Rainfall partitioning and associated chemical alteration in three subtropical urban tree species
Rainfall partitioning and associated chemical alteration in three subtropical urban tree species
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三种亚热带城市树种的降雨分配和相关化学变化
DOI：
10.1016/j.jhydrol.2021.127109
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发表时间：
2021-12
影响因子：
6.4
通讯作者：
Hua-Wu Wu
中科院分区：
文献类型：
--
作者：
Zhi-Yun Jiang;Qiu-Ying Zhi;John T. Van Stan;Si-Yi Zhang;Yi-Hua Xiao;Xiao-Ying Chen;Xiao Yang;Hou-Yun Zhou;Zhong-Min Hu;Hua-Wu Wu
雨水在穿过树冠到达土壤表面时会发生水文和化学变化，但城市森林生态系统的这一方面比自然生态系统受到的关注更少。以3种典型的亚热带城市树种(冠层较大但形态不同的大叶紫薇)为参照，研究了中国南部广州市城市森林中降水的水文分配和溶质组成的变化。从2018年9月至2019年9月，对降雨的三个组成部分，即穿透雨、树干径流和截留进行了测量和采样。利用冠层收支模型估算了冠层交换和干沉降对净降雨量(穿透雨+树干径流)溶质通量的贡献。作为棕榈树，区域刺梨的穿透雨(72.60%)和树干径流(8.68%)的比例最高，而截留量较高。Microcarpa(33.48%)和L.特殊(30.54%)。穿透雨和树干径流中几乎所有溶质(Ca~(2+)、K~+、Na~+、Mg~(2+)、Cl~(2+)、NO_3~(2-)−和SO_4~(2+)−)的浓度均高于降雨，表明这些溶质通过林冠富集了水体。冠层收支模型还表明，虽然三种植物在大量营养元素阳离子的淋溶方面是相似的，但在阴离子方面有所不同：而R。Regia和L.在树叶、树枝或树干上特殊地吸收或保留阴离子，微囊藻能够吸收氯离子−和硝酸根−(可能是因为它独特的气生根)。这些结果可以为城市森林的设计提供参考。例如，缺乏3号−摄取的BYF。结果表明，与其他两个树种相比，小果树更不适合缓解中国南部地区的氮素沉积问题；另一方面，它的降雨分配和冠层交换特性也不太适合于缓解这一问题。使其更适合于截留雨水和缓解氮素沉积问题。因此，这项研究结果对世界各地类似亚热带地区城市树种的选择具有重要意义。
Rainwater is altered hydrologically and chemically as it passes through tree canopies to reach the soil surface, but this aspect of urban forest ecosystems has received less attention than that of natural ecosystems. Hydrological partitioning and changes in solute composition of rainfall were examined in an urban forest within Guangzhou city, in southern China, with reference to three typical subtropical urban tree species (Roystonea regia,Ficus microcarpa, andLagerstroemia speciosa) with large but morphologically distinct canopies. Three components of rainfall, namely throughfall, stemflow, and interception, were measured and sampled from September 2018 to September 2019. A canopy budget model was used for estimating the contribution of canopy exchange and dry deposition to net rainfall (throughfall + stemflow) solute flux. Being a palm,R. regiarecorded the highest percentages of throughfall (72.60%) and stemflow (8.68%) whereas interception was higher inF. microcarpa(33.48%) andL. speciosa(30.54%). The concentrations of almost all the solutes (Ca2+, K+, Na+, Mg2+, Cl−, NO3−, and SO42−) in throughfall and stemflow were higher than those in rainfall, suggesting that water was enriched with these solutes as a result of passing through the canopy. The model of canopy budget also showed that whereas all the three species were similar in terms of the leaching of macronutrient cations, the species differed in term of anions: whereasR. regiaandL. speciosagenerally absorbed or retained anions on foliage, twigs, or trunks,F. microcarpaleached Cl−and NO3−(presumably because of its unique aerial root). These results can inform the design of urban forests. For example, the lack of NO3−uptake byF. microcarpasuggests that it would be less suitable for mitigating the problems of N deposition which are significant in southern China than the other two species; on other hand, the rainfall partitioning and canopy exchange characteristics ofL. speciosamake it more suitable for intercepting rainwater as well as for alleviating the problem of N deposition. The findings of this study therefore have significant implications for the selection of urban tree species in similar subtropical regions worldwide.
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影响因子：
5.4
作者：
W. Liang;K. Kosugi;T. Mizuyama
通讯作者：
W. Liang;K. Kosugi;T. Mizuyama
中国中南亚热带混交林大量降水和径流的沉积模式
影响因子：
2.8
作者：
Xu, Min;Xiang, Ren-Jun;Su, Xiao-Kang;Jiang, Yi-Min;Zhang, Gong;Du, Chun-Yan;Zeng, Guang-Ming;Huang, Lu;Zhang, Chang
通讯作者：
Zhang, Chang
DOI：
--
发表时间：
1998
期刊：
--
影响因子：
--
作者：
Su Juan;Sun Bing;Huang Jiaping
通讯作者：
Su Juan;Sun Bing;Huang Jiaping
影响因子：
0.8
作者：
Dovey, S. B.;du Toit, B.;de Clercq, W.
通讯作者：
de Clercq, W.
影响因子：
4
作者：
Macinnis-Ng, Catriona M. O.;Flores, Eric E.;Schwendenmann, Luitgard
通讯作者：
Schwendenmann, Luitgard