Table 5.
Estimated values for different ecosystem service functions of Ukhiya and Teknaf Upazilas from 2017 to 2021.
| Ecosystem functions | Sub-types | Ecosystem service value (million US$) |
Changes from 2017 to 2021 |
||
|---|---|---|---|---|---|
| 2017 | 2021 | million US$ | percentage | ||
| Provisioning | Food production | 1.91 | 1.71 | −0.20 | −10.61 |
| Raw material | 3.45 | 2.69 | −0.76 | −21.97 | |
| Regulating | Gas regulation | 0.00 | 0.00 | 0.00 | 0.00 |
| Climate regulation | 3.52 | 2.75 | −0.77 | −21.97 | |
| Disturbance regulation | 0.05 | 0.04 | −0.01 | −21.97 | |
| Water regulation | 27.27 | 30.64 | 3.37 | 12.35 | |
| Water supply | 10.66 | 11.96 | 1.30 | 12.17 | |
| Waste treatment | 5.50 | 5.43 | −0.06 | −1.18 | |
| Supporting | Soil-formation and retention | 0.25 | 0.19 | −0.05 | −21.97 |
| Nutrient cycling | 9.02 | 7.04 | −1.98 | −21.97 | |
| Erosion control | 2.40 | 1.87 | −0.53 | −21.97 | |
| Pollination | 0.16 | 0.17 | 0.00 | 1.21 | |
| Biodiversity | 0.33 | 0.32 | −0.01 | −2.29 | |
| Genetic resources | 0.40 | 0.31 | −0.09 | −21.97 | |
| Culture | Recreation and tourism | 2.85 | 2.62 | −0.23 | −8.09 |
| Cultural | 0.05 | 0.04 | −0.01 | −21.97 | |