Dynamic Symbiosis: Avian Response to Rapid Urbanization

Urban green spaces (UGS) cannot fulfil their ecological functions without considering biological responses. Birds serve as sensitive ecological indicators in the process of urbanization. In Yuelai, forests have been rapidly converted into cities over a decade, with several parcels being redeveloped into UGS. Bird communities have greatly suffered due to this transformation. This research investigated the impact of various factors on bird diversity through a field survey of four seasons, collecting data on birds and urban green spaces. We translate research results into specific adaptive strategies for the renewal and management of UGS. This research is expected to provide insights tinto understanding relationships between birds and UGS.

Background

Over the past decade, the Yuelai region has undergone rapid urbanization, with most of its natural areas being converted into urban ones, thereby destroying wildlife habitats and partially transforming them into urban green spaces. The relationship between urban green spaces and wildlife has not been well evaluated. Birds have been proven to be sensitive indicator species of urban ecosystem health. Therefore, in this research, we conducted a field survey covering four seasons to collect data on birds and urban green spaces. Using statistical models, we explored the key factors affecting bird community in urban green spaces. The research results were translated into adaptive strategies for management of urban green spaces in Yuelai. These strategies have been approved by the Yuelai Urban Green Space Management Authority and will be applied to future urban green space renewal. 

This research aims to (1) explore how bird communities have been impacted by urban green spaces, and (2) transform the results into adaptive strategies for the future management of urban green spaces in the Yuelai region.

Methods

(1) Field survey

We conducted a one-year field survey in the Yuelai region, collecting data on birds, vegetation, environment, and disturbances in urban green spaces. First, considering the accessibility and effectiveness of the sampling plots, we identified 49 plots within the urban green spaces. We revisited the plots multiple times across the four seasons of the year to ensure sufficient data.

(2) Statistical Analysis

We used generalized linear models to study the effects of influencing factors on the four bird indices. We compared the differences in bird indices across different seasons and habitat types to better inform adaptive strategies. 

(3) Transforming Research Results into Adaptive Strategies

We transformed the research results into corresponding adaptive strategies. These adaptive strategies were determined based on significant influencing factors and the extensive information collected during the survey on birds, plants, and surroundings. 

Results: Significant factors affecting bird community in urban green spaces

According to the optimal model, significant influencing factors for the four bird indices were identified. Influencing factors can provide a basis and targets for the management of urban green spaces. 

Adaptive Strategies

(1) Vegetation coverage and species adjustment

Based on survey data and statistical analysis results, the coverage of trees, shrubs, and herbs in the habitats requiring renovation is being standardized. 

(3) Mitigating negative impacts

Noise and the distance to construction land have significant negative impacts on bird diversity. We implemented various levels of barriers around different types of roads to reduce noise levels.

(3) List of food-source plants

Based on the seasonal dynamics of bird community and their distribution differences in habitat types, we recommended a list of species for future vegetation modifications. 

Significance

We translated GLMs results into quantifiable and actionable adaptive measures, which, having received approval, will be applied to the renewal and management practices of urban green spaces in the Yuelai region.This study quantified the relationship between urban green spaces and biodiversity, providing applicable strategies for enhancing urban biodiversity and managing urban green spaces.