Base cation leaching from the canopy of a subtropical rainforest in northeastern Taiwan
Base cation leaching from the canopy of a subtropical rainforest in northeastern Taiwan
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DOI：
10.1139/x01-035
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发表时间：
2001
影响因子：
2.2
通讯作者：
T. Lin;S. Hamburg;Y. Hsia;H. King;Lih-Jih Wang;K. Lin
中科院分区：
文献类型：
--
作者：
T. Lin;S. Hamburg;Y. Hsia;H. King;Lih-Jih Wang;K. Lin
我们研究了台湾东北部亚热带雨林冠层的盐基阳离子淋失。森林的特点是冠层植被和土壤中的盐基阳离子含量极低。K+、Ca ~（2+）和Mg ~（2+）的冠层淋失率很高，分别占叶片贮量的30%、35%和190%。H+在冠层中的保留率与碱金属阳离子淋失率接近，表明阳离子淋失正在中和酸沉降。亚热带森林研究沥滤阳离子从树冠全年，不像温带落叶林，这是在冬季生理惰性。由于降雨频繁、相对湿度高，亚热带森林的林冠层在整个冬季都受到酸沉降和雾的影响。与温带森林相比，这种持续的酸性降水对亚热带森林的冠层可能造成更强烈的负面影响。
We examined base cation leaching from the canopy of a subtropical rainforest in northeastern Taiwan. The forest is characterized by extremely low levels of base cations in both canopy vegetation and in the soils. The rates of canopy leaching of K+, Ca2+, and Mg2+ were very high, representing up to 30, 35, and 190%, respectively, of the amount stored in leaves. The rate of H+ retention in the canopy was close to the rate of base cation leaching, suggesting that cation leaching is neutralizing acid precipitation. The subtropical forest studied leached cations from the canopy throughout the year, unlike temperate deciduous forests, which are physiologically inert in the winter. The forest canopy of the subtropical forest we studied is impacted by acid deposition and fog throughout the winter because of frequent rainfall and high relative humidity. This continuous exposure to acid precipitation could cause more intense negative effects on the canopy of subtropical forests as compared with temperate forests ex...