1. To investigate the structural changes of a food‐web architecture, we considered real data coming from a soil food web in one abandoned pasture with former low‐pressure agriculture management and we reproduced the corresponding ecological network within a multi‐agent fully programmable modeling environment in order to simulate dynamically the cascading effects due to the removal of entire functional guilds.
2. We performed several simulations differing from each other for the functional implications. At the first trophic level, we simulated a removal of the prey, that is, herbivores and microbivores, while at the second trophic level, we simulated a removal of the predators, that is, omnivores and carnivores. The five main guilds were removed either separately or in combination.
3. The alteration in the food‐web architecture induced by the removal of entire functional guilds was the highest when the entire second trophic level was removed, while the removal of all microbivores caused an alteration in the food‐web structure of less than 5% of the total changes due to the removal of opportunistic and predatory species.
4. Omnivores alone account for the highest shifts in time of the numerical abundances of the remaining species, providing computational evidence of the importance of the degree of omnivory in the stabilization of soil biota.

中文翻译：

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在无脊椎动物的生物量驱动的生态网络中测试自上而下的级联效应。

1. 为了研究食物网架构的结构变化，我们考虑了来自具有以前低压农业管理的废弃牧场中的土壤食物网的真实数据，并在多代理完全可编程建模环境中复制了相应的生态网络。为了动态模拟级联效果，原因是删除了整个功能行会。
2. 我们在功能上进行了一些互不相同的模拟。在第一个营养级，我们模拟了猎物的去除，即食草动物和微食肉动物，而在第二个营养级，我们模拟了捕食者的去除，即杂食动物和食肉动物。五个主要行会被单独或合并删除。
3. 当去除整个第二营养级时，由去除整个功能行会引起的食物网结构变化最高，而去除所有微生物食入引起的食物网结构变化不到食物营养结构的5％。由于去除了机会性和掠夺性物种而造成的总变化。
4. 仅杂食动物会在剩余物种的数量丰富的时间上产生最大的变化，从而提供了杂食动物程度对土壤生物群稳定的重要性的计算证据。