Plant antagonists

为了应对气候变化，欧洲草原越来越受到严重干旱的影响。SP09调查干旱如何影响原生生物植物拮抗剂（卵菌门和植粘菌门），并导致负面的土壤遗产效应依赖于植物多样性。我们的目标是评估i）的时间稳定性，电阻，并恢复这些原生生物植物拮抗剂在干旱响应，ii）如何拮抗剂在植物多样性梯度受干旱胁迫，以及iii）如何结合生物（拮抗剂）和非生物（干旱）应力反馈植物性能与植物多样性的增加。我们的中心假设是，干旱可能会放大负面的土壤遗传效应的植物拮抗剂，特别是在低植物多样性水平。我们设计了四个协调的工作包，以评估i）的社区组成，结构和原生生物拮抗剂的系统发育代表性的变化（正常）的季节变化和极端（炎热干旱）事件和ii）的组合生物和非生物胁迫影响植物生长防御权衡沿着植物多样性梯度。我们的建议将特别有助于总体假设，即植物多样性稳定生态系统功能，长期模式可以通过对干旱的短期反应来预测。

In response to climate change, European grasslands are increasingly affected by severe droughts. SP09 investigates how drought affects protistan plant antagonists (Oomycota and Phytomyxea) and resulting negative soil legacy effects in dependence on plant diversity. Our objectives are to assess i) the temporal stability, resistance, and recovery of these protistan plant antagonists in response to drought, ii) how antagonists in plant diversity gradients are affected by drought stress, and iii) how the combined biotic (antagonists) and abiotic (drought) stresses feedback on plant performance with increasing plant diversity. Our central hypothesis is that drought may amplify negative soil legacy effects by plant antagonists, especially at low plant diversity levels. We designed four coordinated work packages to assess i) changes in the community composition, structure and phylogenetic representation of protistan antagonists as affected by (normal) seasonal variation and extreme (hot drought) events and ii) the combined biotic and abiotic stresses affecting plant growth-defence trade-offs along the plant diversity gradient. Our proposal will particularly contribute to the overarching hypothesis that plant diversity stabilizes ecosystem functioning and that long-term patterns can be predicted by short-term responses to drought.