Table 2.
Example levels of ecosystem functioning (arbitrary units) in monoculture (Mijk) and mixture (Yijk) for species i at time j and place k that would produce each of the six types of biodiversity effects. Biodiversity effects are quantified using E10 in Box 3, assuming equal initial proportions RYE,ijk = 0.5 for all i, j and k. In all cases shown, total complementarity effects and total selection effects are simply the sum of local effects: and
Case 1 |
Case 2 |
Case 3 |
Case 4 |
Case 5 |
Case 6 |
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Time (j) | Place (k) | Species (i) | Mijk | Yijk | Mijk | Yijk | Mijk | Yijk | Mijk | Yijk | Mijk | Yijk | Mijk | Yijk |
1 | 1 | 1 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 75 | 50 | 100 | 50 |
1 | 1 | 2 | 50 | 0 | 50 | 0 | 50 | 0 | 50 | 0 | 75 | 50 | 50 | 50 |
1 | 2 | 1 | 100 | 100 | 100 | 100 | 50 | 0 | 50 | 0 | 75 | 50 | 100 | 50 |
1 | 2 | 2 | 50 | 0 | 50 | 0 | 100 | 100 | 100 | 100 | 75 | 50 | 50 | 50 |
2 | 1 | 1 | 100 | 100 | 50 | 0 | 100 | 100 | 50 | 0 | 75 | 50 | 100 | 50 |
2 | 1 | 2 | 50 | 0 | 100 | 100 | 50 | 0 | 100 | 100 | 75 | 50 | 50 | 50 |
2 | 2 | 1 | 100 | 100 | 50 | 0 | 50 | 0 | 100 | 100 | 75 | 50 | 100 | 50 |
2 | 2 | 2 | 50 | 0 | 100 | 100 | 100 | 100 | 50 | 0 | 75 | 50 | 50 | 50 |
Net biodiversity effect | 100 | 100 | 100 | 100 | 100 | 100 | ||||||||
Total complementarity effects: CEγ | 0 | 0 | 0 | 0 | 100 | 150 | ||||||||
Total selection effects: SEγ | 100 | 100 | 100 | 100 | 0 | −50 | ||||||||
-Non-random overyielding | 0 | 0 | 0 | 0 | 0 | −50 | ||||||||
-Total insurance | 100 | 100 | 100 | 100 | 0 | 0 | ||||||||
• Average selection | 100 | 0 | 0 | 0 | 0 | 0 | ||||||||
• Temporal insurance | 0 | 100 | 0 | 0 | 0 | 0 | ||||||||
• Spatial insurance | 0 | 0 | 100 | 0 | 0 | 0 | ||||||||
• Spatiotemporal insurance | 0 | 0 | 0 | 100 | 0 | 0 |