Fig. 2From: What is the effect of giving the grazers access to additional nutrient sources on biodiversity in semi-natural pastures? A systematic review protocolConceptual model illustrating how nutrient addition, either by supplementary feeding or by incorporating semi-natural and improved pastures within the same enclosure, might affect biodiversity in semi-natural pastures. Thin arrows indicate possible impact directions. Note that supplementary feeding might impact the nutritional status either directly, via spillage, or indirectly, via manure and urine. The outcomes of the three respective questions are indicated by thick arrows, to elucidate the relations between the P(EC)OsBack to article page