Factors responsible for forest and water bird distributions in rivers and lakes along an urban gradient in Beijing

Xie, Shilin; Wang, Xiaoke; Ren, Yangang; Su, Zhimin; Su, Yuebo; Wang, Siqi; Zhou, Weiqi; Lu, Fei; Qian, Yuguo; Gong, Cheng; Huang, Binbin; Ouyang, Zhiyun

doi:10.1016/j.scitotenv.2020.139308

Cited by 21 publications

(9 citation statements)

References 68 publications

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“…The extensive dataset that we obtained revealed highly resolved fish community compositions at fine spatial scales and thus enabled a robust assessment of fish diversity responses to environmental parameters, thereby providing unprecedented insight into the complexity of the effects of urbanization on aquatic biodiversity. Of all WQIs tested, the COD was the most influential factor on native fish diversity, particularly in lentic waters, whereas impervious surface and vegetation cover, the two most influential urbanization factors shaping the distribution of bird diversity ( 38 ) and land insect diversity ( 11 , 39 ), showed little effect on fish diversity. Unexpectedly, the relative sequence abundance of non-native fishes increased along the city-rural gradient in lotic waters.…”

Section: Discussionmentioning

confidence: 98%

“…1 ), acquired using ArcGIS 10.3 ( 77 ), were extracted from a 1-km radius area surrounding each sampling location, and each of those values was calculated as the proportion of the relevant land cover type to total terrestrial area (excluding water areas). The 1-km radius was selected on the basis of previous research on correlations between urban or human impact and biodiversity ( 38 , 78 ). Land cover data extracted within a 500-m radius area surrounding each sampling location were also analyzed following the same procedures, and we found highly consistent values for each land cover type with those of the 1-km radius area.…”

Section: Methodsmentioning

confidence: 99%

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Environmental DNA captures native and non-native fish community variations across the lentic and lotic systems of a megacity

et al. 2022

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Globally, urbanization poses a major threat to terrestrial biodiversity, yet its impact on fish diversity is poorly understood, mainly because of surveying difficulties. In this study, environmental DNA metabarcoding was used to survey fish communities at 109 lentic and lotic sites across Beijing, and how environmental variables affect fish biodiversity at fine urban spatial scales was investigated. We identified 52 native and 23 non-native taxa, with lentic and lotic waters harboring both common and habitat-specific species. Water quality strongly affected native fish diversity, especially in lentic systems, but had little influence on non-native diversity. Fish diversity showed little response to urban land cover variation, but the relative sequence abundance of non-natives in lotic waters increased linearly with distance from the city center. Our findings illustrate the complex effects of urbanization on native versus non-native fishes in different aquatic habitats and highlight the distinctive considerations needed to conserve urban aquatic biodiversity.

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Section: Discussionmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Environmental DNA captures native and non-native fish community variations across the lentic and lotic systems of a megacity

et al. 2022

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“…The distance from the urban centre indicated the pattern in which resources were distributed along the urbanisation gradient. Generally, the closer to the city centre, the higher the urbanisation [ 3 , 47 , 48 ]. We found that terrestrial birds and waterbirds appeared less frequently in more urbanised reaches during our survey.…”

Section: Discussionmentioning

confidence: 99%

“…Our study statistically depicted the urbanisation gradient with the assistance of a valid land-use/land-cover (LULC) classification. Generally, we selected different habitat patches to represent the urbanisation gradient compared with the other urbanisation studies, in which the definition of ‘urbanisation intensity’ may be more statistically accurate [ 47 , 48 ]. The results of the RDA showed that the urbanisation intensity had a significant impact on river wetland birds in all four seasons [ 10 , 32 ].…”

Section: Discussionmentioning

confidence: 99%

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Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Zhou

Xia

et al. 2022

Animals

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Urbanisation is known to result in ‘urban stream syndrome’, which poses a huge threat to the river health. Birds, which are an important part of the river ecosystem, are sensitive to environmental changes in the basin. The ratio of the impervious surface area is a macroscopic indicator of urbanisation intensity in river basins. In this study, we combined the results of a year-round field survey of seven river wetlands around Chaohu Lake (China) with satellite remote sensing image data from the same period. The species richness at sections of the lake entrance was higher than in the middle sections of the river, and the Shannon–Wiener index during autumn was higher than that during winter. The waterbird diversity index declined exponentially with increases in the intensity of urbanisation. The changes in the land use patterns around river wetlands associated with urbanisation resulted in the loss of food resources and habitats. Therefore, the intensity of urbanisation was an important driving factor that leads to changes in the bird community structure of river wetlands, so it had a significant impact on the diversity of river wetland birds in all four seasons combined with a variety of influencing factors. Our research could be a guide for urban landscape planning and bird diversity protection. For example, the results suggested that it is necessary to identify river wetlands as an important part of the urban ecosystem, reduced building area, increased vegetation coverage, and retained slope protection and river beach land.

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Landscape context and wetland attributes influence wintering waterbirds in important bird and biodiversity areas: implications for conservation and management

Hamza,

Abdi,

Chokri

et al. 2024

Landsc Ecol

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Context The intensification and expansion of human activities have caused profound changes in global wetlands and their associated aquatic bird communities. Understanding the mechanisms that drive the spatial assemblages of wetland birds is important for the development of effective conservation and management strategies. Objectives The overall objective was to evaluate the influence of wetland features such as size and distance to the nearest coastline, and landscape composition, configuration, and function in shaping waterbird richness and abundance in 43 Tunisian Important Bird and Biodiversity Areas (IBAs). Methods Systematic waterbird surveys on species abundance and richness at each IBA were carried out between December and January in 2020/2021 and 2021/2022. Satellite remote sensing indices were used to map wetlands and characterize the vegetation condition in the landscape surrounding them. Landscape metrics were used to describe the habitat configuration around the wetlands. Results Our results show that landscape composition, configuration and function have significant effects on waterbirds (i.e., shorebirds, waterfowl, wading birds, and open-water birds). We found that wetland surface area and distance to the coast were important factors influencing the richness and abundance of waterbirds. Our results also indicate that landscape diversity is an important predictor of waterbird richness and abundance, and that there is a significant interaction between wetland surface area and distance to the nearest wetland in explaining the richness and abundance of waterbirds. Conclusions This study provides evidence that the richness and abundance of waterbirds are robustly dependent on the interaction between wetland surface area and distance to the nearest wetland. Furthermore, local wetland characteristics (wetland surface area and distance to the nearest coastline), landscape composition (forest area and urban area), landscape configuration (spatial heterogeneity), and landscape function (maximum and minimum NDVI), significantly affect wintering waterbird communities. This study also highlights the importance of large and connected wetlands in conserving various bird communities in Tunisian IBAs and provides recommendations for their conservation and sustainable management.

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Factors responsible for forest and water bird distributions in rivers and lakes along an urban gradient in Beijing

Cited by 21 publications

References 68 publications

Environmental DNA captures native and non-native fish community variations across the lentic and lotic systems of a megacity

Environmental DNA captures native and non-native fish community variations across the lentic and lotic systems of a megacity

Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Landscape context and wetland attributes influence wintering waterbirds in important bird and biodiversity areas: implications for conservation and management

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