Occurrences included

At this point we need to decide how many occurrences of each element to protect. The criteria chosen by the BioMap project are in Table 4.

Table 4: The number of occurrences of different elements to be included in the BioMap.

	Ranks selected
Element rarity	Rare plants	Natural communities
Globally critically imperiled	All occurrences	All occurrences
Globally imperiled	All occurrences	All occurrences
Globally vulnerable	Best occurrences	All occurrences
State critically imperiled	All occurrences	All occurrences
State imperiled	Best occurrences	Best occurrences
State vulnerable	Very best occurrences	Best occurrrences
State secure	Not explicity selected	Very best occurrences