The scope and extent of literature that maps threats to species globally: a systematic map

Table 5 The methods used to map the spatial occurrence of threats to species

Type	Method	Number of Articles using each method/data source for each question component
Type	Method	Population	Outcome (Threat)
Primary Collection	Survey	346	292
	Expert Elicitation	49	75
	Remote Sensing	172	237
Secondary Collection	Database	261	330
Secondary Collection	Literature	164	160
Primary Synthesis	Modelled	119	221
Secondary Synthesis	Pre-calculated Metric (or PCHBA)	77	17
Secondary Synthesis	Protected Area	160	–
	Other	5	9

PCHBA, pre-calculated high biodiversity area (e.g. Biodiversity Hotspots [20] or Key Biodiversity Areas [111])

ISSN: 2047-2382