Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:These study areas have all been managed in the same way for multiple generations (from the onset of farming in the area) and are dominated by indigenous vegetation (Little et al. 2013), they have also only been utilized as livestock farms (the region is not suitable for 1446 Biodivers Conserv (2015) 24:1443–1471
Category: