拓扑特征与经验食物网中 IGP 模块的普遍性有关

IF 3.1 3区 环境科学与生态学 Q2 ECOLOGY
Yijun Ren , Ying Gong , Yue Yu , Xinghao Chen , Langqin Yu , Lei Zhao
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引用次数: 0

摘要

探索食物网是如何由基本模块组合而成的,对于了解群落是如何自我组织的至关重要。作为基本模块之一,群体内捕食(IGP)包括中间捕食者和顶级捕食者同时捕食猎物,前者也被后者捕食(因此包括捕食和竞争)。研究表明,这种互动关系决定着食物网的稳定性,因此也是食物网结构的基础。虽然已有一些研究了解了食物网中普遍存在IGP模块背后的因素和机制,但食物网拓扑结构在这些模块中的具体作用在很大程度上仍未得到探索和深入了解。在这里,我们分析了103个食物网,发现每个食物网中的模块数量在很大程度上取决于分类群的丰富度和连接度。在控制了类群丰富度和连接度之后,经验食物网特定的无尺度模式和核心-外围结构比偶然性更好地解释了经验食物网中IGP模块较高的普遍性。最后,如果失去支持大量IGP模块的类群,食物网的稳健性将受到严重破坏,这表明这些类群在维持食物网结构和稳定性方面起着关键作用。我们的研究结果从IGP模块的角度对经验食物网的组成提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Topological traits are associated with the prevalence of IGP modules in empirical food webs

Exploring how food webs are assembled from basic modules is charming and crucial for understanding how communities are self-organized. As one of the basic modules, intraguild predation (IGP) consists of a prey being consumed by both an intermediate and a top predator, with the former also being consumed by the latter (thus encompassing both predation and competition). This interaction has been shown to govern food web stability, and therefore underpin the organization of network structures. While some studies have been made in understanding the factors and mechanisms behind the prevalence of IGP modules in food webs, the specific role of food web topological structures in relation to these modules remains largely unexplored and is not well understood. Here, 103 food webs were analyzed, and we found that the number of modules in each food web was largely determined by taxon richness and connectance. After controlling richness and connectance, the specific scale-free pattern and core-periphery structure of empirical food webs explains the higher prevalence of IGP modules in empirical food webs better than by chance. Lastly, the loss of taxa which supported large number of IGP modules would lead to serious damage to food web robustness, indicating the keystone role of these taxa in maintaining food web structure and stability. Our results provide new insight into the assembly of empirical food webs from the perspective of IGP modules.

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来源期刊
Ecological Complexity
Ecological Complexity 环境科学-生态学
CiteScore
7.10
自引率
0.00%
发文量
24
审稿时长
3 months
期刊介绍: Ecological Complexity is an international journal devoted to the publication of high quality, peer-reviewed articles on all aspects of biocomplexity in the environment, theoretical ecology, and special issues on topics of current interest. The scope of the journal is wide and interdisciplinary with an integrated and quantitative approach. The journal particularly encourages submission of papers that integrate natural and social processes at appropriately broad spatio-temporal scales. Ecological Complexity will publish research into the following areas: • All aspects of biocomplexity in the environment and theoretical ecology • Ecosystems and biospheres as complex adaptive systems • Self-organization of spatially extended ecosystems • Emergent properties and structures of complex ecosystems • Ecological pattern formation in space and time • The role of biophysical constraints and evolutionary attractors on species assemblages • Ecological scaling (scale invariance, scale covariance and across scale dynamics), allometry, and hierarchy theory • Ecological topology and networks • Studies towards an ecology of complex systems • Complex systems approaches for the study of dynamic human-environment interactions • Using knowledge of nonlinear phenomena to better guide policy development for adaptation strategies and mitigation to environmental change • New tools and methods for studying ecological complexity
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