Harvest foundation nn8/11/2023 ![]() ![]() A total of 1614 fires burned 3.52 × 10 6 ha of boreal forests and released 293 Tg carbon into the atmosphere during the 46-year time period from 1965 to 2010 in the Great Xing’an Mountains (Hu et al. However, boreal forests in this region are facing pressures from repeated fires and timber harvesting activities. Therefore, evaluating and distinguishing the effects of fire and harvest on boreal forest carbon stocks is of great importance for predicting the response of boreal forest carbon dynamics to climate change.īoreal forests in the Great Xing’ an Mountains cover 8.46 × 10 5 km 2, store about 350 Tg aboveground carbon, and play an important role in maintaining China’s carbon balance (Fu et al. Furthermore, climate change may increase the frequency and intensity of fire and insect disturbances, which will further exacerbate the loss of carbon from boreal forests (O’Donnell et al. For example, boreal forests in central and eastern Canada were carbon sources (29 ± 21 g m −2 C year) between 19 due to high-intensity fire, harvest, and insect outbreaks (Chen et al. The carbon balance of boreal forests depends on the frequency and intensity of these disturbances (Chen et al. Fire and harvest alter forest productivity, release carbon directly into the atmosphere, and transfer carbon from live biomass into detritus, soils, and forest products (Bhatti et al. The carbon stocks of boreal forests are strongly affected by fire and harvest (Barker et al. They store 52.7 ± 1.7 Pg carbon in aboveground biomass and 170.5 ± 3.8 Pg carbon in soil (Pan et al. These results emphasize that the spatial interactions of fire and harvest play an important role in regulating boreal forest carbon stocks.īoreal forests are an important component of the global carbon cycle (Lutz et al. The response of carbon stocks was impacted by the spatial variability of fire and harvest regimes. The combined effects of fire and harvest on carbon stocks are less than the sum of the separate effects of fire and harvest. The long-term effects of fire and harvest on carbon stocks were greater than the short-term effects. Our simulation suggested that aboveground carbon and soil organic carbon are significantly reduced by fire and harvest over the whole simulation period. ![]() We used a coupled forest landscape model (LANDIS PRO) and a forest ecosystem model (LINKAGES) framework to simulate the landscape-level effects of fire, harvest, and their spatial interactions over 150 years. The objectives of this study were to evaluate the effects of fire, harvest, and their spatial interactions on boreal forest carbon stocks of northeastern China. Carbon stocks of boreal forests are sensitive to climate change, natural disturbances, and human activities. Contextīoreal forests represent about one third of forest area and one third of forest carbon stocks on the Earth. Repeated disturbances associated with short fire return intervals and harvest rotations resulted in landscapes with a higher proportion of young stands that store less carbon than mature stands. Fire, harvest, and their spatial interactions are likely to affect boreal forest carbon stocks. ![]()
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