi Beyond Design Basis Accident, BDBA. Perhitungan dilakukan untuk lepasan radioaktif akibat kecelakaan PWR 1000 MWe yang disimulasikan untuk area pedesaan dan perkotaan Tapak Bojanegara-Serang. Hasil analisis aktivitas dispersi udara dan deposisi permukaan untuk area pedesaan (rural) lebih tinggi dibandingkan areal perkotaan (urban). Penerimaan dosis untuk area pedesaan lebih tinggi dibandingkan dengan penerimaaan dosis area perkotaan. Dosis invidu efektif maksimum untuk area  pedesaan (rural)  adalah 9,24x10-2 Sv dan daerah perkotaan (urban) adalah 5,14x10-2 Sv. Risiko total terkena kanker untuk masyarakat yang berdomisili di area perkotaan lebih tinggi dibandingkan area pedesaan. Kata kunci: aktivitas, konsekuensi, dispersi, perkotaan, pedesaan ABSTRACTTHE ACTIVITIES AND RADIOACTIVE DISPERSION CONSEQUENCES FOR URBAN AND RURAL AREA. The consequences of radioactive releases of contaminants by humans is influenced by many factors such as the amount of activity that spread contaminants and environmental conditions. Environmental conditions include meteorological conditions, the contours of the site and contaminant pathways to humans. The purpose of this research is the analysis of the consequences of radionuclide activity and long half-life time due to accidents in urban and rural areas. The specific objective is to calculate the activity of the air dispersion and surface deposition, dose rate predictions and the risks posed to urban and rural areas as a function of the location. The estimates method used is simulation of the consequences on fission products dispersion in the atmosphere due to the postulated accident Beyond Design Basis Accident, BDBA. The calculation is performed for radioactive releases from accidents in 1000 MWe PWR simulated for rural and urban areas on Bojanegara-Serang site. Results of the analysis are that the activity of air dispersion and deposition surface at rural areas higher than urban areas. The Acceptance dose is higher for rural areas compared with urban areas. The maximum effective individual dose for rural areas is 9.24x10-2 Sv and urban areas is 5.14x10-2 Sv. The total risk of cancer for people who live in urban areas is higher than rural areas. Keywords: activity, consequence, dispersion, urban, rural 

scholarly journals Evaluation criteria and methods of environmental conditions in urban areas using remotely sensed data

2014 ◽  
pp. 39-47
Author(s):  
Liudmila Lischenko ◽  
Volodimir Filipovich ◽  
Anton Mychak ◽  
Natalia Pazynych ◽  
Alexander Teremenko
Keyword(s):  
Remote Sensing ◽  
Environmental Conditions ◽  
Urban Areas ◽  
Urban Landscape ◽  
Evaluation Criteria ◽  
Remote Sensing Data ◽  
Spectral Space ◽  
Integrated Analysis ◽  
Remotely Sensed Data ◽  
Space Images

Methodology of integral estimation of the ecological state of urban areas is examined with remote sensing data. The digitalstudy of spectral descriptions of landscape-functional zones of city onspaceimagesis used. A result of their integrated analysis is the districting of urban area relation to the level of prosperity and environmental conditions. It is proposed to distinguish six levels as follows: comfortable, optimal, satisfactory, inadequate, pre-crisis and emergency. Key words: remote sensing, multi spectral space images, urban landscape, municipal territory, environmental conditions.

scholarly journals Nitrogen Dioxide, Greenhouse Gas Emissions and Transportation in Urban Areas: Lessons From the Covid-19 Pandemic

2021 ◽  
Vol 9 ◽  
Author(s):  
Carlos E. Restrepo
Keyword(s):  
Public Health ◽  
Nitrogen Dioxide ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Public Space ◽  
Urban Areas ◽  
Ground Level ◽  
Health Concern ◽  
Public Health Perspective ◽  
Gas Emissions

Nitrogen dioxide (NO2) is a pollutant of concern in urban areas around the world. The main sources in urban environments are related to the burning of fuel and include transportation, electricity generation, and industrial and residential activities. From a public health perspective NO2 has also been widely associated with respiratory disease, including asthma exacerbation. NO2 also plays a key role in ground-level concentrations of ozone (O3), which is also a public health concern. This policy brief explores the relationships between transportation, climate change mitigation and ambient levels of air pollutants such as NO2. The Covid-19 pandemic has offered a glimpse of how rapid changes in transportation use can result in significant decreases in NO2 concentrations. Data from New York City supports this relationship. Transportation policies aimed at reducing traffic offer an opportunity to both mitigate greenhouse gas emissions and improve air quality. The implementation of measures to rethink public space and the use of streets in response to Covid-19 also provides insights into an additional policy alternative to achieve these goals.

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