Table 2 Environmental suitability and production for seaweed in Japan estimated using the production-environmental suitability model
Year | Environmental suitability | Production | Ratio of decreased percentage of production to decreased percentage of environmental suitability (%) | ||||
|---|---|---|---|---|---|---|---|
Estimated value | Decreased value | Decreased percentage (%) | Estimated value (ton) | Decreased value (ton) | Decreased percentage (%) | ||
1990 | 2.103 | – | – | 205,857 | – | – | – |
1997 | 0.875 | 1.229 | 58.4 | 141,475 | 64,382 | 31.3 | 53.5 |
2004 | 0.555 | 0.319 | 36.5 | 108,156 | 33,319 | 23.6 | 64.5 |
2011 | 0.459 | 0.096 | 17.3 | 95,321 | 12,835 | 11.9 | 68.7 |