Annual leaf loss caused by folivorous insects in tropical rain forests on Mt. Kinabalu, Borneo
Annual leaf loss caused by folivorous insects in tropical rain forests on Mt. Kinabalu, Borneo
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婆罗洲基纳巴卢山热带雨林每年由食叶昆虫造成的树叶损失
DOI：
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发表时间：
2013
影响因子：
1.5
通讯作者：
K. Kikuzawa
中科院分区：
文献类型：
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作者：
Shizuo Suzuki;K. Kitayama;Shin‐ichiro Aiba;Masaaki Takyu;K. Kikuzawa
关于热带森林中林分叶食草的量化的研究很少。我们评估了婆罗洲京那巴鲁山热带雨林沿广泛气候和土壤梯度计算地上净初级生产力（ANPP）时因叶食昆虫导致的每年叶片损失的重要性。我们将林分水平的昆虫叶量估计为林分终生叶损失率和年叶产量的乘积。我们将终生叶损失率定义为叶食昆虫消耗的枯落叶质量与林分水平的枯落叶总质量之比。终生叶片损失率范围为 1.6% 至 8.4%。在这些热带雨林中，由叶食昆虫引起的每年叶片损失范围为 0.01 至 0.38 Mg C ha−1 year−1，或 1.2 至 5.9 % ANPP。我们估计叶食性的方法（1）同时考虑所有树种、树冠层和叶食性昆虫的种类，（2）避免低估叶食草性，因为在叶子脱落时，衰老叶子吸收移动的有机物和无机物，（3）可以很容易地应用于其他地方的森林。
Few studies have been done on the quantification of stand-level leaf herbivory in tropical forests. We evaluated the significance of annual leaf loss due to folivorous insects on the calculation of aboveground net primary production (ANPP) in tropical rain forests along broad climatic and edaphic gradients on Mt. Kinabalu, Borneo. We estimated insect folivory at the stand level as the product of a lifetime leaf loss ratio and annual leaf production in the stand. We defined the lifetime leaf loss ratio as the ratio of litter-leaf mass consumed by folivorous insects to the total litter-leaf mass at the stand level. The lifetime leaf loss ratio ranged from 1.6 to 8.4 %. The annual leaf loss caused by folivorous insects ranged from 0.01 to 0.38 Mg C ha−1 year−1, or from 1.2 to 5.9 % of ANPP in these tropical rain forests. Our method of estimating folivory (1) simultaneously considers all the tree species, canopy layers, and species of folivorous insects, (2) avoids underestimating leaf herbivory due to the resorption of mobile organic and inorganic matter from senescent leaves at the time of leaf abscission, and (3) can readily be applied in forests elsewhere.