How does land use affect the architecture of plant-insect interactions in managed grasslands?

土地利用集约化导致物种的丧失，但也改变了系统发育，从而改变了社区的功能组成。了解影响群落系统发育和功能组成的因素对于预测土地利用的变化将如何影响生态系统的功能十分重要。在拟议的项目中，我们将分析系统发育的多样性和结构的三个营养群体（植物，食草动物和捕食者）在当地草地社区在土地利用集约化梯度在德国（生物多样性exploratories：Schorfheide-Chorin，Hainich-Dün，Schwäbische Alb）。分子序列和超树算法将用于构建每个地方社区的系统发育树。这些数据将被用来探讨以下问题：（1）土地利用集约化是否会导致植物，食草动物和捕食者群落的系统发育同质化？(2)营养类群间的相互作用是否影响当地群落的系统发育多样性？我们的研究结果将提供重要的见解社区如何组装和土地利用集约化如何改变当地社区的系统发育组成。因此，预期结果将是朝着可靠理解生物多样性与生态系统功能之间关系迈出的重要一步。

Land use intensification leads to a loss of species but also alters the phylogenetic and thus the functional composition of communities. An understanding of the factors that influence the phylogenetic and functional composition of communities is important to forecast how changes in land use will affect ecosystems functioning. In the proposed project we will analyse the phylogenetic diversity and structure of three trophic groups (plants, herbivores and predators) in local grassland communities across land use intensification gradients in three regions in Germany (biodiversity exploratories: Schorfheide-Chorin, Hainich-Dün, Schwäbische Alb). Molecular sequences and supertree algorithms will be used to construct phylogenetic trees for each local community. These data will be used to explore the following questions: (1) Does land use intensification cause a phylogenetic homogenisation of plant, herbivore and predator communities? (2) Do interactions among trophic groups influence the phylogenetic diversity of local communities? The results of our study will provide important insights about how communities assemble and how land use intensification changes the phylogenetic composition of local communities. Therefore, the expected results will be an important step towards a reliable understanding of the relationship between biodiversity and functioning of ecosystems.