Plant-mediated species networks: the modulating role of herbivore density
Impacte
Scholar |
Altres documents de l'autoria: Pineda, Ana; Soler, Roxina; Pastor, Victoria; Li, Yehua; Dicke, Marcel
Metadades
Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
comunitat-uji-handle4:
INVESTIGACIONAquest recurs és restringit
http://dx.doi.org/10.1111/een.12404 |
Metadades
Títol
Plant-mediated species networks: the modulating role of herbivore densityData de publicació
2017-08Editor
WileyCita bibliogràfica
PINEDA, Ana; SOLER, Roxina; PASTOR FUENTES, María Victoria; LI, Yehua; DICKE, Marcel. Plant-mediated species networks: the modulating role of herbivore density. Ecological entomology (2017), v. 42, issue 4, p. 449-457Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://onlinelibrary.wiley.com/doi/10.1111/een.12404/fullVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
1. When herbivores of distinct feeding guilds, such as phloem feeders and leaf chewers, interact, the outcome of these interactions often shows facilitation. However, whether this facilitation turns into competition ... [+]
1. When herbivores of distinct feeding guilds, such as phloem feeders and leaf chewers, interact, the outcome of these interactions often shows facilitation. However, whether this facilitation turns into competition at stronger herbivory pressure remains unknown.
2. Using an integrative approach that links ecological processes (behavioural choices of insects) with physiological plant mechanisms (nutrient and phytohormone levels) for the wild crucifer Brassica nigra (L.) Koch., this study evaluates preferences of leaf chewers for plants previously infested with several densities of the specialist aphid Brevicoryne brassicae L. (Hemiptera, Aphididae). As leaf chewers, four species of caterpillars (Lepidoptera) were selected that differ in their degree of specialisation in crucifers.
3. These results show that, whereas at low and medium aphid densities caterpillars displayed a preference for aphid-infested plants or no preference, at high aphid infestation density, all four species of caterpillar preferred uninfested plants, with a significant difference for Pieris rapae and Mamestra brassicae.
4. In contrast to our expectation, the consistent preference for uninfested plants at a high aphid density could not be associated with a decrease in plant nutrition. However, while jasmonate concentrations [i.e. 12-oxo-phytodienoic acid and jasmonic acid (JA)] at medium aphid-density infestation decreased compared with low levels of infestation, at high infestation level, the jasmonates JA as well as JA conjugated with the amino acid isoleucine were present at higher levels compared with low-infestation treatments.
5. This work provides evidence that positive interactions observed in herbivore communities can be transient, leading to negative interactions mediated by changes in plant defences rather than in plant nutrition. [-]
Publicat a
Ecological entomology (2017), v. 42, issue 4Proyecto de investigación
1) Netherlands Organization for Scientific Research (NWO) (ALW grant no. 822.01.005 to MD, and VENI grant no. 863.08.028 to RS); 2) Post-doctoral EU Marie Curie Individual Fellowship (no. 234895)Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
Apareix a les col.leccions
- CAMN_Articles [566]