SPU – service relationships
{"Image DocumentName": "SPU \u2013 service relationships", "Image ImageDescription": "Native species. Exotic species. Human alternative. Given this, a series of curves can be envisaged that plot how changes in service provider dynamics or anthropogenic alternatives impact on a particular outcome (e.g. control of pests). We are particularly interested in the shape of the curve (or portion of the curve) related to service provision by native organisms as this illustrates the extent of their contribution and is most relevant to the relationship between the protection of ecosystem services and biodiversity conservation. In the first two examples shown here (a and b), native or native and exotic organisms contribute the entire service at the desired level and can be classified as SPUs. In the second two examples (c and d), native or exotic organisms do not provide the entire service (a human-derived alternative is required to meet service beneficiary needs \u2013 e.g. biocontrol + pesticide), but we may still wish to quantify the extent of the contribution and its form (e.g. a threshold relationship in the last example) and in some cases organisms may be classified as SPUs if their contribution has measurable benefits to service beneficiaries. d. Service provider dynamics.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}