Article Outline
Glossary
Definition of the Subject
Introduction: Food Web Concepts and Data
Early Food Web Structure Research
Food Web Properties
Food Webs Compared to Other Networks
Models of Food Web Structure
Structural Robustness of Food Webs
Food Web Dynamics
Ecological Networks
Future Directions
Bibliography
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Abbreviations
- Connectance(C):
-
The proportion of possible links in a food web that actually occur. There are many algorithms for calculating connectance. The simplest and most widely used algorithm, sometimes referred to as “directed connectance,” is links per species2 \( { (L/S^{2}) } \), where S 2 represents all possible directed feeding interactions among S species, and L is the total number of actual feeding links. Connectance ranges from ∼ 0.03 to 0.3 in food webs, with a mean of ∼ 0.10 to 0.15.
- Consumer-resource interactions:
-
A generic way of referring to a wide variety of feeding interactions, such as predator‐prey, herbivore‐plant or parasite‐host interactions. Similarly, “consumer” refers generically to anything that consumes or preys on something else, and “resource” refers to anything that is consumed or preyed upon. Many taxa are both consumers and resources within a particular food web.
- Food web:
-
The network of feeding interactions among diverse co‐occurring species in a particular habitat.
- Trophic species (S):
-
Defined within the context of a particular food web, a trophic species is comprised of a set of taxa that share the same set of consumers and resources. A particular trophic species is represented by a single node in the network, and that node is topologically distinct from all other nodes. “Trophic species” is a convention introduced to minimize bias due to uneven resolution in food web data and to focus analysis and modeling on functionally distinct network components. S is used to denote the number of trophic species in a food web. The terms “trophic species,” “species,” and “taxa” will be used somewhat interchangeably throughout this article to refer to nodes in a food web. “Original species” will be used specifically to denote the taxa found in the original dataset, prior to trophic species aggregation.
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Dunne, J.A. (2012). Food Webs. In: Meyers, R. (eds) Computational Complexity. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-1800-9_72
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