Publication Type: | Journal Article |
Year of Publication: | 2010 |
Authors: | E. Gómez-Díaz, González-Solís J. |
Journal: | PLoS ONE |
Volume: | 5 |
Issue: | 5 |
Pagination: | 7pp |
Date Published: | Apr-05-2010 |
Type of Article: | Open access e10454 |
Abstract: | Ecological studies on food webs rarely include parasites, partly due to the complexity and dimensionality of host-parasiteinteraction networks. Multiple co-occurring parasites can show different feeding strategies and thus lead to complex andcryptic trophic relationships, which are often difficult to disentangle by traditional methods. We analyzed stable isotoperatios of C (13C/12C,d13C) and N (15N/14N,d15N) of host and ectoparasite tissues to investigate trophic structure in 4 co-occurring ectoparasites: three lice and one flea species, on two closely related and spatially segregated seabird hosts(Calonectrisshearwaters).d13C isotopic signatures confirmed feathers as the main food resource for the three lice speciesand blood for the flea species. All ectoparasite species showed a significant enrichment ind15N relatively to the host tissueconsumed (discrimination factors ranged from 2 to 5%depending on the species). Isotopic differences were consistentacross multiple host-ectoparasite locations, despite of some geographic variability in baseline isotopic levels. Our findingsillustrate the influence of both ectoparasite and host trophic ecology in the isotopic structuring of theCalonectrisectoparasite community. This study highlights the potential of stable isotope analyses in disentangling the nature andcomplexity of trophic relationships in symbiotic systems. |
URL: | http://dx.plos.org/10.1371/journal.pone.0010454 |
DOI: | 10.1371/journal.pone.0010454 |
Short Title: | PLoS ONE |
Trophic Structure in a Seabird Host-Parasite Food Web: Insights from Stable Isotope Analyses
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