Table 1.

Classification scheme of factors selected for systematic review

Case characteristics	Levels
Publication journal and year
Grain size	classified into six categories: (0, 1], (1, 10], (10, 100], (100, 500], (500, 1,000] and (1,000) m2
Country
Study area within country
Geographic coordinates	midpoint of study area (latitude, longitude)
Spatial extent	(0, 10), [10, 100), [102, 103), [103, 104), [104, 105), [105, 106) and [106) km2
Research type	observational or experimental
Habitat type	forest, grassland, shrubland, wetland, riparian, savanna, agricultural habitat (refers to the non‐crop semi‐natural areas in an agricultural landscape), urban, many habitat types included in study, and miscellaneous other habitats (e.g., freshwater, old fields)
Climatic zone	tropical, temperate, or polar