Abstract Species complementarity by morphological and physiological trait differences could cause distinct temporal and spatial use of resources. Accordingly, mixed stands may enhance production, biodiversity and/or provide a better adaptation to future climate conditions. We aim to identify species differences in intra-annual stem radial variation patterns, and to recognize species-specific responses to contrasting weather conditions at key intra-annual growth phases. Stem radial variation was recorded from high temporal resolution point dendrometers (2012–2014) installed on twelve dominant maritime pine and Pyrenean oak trees in two mixed stands in central Spain. Species differences in stem radial variation were analyzed by synchrony statistics, intra-annual pattern modelling, and evaluating the dependence of main intra-annual growth phases on climate conditions. Both species showed important differences on intra-annual radial increment pattern despite general stem radial variation synchrony. Radial increment onset was earlier for maritime pine during the spring and rainy autumns. Species-specific responses to weather indicate that stem radial variation increased with autumn temperature in maritime pine, but decreased in Pyrenean oak trees. However, summer vapor pressure deficit may reduce stem radial variation for maritime pine. Therefore, maritime pine would adapt more efficiently to warmer temperatures associated with climate change, although summer water stress may reduce this competitive bonus.

中文翻译：

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Pinus pinaster Ait 之间茎径向变异的差异。和 Quercus pyrenaica Willd。可能会释放种间竞争

摘要 形态和生理特征差异导致的物种互补性会导致资源的时空利用差异。因此，混交林可以提高产量、生物多样性和/或更好地适应未来的气候条件。我们的目标是确定年内茎径向变化模式中的物种差异，并在关键的年内生长阶段识别对不同天气条件的物种特异性反应。从安装在西班牙中部两个混合林分的 12 棵主要海松和比利牛斯橡树上的高时间分辨率点树测量仪（2012-2014）记录了茎径向变化。通过同步统计、年内模式模型分析茎径向变异的物种差异，并评估主要年内生长阶段对气候条件的依赖性。尽管总体茎径向变化同步，但两个物种在年内径向增量模式上表现出重要差异。海松在春季和多雨的秋季发生径向增量较早。特定物种对天气的响应表明，海松的茎径向变化随着秋季温度的增加而增加，但在比利牛斯橡树中减少。然而，夏季水汽压不足可能会减少海松的茎径向变化。因此，海松将更有效地适应与气候变化相关的温暖温度，尽管夏季缺水可能会降低这种竞争优势。尽管总体茎径向变化同步，但两个物种在年内径向增量模式上表现出重要差异。海松在春季和多雨的秋季发生径向增量较早。特定物种对天气的响应表明，海松的茎径向变化随着秋季温度的增加而增加，但在比利牛斯橡树中减少。然而，夏季水汽压不足可能会减少海松的茎径向变化。因此，海松将更有效地适应与气候变化相关的温暖温度，尽管夏季缺水可能会降低这种竞争优势。尽管总体茎径向变化同步，但两个物种在年内径向增量模式上表现出重要差异。海松在春季和多雨的秋季发生径向增量较早。特定物种对天气的响应表明，海松的茎径向变化随着秋季温度的增加而增加，但在比利牛斯橡树中减少。然而，夏季水汽压不足可能会减少海松的茎径向变化。因此，海松将更有效地适应与气候变化相关的温暖温度，尽管夏季缺水可能会降低这种竞争优势。特定物种对天气的响应表明，海松的茎径向变化随着秋季温度的增加而增加，但在比利牛斯橡树中减少。然而，夏季水汽压不足可能会减少海松的茎径向变化。因此，海松将更有效地适应与气候变化相关的温暖温度，尽管夏季缺水可能会降低这种竞争优势。特定物种对天气的响应表明，海松的茎径向变化随着秋季温度的增加而增加，但在比利牛斯橡树中减少。然而，夏季水汽压不足可能会减少海松的茎径向变化。因此，海松将更有效地适应与气候变化相关的温暖温度，尽管夏季缺水可能会降低这种竞争优势。