Food-web complexity, consumer behavior, and diet specialism: impacts on ecosystem stability

Area of Science:

• Ecology
• Theoretical Ecology
• Network Theory

Background:

• Ecological stability is crucial for food web dynamics, influencing biomass oscillations and species persistence.
• Understanding factors that maintain stability in complex ecological networks is essential for ecosystem management and biodiversity conservation.

Purpose of the Study:

• To investigate the influence of intraspecific consumer interference, network size, connectance, and diet specialism on ecological stability.
• To characterize stability using biomass oscillations and species persistence in generated food web structures.

Main Methods:

• Utilized an Extended Niche model to generate diverse food web structures.
• Analyzed the impact of specific ecological factors on stability metrics like biomass oscillations and species persistence.

Main Results:

• Intraspecific consumer interference was identified as a pivotal factor, with higher interference leading to increased stability.
• Ectotherm vertebrate food webs exhibited greater oscillations compared to invertebrate-based webs.
• Larger and more connected food webs generally showed reduced biomass oscillations.

Conclusions:

• Ecological stability is shaped by a complex interplay of factors, notably intraspecific consumer interference.
• Findings provide insights into maintaining biodiversity and managing ecosystems effectively.
• The study highlights the importance of considering consumer interactions in ecological network stability.