How do urban green space designs shape avian communities: Optimizing distribution, size and shape.

Area of Science:

• Urban ecology
• Conservation biology
• Landscape ecology

Background:

• Birds are key indicators of urban ecological health and biodiversity.
• Urban green spaces are crucial for biodiversity conservation but their fragmented nature poses challenges.
• The specific influence of green space characteristics on bird species diversity remains unclear.

Purpose of the Study:

• To investigate the relationship between urban green space morphology and bird species diversity.
• To analyze how area, shape, and configuration of green spaces affect bird abundance and richness.
• To provide a framework for optimizing urban green spaces for bird conservation.

Main Methods:

• Used Morphological Spatial Pattern Analysis (MSPA) to characterize green space morphology.
• Applied Fragstats to calculate landscape pattern indices.
• Employed boosted regression tree (BRT) models to analyze bird abundance responses to green space patterns and island ecology theory.

Main Results:

• Found significant nonlinear relationships between bird richness and green space area, shape, and configuration.
• Green space area and shape were identified as key predictors of bird abundance.
• Larger, more regular green spaces and a minimum core area proportion of 20% were linked to higher bird richness, with a 20 ha threshold observed.

Conclusions:

• Urban green space characteristics, particularly area and shape, are critical for supporting bird diversity.
• Different bird guilds (resident vs. migratory) respond to distinct landscape features.
• Optimizing urban green space design based on these findings can enhance urban biodiversity and ecological health.