Impact of water-deficit stress on tritrophic interactions in a wheat-aphid-parasitoid system
| Autor: | Jean-Christophe Simon, Deguang Liu, Syed Suhail Ahmed |
|---|---|
| Přispěvatelé: | Northwest A&F University, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, 31572002, National Natural Science Foundation of China, Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Life Cycles Physiology Biodiversité et Ecologie lcsh:Medicine 01 natural sciences Parasitoid sitobion avenae Sitobion avenae Natural Resources Medicine and Health Sciences lcsh:Science Triticum Trophic level Aphid Multidisciplinary Dehydration Ecology Eukaryota food and beverages Plants Trophic Interactions Insects Community Ecology Physiological Parameters Parasitism puceron Wheat Water Resources Research Article interaction tritrophique Arthropoda Biology Research and Analysis Methods 010603 evolutionary biology interaction plante aphide Biodiversity and Ecology Animals Ecosystem Grasses Nymph Molecular Biology Techniques Molecular Biology stress hybride parasitoïde lcsh:R Ecology and Environmental Sciences fungi Organisms Biology and Life Sciences biology.organism_classification Invertebrates Nymphs 010602 entomology Species Interactions Agronomy 13. Climate action Seedlings Aphids aphidius lcsh:Q Adaptation [SDE.BE]Environmental Sciences/Biodiversity and Ecology Cloning Developmental Biology |
| Zdroj: | PLoS ONE PLoS ONE, 2017, 12 (10), ⟨10.1371/journal.pone.0186599⟩ Plos One 10 (12), . (2017) PLoS ONE, Public Library of Science, 2017, 12 (10), ⟨10.1371/journal.pone.0186599⟩ PLoS ONE, Vol 12, Iss 10, p e0186599 (2017) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0186599⟩ |
| Popis: | International audience; Increasing temperature and CO2 concentrations can alter tritrophic interactions in ecosystems, but the impact of increasingly severe drought on such interactions is not well understood. We examined the response of a wheat-aphid-parasitoid system to variation in water-deficit stress levels. Our results showed that arid area clones of the aphid, Sitobion avenae (Fabricius), tended to have longer developmental times compared to semiarid and moist area clones, and the development of S. avenae clones tended to be slower with increasing levels of water-deficit. Body sizes of S. avenae clones from all areas decreased with increasing water-deficit levels, indicating their declining adaptation potential under drought. Compared to arid area clones, moist area clones of S. avenae had a higher frequency of backing under severe water stress only, but a higher frequency of kicking under well-watered conditions only, suggesting a water-deficit level dependent pattern of resistance against the parasitoid, Aphidius gifuensis (Ashmead). The number of S. avenae individuals attacked by the parasitoid in 10 min showed a tendency to decrease with increasing water-deficit levels. Clones of S. avenae tended to have lower parasitism rates under treatments with higher water-deficit levels. The development of the parasitoid tended to be slower under higher levels of water-deficit stress. Thus, the bottom-up effects of water-deficit stressed plants were negative on S. avenae. However, the top-down effects via parasitoids were compromised by water-deficit, which could favor the growth of aphid populations. Overall, the first trophic level under water-deficit stress was shown to have an indirect and negative impact on the third trophic level parasitoid, suggesting that parasitoids could be increasingly vulnerable in future warming scenarios. |
| Databáze: | OpenAIRE |
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