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Öğe Bird diversity along a riparian corridor in a moderate urban landscape(Elsevier, 2020) Keten, Akif; Eroglu, Engin; Kaya, Sertac; Anderson, James T.Civilization built around rivers directly affects riparian corridor structure and ecology. Degradation, pollution, and deterioration along riparian corridors in urban landscapes change species composition and biodiversity. Birds are one of the most vulnerable taxa to ecological changes. The main objective of our study was to spatially compare bird species richness, abundance, and community structure along the Asar River, an urban riparian corridor in Duzce, Turkey. We identified 63 bird species, comprising 6722 individuals, and classified them into one of three groups: generalist species (11 species), woodland species (40 species), and waterbird species (12 species). Bird species richness was positively related to vegetative cover and negatively to urbanization. Richness was low in the winter and was higher during spring and summer. Riparian Quality Index (RQI) scores (mean = 54.8 +/- 33.7; max. = 97 and min. = 5) were relatively low for all sampling plots and was reduced by human activities (e.g., roads, farmland, settlement). The number of woodland bird species changed positively (r = 0.71) with RQI. The generalist bird species, adapted to urbanization, were more common around settlements and open areas. Human population and settlement around Asar River increased one-third and farmland and natural habitat decreased onefifth during the last decade. The area has high potential for growth and increased urbanization, thus increasing the pressure on the natural areas. Activities that diminish the amount of tree cover in the riparian corridor should be avoided. Habitat restoration and rehabilitation will increase RQI values, which can be used as indicators for bird richness in urban landscapes and benefit avian diversity along the riparian corridor. The existing riparian corridor and any enhancements to the corridor will help conserve Duzce's biodiversity in the future.Öğe Determination the natural plant compositions and species distribution model in different habitat types of Duzce (Turkiye)(Univ Federal Lavras-Ufla, 2025) Kaya, Sertac; Eroglu, Engin; Basaran, Nermin; Aytegin, Ahmet; Donmez, Abdullah HuseyinBackground: Turkiye is a very rich country in terms of the distribution and diversity of plants. Despite these current conditions, natural plant species are not sufficiently used in designing urban landscapes. The research aims to reveal an ecological model approach to urban planting by determining the ecological indicator values (EIV's) and coexistence in nature of the species detected in the natural vegetation, revealing the potential of plants to come together. Results: Within the scope of research, natural areas in Duzce Plain and at the points touching the plain were determined according to the CORINE land cover classification, and 5 different habitat types were determined as forest habitat, riparian areas, rocky habitat, wetlands and meadow habitat. In this study, 420 plant taxa belonging to 89 families which were taken from 33 points and 168 sample areas, were identified. Both natural plant species determined by collecting plant species from the area and plant species diversity will be revealed by determining the ecological demands of the plants. After determining whether the coexistence of plant species collected and identified in these habitat types is distributed in an interdependent manner, scenarios regarding the coexistence of plants were constructed with the help of the latent variables model (LVM's) by R software program. Conclusion: Some of the plant species with the highest percentage of presence according to the plant layers were selected, and plant compositions with high coexistence were proposed according to the LVM's.Öğe The effects of urbanization on species richness and floristic diversity in residential gardens(Springer, 2025) Dogan, Tuba Gul; Demirci, Sena; Eroglu, Engin; Corbaci, Omer Lutfu; Kaya, Sertac; Meral, AlperenUrbanization is recognized as a major driver reshaping plant diversity patterns globally; however, ecological responses to urbanization are highly site-specific and often diverge from generalized assumptions. This study investigates how urbanization influences plant species richness and Shannon diversity within residential gardens across an urban-to-rural gradient in Rize, Turkey-a rapidly urbanizing region along the Black Sea coast-thereby addressing a critical knowledge gap and challenging generalized assumptions commonly held in urban ecology. Field surveys across 150 residential gardens documented 603 plant taxa from 120 families, revealing critical patterns of biodiversity change under varying urbanization levels. Non-native species comprised 57% of the total taxa, highlighting their dominance in residential gardens across different urbanization intensities. Herbaceous species richness declined significantly in highly urbanized zones (F (2,27) = 10.35, p < 0.001), whereas non-native species richness exhibited a pronounced increase (+ 57%), particularly in areas with urbanization levels exceeding 55%. Woody species richness, however, remained relatively stable across urbanization gradients. Interestingly, moderately urbanized areas displayed the highest diversity indices (Shannon_H: 4.32), reflecting a transitional ecological dynamic consistent with the intermediate disturbance hypothesis. By contrast, areas with low urbanization (4.16) and high urbanization (4.26) exhibited reduced biodiversity, with native species showing the steepest declines in highly urbanized zones. Although urbanization is often associated with biodiversity loss, this paradigm warrants reevaluation in light of the observed increase in overall Shannon diversity driven by adaptable non-native species. Therefore, urban biodiversity management strategies should transcend generalized assumptions, addressing the complex interplay of native and non-native species dynamics across varying urbanization gradients.Öğe Gray Water Conditions on the Growth of Some Natural Ground Cover Plants and the Water Quality of Plants(Aves, 2024) Kaya, Sertac; Kaya, Melek Yilmaz; Coban, Omer Faruk; Turan, Fatma; Ozgen, Nisa; Eroglu, EnginClimate change and high water consumption driven by population growth have led to water stress, affecting over 2 billion people worldwide yearly. In the face of scarce water resources, traditional sewage infrastructure, especially during extreme weather, can not handle the water load and leads to pollution in freshwater sources. Treatment of rainwater and graywater can be considered a potential water source to minimize freshwater consumption and enhance water sustainability, offering simple solutions in cities. Recently, the ability of plants to remove toxic metals from dirty waters through their roots have been utilized and then water reused. In this study, a small-scale domestic graywater treatment system was developed under greenhouse conditions as a nature-based solution. In the selection of plants, species naturally distributed in D & uuml;zce province, aquatic, riparian, and understory species were preferred. Plants in the system were supplied with graywater and stored. The plants' purification levels and growth status under polluted water stress were examined. According to the results the amount of anionic substances in stored water, Asplenium scolopendrium L. was observed to have the highest treatment performance among the species. Although Lythrum salicaria L. and Carex pendula Huds. had a lower value compared to other species, they were shown to be a usable species in graywater treatment. Nasturtium officinale R. BR. had a low treat-ment value and was found to be a pollution-resistant species. As a result, the reuse of water is essential in today's conditions where climate zones and species distributions are changing. As seen in this study; Although species from natural vegeta-tion have different purification potentials, they offer the opportunity to be used to purify gray water.
