Ecological interactions are fundamental in ecological pest management, and these interactions form networks. The properties of these networks, where interactions of all possible nature (positive, neutral, negative) coexist, are key for management, but little is known about them. The main reasons for this lack of knowledge are the difficulties in obtaining empirical evidence. These problems may be partially bypassed using a theoretical approach. Here, by means of mathematical models that represent networks of ecological interactions in agroecosystems, we characterize some architectural features that promote the self-regulation of population densities in these networks. The results show that the key features are: spatial heterogeneity and a high proportion of positive interactions.

生态相互作用是生态害虫管理的基础，这些相互作用形成网络。这些网络的属性是所有可能的性质（正，中性，负）相互作用共存的属性，是管理的关键，但对其知之甚少。缺乏知识的主要原因是难以获得经验证据。使用理论方法可以部分绕开这些问题。在这里，借助于代表农业生态系统中生态相互作用网络的数学模型，我们描述了一些促进这些网络中人口密度自我调节的建筑特征。结果表明，关键特征是：空间异质性和高比例的正向相互作用。