schemas/VegCore/VegCore.ERD.mwb: individual_count: inherit from taxon_presence because this is also a type of taxon_observation (and specifically, a taxon_presence), in addition to the general taxon_presence it's associated with. it is possible e.g. for different diameter classes to be counted by different collectors, and thus to need separate taxon_observations to store the different collectors.
schemas/VegCore/VegCore.ERD.mwb: individual_count: inherit from taxon_presence because this is also a type of taxon_observation (and specifically, a taxon_presence), in addition to the general taxon_presence it's associated with. it is possible e.g. for different diameter classes to be counted by different collectors, and thus to need separate taxon_observations to store the different collectors.