Network-level and group-level bipartite metrics and their definition
Metric | Definition |
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Connectance | The realized proportion of possible links. |
Nestedness | Nestedness temperature of the matrix (0 means cold, i.e. high nestedness, 100 means hot, i.e. chaos). |
NODF | Nestedness measure based on overlap and decreasing fill. High values indicate nestedness. |
Interaction strength asymmetry | The asymmetry in the interaction strength of two interacting species. Negative values indicate that the plants exert a stronger effect on pollinators. |
Specialization asymmetry | Asymmetry (higher vs. lower trophic level) of specialization. Negative values show a higher specialization of the lower trophic level. |
Linkage density | Marginal totals-weighted diversity of interactions per species (quantitative). |
H2 | H2 is a measure of specialization. H2 is between 0 and 1, with 1 indicating maximum specialization. |
Web asymmetry | The balance between numbers in the two levels: positive values indicate higher trophic level species, negative more lower-trophic level species. |
Links per species | Mean number of links per species (qualitative): sum of links divided by number of species. |
Robustness HL | Measure of the robustness of of the system to the loss of higher level (e.g., pollinator). |
Robustness LL | Measure of the robustness of the system to the loss of lower level (e.g., plants). |