Evaluating the Ecological Restoration Effectiveness of Poverty Alleviation Relocation through Carbon Storage Analysis: Insights from Karst Regions
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Experimental Methods
2.2.1. Forest Biomass Survey
2.2.2. Experimental Methods
2.2.3. Correlation Analysis
3. Results
3.1. Overall Change Trends
3.2. Temporal and Spatial Evolution of Carbon Storage
3.3. Relationship between PAR and Carbon Storage
3.4. Impact of PAR on Carbon Storage at Different Distances from Affected Forest Areas
4. Discussion
5. Conclusions
- (1)
- The results of this study reveal a significant improvement trend in the forest ecosystem of the study area from 2015 to 2021. During this period, there was a notable increase in forest land area by 7.89% and carbon storage by 6.57%. The total carbon storage in the forest ecosystem of the study area was 48.19 million tons before the implementation of the Poverty Alleviation and Relocation (PAR) policy in 2015. After PAR implementation in 2021, the total carbon storage increased to 51.35 million tons, marking a gain of 3.17 million tons and a growth rate of 6.57% across the three typical townships.
- (2)
- After the implementation of PAR, the increase in carbon storage was most significant in rocky desertification areas, followed by karst areas, with no noticeable impact in non-karst areas. Following PAR implementation in the three typical townships, in the desertification-prone township of Angu, carbon storage increased by 13,626 tons, representing a growth of 14.31%. The Pearson correlation coefficient, calculated at a significance level where p < 0.05, indicates a significant correlation (coefficient: 0.948) between PAR households and carbon storage variables. In the karst township of Fuyan, carbon storage increased by 8787 tons, showing a growth rate of 4.34%. The Pearson correlation coefficient, also significant (coefficient: 0.838), suggests a noteworthy correlation between PAR households and carbon storage variables. In the non-karst township of Wangfeng, carbon storage increased by 9242 tons, with a growth rate of 5.01%. However, the Pearson correlation coefficient (coefficient: 0.284) between PAR households and carbon storage variables did not exhibit a significant correlation.
- (3)
- Post-PAR implementation, the forest ecosystem’s carbon storage demonstrated different trends based on proximity to the relocation point, and the farther the area is from the relocation point, the more pronounced the increase in forest carbon storage. Within 200 m of the PAR relocation point, carbon storage decreased by 1065 tons, representing a reduction of 0.59%. In the 200–500 m range, carbon storage increased by 10,301 tons, showing a growth rate of 7.64%. Within the 500–1000 m range, carbon storage increased by 13,108 tons, reflecting a growth rate of 11.51%. Beyond 1000 m from the relocation point, carbon storage increased by 9561 tons, indicating a growth rate of 18.24%.
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Study Area | Total Area (km2) | Registered Population (Individuals) | Cultivated Land (Hectares) | Ecological Conditions | PAR | ||
---|---|---|---|---|---|---|---|
Karst | Rocky Desertification | Household | Individuals | ||||
Angu | 101.99 | 21.55 | 1000 | 70.59% | 36.92% | 933 | 4317 |
Fuyan | 164.52 | 20.53 | 1530 | 96.81% | 9.82% | 577 | 2065 |
Wangfeng | 98.69 | 15.64 | 750 | 0 | 0 | 671 | 2698 |
Dominant Tree Species | Biomass Expansion Factor | Wood Basic Density | Root-to-Shoot-Ratio | Carbon Content |
---|---|---|---|---|
Masson Pine | 1.8763 | 0.4482 | 0.1886 | 0.5271 |
Cunninghamia lanceolata | 1.8611 | 0.3071 | 0.2338 | 0.5127 |
Broadleaf Deciduous Forest | 1.8451 | 0.4222 | 0.2175 | 0.4536 |
Broadleaf Evergreen Forest | 1.7127 | 0.6062 | 0.215 | 0.4822 |
Oak–Hickory Forest | 1.7609 | 0.6119 | 0.2424 | 0.4798 |
Cupressus funebris Endl | 1.8064 | 0.2893 | 0.2277 | 0.5331 |
Liquidambar formosana Hance | 2.6871 | 0.644 | 0.2148 | 0.4502 |
Betula spp. | 1.8082 | 0.527 | 0.27 | 0.4914 |
Paulownia | 1.8855 | 0.4754 | 0.2218 | 0.6811 |
Area | Dominant Tree Species | 2015 | 2021 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Area (hm2) | DHB (cm) | Age of Class | Canopy Closure | Height of Tree | Area (hm2) | DHB (cm) | Age of Class | Canopy Closure | Height of Tree | ||
Wangfeng | Masson Pine | 2550.89 | 15.56 | 2 | 0.51 | 1.26 | 2778.33 | 16.15 | 2 | 0.51 | 1.31 |
Cunninghamia lanceolata | 3201.02 | 10.82 | 3 | 0.43 | 0.99 | 3381.09 | 10.29 | 3 | 0.43 | 0.99 | |
Broadleaf Deciduous Forest | 183.6 | 16.2 | 2 | 0.58 | 0.81 | 271.98 | 12.36 | 2 | 0.49 | 0.72 | |
Broadleaf Evergreen Forest | 21.34 | 10.4 | 2 | 0.45 | 1.31 | 43.1 | 8.6 | 2 | 0.45 | 1.31 | |
Camellia sinensis | 92.12 | 158.29 | |||||||||
Sparse Woodland | 48.34 | ||||||||||
Shrubland | 389.25 | 501.41 | |||||||||
Bamboo Thicket | 61 | 75.06 | |||||||||
Total | 6547.56 | 7209.26 | |||||||||
Fuyan | Masson Pine | 573.16 | 7.56 | 1 | 0.45 | 0.83 | 600.84 | 9.2 | 1 | 0.45 | 0.83 |
Cunninghamia lanceolata | 1211.55 | 9.78 | 2 | 0.42 | 0.81 | 1891.13 | 7.8 | 2 | 0.41 | 0.68 | |
Broadleaf Deciduous Forest | 839.54 | 7.85 | 1 | 0.47 | 0.78 | 733.13 | 8.24 | 2 | 0.49 | 0.72 | |
Broadleaf Evergreen Forest | 3913.74 | 6.36 | 1 | 0.51 | 0.51 | 4073.78 | 5.32 | 2 | 0.47 | 0.53 | |
Camellia sinensis | 158.93 | 118.58 | |||||||||
Oak–Hickory Forest | 479.3 | 9.7 | 1 | 0.56 | 0.63 | 440.8 | 10.1 | 1 | 0.58 | 0.63 | |
Cupressus funebris Endl | 93.51 | 7.7 | 1 | 0.43 | 0.65 | 75.94 | 7.5 | 1 | 0.41 | 0.65 | |
Sparse Woodland | 174 | 4.36 | 1 | 0.42 | 0.48 | 175.89 | 4.36 | 2 | 0.42 | 0.48 | |
Shrubland | 1177.94 | 1217.39 | |||||||||
Bamboo Thicket | 1001.63 | 725.11 | |||||||||
Total | 9623.3 | 10,052.59 | |||||||||
Angu | Masson Pine | 257.44 | 15.36 | 2 | 0.53 | 1.18 | 273.03 | 16.21 | 2 | 0.53 | 1.23 |
Cunninghamia lanceolata | 900.44 | 12.5 | 2 | 0.58 | 1.11 | 820.97 | 12.6 | 2 | 0.58 | 1.11 | |
Broadleaf Deciduous Forest | 524.08 | 11.7 | 2 | 0.5 | 0.95 | 926.77 | 7.5 | 2 | 0.5 | 0.95 | |
Oak–Hickory Forest | 351.11 | 14.6 | 3 | 0.66 | 1.23 | 337.87 | 15.1 | 3 | 0.66 | 1.23 | |
Liquidambar formosana Hance | 88.84 | 17.2 | 2 | 0.47 | 1.23 | 96.49 | 17 | 2 | 0.5 | 1.21 | |
Betula spp. | 107.83 | 15.3 | 2 | 0.49 | 1.21 | 97.31 | 17 | 2 | 0.49 | 1.21 | |
Paulownia | 42.36 | 15.9 | 3 | 0.51 | 1.25 | 58.55 | 15.5 | 3 | 0.51 | 1.25 | |
Sparse Woodland | 82.87 | 6 | 1 | 0.5 | 0.5 | ||||||
Shrubland | 2410.03 | 2597.98 | |||||||||
Total | 4682.13 | 5291.84 |
Area | Dominant Tree Species | 2015 | 2021 | Variables | |||||
---|---|---|---|---|---|---|---|---|---|
Area (Hectare) | Carbon Storage (t) | Area (Hectare) | Carbon Storage (t) | Area (Hectare) | Rate (%) | Carbon Storage (t) | Rate (%) | ||
Wangfeng | Masson Pine | 2550.89 | 92,303 | 2778.33 | 99,717 | 227.44 | 8.92% | 7415 | 8.03% |
Cunninghamia lanceolata | 3201.02 | 80,142 | 3381.09 | 80,487 | 180.07 | 5.63% | 345 | 0.43% | |
Broadleaf Deciduous Forest | 183.6 | 5863 | 271.98 | 5627 | 88.38 | 48.14% | −235 | −4.02% | |
Broadleaf Evergreen Forest | 21.34 | 559 | 43.1 | 953 | 21.76 | 101.97% | 393 | 70.34% | |
Camellia sinensis | 92.12 | 846 | 158.29 | 1454 | 66.17 | 71.83% | 608 | 71.83% | |
Sparse Woodland | 48.34 | 444 | −48.34 | −444 | |||||
Shrubland | 389.25 | 3577 | 501.41 | 4607 | 112.16 | 28.81% | 1031 | 28.81% | |
Bamboo Thicket | 61 | 567 | 75.06 | 698 | 14.06 | 23.05% | 131 | 23.05% | |
Total | 6547.56 | 184,301 | 7209.26 | 193,544 | 661.7 | 10.11% | 9242 | 5.01% | |
Fuyan | Masson Pine | 573.16 | 16,676 | 600.84 | 17,475 | 27.68 | 4.83% | 799 | 4.79% |
Cunninghamia lanceolata | 1211.55 | 31,023 | 1891.13 | 44,838 | 679.58 | 56.09% | 13,814 | 44.53% | |
Broadleaf Deciduous Forest | 839.54 | 19,668 | 733.13 | 14,446 | −106.41 | −12.67% | −5221 | −26.55% | |
Broadleaf Evergreen Forest | 3913.74 | 92,997 | 4073.78 | 96,002 | 160.04 | 4.09% | 3005 | 3.23% | |
Camellia sinensis | 158.93 | 1460 | 118.58 | 1090 | −40.35 | −25.39% | −371 | −25.39% | |
Oak–Hickory Forest | 479.3 | 16,300 | 440.8 | 15,934 | −38.5 | −8.03% | −366 | −2.25% | |
Cupressus funebris Endl | 93.51 | 2522 | 75.94 | 1840 | −17.57 | −18.79% | −682 | −27.06% | |
Sparse Woodland | 174 | 1599 | 175.89 | 1616 | 1.89 | 1.09% | 17 | 1.09% | |
Shrubland | 1177.94 | 10,823 | 1217.39 | 11,186 | 39.45 | 3.35% | 362 | 3.35% | |
Bamboo Thicket | 1001.63 | 9312 | 725.11 | 6741 | −276.52 | −27.61% | −2571 | −27.61% | |
Total | 9623.3 | 202,381 | 10,052.59 | 211,168 | 429.29 | 4.46% | 8787 | 4.34% | |
Angu | Masson Pine | 257.44 | 7670 | 273.03 | 8206 | 15.59 | 6.06% | 537 | 7.00% |
Cunninghamia lanceolata | 900.44 | 27,926 | 820.97 | 28,428 | −79.47 | −8.83% | 502 | 1.80% | |
Broadleaf Deciduous Forest | 524.08 | 13,780 | 926.77 | 23,100 | 402.69 | 76.84% | 9319 | 67.63% | |
Oak–Hickory Forest | 351.11 | 14,155 | 337.87 | 13,919 | −13.24 | −3.77% | −237 | −1.67% | |
Liquidambar formosana Hance | 88.84 | 0 | 96.49 | 0 | 7.65 | 8.61% | 0 | ||
Betula spp. | 107.83 | 0 | 97.31 | 0 | −10.52 | −9.76% | 0 | ||
Paulownia | 42.36 | 0 | 58.55 | 0 | 16.19 | 38.22% | 0 | ||
Sparse Woodland | 82.87 | 761 | 82.87 | 761 | |||||
Shrubland | 2410.03 | 22,144 | 2597.98 | 23,871 | 187.95 | 7.80% | 1727 | 7.80% | |
Total | 4682.13 | 85,675 | 5291.84 | 98,285 | 609.71 | 13.02% | 12,610 | 14.72% | |
Total | 20,852.99 | 472,358 | 22,553.69 | 502,997 | 1700.7 | 8.16% | 30,639 | 6.49% |
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Feng, Q.; Zhou, Z.; Chen, Q.; Zhu, C.; Zhang, L. Evaluating the Ecological Restoration Effectiveness of Poverty Alleviation Relocation through Carbon Storage Analysis: Insights from Karst Regions. Forests 2024, 15, 1006. https://doi.org/10.3390/f15061006
Feng Q, Zhou Z, Chen Q, Zhu C, Zhang L. Evaluating the Ecological Restoration Effectiveness of Poverty Alleviation Relocation through Carbon Storage Analysis: Insights from Karst Regions. Forests. 2024; 15(6):1006. https://doi.org/10.3390/f15061006
Chicago/Turabian StyleFeng, Qing, Zhongfa Zhou, Quan Chen, Changli Zhu, and Lu Zhang. 2024. "Evaluating the Ecological Restoration Effectiveness of Poverty Alleviation Relocation through Carbon Storage Analysis: Insights from Karst Regions" Forests 15, no. 6: 1006. https://doi.org/10.3390/f15061006