Seasonal cambium activity in the subtropical rain forest tree Araucaria angustifolia
Seasonal cambium activity in the subtropical rain forest tree Araucaria angustifolia
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DOI：
10.1007/s00468-008-0259-y
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
J. M. Oliveira;Emiliano Santarosa;V. Pillar;F. Roig
中科院分区：
文献类型：
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作者：
J. M. Oliveira;Emiliano Santarosa;V. Pillar;F. Roig
树木年轮形成的时间和动态信息对于评估次生木材生长的季节性行为及其相关的环境影响至关重要。之前的调查表明，它们的生长轮每年形成一次，但没有关于生长轮形成时间和影响形成层活动的环境触发因素的信息。在本文中，我们研究了年内和年间形成层的活动在A。通过两个研究地点的解剖学和树木年代学证据，建立了区域气候变化和年内树木年轮形成之间的关系模型。结果证实了A. angustifolia和表明其生长季节从10月延伸到4月。日长和温度是影响季节性形成层活动的主要环境因子。我们的结果证明了A. angustifolia在南美洲东南部的生态和气候研究。
Information on the timing and dynamics of tree ring formation is essential to assess the seasonal behavior of secondary wood growth and its associated environmental influences.Araucaria angustifoliais a dominant species in highland pluvial ecosystems of southeastern South America. Previous investigations indicated that their growth rings are formed annually, but no information exists about the timing of growth ring formation and the environmental triggers influencing cambium activity. In this paper we examine inter- and intra-annual cambial activity inA. angustifolia, through anatomical and dendrochronological evidence at two study sites, and model the relationships between regional climate variation and intra-annual tree ring formation. The results confirm the annual growth ring formation inA. angustifoliaand indicate that its growth season extends from October to April. Day length and temperature were the main environmental factors influencing the seasonal cambium activity. Our results evidence the dendrochronological potential ofA. angustifoliafor ecological and climatological studies in southeastern South America.