Continuous earlywood vessels chronologies in floodplain ring-porous species can improve dendrohydrological reconstructions of spring high flows and flood levels
Continuous earlywood vessels chronologies in floodplain ring-porous species can improve dendrohydrological reconstructions of spring high flows and flood levels
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DOI：
10.1016/j.jhydrol.2016.01.002
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发表时间：
2016-03-01
影响因子：
6.4
通讯作者：
Bergeron, Y.
中科院分区：
文献类型：
--
作者：
Kames, S.;Tardif, J. C.;Bergeron, Y.
植物通过生长和发育的变化对环境刺激作出反应。木材细胞的特征，例如导管分子（以下称为导管）的横截面积，可以存储关于导管分化时存在的环境因素的信息。因此，对导管特征的分析提供了与年轮宽度不同的时间分辨率，因为树木年轮中的导管在几天到几周内就发生了分化。很少有研究已经进行了对敏感性的早材船只在环孔物种在应对洪水。本研究的总体目标是确定可塑性的早材船舶高流量和春季洪水泛滥的河漫滩黑灰（白蜡沼泽。）树木和评估实用程序开发连续早材船舶年表在树木水文重建。相反，到目前为止，大多数树木水文学研究主要使用船舶异常（洪水环）作为离散变量来识别异常洪水事件。研究区位于魁北克西北部的北方地区。血管和环宽度年表从F。生长在杜帕奎特湖漫滩上的黑树在所有水文气候变量中，春季流量对船舶形成的影响最大，该信号在空间和频域上都是相干的。平均血管面积年表与放电呈显著负相关，并且这种关联的线性和强度都是独特的。在洪泛区F.黑檀树，春季洪水促进了更丰富，但较小的早材船只的形成。早材船只年表也显着相关的其他水文指标，如杜帕尔奎特湖的冰破裂日期和冰痕频率和高度年表。这些重要的关系强调了在仪器数据之前开发用于水文重建的连续船舶年表的实用性。连续早材船舶年表也可能是有用的，在确定改变水文制度的影响，在河漫滩栖息地调节春季洪水。未来的研究应涉及量化高流量和洪水对其他细胞成分的影响，并确定河漫滩扩散多孔物种的连续解剖系列的可塑性和实用性。(C)© 2016 Elsevier B.V.版权所有。
Plants respond to environmental stimuli through changes in growth and development. Characteristics of wood cells such as the cross-sectional area of vessel elements (hereafter referred to as vessels) may store information about environmental factors present at the time of vessel differentiation. The analysis of vessel characteristics therefore offers a different time resolution than annual ring width because vessels in tree rings differentiate within days to a few weeks. Little research has been conducted on the sensitivity of earlywood vessels in ring-porous species in response to flooding. The general objectives of this study were to determine the plasticity of earlywood vessel to high flows and spring flooding in floodplain black ash (Fraxinus nigra Marsh.) trees and to assess the utility of developing continuous earlywood vessel chronologies in dendrohydrological reconstruction. In contrast, most dendrohydrological studies until now have mainly used vessel anomalies (flood rings) as discrete variables to identify exceptional flood events. The study area is located in the boreal region of northwestern Quebec. Vessel and ring-width chronologies were generated from F. nigra trees growing on the floodplain of Lake Duparquet. Spring discharge had among all hydro-climatic variables the strongest impact on vessel formation and this signal was coherent spatially and in the frequency domain. The mean vessel area chronology was significantly and negatively correlated to discharge and both the linearity and the strength of this association were unique. In floodplain F. nigra trees, spring flooding promoted the formation of more abundant but smaller earlywood vessels. Earlywood vessels chronologies were also significantly associated with other hydrological indicators like Lake Duparquet's ice break-up date and both ice-scar frequency and height chronologies. These significant relationships stress the utility of developing continuous vessels chronologies for hydrological reconstructions prior to instrumental data. Continuous earlywood vessel chronologies may also be useful in determining the impact of altered hydrological regime in floodplain habitat regulated by spring floods. Future research should involve quantifying the impact of high flows and flooding on other cell constituents and also determining the plasticity and utility of continuous anatomical series in floodplain diffuse-porous species. (C) 2016 Elsevier B.V. All rights reserved.