Defining ecologically relevant vessel parameters in Quercus robur L. for use in dendroecology: a pointer year and recovery time case study in Central Germany
Defining ecologically relevant vessel parameters in Quercus robur L. for use in dendroecology: a pointer year and recovery time case study in Central Germany
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DOI：
10.1007/s00468-015-1183-6
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
B. Kniesel;B. Günther;A. Roloff;G. Arx
中科院分区：
文献类型：
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作者：
B. Kniesel;B. Günther;A. Roloff;G. Arx
确定了最有希望和最有代表性的早期木材容器参数，用于橡树的树木生态学应用。摘要近年来树木年轮和定量木材解剖研究方法的改进有助于扩大包含环境信息的参数的选择。在目前的研究中，我们确定了最有希望的参数，包括信号强度、代表性和适用性，这些参数来自德国两个不同湿度条件下的橡树（栎）。我们分析了3个树轮和15个血管参数。主成分分析用于检测参数相对相似的聚类。采用相关性分析和经典的树木年代学方法选择最稳健的参数。根据我们的筛选标准，从15个初始解剖参数中，有6个被证明适合树轮解剖研究。这些是第一行血管的平均面积，五个最大血管的平均值，总血管面积，除去第一行的血管的总面积，血管密度，以及总血管面积占树轮面积的百分比。将这些参数应用于样本，使用叠加历元分析来搜索对正、负指针年的滞后响应。负，即干燥，指针年在两个地点的分析参数没有引起滞后变化；而正值，即湿润，指针年表现出滞后的负响应的所有参数，这是更明显的干燥地点。
Key messageThe most promising and representative earlywood vessel parameters were identified for dendroecological applications in oak.AbstractRecent improvements of methods used in tree-ring and quantitative wood anatomical studies have helped to widen the selection of parameters which contain environmental information. In the present study, we identified the most promising parameters with respect to signal strength, representativeness, and applicability in oak (Quercus roburL.) from two sites in Germany with different moisture regimes. We analyzed three tree-ring and 15 vessel parameters. Principal component analysis was used to detect clusters of relatively similar parameters. Correlation analysis and classical dendrochronological methods were used to select the most robust parameters. From the 15 initial anatomical parameters, six proved to be suitable for tree-ring anatomical studies based on our screening criteria. These were mean area of the vessels of the first row, mean of the five largest vessels, total vessel area, total area of the vessels excluding the first row, vessel density, and total vessel area as a percentage of tree-ring area. These parameters were applied to samples to search for lagged responses to positive and negative pointer years using superposed epoch analysis. Negative, i.e., dry, pointer years provoked no lagged changes in analyzed parameters at either site; whereas positive, i.e., moist, pointer years showed a lagged negative response of all parameters, which was more pronounced at the drier site.