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.
Residential gardens serve as vital urban green spaces, offering sanctuaries for urban biodiversity. Our study aimed to investigate the impact of urbanization on the floral diversity of residential gardens in the coastal city of Rize. We classified plant species into native, non-native, and cultivated natural taxa and examined diversity patterns among species with distinct dispersal abilities. Our findings revealed a high frequency of non-native taxa in residential gardens, representing the predominant plant structures. Across 53 sample plots encompassing 150 residential gardens, we recorded 616 species from 120 families. Herbaceous plants accounted for the majority, comprising 74.4% of the total. The Asteraceae family emerged as the most frequently encountered, with 58 different taxa. Commelina communis L. was the most common native plant, while Camellia sinensis L. represented nonnative species, and Brassica oleracea L. var. viridis stood as the cultivated natural taxon. The diversity analyses were elucidated through the utilization of Shannon and Simpson's indices, while the regression analysis examined its variation in relation to the degree of urbanization. Our study exhibited various patterns of plant diversity across different levels of urbanization in the coastal city of Rize. We observed a positive relationship between the degree of urbanization and the diversity of woody plant species. While urbanization generally leads to a decrease in the abundance of herbaceous plant species, it exhibits different patterns in different sections. Through our investigation of the relationship between urbanization and plant diversity in residential gardens, we have gained valuable insights that can guide the development of effective strategies to conserve and sustain this critical biodiversity within urban environments.
Türkiye bitki çeĢitliliği açısından oldukça zengin bir doğal bitki örtüsüne sahiptir. Yüksek çeĢitlilikteki doğal bitki örtüsü içerisinde yer alan birçok ağaç, çalı ve otsu karaktere sahip bitki türleri bulunmaktadır. Doğal bitki türleri bulundukları coğrafyada kullanıldıklarında yöre koĢullarına en iyi adapte olabilen türler olmaktadırlar. Peyzaj mimarlığı uygulamalarında bakım maliyetlerinin azaltılması, sağlıklı bir bitki dokusu sağlanması, yerel çevreye uyum, çevre kalitesinin iyileĢtirilmesi gibi nedenlerle doğal türlerin kullanılması büyük önem taĢımaktadır. Türkiye'de özellikle doğal kaynak yönetimleri açısından yaĢam birliktelikleri son derece önem kazanmaya baĢlamıĢtır. Özellikle Batı Karadeniz bölgesi gerek içermiĢ olduğu tür zenginliği ve gerekse de yaĢam birliktelikleri çeĢitliliği ile dikkat çekmektedir. Bu çalıĢmada Düzce Kent Merkezi çevresinde envanteri çıkarılmıĢ olan endemik bitki türleri mevsimsel olarak gözlemlenmiĢ ve bu bitkilerin estetik ve fonksiyonel yönden kentsel alanlarda yapılacak olan peyzaj tasarımlarında değerlendirilme olanakları saptanmıĢtır.
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