Biomass and carbon sequestration of ponderosa pine plantations and native cypress forests in northwest Patagonia
In northwest Patagonia, more than 2 million ha of rangelands are suitable for forestry, and tree plantation or native forest restoration could largely contribute to climate change mitigation. The commonest baseline is the heavily grazed gramineous steppe of Festuca pallescens (St. Yves) Parodi. To assess the carbon sequestration potential of ponderosa pine plantations and native cypress, individual above and below ground biomass models were developed, and scaled to stand level in forests between 600 and 1500 annual rainfall. To calculate the carbon sequestration baseline, the pasture biomass was simulated. Individual stem, foliage, branch and root log linear equations adjusted for pine and cypress trees presented similar slopes, although some differed in the elevations. Biomass carbon was 52.3 Mg ha-1 (S.D. = 30.6) for pine stands and 73.2 Mg ha-1 (S.D. = 95.4) for cypress forests, given stand volumes of 148.1 and 168.4 m3 ha-1 , respectively. Soil carbon was 86.3 Mg ha-1 (S.D. = 46.5) for pine stands and 116.5 Mg ha-1 (S.D. = 38.5) for cypress. Differences in foliage, taproot and soil carbon compartments were highly significative (P < 0.01) between both forest types. Since no differences in soil carbon were found between pasture and both forest types, additionality should be accounted only by biomass. However, the replacement of pasture by pine plantations may decrease the soil carbon storage, at least during the first years. On the other hand, the soil may be a more relevant compartment of sequestered carbon in cypress forests, and if pine plantation replaces cypress forests, soil carbon losses could cause a negative balance.
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| Format: | biblioteca |
| Language: | spa |
| Published: |
Amsterdam Elsevier
2003
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| Subjects: | PINUS PONDEROSA, PLANTACION, BIOMASA, CARBONO, AGRICULTURA, ARGENTINA, PLANTACIONES, CIPRESES, SUELO, ARBOLES, RESTAURACION, |
| Online Access: | https://www.sciencedirect.com/science/article/abs/pii/S0378112702005807?via%3Dihub |
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| Summary: | In northwest Patagonia, more than 2 million ha of rangelands are suitable for forestry, and tree plantation or native forest restoration could largely contribute to climate change mitigation. The commonest baseline is the heavily grazed gramineous steppe of Festuca pallescens (St. Yves) Parodi. To assess the carbon sequestration potential of ponderosa pine plantations and native cypress, individual above and below ground biomass models were developed, and scaled to stand level in forests between 600 and 1500 annual rainfall. To calculate the carbon sequestration baseline, the pasture biomass was simulated. Individual stem, foliage, branch and root log linear equations adjusted for pine and cypress trees presented similar slopes, although some differed in the elevations. Biomass carbon was 52.3 Mg ha-1 (S.D. = 30.6) for pine stands and 73.2 Mg ha-1 (S.D. = 95.4) for cypress forests, given stand volumes of 148.1 and 168.4 m3 ha-1 , respectively. Soil carbon was 86.3 Mg ha-1 (S.D. = 46.5) for pine stands and 116.5 Mg ha-1 (S.D. = 38.5) for cypress. Differences in foliage, taproot and soil carbon compartments were highly significative (P < 0.01) between both forest types. Since no differences in soil carbon were found between pasture and both forest types, additionality should be accounted only by biomass. However, the replacement of pasture by pine plantations may decrease the soil carbon storage, at least during the first years. On the other hand, the soil may be a more relevant compartment of sequestered carbon in cypress forests, and if pine plantation replaces cypress forests, soil carbon losses could cause a negative balance. |
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