Predictions of primate-parasite coextinction

Area of Science:

• Ecology
• Conservation Biology
• Parasitology

Background:

• Biodiversity loss poses a significant threat to intricate ecological associations, particularly between hosts and parasites.
• Nearly half of all primate species face extinction, raising concerns about the cascading effects on their associated parasite communities and ecosystem stability.

Purpose of the Study:

• To analyze the structure of primate-parasite interaction networks and predict the impact of threatened primate extinctions on parasite diversity.
• To assess the potential for secondary extinctions of parasites and the subsequent effects on ecological network integrity.

Main Methods:

• Constructed a host-parasite interaction network encompassing 213 primate species and 763 parasite species.
• Simulated the extinction of 114 threatened primate species by removing them from the network.
• Analyzed changes in network structure, connectance, modularity, nestedness, and robustness following simulated extinctions.

Main Results:

• The extinction of threatened primates could lead to the loss of connections for 23% of primate parasite species (176 species).
• Threatened hosts exhibit fewer parasite interactions compared to non-threatened hosts, leading to varied impacts on network structure.
• Host extinctions are predicted to perturb the host-parasite network, potentially triggering secondary parasite extinctions.

Conclusions:

• Primate extinctions will significantly disrupt host-parasite networks, with potential for substantial parasite loss.
• The ecological ramifications of these predicted secondary extinctions require further investigation.
• Understanding network structure is crucial for predicting the consequences of biodiversity loss on host-parasite associations.