马德兰松栎林4种树种生长对气候和干旱的响应

IF 3.8 1区 农林科学 Q1 FORESTRY
Marín Pompa-García , J. Julio Camarero , Cristina Valeriano , Eduardo Daniel Vivar-Vivar
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引用次数: 0

摘要

在不同的混交林中,树木生长对干旱的耐受性受到季节性缺水的影响,尽管它们具有生态和经济意义,但研究不足。结合日尺度和月尺度的径向生长对气候和干旱响应的年际和年内分析,揭示了针叶树和阔叶树共存的不同适应水文气候变率的策略。本文分析了内蒙古西部马德蕾亚松栎林两种针叶树(松、松)和两种阔叶树(黑栎、野杨梅)的生长模式及其对水文气候变率的响应。两种针叶树对日降水的正响应最强烈,但对日降水的正响应在长叶针叶树中达到峰值的时间较长,且长叶针叶树的管胞形成时间较长。稻瘟病菌对温度的负响应较晚,这与稻瘟病菌的木质化较晚一致。在降水减少和最高气温升高的情况下,恩格尔曼尼茅对持续时间较长的干旱表现出最高的响应性(r = 0.72),而arizonica对短暂的春季干旱表现出最低的响应性(r = 0.39)。恩格尔曼氏线虫的生长与太平洋附近的气候-大气环流模式有关。总体而言,恩格尔曼尼和稻谷草生长速度快、起生时间早,而深花草和稻谷草生长速度慢、起生时间晚。Vaganov-Shashkin生长模型证明冬春土壤湿度是生长的关键驱动因素。在更干旱的条件下,更频繁和更热的干旱,松林可能迅速转变为松树橡树混交林。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variable growth responses of four tree species to climate and drought in a Madrean pine-oak forest
The tolerance of tree growth to drought in diverse mixed forests subjected to seasonal water shortage is understudied despite their ecological and economic relevance. By combining intra- and inter-annual analyses of radial growth responses to climate and drought at daily and monthly scales, different strategies to acclimate to hydroclimate variability of coexisting conifers and broadleaves were unveiled. We analyzed the growth patterns and responses to hydroclimate variability in two conifers (Pinus engelmannii, Juniperus deppeana) and two broadleaves (Quercus grisea, Arbutus arizonica) co-occurring in a Madrean pine-oak forest located in NW México. The strongest positive response to daily precipitation was found in the two conifers, but this response peaked earlier in J. deppeana than in P. engelmannii, which presented a more delayed formation of radially-enlarging tracheids. The latest negative response to temperature was found in Q. grisea, which agrees with its more delayed xylogenesis than A. arizonica. P. engelmannii presented the highest responsiveness to water shortage, driven by lower precipitation and high maximum temperatures, responding to longer droughts ending in autumn (r ​= ​0.72), whilst A. arizonica showed the lowest responsiveness to short spring droughts (r ​= ​0.39). Growth of P. engelmannii was linked to climate-atmospheric circulation patterns over the near Pacific Ocean. Overall, P. engelmannii and A. arizonica showed high growth rates and earlier growth onset, whilst J. deppeana and Q. grisea showed slower growth rates and later growth onset. The Vaganov-Shashkin growth model evidenced that winter-spring soil moisture was the key driver of growth. Under more arid conditions and more frequent and hotter droughts, pine stands could rapidly shift towards mixed pine-oak forests.
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来源期刊
Forest Ecosystems
Forest Ecosystems Environmental Science-Nature and Landscape Conservation
CiteScore
7.10
自引率
4.90%
发文量
1115
审稿时长
22 days
期刊介绍: Forest Ecosystems is an open access, peer-reviewed journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of "natural" and "domesticated" forest ecosystems, and their services to people. The journal welcomes innovative science as well as application oriented work that will enhance understanding of woody plant communities. Very specific studies are welcome if they are part of a thematic series that provides some holistic perspective that is of general interest.
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