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DocumentEffects of different management models on soil organic carbon of natural secondary forests of Quercus Mongolica in China
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.How to improve soil organic carbon content and stock has become the emerging scientific issues under the background of low soil fertility of natural secondary forests in Northeast China. In this study,, we will analyze the impacts of natural restoration management regime, target tree-based forest management regime, and conversion to mixed local valuable broadleaved forest management regime for secondary Quercus mongolica forest on soil organic carbon stocks in a forestry fram of Heilongjiang province. The result showed: (1) SOC content ranked as target tree-based forest management ＞ natural restoration management ＞ conversion to mixed local forest management, and TN,TP, AN, AP and water content were the key factors impacted the SOC content; (2) The different management have no impact on cfPOC and MOC, but the ffPOC content was significantly decreased under target tree-based forest management, while iPOC content was significantly increased under conversion to mixed local forest management; (3) The relative proportion of the functional groups were ranked as O-alkyl C > alkyl C > aromatic C > carbonyl C; (4) MBC was rankded as target tree-based forest management ＞ natural restoration management ＞ conversion to mixed local forest management, and the invertase activity and catalase activity were increased under target tree-based forest management, while urease activity was increased under conversion to mixed local forest management; (5) The carbon sequestration potential was ranked as conversion to mixed local forest management ＞ natural restoration management ＞ target tree-based forest management. In conclusion, these results indicated that the target tree-based forest management has the highest potential to sequestrated carbon in forest soil, and it is a rational management to increase SOC, while conversion to mixed local forest management lead to a loss of SOC and need to protect and repair in future to increase the SOC content. Keywords: Sustainable forest management, Deforestation and forest degradation, Deforestation and forest degradation; Adaptive and integrated management, Policies ID: 3486596 -
DocumentLocal climate mediates spatial and temporal variation in carabid beetle communities in three forests in Mount Odaesan, Republic of Korea
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Global environmental change can dramatically alter the composition of floral and faunal communities, and elucidating the mechanisms underlying this process is important for predicting its outcomes. Studies on global climate change have mostly focused on statistical summaries within wide spatial and temporal scales; less attention has been paid to variability in microclimates at narrower spatial and temporal scales. The microclimate is the suite of climatic conditions measured in a local area. Environmental variables at the microclimatic scale can be critical for the ecology of organisms inhabiting each area. We examined the effect of spatial and temporal changes in the microclimate on the ecology of carabid beetle communities in three sites on Mount Odaesan, Korea. Our results demonstrate the importance of regular surveys of communities at local scales. Such surveys are expected to reveal an additional fraction of variation in communities and underlying processes that have been overlooked in studies of global community patterns and change. Keywords: Research ID: 3622034 -
DocumentComparison of flight capability of two Monochamus beetle species (Coleoptera: Cerambycidae) using flight mills
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.To compare flight capability between males and females of Monochamus alternatus and M. saltuarius, vector insect species for pine wood nematode, a total of 42 adult beetles (25 males and 17 females) for M. alternatus and 42 adult beetles (18 males and 24 females) for M. saltuarius was tested using flight mills. Adult beetles that emerged from Pinus koraiensis logs were tethered on flight mills, and flight distance was measured weekly for entire life span. In each flight session, every tested beetle was tethered on flight mills using insect pin with glue. We only analyzed beetles that flew above 100 m in each flight session. As a result, cumulated flight distance of M. alternatus was longer than that of M. saltuarius. However, the average cumulated flight distances for entire life span was longer in males for two beetle species compared to their females. These results can be used for the estimation of pine wilt disease spread from invaded area to neiboring areas. Keywords: Adaptive and integrated management, Biodiversity conservation, Deforestation and forest degradation ID: 3623055
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