Interaction network rewiring and species' contributions to community-scale flexibility

Area of Science:

• Ecology
• Network theory
• Community dynamics

Background:

• Species interaction network architecture is crucial for ecological community stability.
• The dynamic, temporal changes in these networks are often overlooked.
• Understanding network flexibility is key to predicting community persistence.

Purpose of the Study:

• To quantify temporal shifts in predator-prey network architecture.
• To identify species ('network coordinators') that enhance network flexibility.
• To explore the role of network coordinators in buffering community perturbations.

Main Methods:

• Compiled a time-series dataset of 50 spider species and 974 Hexapoda prey.
• Quantified temporal shifts in predator-prey interaction network architecture.
• Developed a framework to identify network coordinator species.

Main Results:

• Significant temporal shifts in network architecture were observed.
• Spider species varied in their contributions to network flexibility.
• Detritivorous prey species act as key nodes for interaction rewiring, linking below- and above-ground dynamics.
• Interactions involving network coordinators differ from static network analyses.

Conclusions:

• Network coordinator species are vital for maintaining ecological community stability and resilience.
• Identifying network coordinators offers a new approach to understanding species coexistence.
• This framework aids in prioritizing species for conservation and ecosystem restoration.