Separate estimation of N export into baseline N leakage without disturbance and N loss due to insect defoliation in a pine forest watershed in central Japan
Separate estimation of N export into baseline N leakage without disturbance and N loss due to insect defoliation in a pine forest watershed in central Japan
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日本中部松林流域的无扰动氮泄漏和由于昆虫落叶导致的氮损失分别估算氮输出基线
DOI：
10.1007/s10661-012-2596-y
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发表时间：
2013
影响因子：
3
通讯作者：
and M. Katsuyama
中科院分区：
文献类型：
--
作者：
Tokuchi;N.;N. Ohte;K. i. Osaka;and M. Katsuyama
松树枯萎病（PWD）是由一种在日本广泛传播的非本土害虫引起的。先前的研究表明，大多数受感染的树木已经死亡，沉积的垃圾导致了河水化学的变化，特别是硝酸盐（NO3−）浓度的增加。在本研究中，我们在长期监测的基础上，将河流氮（N）输出分为PWD导致的N损失和无干扰的基线N泄漏。1990年氮的年输出量为110.0 mol N ha− 1 year − 1，1997年为749.8 mol N ha− 1 year − 1，2005年下降到37.0 mol N ha− 1 year − 1。PWD影响下的氮输出估计为3697 mol N ha-1，由于PWD造成的氮损失为2810 mol N ha-1。由于PWD的N损失是三倍大于基线N泄漏的干扰期间。植物-草食动物关系的这些变化可能会影响森林生态系统中的氮素状况。与非本地物种入侵和人类活动引起的大气氮沉降增加有关的所谓“半自然”干扰将增加。需要对各个方面进行长期监测研究，以深入了解这一生态系统。
Pine wilt disease (PWD) is caused by a non-native pest that has spread extensively throughout Japan. Previous research has indicated that most infected trees have died and the litter deposited has resulted in changes to stream-water chemistry, particularly increased nitrate (NO3−) concentrations. In this study, we divided stream nitrogen (N) export into N loss due to PWD and baseline N leakage without disturbance based on long-term monitoring. The annual N export was 110.0 mol N ha−1year−1in 1990 and 749.8 mol N ha−1year−1in 1997, and had decreased to 37.0 mol N ha−1year−1in 2005. N export under PWD influence was estimated to be 3697 mol N ha−1, and N loss due to PWD was 2810 mol N ha−1. N loss due to PWD was three times larger than baseline N leakage for the disturbed period. These changes in plant–herbivore relationships could affect N status in a forest ecosystem. So-called “semi-natural” disturbances related to non-native species invasion and increases of atmospheric N deposition caused by human activity will increase. Long-term monitoring studies of various aspects are necessary to offer insight into this ecosystem.
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生物地球化学对温带森林盆地水化学测定的影响：决定 pH 值的因素
影响因子：
5.4
作者：
N. Ohte;N. Tokuchi;Masakazu Suzuki
通讯作者：
Masakazu Suzuki
森林中的昆虫落叶和氮循环
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
G. Lovett;L. Christenson;P. Groffman;Clive G. Jones;Julie Hart;M. Mitchell
通讯作者：
M. Mitchell
DOI：
--
发表时间：
1990
期刊：
--
影响因子：
--
作者：
金 載水
通讯作者：
金 載水
影响因子：
2.7
作者：
W. Swank;J. Waide;D. Crossley;R. Todd
通讯作者：
W. Swank;J. Waide;D. Crossley;R. Todd
小规模自然干扰后森林流域硝酸盐流失的机制
影响因子：
2.2
作者：
S. Hobara;N. Tokuchi;N. Ohte;K. Koba;M. Katsuyama;Su;Asami Nakanishi
通讯作者：
Asami Nakanishi