SP7: Interactions between saproxylic insects and consequences for wood decomposition

SP7：腐木昆虫之间的相互作用和木材分解的后果

• 批准号: 461895359
• 负责人: Professorin Dr. Heike Feldhaar
• 金额: --
• 依托单位: Lehrstuhl für Tierökologie I
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/461895359?language=en
• 关键词: SP7; Interactions; between; saproxylic; insects

Dead wood decomposition plays an important role in nutrient cycling. In the tropics, insect contribute greatly to dead wood decomposition. Here predominantly termites, beetles and ants together with fungi drive the decay process in complex interactions. These biotic interactions are not well understood so far. However, since the degradation of tropical forests affects the diversity and abundance of decomposing organisms, the decomposition process should be affected as well. The resilience of these communities in dead wood as well as the potential of reassemby of these communities during recovery of tropical forests is unknown. Here, we aim to investigate the decay of wood and its colonizers along a forest recovery gradient from pastures to secondary forests to primary tropical forests, first in a survey approach and second in an experimental approach where we monitor reassembly processes of dead wood laid out in plots along the forest recovery gradient. Finally, disentangle the effects of soil disturbance as one type of forest interior degradation, the contribution of different taxa (termites, ants, beetles) and their interactions, on the decomposition process, we will conduct an exclusion experiment along the full recovery gradient. In our approaches, we will analyse community reassembly patterns using a network apporach. We will create several networks between host species, fungi, termites, beetles and ants together with the identification of species traits modulating the interactions. Specifically, we aim to characterize the responses of saproxylic communities to forest degradation, to analyse the reassembly of complex networks of saproxylic communities following anthropogenic disturbance, and to quantify the effect of saproxylic communities and their biotic interactions on decomposition rates along the forest recovery gradient in a tropical rainforest.

枯木分解在养分循环中起着重要作用。在热带地区，昆虫对枯木的分解起很大作用。这里主要是白蚁，甲虫和蚂蚁与真菌一起在复杂的相互作用中驱动腐烂过程。迄今为止，这些生物相互作用还没有得到很好的理解。然而，由于热带森林的退化影响到分解生物的多样性和丰富性，分解过程也应受到影响。这些群落在枯木中的复原力以及这些群落在热带森林恢复过程中重新聚集的潜力尚不清楚。在这里，我们的目标是调查木材和它的殖民者沿着森林恢复梯度从牧场到次生林，主要的热带森林，首先在调查的方法，第二次在实验的方法，我们监测重新组装过程中的死木材铺设在地块沿着森林恢复梯度。最后，将土壤扰动作为森林内部退化的一种类型，理清不同类群（白蚁、蚂蚁、甲虫）及其相互作用对分解过程的影响，我们将沿着完全恢复梯度进行排除实验。在我们的方法中，我们将使用网络approach分析社区重组模式。我们将在宿主物种、真菌、白蚁、甲虫和蚂蚁之间建立几个网络，并确定调节相互作用的物种特征。具体而言，我们的目标是描述saperylytic社区对森林退化的响应，分析saperylytic社区的复杂网络的重新组装后的人为干扰，并量化saperylytic社区和它们的生物相互作用对分解率的影响沿着在热带雨林的森林恢复梯度。