On the Myths of Indicator Species: Issues and Further Consideration in the Use of Static Concepts for Ecological Applications
Figure 2
Abundance of Ampharete baltica in relation to bottom salinity and organic sediment content in three sea areas.
The relative bubble size indicates the density of the species with smallest dots referring to species absence and largest bubble size to ca. 1700 ind/m2. Note that the symbol shading used in Figures 2, 3 and 5 is not consistent as different issues are shown.