نتایج جستجو برای: urban soil

تعداد نتایج: 348216  

2017
Chai Fung Pui Lesley Maurice Bilung Kasing Apun Lela Su'ut

Various prevalence studies on Leptospira in animals and humans, as well as environmental samples, had been conducted worldwide, including Malaysia. However, limited studies have been documented on the presence of pathogenic, intermediate, and saprophytic Leptospira in selected animals and environments. This study was therefore conducted to detect Leptospira spp. in rats, soil, and water from ur...

2012
Jill L. Edmondson Zoe G. Davies Nicola McHugh Kevin J. Gaston Jonathan R. Leake

Urbanization is widely presumed to degrade ecosystem services, but empirical evidence is now challenging these assumptions. We report the first city-wide organic carbon (OC) budget for vegetation and soils, including under impervious surfaces. Urban soil OC storage was significantly greater than in regional agricultural land at equivalent soil depths, however there was no significant difference...

2016
Boban Mugoša Dijana Đurović Mirjana Nedović-Vuković Snežana Barjaktarović-Labović Miroslav Vrvić

Assessment of heavy metal concentrations in the soil samples of urban parks and playgrounds is very important for the evaluation of potential risks for residents, especially children. Until recently, there has been very little data about urban parks pollution in Montenegro. To evaluate the sources of potential contamination and concentration of heavy metals, soil samples from coastal urban park...

2006
Katalin Szlavecz Sarah A. Placella Richard V. Pouyat Peter M. Groffman Csaba Csuzdi Ian Yesilonis

Invasive non-native earthworms in forested areas of the northeastern United States are of concern since they have the potential to greatly change the nutrient dynamics of these ecosystems. Urban landscapes are particularly susceptible to non-native species invasions. In this study, we assessed earthworm communities and nitrogen transformations rates in urban and rural forest patches of the Grea...

2017
Haitao Wang Christopher W. Marshall Minying Cheng Huijuan Xu Hu Li Xiaoru Yang Tianling Zheng

Transition of populations from rural to urban living causes landscape changes and alters the functionality of soil ecosystems. It is unclear how this urbanization disturbs the microbial ecology of soils and how the disruption influences nitrogen cycling. In this study, microbial communities in turfgrass-grown soils from urban and suburban areas around Xiamen City were compared to microbial comm...

Journal: :Environmental geochemistry and health 2018
Mark A S Laidlaw Callum Gordon Andrew S Ball

Urban soils in many cities have been found to be contaminated with lead from past usage of leaded petrol, deteriorating lead-based exterior paints and industrial sources. Currently, the spatial distribution of soil lead concentrations in the Melbourne metropolitan area is unknown. The objective of this study was to perform a preliminary assessment of the spatial distributions of the surface soi...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2015
Yingbin Deng Changshan Wu Miao Li Renrong Chen

Understanding land use land cover change (LULCC) is a prerequisite for urban planning and environment management. For LULCC studies in urban/suburban environments, the abundance and spatial distributions of bare soil are essential due to its biophysically different properties when compared to anthropologic materials. Soil, however, is very difficult to be identified using remote sensing technol...

2012
Lixin Chen Zhiqiang Zhang Brent E. Ewers

BACKGROUND The functional convergence of tree transpiration has rarely been tested for tree species growing under urban conditions even though it is of significance to elucidate the relationship between functional convergence and species differences of urban trees for establishing sustainable urban forests in the context of forest water relations. METHODOLOGY/PRINCIPAL FINDINGS We measured sa...

2002
Ming-Chih Hung

This is a study of modeling urban environments from TM satellite images. Urban environments are so heterogeneous. It is necessary to simplify them as combinations of basic land cover materials in order to enable quantitative studies. The V-I-S model proposed by Ridd in 1995 is a conceptual model to simplify urban environments as combination of three basic ground components: vegetation, impervio...

Journal: :iranian journal of public health 0
nurul syazani yuswir sarva mangala praveena ahmad zaharin aris sharifah norkhadijah syed ismail zailina hashim

background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...

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