Tracking Urban Expansion Using Random Forests for the Classification of Landsat Imagery (1986–2015) and Predicting Urban/Built-Up Areas for 2025: A Study of the Kumasi Metropolis, Ghana

Frimpong, Bernard Fosu; Molkenthin, Frank

doi:10.3390/land10010044

Cited by 21 publications

(15 citation statements)

References 39 publications

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“…However, despite these contributions of UGS, they are under threat due to population growth (Vargas-Herna ´ndez and Zdunek-Wielgołaska 2021) coupled with other urban activities such as farming, and construction (Ives et al 2016;Norton et al 2016). Population growth hence has effects on land-use/land cover and biodiversity (Frimpong and Molkenthin 2021;Elmhagen et al 2015). The conversion of land-use/land cover types (e.g.…”

Section: Introductionmentioning

confidence: 99%

Vegetation attributes drive the taxonomic richness and functional composition of beetles and spiders in mountainous urban green spaces

Damptey

Frimpong

Debrah

et al. 2022

Energ. Ecol. Environ.

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Urban green spaces (UGS) enhance the quality of life in urban environments and serve as habitat corridors or refuge for organisms, including beetles and spiders. The attributes of UGS allow them to harbour species that offer essential ecosystem services. However, the ability of UGS to provide services is limited by the extent to which they have been altered anthropogenically. We described the taxonomic richness and functional composition of arthropods in a mountainous urban ecosystem of Ghana by focussing on the activity of both beetles and spiders at the family level. Two main land-use types (woodlands and built-up areas) were identified and characterised based on the presence or absence of certain vegetation attributes. Sixteen plots in each land-use type with sizes 20 × 20 m were demarcated and fitted with four pitfall traps in each plot to sample continuously for eight weeks, the activity density of both beetles and spiders. Samples were sorted into families and functional groups (detritivores, fungivores, herbivory and predators). The taxonomic richness and activity density were both significantly higher in the woodlands than in the built-up areas. Similarly, all functional groups showed a higher affinity to the woodlands than the built-up areas. Habitat attributes defined by plant diversity and structural complexity were the underlying drivers explaining the differences in arthropod communities between the land-use types. Though the built-up areas seem degraded and open, the remaining small vegetation patches still support the activities of some taxa that should merit the protection of such remnant vegetation in urban ecosystems.

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Section: Introductionmentioning

confidence: 99%

Vegetation attributes drive the taxonomic richness and functional composition of beetles and spiders in mountainous urban green spaces

Damptey

Frimpong

Debrah

et al. 2022

Energ. Ecol. Environ.

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“…It gives an impact to land cover change due to the need for housing and economical related actions. As Frimpong (2021) there are transformation of various Land Use Land Cover (LULC) types into urban/built-up areas due to rapid urbanization. Enoguanbhor (2019) has also mentioned that a signi cant contributor to land cover change is a rapid urban expansion.…”

Section: Introductionmentioning

confidence: 99%

Vegetation Cover Change and Its Diversity in Urban Areas of Medan

Zaitunah¹,

Samsuri²,

Sahara³

2021

Preprint

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Vegetation plays an important role in maintaining the environmental quality of urban areas. Increase in population and development of cities has led to land conversion with lesser vegetated areas. Land cover change analysis in urban areas is needed, especially for urban regional planning with green open space consideration. This research was conducted to analyze urban vegetation cover and its changes in two sub-districts of Medan between the years 1999 and 2019. Normalized difference vegetation index (NDVI) and change analysis were conducted in the research. The diversity of plant within this areas was observed. The results showed changes in vegetation cover areas in the mentioned years. In 1999, most of the areas were under a highly dense vegetation class while in 2019, they were under a low-density vegetation class. This indicates a decrease in vegetation cover due to changes to non-vegetation cover or land cover areas with less vegetation. There are a diverse of plants within the area such as paddy, cassava, corn etc and also many tree species. It is recommended to optimize the land by replanting in the area with no or less vegetation to maintain the environmental quality.

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“…It gives an impact to land cover change due to the need for housing and economic-related actions. As [8] said, there are transformations of various Land Use Land Cover (LULC) types into urban/built-up areas due to rapid urbanization. A significant contributor to land cover change is rapid urban expansion [9].…”

Section: Introductionmentioning

confidence: 99%

“…Many research used the image for land use land cover detection and change analysis in remote sensing and GIS application. Those research are including urban growth monitoring [7,8,13,14,15,16,17,18,19,20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Mapping and assessment of vegetation cover change and species variation in Medan, North Sumatra

Zaitunah

Samsuri

Sahara

2021

Heliyon

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Vegetation existence contributes to environmental quality in urban areas. The increase in population and development of cities has led to land conversion with lesser vegetated areas. Information on land cover change is needed, especially for urban regional planning with green open space consideration. The research aims to analyze urban vegetation cover and its changes in two sub-districts of Medan between the years 1999 and 2019. Normalized difference vegetation index (NDVI) and change analysis were conducted in the research. The diversity of plants within these areas was observed. The results showed changes in vegetation cover areas in the mentioned years. In 1999, most areas were under a highly dense vegetation class, while in 2019, they were under a lowdensity vegetation class. This finding indicates a decrease in vegetation cover as a result of increasing built-up areas. Within the vegetation cover, it was found many tree species and agricultural plants. Those vegetations existed in some areas: city parks, house yards, gardens, agricultural fields, etc. A special emphasis should be placed on riverside areas with less vegetation in order to provide a higher level of protection, particularly in the event of a flood. To increase the vegetated areas and maintain the environmental quality, optimizing the land by replanting in the area with no or less vegetation should be done.

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Tracking Urban Expansion Using Random Forests for the Classification of Landsat Imagery (1986–2015) and Predicting Urban/Built-Up Areas for 2025: A Study of the Kumasi Metropolis, Ghana

Cited by 21 publications

References 39 publications

Vegetation attributes drive the taxonomic richness and functional composition of beetles and spiders in mountainous urban green spaces

Vegetation attributes drive the taxonomic richness and functional composition of beetles and spiders in mountainous urban green spaces

Vegetation Cover Change and Its Diversity in Urban Areas of Medan

Mapping and assessment of vegetation cover change and species variation in Medan, North Sumatra

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