Responses of Tree Transpiration and Growth to Seasonal Rainfall Redistribution in a Subtropical Evergreen Broad-Leaved Forest
Responses of Tree Transpiration and Growth to Seasonal Rainfall Redistribution in a Subtropical Evergreen Broad-Leaved Forest
复制标题
亚热带常绿阔叶林树木蒸腾和生长对季节性降雨再分配的响应
DOI：
10.1007/s10021-017-0185-1
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发表时间：
2018-06
期刊：
影响因子：
3.7
通讯作者：
Lin YB
中科院分区：
文献类型：
--
作者：
Hu YT;ZhaoP;Shen WJ;Zhu LW;Ni GY;Zhao XH;Zhang ZZ;Rao XQ;Ouyang L;Zeng XM;Sun D;Lin YB
降水变化，如更频繁的干旱和降水季节性的改变，可能会对森林生态系统的结构和功能产生重大影响。更好地了解树木对降水变化的反应可以为未来气候制度下的森林保护和管理提供基本信息。我们进行了为期两年的季节降水再分配试验，以评估亚热带常绿阔叶林中树木蒸腾和生长对人工控制降水变化的响应。三种降水处理包括较干湿季处理(DD)、延长旱季较湿季处理(ED)和环境对照处理，三种处理的年降雨量保持不变。结果表明，DD和ED处理分别降低了木荷8-16和13-25%的日蒸腾量。ED处理也降低了大树的胸径生长量。超级个人赛。相反，两种处理对另一优势种火力楠的蒸腾作用和胸径生长量均无明显影响。然而，两种植物的蒸腾作用在年降雨量相差较大的两年间表现出明显的年际差异(2094对1582 mm)。与TOM相比，大叶松的蒸腾/降水比(T/P)低。在DD和ED处理下，Macclureand表现出对总太阳辐射和水汽压亏缺的敏感性降低。这些结果表明，这是一个根深蒂固的问题。与浅根植物相比，超级植物获得水分和吸收碳的能力较低，可能会受到抑制。受降水季节性变化的影响，这可能导致森林群落内物种优势的转移。
Precipitation changes such as more frequent drought and altered precipitation seasonality may impose substantial impacts on the structure and functioning of forest ecosystems. A better understanding of tree responses to precipitation changes can provide fundamental information for the conservation and management of forests under future climate regimes. We conducted a 2-year seasonal rainfall redistribution experiment to assess the responses of tree transpiration and growth to manipulated precipitation changes in a subtropical evergreen broad-leaved forest. Three precipitation treatments were administered including a drier dry season and wetter wet season treatment (DD), an extended dry season and wetter wet season treatment (ED), and an ambient control treatment, with the total amount of annual rainfall being kept the same among the three treatments. Our results showed that the DD and ED treatments reduced daily transpiration ofSchima superbaby 8–16 and 13–25%, respectively. The ED treatment also reduced the DBH increment of largerS. superbaindividuals. In contrast, neither treatment showed obvious effects on the transpiration and DBH increment of another dominant speciesMichelia macclurei. However, the transpiration of both species showed clear inter-annual differences between the 2 years with contrasting annual rainfall (2094 vs 1582 mm).S. superbahad a lower transpiration-to-precipitation ratio (T/P) compared toM. macclureiand showed decreased sensitivities to total solar radiation and vapor pressure deficit under the DD and ED treatments. These results indicate the deep-rootedS. superbamay be suppressed with a lower ability to obtain water and assimilate carbon compared to the shallow-rootedM. macclureiunder the precipitation seasonality changes, which could potentially cause shifts in species dominance within the forest community.
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影响因子：
11.6
作者：
L. Misson;D. Degueldre;C. Collin;R. Rodríguez;A. Rocheteau;J. Ourcival;S. Rambal
通讯作者：
L. Misson;D. Degueldre;C. Collin;R. Rodríguez;A. Rocheteau;J. Ourcival;S. Rambal
DOI：
10.1017/cbo9780511845727.012
发表时间：
2013
期刊：
--
影响因子：
--
作者：
H. Jones
通讯作者：
H. Jones
七种树种水通量对蒸气压不足响应的生物物理限制与对比土地利用制度
影响因子：
6.2
作者：
Gao, Jianguo;Zhao, Ping;Ni, Guangyan
通讯作者：
Ni, Guangyan
影响因子：
4.7
作者：
D. Pataki;R. Oren
通讯作者：
D. Pataki;R. Oren
影响因子：
56.9
作者：
Knapp, AK;Smith, MD
通讯作者：
Smith, MD