Nutrient scarcity as a selective pressure for mast seeding.

Area of Science:

• Ecology
• Evolutionary Biology
• Plant Science

Background:

• Mast seeding, a synchronized mass flowering and seeding event, is a widespread reproductive strategy in plants.
• While potentially costly to individual fitness, its prevalence suggests significant evolutionary advantages.
• Understanding the ecological drivers of mast seeding is crucial for plant reproductive ecology.

Purpose of the Study:

• To investigate the relationship between masting behavior and plant nutrient status.
• To test if masting is more common in species with low foliar nitrogen (N) and phosphorus (P) concentrations.
• To explore the link between the evolution of masting and nutrient economy strategies.

Main Methods:

• Utilized a global dataset of seed production time series for 219 plant species.
• Controlled for local climate and productivity variables.
• Analyzed foliar N and P concentrations and N/P ratios in relation to masting intensity.

Main Results:

• Masting intensity was significantly higher in plant species with low foliar N and P concentrations.
• Species with imbalanced N/P ratios exhibited particularly strong masting.
• The evolutionary history of masting is linked to nutrient economy strategies.

Conclusions:

• Mast seeding is more pronounced in plant species experiencing nutrient-limiting conditions.
• This reproductive trait likely evolved as an adaptation to cope with nutrient limitations and imbalances.
• Nutrient availability is a key factor shaping plant reproductive strategies.