JOURNAL OF BEIJING FORESTRY UNIVERSITY A

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1 JOURNAL OF BEIJING FORESTRY UNIVERSITY Vol. 33 No. 5 Sep LANDIS S A CHEN Hong-wei HU Yuan-man CHANG Yu BU Ren-cang LI Yue-hui LIU Miao. Simulating long-term effects of different harvesting modes on forest fire in Huzhong Forest Region northeastern China. Journal of Beijing Forestry University Ch 31 ref. State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang P. R. China. By using a spatially explicit landscape model LANDIS we simulated the long-term within 300 years dynamics of forest fire regime under four scenarios of harvesting modes i. e. no cutting clear cutting gradual cutting and selective cutting in the Huzhong Forest Region in Da Xing'an Ling Mountains. Results show that forest harvesting could decrease fine fuel loads but no significant difference occurs among various harvesting modes. Forest harvesting could increase coarse fuel loads with the largest increase under clear cutting scenario. In addition forest harvesting could increase the area and frequency of forest fire as well as the fire occurrence probability. Fire occurrence probability under selective cutting scenario was the lowest. Moreover forest harvesting could increase the fire risk class which was the lowest under selective cutting scenario. We suggest that selective cutting mode should be taken under same cutting volume in order to decrease the influence of forest harvesting and fire disturbance on forest ecosystems and hence to guarantee the healthy and sustainable development of forest ecosystems in this region. Key words harvesting modes forest fire spatially explicit landscape model clear cutting gradual cutting selective cutting XDA X iae. ac. cn huym@ iae. ac. cn http journal. bjfu. edu. cn

2 ~ m 812 m m 420 m Larix gmelinii 16 6 Pinus sylvestris var. mongolica Picea koraiensis 7 Pinus pumila 8--9 Betula platyphylla Populus davidiana P. suaveolens Chosenia arbutifolia hm LANDIS hm 2 ~ 100 hm 2 10 ~ LANDIS GIS GIS LANDIS TM 120 / / m 90 m LANDIS LANDIS ~ '40 ~ 52 25'00 N '30 ~ '00 E 125 km 2 P 1 P 2 P r P 1 > P r 115 km hm 2 1 P 1 < P r < P 1 + P 2 2 P 1 + P 2 < P r <

3 5 15 Tab. 1 1 Characteristics of major tree species in Huzhong Forest Region / a / a / m / m / a LANDIS 2 20 m 3 / a TM DEM m 20 LANDIS LANDIS % 0. 76% % % % % 1 2 Fig. 1 1 Land type map of Huzhong Forest Region LANDIS Fig. 2 2 Classification of forest management of Huzhong Forest Region LANDIS LANDIS

4 16 33 < cm cm Tab. 2 2 Harvest parameters of Huzhong Forest Region / % Tab % 0 Forest fire parameters of Huzhong Forest Region / a / a P > Fig. 3 3 Fine fuel load under different harvesting modes 4 22 Fig. 4 Coarse fuel loads under different harvesting modes

5 5 17 P > Fig. 6 6 Fire frequency under different harvesting modes Fig. 5 5 Burning area under different harvesting modes Fig. 7 Fire occurrence probablity under different harvesting modes P > ~ 5 7 P < P < ~ 5

6 18 33 Fig. 8 8 Fire risk class under different harvesting modes LANDIS 60% 15% LANDIS 3 LANDIS % Loehle M LANDIS J.. J.. J. 5 CHANG Y HE H S HU Y M et al. Historic and current fire regimes in the Great Xing'an Mountains northeastern China Implications for long-term forest management J. Forest Ecology and Management RICH P CLARK D B CLARK D A et al. Long-term study of solar radiation regimes in a tropical wet forest using quantum

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