The association strength of landscape composition and spatial structure governs occurrence of invasive Eurasian collared-doves and expanding woodpigeons in a Mediterranean urban environment
2022
Eddajjani, A. | Hanane, S. | Kandry, A El | Qninba, A.
CONTEXT: Understanding the mechanisms governing the selection of habitats by urban expanding species to inform population control. OBJECTIVES: We aimed to determine the effects of landscape composition, human disturbance, and spatial structuring on the occurrence of invasive Streptopelia decaocto (EUCD) and expanding Columba palumbus (EWP) in the city of Rabat, Morocco. METHODS: In 2021, presence-absence data of EUCD and EWP were collected at 666 point locations. Generalized linear mixed models (GLMM) were used to identify the factors associated with EUCD and EWP probability of occurrence, while variation partitioning (VP) analyses were performed to assess the importance of landscape composition, human disturbance, and spatial structure, on the occurrence. RESULTS: The GLMM showed that the probability of EWP occurrence increased with landscape cover of green villa zones, urban parks, and fruit orchards, and declined with average noise intensity and distance to the nearest urban area. The probability of EUCD occurrence exhibited a hump-shaped relationship with the cover of built-up areas and distance to the nearest urban area, a positive association with the extent of urban parks, and a negative correlation with the extent of cereals, distance to the nearest river, and average noise intensity. VP analyses demonstrated that the shared fraction explained by landscape composition and space is doubly more pronounced for the EWP (R² = 0.30) than in EUCD (R² = 0.15). CONCLUSION: Taking into account landscape composition and spatial structure is essential when assessing the adaptation level of bird species in expansion in an urban environment.
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