Multivariate climatic effects and declining avian populations in an alkaline grassland complex

A study on the Hortobágy National Park, Europe's largest unbroken alkaline steppe, reveals that avian population dynamics are significantly influenced by multivariate climatic factors. Researchers found that long-distance migratory bird species experiencing population growth in the region were affected by milder climatic conditions induced by the North Atlantic Oscillation (NAO) and increasing Sahel rainfall trends. Short-distance migrants showed population growth in response to warming winters. However, several key conservation species exhibited negative population trends with unknown causes, highlighting the complexity of climate effects on avian populations. The study underscores the need for a nuanced understanding of these climatic influences to develop effective conservation strategies that avoid misattribution of success or failure.

Végvári, Z., & Barta, Z. (2016). Multivariate climatic effects and declining avian populations in an alkaline grassland complex. Climate Research, 68(1), 39–48. https://doi.org/10.3354/cr01372