scholarly journals Structure and Composition of Plant Vegetation in Urban Area of Dhaka South City Corporation, Bangladesh

2017 ◽  
Author(s):  
Md. Shahariar Jaman ◽  
Ishrat Jahan ◽  
Mahbuba Jamil ◽  
Md. Golam Jilani Helal ◽  
Md. Shariful Islam ◽  
...  
Keyword(s):  
Plant Species ◽  
Green Infrastructure ◽  
Cocos Nucifera ◽  
Basal Area ◽  
Urban Ecosystems ◽  
Average Frequency ◽  
Swietenia Macrophylla ◽  
Samanea Saman ◽  
Polyalthia Longifolia ◽  
The City

Plants are an important feature of urban ecosystems which provide numerous environmental and ecosystem benefits such as defenses against noise and air pollution and conservation of biodiversity. The aim of this study was to investigate the structure and composition of urban vegetation in different urban habitats like roadsides, parks, gardens and playgrounds in Dhaka South City area. Stratified random sampling method was used in this study. A total of 221 plant species belonging to 63 families were identified and recorded. Among all plant species Swietenia macrophylla, Polyalthia longifolia, Cocos nucifera, Samanea saman, and Artocarpus heterophyllus are recorded as the most dominant. Most of the tree and shrub population were found between 6-9 m and 1-3m height classes whereas most of tree and shrub population were found in between 10-15cm dbh classes. Highest IVI was found for Swietenia macrophylla (193.22%) followed by Polyalthia longifolia (184.59%), Samanea saman (138.37%), Cocos nucifera (79.9%) and Delonix regia (68.27%) respectively. Average frequency, density, dbh and basal area were found 46.82%, 138.28 tree ha-1, 458.59 cm ha-1 and 12.33 m2 ha-1 respectively. Findings of this study reveals that structural attributes of plant represent quite young and still developing vegetation. This research will help to plan for future green infrastructure which will maintain ecosystem function, therefore, providing longer term benefits for the city dwellers.

scholarly journals The use of plants on balconies in the city

2020 ◽  
Vol 47 (No. 3) ◽  
pp. 180-187
Author(s):  
Agnieszka Krzymińska ◽  
Jan Bocianowski ◽  
Katarzyna Mądrachowska
Keyword(s):  
Plant Species ◽  
Green Infrastructure ◽  
Close Contact ◽  
Easy Access ◽  
Pelargonium Zonale ◽  
Urban Green ◽  
Pelargonium Peltatum ◽  
Urban Green Infrastructure ◽  
The City

As a popular and excellent place for plants, balconies enable people easy access to and close contact with nature, thus forming an integral part of the urban green infrastructure. The aim of the study was to assess the use of plants on balconies of detached houses and blocks of flats in the small Polish town of Sieraków. Plants were grown on about 33% of the balconies of detached houses and on 51% of the balconies of blocks of flats. Most of the balconies were decorated with one plant species only and the plants were most frequently placed on the railing. The most popular plant species were Pelargonium peltatum (L.) L’Hér., Pelargonium zonale (L.) L’Hér. and Petunia × atkinsiana D. Don. There were no large differences between both the building types as regards to the balcony decoration.

scholarly journals Useful wasteland - the potential of undeveloped land in modification of urban green infrastructure based on the city of Poznań

2018 ◽  
Vol 22 (4) ◽  
pp. 225-230 ◽  
Author(s):  
Anna Gałecka-Drozda ◽  
Elżbieta Raszeja
Keyword(s):  
Green Infrastructure ◽  
Urban Landscape ◽  
Community Gardens ◽  
Urban Ecosystems ◽  
Barren Land ◽  
Recreation Areas ◽  
Railway Infrastructure ◽  
Abandoned Land ◽  
Local Residents ◽  
The City

Abstract Numerous barren land areas are found within administrative boundaries of cities. They include both former farmland located at the outskirts of cities, as well as vacant plots, postindustrial plots or former railway infrastructure plots. Barren plots are integral elements of the urban landscape and contemporary scientific concepts indicate their important role in the functioning of urban ecosystems. Abandoned land provides a potential for the development of green infrastructure and further development of recreation areas. At the same time some abandoned plots are informally adapted by local residents to suit their needs, transforming them into community gardens and recreation areas. This paper presents results of studies conducted by the authors in selected derelict areas in the city of Poznań. Analyses were conducted on their type, origin, size and location within the city. Observations were also recorded on the methods to adapt abandoned land by local communities.

scholarly journals Avispas (Insecta: Hymenoptera) asociadas a árboles urbanos de la ciudad de Bogotá, Colombia

2020 ◽  
Vol 46 (4) ◽  
pp. 681-698
Author(s):  
Juliana Durán-Prieto ◽  
Esteban Tulande-Marín ◽  
Valentina Ocampo-Flóres
Keyword(s):  
Plant Species ◽  
Urban Ecosystems ◽  
Terrestrial Ecosystems ◽  
Urban Ecosystem ◽  
Urban Trees ◽  
Biocontrol Agents ◽  
Ecological Processes ◽  
Urban Flora ◽  
First Time ◽  
The City

Urban trees are a source of food resources, habitat and refuge for the biodiversity that occurs in cities. However, the taxonomic identity and status of each plant species as native and / or exotic of in an ecosystem influences its interactions with biodiversity. Wasps are one of the main insects present in terrestrial ecosystems, including urban ecosystems, as components of their biodiversity, playing an important role as biocontrol agents (predators and parasitoids) of populations of other insects associated with urban flora or as phytophagous. Seeking to deepen into the knowledge of the diversity of wasps in the city of Bogotá and their ecological interactions, in this study the diversity of wasps associated with three native and three exotic species frequently in urban parks of the city was evaluated. In total, 22 wasp families and 227 morphospecies were identified. The families Bethylidae, Chalcididae and Crabronidae are recorded for the first time in Bogotá. On the other part, the families Eulophidae, Ichneumonidae and Braconidae were the ones that contributed with the most richness and abundance in this study. Regarding their association with the evaluated plant species, a greater diversity of morphospecies associated with native tree species was found, however, there is an effect of the taxonomic identity and the factor park on the results that are discussed. It highlighting the importance of conserving the native urban flora in green spaces of Bogota’s city, in order to maintain and preserve the diversity of wasps principally with parasitoid and predator habits and thus enhance their role as natural biocontrol agents of insects that affect the health of urban trees, at the same time that ecological processes and functionality of this urban ecosystem would be stimulated.

scholarly journals Vroča točka v mestu: povezava ekosistemskih storitev in biotske pestrosti mestnih zelenih površin

2017 ◽  
Vol 109 (1) ◽  
pp. 111
Author(s):  
Špela Železnikar ◽  
Klemen Eler ◽  
Marina Pintar
Keyword(s):  
Ecosystem Services ◽  
Plant Species ◽  
Green Infrastructure ◽  
Positive Relationship ◽  
Green Space ◽  
Field Analysis ◽  
Green Areas ◽  
The Relationship ◽  
The City

Green areas in cities and their ecosystem services (ES) offer residents various benefits. The range of services depends on biodiversity of a green space. The aim was to determine the relationship between biodiversity in different categories of green areas in the city and the ecosystem services, which appear in it. We made 108 relevés in the autumn and spring time, within nine categories of green areas in the Municipality of Ljubljana. In each category the range of ES was assessed based on field analysis and compared with literature assessed ecosystem services. Results showed that the category of forests differ from others. Other categories were similar to each other, in particular grassland categories. Also, a positive relationship linkage was found - more plant species mean more assessed ecosystem services in a specific green infrastructure category.

scholarly journals Re-Interpreting the Imrahor Valley (Ankara-Turkey) in Terms of Green Infrastructure Directing Urban and Rural Development

2020 ◽  
Vol 23 (2) ◽  
pp. 87-95
Author(s):  
Nilgül Karadeniz ◽  
Esra Şenoz Orsan ◽  
Rüveyda Akman Taskin ◽  
Zekiye Cetinkaya
Keyword(s):  
Green Infrastructure ◽  
Effective Means ◽  
Urban Ecosystems ◽  
Capital City ◽  
Ecological Processes ◽  
Rapid Urbanization ◽  
Metropolitan City ◽  
Rural And Urban ◽  
Urban Rural ◽  
The City

AbstractThe earth is rapidly urbanizing. One of the most effective means of dealing with the emergency caused by rapid urbanization is green infrastructure now. Ankara as a metropolitan capital city is also rapidly losing its urban-rural integrity due to rapid urbanization. Although different spatial plans have been made since the declaration of the Republic, the city continued oil-stain expansion and the green area system could not be protected. The Imrahor Valley, which is of ecologically vital importance in the urban-rural integrity, is one of the valuable areas under threat. The valley is an ecotone between the rural and urban ecosystems, southeast of Ankara city center. The valley has come to the point of losing its natural and rural character, especially with the urban transformation practices on the valley floor, slopes and surrounding areas. In this context, the ecological processes to which the Imrahor Valley is connected and dependent and human interventions in these processes are examined in three layers at different levels initially: the province, the city containing the central districts and the basin containing Lake Mogan-Eymir Lake-Imrahor Valley. Then, we focus on the transformation of the Imrahor Valley, one of the most important ecological components of the metropolitan city of Ankara, between 2003–2020. All transformational interventions in the Imrahor Valley affect all natural processes of the Valley irreversibly. It is necessary to re-read and interpret the Imrahor Valley landscape within the framework of the green infrastructure approach in all spatial planning studies and plan changes to be made regarding the metropolitan city.

Thematic structure of the GIS database Khabarovsk city protected areas

2020 ◽  
Vol 961 (7) ◽  
pp. 56-64
Author(s):  
G.Y. Morozova ◽  
I.D. Debelaia
Keyword(s):  
Sustainable Development ◽  
Protected Areas ◽  
Green Infrastructure ◽  
Ecological Framework ◽  
Thematic Structure ◽  
City Area ◽  
Gis Database ◽  
The City

Protected areas are key elements of the green infrastructure and ecological framework of cities. They have multifunctional significance as centers of investment attractiveness. The percentage of protected zones in the city’s total area is an indicator of its sustainable development. Their total area in Khabarovsk is 567.8 ha (1.5% of the city area)

Toward A Framework for Assessing the Fair Distribution of Space in Urban Streets

2021 ◽  
pp. 036119812199519
Author(s):  
Gabriel Lefebvre-Ropars ◽  
Catherine Morency ◽  
Paula Negron-Poblete
Keyword(s):  
Green Infrastructure ◽  
Supply And Demand ◽  
Active Transportation ◽  
Three Dimensions ◽  
Urban Context ◽  
Urban Streets ◽  
Street Space ◽  
The World ◽  
Fair Distribution ◽  
The City

The increasing popularity of street redesigns highlights the intense competition for street space between their different users. More and more cities around the world mention in their planning documents their intention to rebalance streets in favor of active transportation, transit, and green infrastructure. However, few efforts have managed to formalize quantifiable measurements of the balance between the different users and usages of the street. This paper proposes a method to assess the balance between the three fundamental dimensions of the street—the link, the place, and the environment—as well as a method to assess the adequation between supply and demand for the link dimension at the corridor level. A series of open and government georeferenced datasets were integrated to determine the detailed allocation of street space for 11 boroughs of the city of Montréal, Canada. Travel survey data from the 2013 Origine-Destination survey was used to model different demand profiles on these streets. The three dimensions of the street were found to be most unbalanced in the central boroughs of the city, which are also the most dense and touristic neighborhoods. A discrepancy between supply and demand for transit users and cyclists was also observed across the study area. This highlights the potential of using a distributive justice framework to approach the question of the fair distribution of street space in an urban context.

scholarly journals A Digital Framework to Predict the Sunshine Requirements of Landscape Plants

2021 ◽  
Vol 11 (5) ◽  
pp. 2098
Author(s):  
Heyi Wei ◽  
Wenhua Jiang ◽  
Xuejun Liu ◽  
Bo Huang
Keyword(s):  
Solar Radiation ◽  
Plant Species ◽  
Large Scale ◽  
Normal Growth ◽  
Adaptive Selection ◽  
Landscape Plant ◽  
Landscape Plants ◽  
The Stability ◽  
Stability And Accuracy ◽  
The City

Knowledge of the sunshine requirements of landscape plants is important information for the adaptive selection and configuration of plants for urban greening, and is also a basic attribute of plant databases. In the existing studies, the light compensation point (LCP) and light saturation point (LSP) have been commonly used to indicate the shade tolerance for a specific plant; however, these values are difficult to adopt in practice because the landscape architect does not always know what range of solar radiation is the best for maintaining plant health, i.e., normal growth and reproduction. In this paper, to bridge the gap, we present a novel digital framework to predict the sunshine requirements of landscape plants. First, the research introduces the proposed framework, which is composed of a black-box model, solar radiation simulation, and a health standard system for plants. Then, the data fitting between solar radiation and plant growth response is used to obtain the value of solar radiation at different health levels. Finally, we adopt the LI-6400XT Portable Photosynthetic System (Li-Cor Inc., Lincoln, NE, USA) to verify the stability and accuracy of the digital framework through 15 landscape plant species of a residential area in the city of Wuhan, China, and also compared and analyzed the results of other researchers on the same plant species. The results show that the digital framework can robustly obtain the values of the healthy, sub-healthy, and unhealthy levels for the 15 landscape plant species. The purpose of this study is to provide an efficient forecasting tool for large-scale surveys of plant sunshine requirements. The proposed framework will be beneficial for the adaptive selection and configuration of urban plants and will facilitate the construction of landscape plant databases in future studies.

scholarly journals Green infrastructure in high-rise residential development on steep slopes in city of Vladivostok

2018 ◽  
Vol 33 ◽  
pp. 01004 ◽  
Author(s):  
Alla Kopeva ◽  
Olga Ivanova ◽  
Olga Khrapko
Keyword(s):  
Urban Design ◽  
Green Infrastructure ◽  
Green Roofs ◽  
Residential Development ◽  
The Sustainable Development ◽  
High Rise ◽  
The World ◽  
Green Walls ◽  
Steep Slopes ◽  
The City

The purpose of this study is to identify the facilities of green infrastructure that are able to improve living conditions in an urban environment in high-rise residential apartments buildings on steep slopes in the city of Vladivostok. Based on the analysis of theoretical sources and practices that can be observed in the world, green infrastructure facilities have been identified. These facilities meet the criteria of the sustainable development concept, and can be used in the city of Vladivostok. They include green roofs, green walls, and greening of disturbed slopes. All the existing high-rise apartments buildings situated on steep slopes in the city of Vladivostok, have been studied. It is concluded that green infrastructure is necessary to be used in new projects connected with designing and constructing of residential apartments buildings on steep slopes, as well as when upgrading the projects that have already been implemented. That will help to regulate the ecological characteristics of the sites. The results of the research can become a basis for increasing the sustainability of the habitat, and will facilitate the adoption of decisions in the field of urban design and planning.

Heavy Metals In Soils And Plants Of Urban Ecosystems (On the Example of the City of Yoshkar-Ola)

2017 ◽  
pp. 111-128
Author(s):  
Olga l. Voskresenskaya ◽  
Elena A. Alyabysheva ◽  
Elena V. Sarbayeva ◽  
Vladimir S. Voskresenskiy
Keyword(s):  
Heavy Metals ◽  
Urban Ecosystems ◽  
The City ◽  
Heavy Metals In Soils
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