Seasonal dynamics of range expansion in South American thrushes.

ABSTRACT:

Background

Species ranges are shaped by a variety of ecological and environmental factors that are inherently dynamic, fluctuating in response to climatic, biotic, and anthropogenic influences. Dispersal plays a key role in range shifts, allowing species to adapt to changing habitats and exploit new regions. In this study, we examined the dispersal processes of four thrush species (Turdus amaurochalinus, T. chiguanco, T. falcklandii and T. rufiventris) that have expanded their ranges in recent decades, with a focus on the interaction between spread and seasonal movements.

Methods

We collected eBird records from 2003 to 2023 to create heat maps that illustrate changes in densities of reported occurrences between seasons and over the years. We also evaluated how bioclimatic an

SUBMITTER: Vazquez MS 

PROVIDER: S-EPMC11827139 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature