The EuroCES provides invaluable long-term monitoring of bird populations and their demography. They also provide a unique opportunity for researchers to ask a wide range of questions about how birds respond to environmental change. Some of the most recent scientific papers published using CES data are highlighted below. For a list of all publications click here.
Thermal constraints on body size depend on the population position within the species’ thermal range in temperate songbirds.
Dubos, N., Dehorter, O., & Henry, P.-Y. & Le Viol, I. (2019). Global Ecology and Biogeography 28:96-106 (https://doi.org/10.1111/geb.12805)
There is mounting evidence that climate warming can induce morphological changes locally, particularly size reduction. However, the direction of thermal stress may differ between climatic regions. We predicted that morphological response to temperature fluctuations should vary throughout species ranges, depending on the local climate. Hot temperature anomalies are expected to induce size reduction in hot regions where species live close to their upper thermal limit, whereas size stasis (or increase) would be expected in cold regions, where species live close to their lower thermal limit. We tested whether the effect of temperature anomalies on juvenile body size varied along an 11 °C thermal gradient. In warmer springs, juveniles were larger overall at the coldest sites, but this effect decreased toward the hottest sites, becoming negative for two species. Warming should induce body size increases more frequently at the cold edge of species distribution ranges, and rather body size declines at the hot edg. The climate dependency of the effect of weather fluctuations on body size is still under‐acknowledged, and the pattern identified deserves to be investigated over broader climatic gradients and taxonomic coverage. Climate‐driven changes in body size are therefore not uniform across climatic regions and within species ranges.
High intra-specific variation in avian body condition responses to climate limits generalisation across species.
McLean, N; van der Jeugd, H.P.; van de Pol, M. (2018). PLoS ONE 13: e0192401. (https://doi.org/10.1371/journal.pone.0192401)