Biodiversity is decreasing at an alarming rate, and there is an urgent need to understand the demographic drivers behind population declines. Therefore, it is important to study the different stages of a species’ life cycle, including adult survival and productivity. It is still poorly understood whether adult survival or productivity has a stronger role in population change, and how the role of adult survival and productivity...

Phenological plasticity—the ability of organisms to adjust the timing of life‐history events in response to environmental variability—is the primary adaptive mechanism for many organisms to changing seasonality (e.g., earlier spring). By enabling alignment between life‐history events and resource availability, it helps to maintain fitness despite changing environmental conditions. Theory predicts that phenological plasticity s...