Clonal integration in Fragaria chiloensis differs between populations: ramets from grassland are selfish

Area of Science:

• Ecology
• Plant Biology
• Evolutionary Biology

Background:

• Clonal plants can share resources between genetically identical units (ramets).
• Resource sharing strategies may be influenced by habitat uniformity or patchiness.
• Previous models suggest resource sharing is disadvantageous in uniform habitats and advantageous in patchy ones.

Purpose of the Study:

• To test the hypothesis that clonal plants from uniform habitats have lower resource sharing rates than those from patchy habitats.
• To investigate genetically based variation in resource sharing in Fragaria chiloensis populations.
• To determine if resource sharing patterns are locally selected.

Main Methods:

• Comparing resource sharing in Fragaria chiloensis from uniform grassland and patchy dune habitats.
• Manipulating light levels and ramet connections to assess biomass accumulation.
• Analyzing patterns of biomass accumulation under different resource sharing conditions.

Main Results:

• Fragaria chiloensis ramets from grassland populations exhibited lower resource sharing rates compared to those from dune populations.
• Biomass accumulation patterns supported the prediction of "selfish" ramets in uniform habitats.
• This study provides evidence for genetically based variation in resource sharing among clonal plants.

Conclusions:

• Resource sharing patterns in clonal plants are likely subject to local selection pressures.
• Adaptation of resource sharing strategies enhances plant performance in diverse habitats.
• This research is the first to report genetically based variation in resource sharing in clonal plants.