Shifting spring ephemeral pollination windows under climate change - a three-body problem.

Area of Science:

• Ecology
• Phenology
• Climate Change Biology

Background:

• Phenological mismatches due to climate change disrupt species interactions.
• Species often interact in multiple ways, necessitating a broader analysis of phenological shifts.

Purpose of the Study:

• To analyze the phenology of a spring ephemeral, its specialist pollinator, and canopy closure.
• To assess how climate-driven phenological variations impact pollination windows.
• To understand the consequences of divergent phenological responses across interacting guilds.

Main Methods:

• Synthesized data from natural history collections, community science, and remote sensing.
• Analyzed the phenological timing of flowering plants, insect emergence, and canopy closure.
• Modeled the potential pollination window under climate change scenarios.

Main Results:

• Phenological responses to climate change varied significantly among the studied plant, pollinator, and canopy guilds.
• The potential pollination window is predicted to shift divergently across ecoregions.
• These shifts can negatively affect the fitness and reproductive success of interacting species.

Conclusions:

• Phenological responses to climate change are complex and vary across interacting species guilds.
• Divergent shifts in pollination windows pose risks to ecosystem stability and species persistence.
• Integrating phenological data across multiple guilds is essential for predicting global change impacts.