Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
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| Titel: | Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks |
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| Autoren: | Carla Vázquez‐González, Luis Abdala‐Roberts, Beatriz Lago‐Núñez, Lydia S. Dean, Miquel Capó, Raúl de la Mata, Ayco J. M. Tack, Johan A. Stenberg, Felisa Covelo, Ana Cao, Joana Cursach, Ana Hernández‐Serrano, Finn Hansen, Kailen A. Mooney, Xoaquín Moreira |
| Weitere Verfasser: | University of California-Irvine. USA, Universidad de Extremadura. Departamento de Ingeniería del Medio Agronómico y Forestal, Universidad Autónoma de Yucatán. México, Universidad Politécnica de Madrid, CSIC. Misión Biológica de Galicia (MBG-CSIC), CSIC. Estación Biológica de Doñana (EBD), Stockholm University. Sweden, Swedish University of Agricultural Sciences. Sweden, Universidad Pablo de Olavide, Universitat de les Illes Balears |
| Quelle: | RIO. Repositorio Institucional Olavide Universidad Pablo de Olavide (UPO) |
| Verlagsinformationen: | Wiley, 2024. |
| Publikationsjahr: | 2024 |
| Schlagwörter: | Defensas químicas, 0106 biological sciences, 0301 basic medicine, 2401.23 Vertebrados, Island-mainland comparisons, Island–mainland comparisons, Efectos descendentes, 2417.13 Ecología Vegetal, Vertebrate predators, 2401.02 Comportamiento Animal, Chemical defences, 01 natural sciences, Top-down effects, Comparaciones isla-continente, Interacciones planta-herbívoro, 03 medical and health sciences, Multi-trophic interactions, Interacciones multitróficas, Bottom-up effects, Efectos ascendentes, Plant-herbivore interactions, Depredadores vertebrados, Plant–herbivore interactions |
| Beschreibung: | Ecological theory predicts that herbivory should be weaker on islands than on mainland based on the assumption that islands have lower herbivore abundance and diversity. However, empirical tests of this prediction are rare, especially for insect herbivores, and those few tests often fail to address the mechanisms behind island–mainland divergence in herbivory. In particular, past studies have not addressed the relative contribution of top‐down (i.e. predator‐driven) and bottom‐up (i.e. plant‐driven) factors to these dynamics. To address this, we experimentally excluded insectivorous vertebrate predators (e.g. birds, bats) and measured leaf traits associated with herbivory in 52 populations of 12 oak (Quercus) species in three island–mainland sites: The Channel Islands of California vs. mainland California, Balearic Islands vs. mainland Spain, and the island Bornholm vs. mainland Sweden (N = 204 trees). In each site, at the end of the growing season, we measured leaf damage by insect herbivores on control vs. predator‐excluded branches and measured leaf traits, namely: phenolic compounds, specific leaf area, and nitrogen and phosphorous content. In addition, we obtained climatic and soil data for island and mainland populations using global databases. Specifically, we tested for island–mainland differences in herbivory, and whether differences in vertebrate predator effects or leaf traits between islands and mainland contributed to explaining the observed herbivory patterns. Supporting predictions, herbivory was lower on islands than on mainland, but only in the case of Mediterranean sites (California and Spain). We found no evidence for vertebrate predator effects on herbivory on either islands or mainland in any study site. In addition, while insularity affected leaf traits in some of the study sites (Sweden‐Bornholm and California), these effects were seemingly unrelated to differences in herbivory. Synthesis. Our results suggest that vertebrate predation and the studied leaf traits did not contribute to island–mainland variation patterns in herbivory, calling for more nuanced and comprehensive investigations of predator and plant trait effects, including measurements of other plant traits and assessments of predation by different groups of natural enemies. |
| Publikationsart: | Article |
| Dateibeschreibung: | application/pdf |
| Sprache: | English |
| ISSN: | 1365-2745 0022-0477 |
| DOI: | 10.1111/1365-2745.14444 |
| Zugangs-URL: | https://hdl.handle.net/10433/22008 |
| Rights: | CC BY NC ND |
| Dokumentencode: | edsair.doi.dedup.....ee4b2ab4e2d2bbde39621d90a2c6df32 |
| Datenbank: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | Ecological theory predicts that herbivory should be weaker on islands than on mainland based on the assumption that islands have lower herbivore abundance and diversity. However, empirical tests of this prediction are rare, especially for insect herbivores, and those few tests often fail to address the mechanisms behind island–mainland divergence in herbivory. In particular, past studies have not addressed the relative contribution of top‐down (i.e. predator‐driven) and bottom‐up (i.e. plant‐driven) factors to these dynamics. To address this, we experimentally excluded insectivorous vertebrate predators (e.g. birds, bats) and measured leaf traits associated with herbivory in 52 populations of 12 oak (Quercus) species in three island–mainland sites: The Channel Islands of California vs. mainland California, Balearic Islands vs. mainland Spain, and the island Bornholm vs. mainland Sweden (N = 204 trees). In each site, at the end of the growing season, we measured leaf damage by insect herbivores on control vs. predator‐excluded branches and measured leaf traits, namely: phenolic compounds, specific leaf area, and nitrogen and phosphorous content. In addition, we obtained climatic and soil data for island and mainland populations using global databases. Specifically, we tested for island–mainland differences in herbivory, and whether differences in vertebrate predator effects or leaf traits between islands and mainland contributed to explaining the observed herbivory patterns. Supporting predictions, herbivory was lower on islands than on mainland, but only in the case of Mediterranean sites (California and Spain). We found no evidence for vertebrate predator effects on herbivory on either islands or mainland in any study site. In addition, while insularity affected leaf traits in some of the study sites (Sweden‐Bornholm and California), these effects were seemingly unrelated to differences in herbivory. Synthesis. Our results suggest that vertebrate predation and the studied leaf traits did not contribute to island–mainland variation patterns in herbivory, calling for more nuanced and comprehensive investigations of predator and plant trait effects, including measurements of other plant traits and assessments of predation by different groups of natural enemies. |
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| ISSN: | 13652745 00220477 |
| DOI: | 10.1111/1365-2745.14444 |