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Updated: Oct 19, 2025
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Author Spotlight: Advanced Enteroid Model for Studying Host-Pathogen Interactions
Published on: April 5, 2024
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Spatial variation in species' roles in host-helminth networks
Tad A Dallas1,2, Pedro Jordano3
1Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
Summary
Species roles in host-parasite networks are not conserved across locations. Environmental factors and local communities likely influence these interactions, impacting parasite diversity and dynamics globally.
Area of Science:
- Ecology
- Parasitology
- Macroecology
Background:
- Species interactions, particularly host-parasite relationships, can change across geographic areas due to environmental variations.
- Understanding if and how species maintain their functional roles in ecological networks is crucial for macroecology.
Purpose of the Study:
- To investigate the conservation of species' functional roles within host-helminth parasite networks across diverse geopolitical locations.
- To determine if host and parasite species consistently occupy similar positions and interactions within networks globally.
Main Methods:
- Utilized a global helminth parasite occurrence database and host-helminth interaction data from 299 locations.
- Defined and quantified species' roles in a two-dimensional space based on network linkage patterns.
- Employed both continuous and categorical approaches to assess role conservation.
Main Results:
- No evidence of conserved species' roles was found for any single species among over 38,000 host and helminth parasite species analyzed.
- Both continuous and categorical methods failed to detect significant role conservation.
Conclusions:
- Species' roles in host-helminth networks appear to be highly context-dependent and not conserved across space.
- Spatial and environmental gradients, along with local community composition, likely drive the variability in species' functional roles.
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