Abstract
Thanks to their recreational and psychological functions as well as plant diversity, open and green spaces in a city improve the life quality of the urban inhabitants. Woody plant diversity has significant value in urban green systems. The main purpose of this study was to determine the biodiversity values and the potential of the urban green infrastructure via floristic and spatial analyses of woody plant diversity. To this aim, field studies were carried out on the open and green infrastructure in selected areas of Duzce, having different spatial characteristics. The contribution of the identified species to urban biodiversity was examined as well as the spatial characteristics of the species in terms of landscape architecture. In this study, both statistical analyses (alpha and beta diversity of the species) and GIS analyses (species density and spatial distribution) were carried out. According to the results of the research, the most common of the 173 plant species detected were Cupressocyparis leylandii and Tilia tomentosa, found in the open green areas. As a result of the study, it was found that using the floristic diversity indices and GIS jointly enabled the UFD (Urban Floristic Diversity) of the city to be defined both statistically and positionally.
Highlights
Plant diversity is important in predicting the biodiversity for the entire ecosystem [2]; in this study, we focused on the spatial variation in woody plant diversity
3.2 Results of data evaluation on Geographic Information System (GIS) environment According to the results of the analysis, the density of the point data obtained from the sample areas was determined according to the species, families, seasonal conditions and phenological properties of the species; The most common species in the sample areas was Cupressocyparis leylandii (Hybrid Cypress), followed by Rosa sp. and Tilia tomentosa (Silver Linden) (Figure 5A)
Species represented by a single individual included Acer platanoides L., Chamaecyparis lawsoniana ‘Columnaris Glauca’, Chamaecyparis pisifera ‘Boulevard’, Corylus avellana, Cupressus sempervirens ‘Pyramidalis’, Cydonia oblonga, Ilex aquifolium ‘Golden Queen’, Juniperus chinensis ‘Pfitzeriana Glauca’, Juniperus communis ‘Compressa’, Kerria japonica, Koelreuteria paniculata, Ligustrum vulgare ‘Aurea’, Philadelphus coronarius, Phoenix canariensis, Platanus occidentalis, Populus alba, Populus nigra, Prunus avium, Prunus domestica, Pseudotsuga menziesii var
Summary
In spatial diversity for many ecosystems, plant diversity is linked to the heterogeneity of resource availability [1]. The diversity of plants in cities can reflect social, economic, and cultural influences as well as the traditionally described ecological theorems [2]. Urban areas have lost biodiversity in recent years, many plants, including endangered species, can grow and develop in cities [3]. The diversity of woody species in Black Sea cities of Turkey and their environs is quite considerable, with tens of thousands of plant species representing a large source of biodiversity [4]. The temperate zone located around central Turkey is an attractive field in terms of plant diversity and features a great biogeography of genes that are different from those of many countries. No special interest has been shown in this wealth
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