Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert
Although ontogeny influences dietary composition and trophic niche breadth in many anurans, its effects on diet have been little analyzed in sympatric species. In this study, we analyzed interspecific and ontogenetic variation in dietary composition and trophic niche width in an anuran community fro...
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| Format: | Article |
| Language: | English |
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PeerJ Inc.
2019-10-01
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| Series: | PeerJ |
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| Online Access: | https://peerj.com/articles/7908.pdf |
| _version_ | 1797425679661268992 |
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| author | Ricardo Luría-Manzano Aurelio Ramírez-Bautista |
| author_facet | Ricardo Luría-Manzano Aurelio Ramírez-Bautista |
| author_sort | Ricardo Luría-Manzano |
| collection | DOAJ |
| description | Although ontogeny influences dietary composition and trophic niche breadth in many anurans, its effects on diet have been little analyzed in sympatric species. In this study, we analyzed interspecific and ontogenetic variation in dietary composition and trophic niche width in an anuran community from a semi-arid environment. We found a more profound effect of species identity than body size on dietary composition, with the diet of four species dominated by formicids, that of two others by coleopterans and formicids, and that of the remaining species not dominated by specific prey types. We found ontogenetic changes in dietary composition in three of four species analyzed, in which consumption of some small insects decreased as predator size increased, regardless of species. Additionally, we did not find ontogenetic change in prey number consumed in any of the four species, but prey size increased with increasing predator size in all of them. Most species exhibited a narrow trophic niche, which was even narrower in adults in three of the four species analyzed. Costello’s modified plots revealed a high variation among individuals in termite consumption in Anaxyrus punctatus, and in more prey types in Spea multiplicata. Our results suggest that this community is not size-structured, and that ontogenetic diet shifts are mainly caused by passive sampling toward prey of different sizes. Finally, comparisons with previous data revealed an interpopulation pattern, in which trophic niche width contracts as aridity increases, possibly because of an increase in interspecific competition for trophic resources. |
| first_indexed | 2024-03-09T08:19:33Z |
| format | Article |
| id | doaj.art-77d803193c5648079f96b4dfd3db4180 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T08:19:33Z |
| publishDate | 2019-10-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-77d803193c5648079f96b4dfd3db41802023-12-02T21:53:25ZengPeerJ Inc.PeerJ2167-83592019-10-017e790810.7717/peerj.7908Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan DesertRicardo Luría-ManzanoAurelio Ramírez-BautistaAlthough ontogeny influences dietary composition and trophic niche breadth in many anurans, its effects on diet have been little analyzed in sympatric species. In this study, we analyzed interspecific and ontogenetic variation in dietary composition and trophic niche width in an anuran community from a semi-arid environment. We found a more profound effect of species identity than body size on dietary composition, with the diet of four species dominated by formicids, that of two others by coleopterans and formicids, and that of the remaining species not dominated by specific prey types. We found ontogenetic changes in dietary composition in three of four species analyzed, in which consumption of some small insects decreased as predator size increased, regardless of species. Additionally, we did not find ontogenetic change in prey number consumed in any of the four species, but prey size increased with increasing predator size in all of them. Most species exhibited a narrow trophic niche, which was even narrower in adults in three of the four species analyzed. Costello’s modified plots revealed a high variation among individuals in termite consumption in Anaxyrus punctatus, and in more prey types in Spea multiplicata. Our results suggest that this community is not size-structured, and that ontogenetic diet shifts are mainly caused by passive sampling toward prey of different sizes. Finally, comparisons with previous data revealed an interpopulation pattern, in which trophic niche width contracts as aridity increases, possibly because of an increase in interspecific competition for trophic resources.https://peerj.com/articles/7908.pdfDietary compositionFormicidaeDipteraIntraspecific variationTrophic niche width |
| spellingShingle | Ricardo Luría-Manzano Aurelio Ramírez-Bautista Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert PeerJ Dietary composition Formicidae Diptera Intraspecific variation Trophic niche width |
| title | Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert |
| title_full | Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert |
| title_fullStr | Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert |
| title_full_unstemmed | Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert |
| title_short | Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert |
| title_sort | ontogenetic variation in the diet of the anuran community from a semi arid environment in the southeastern chihuahuan desert |
| topic | Dietary composition Formicidae Diptera Intraspecific variation Trophic niche width |
| url | https://peerj.com/articles/7908.pdf |
| work_keys_str_mv | AT ricardoluriamanzano ontogeneticvariationinthedietoftheanurancommunityfromasemiaridenvironmentinthesoutheasternchihuahuandesert AT aurelioramirezbautista ontogeneticvariationinthedietoftheanurancommunityfromasemiaridenvironmentinthesoutheasternchihuahuandesert |