How will global change affect plant reproduction? A framework for mast seeding trends

Area of Science:

• Forest ecology
• Plant reproductive biology
• Global change science

Background:

• Traditional forest ecology research emphasizes plant growth and survival.
• Seed production, a critical demographic process, lacks a robust framework for assessing global change impacts.
• Masting, characterized by synchronized annual variations in seed production within populations, complicates predictions of plant reproductive responses.

Purpose of the Study:

• To develop a framework for understanding how global change affects seed production in forest ecosystems.
• To identify proximate mechanisms influencing seed production patterns in perennial plants.
• To predict future trends in masting behavior under changing environmental conditions.

Main Methods:

• Review and synthesis of proximate mechanisms governing seed production patterns in perennial plants.
• Analysis of ecological factors influencing masting synchrony and seed production variability.
• Identification of knowledge gaps in predicting masting responses to environmental change.

Main Results:

• Seed production is a critical demographic process influenced by masting, which can override simple trends in mean seed production.
• Masting significantly impacts seed predation and pollination dynamics.
• Understanding the mechanisms of predictable seed failure after high-seed years and stochastic synchronization in high-seed years is essential for predicting masting trends.

Conclusions:

• A comprehensive understanding of masting mechanisms is vital for predicting forest ecosystem responses to global change.
• Further research is needed to elucidate the interplay between environmental factors and seed production synchrony.
• Integrating seed production dynamics into ecological models is crucial for accurate forecasting of forest demographics.