首页|Carbon storage along a stand development sequence in a New Zealand Nothofagus forest
Carbon storage along a stand development sequence in a New Zealand Nothofagus forest
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NSTL
Indigenous forests cover about 6.4 x 10(6) ha or 24% of the land area of New Zealand and thus form a major carbon (C) pool, but there are few estimates of C storage for these forests, especially at different stages of stand development. C storage and distribution in stemwood, coarse woody debris, forest (floor litter (L) + fermentation/humus(FH)-layers) and upper (0-0.1 m) mineral soil were measured along a stand development sequence in montane zone mountain beech (Nothofagus solandri var. cliffortioides) forest in the Craigieburn Range, central South Island. C storage in all pools peaked in 125-year-old pole stands (219 Mg/ha) and declined as the stands matured (>150 years old, 192 Mg/ha), and were replaced by seedling stands (10 years old, 152 Mg/ha) following windthrow, to reach a low point (114 Mg/ha) in 25-year-old sapling stands. Coarse woody debris provided an important pool for C storage following catastrophic forest disturbance, and varied reciprocally with stemwood along the development sequence. Above-ground components showed a much greater range (88 Mg/ha) with stand development than forest floor and mineral soil components (16 Mg/ha). Stemwood and coarse woody debris components varied by 136 and 76 Mg/ha, respectively, while litter, the FH-layer and upper mineral soil C varied by 4, 17, and 12 Mg/ha, respectively. The sum of forest floor and mineral soil C ranged between 53 Mg/ha (sapling stage) and 69 Mg/ha (pole stage), and did not differ significantly with age.
NSTL
