Factors affecting the typhoon damage to coastal shelterbelt forests in eastern Fujian of East China.
Factors affecting the typhoon damage to coastal shelterbelt forests in eastern Fujian of East China.
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发表时间：
2012
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通讯作者：
Liu Ping-ping
中科院分区：
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作者：
Liu Ping-ping
以2010年“鲇鱼”台风为例，调查了其对闽东沿海主要防护林的危害情况，并分析了相关影响因子，结果表明：不同树种的危害程度存在明显差异，阔叶树种的危害程度大于针叶树种，阔叶树种的平均受害等级和受害指数分别比针叶树种高79.1%和76.7%，其中桉树受害最重，平均受害等级和受害指数分别为90.5%和36.2%，比木麻黄和湿地松分别高86.7%和36.6%，从受害方式上看，以断茎最为常见，占40.7%不同径级的树木受台风危害程度差异显著，断干主要发生在胸径12 cm和14 cm的树木上10 ~ 12 cm径级的树木易发生拔根，受害率为57.9%，不同径级的树木易发生弯曲和断头，在14 cm径级的树木受害率最高，分别为28.6%和18.3%。地形条件等非生物因子也是影响台风危害的重要因子，迎风坡和陡坡的危害程度大于背风坡和缓坡，在迎风坡上，坡底的受害程度大于坡顶，而在背风坡上，则相反，割胶对湿地松的抗风能力有负面影响，割胶对湿地松的危害指数为：割胶的湿地松比未割胶的湿地松高40.6%，割胶的湿地松断干率达92.7%。
Taking the typhoon Megi in 2010 as a case,this paper investigated its damage to the main coastal shelterbelt forests in eastern Fujian,and analyzed the related affecting factors.The damaged degree had an obvious difference among the tree species.Broadleaf species were more severely damaged than coniferous species,with the mean damage grade and damage index of broadleaf species being 79.1% and 76.7% higher than those of the coniferous species,respectively.Among the broadleaf species,Eucalyptus received most severe damage,with the mean damage grade and damage index being 90.5% and 36.2%,and 86.7% and 36.6% higher than those of Casuarina and Pinus elliottii,respectively.In terms of damage pattern,stem breakage occurred most commonly,accounting for 40.7% of the total.The trees with different sizes had significant difference in suffering typhoon damage.Stem breakage occurred mostly on the trees at DBH ranging from 12 cm and 14 cm,with a damaged percentage of 56.8%,uprooting occurred mostly on the trees at DBH ranging from 10 cm and 12 cm,with a damaged percentage of 57.9%,while bending and decapitation occurred almost evenly on the trees at different DBH,with a climax at 14 cm,accounting for 28.6% and 18.3%,respectively.Wind-resistance was positively correlated with tree taper,but negatively correlated with tree height,crown area,and crown relative height.Abiotic factors such as topographical condition were another important factors related to typhoon damage.The damage was more severe at windward slope and steep slope than at leeward and gentle slope,and was more severe at slope bottom than at slope top on the windward slope but was reverse on the leeward slope.Resin-tapping had negative effects on the wind-resistance of P.elliottii.The damage index of resin-tapped P.elliottii was 40.6% higher than that of non-tapped trees,and resin-tapped trees received stem breakage at a percentage of 92.7%.